diff -rc2P 3DLDF-2.0.2/README 3DLDF-2.0.3/README
*** 3DLDF-2.0.2/README	Thu Nov  7 13:51:40 2013
--- 3DLDF-2.0.3/README	Fri Dec 13 16:36:51 2013
***************
*** 50,54 ****
  * Downloading
  
! GNU 3DLDF 2.0 is available for downloading from the following servers using
  the protocols indicated (i.e., `ftp', `http', and `rsync'): 
  
--- 50,54 ----
  * Downloading
  
! GNU 3DLDF 2.0.3 is available for downloading from the following servers using
  the protocols indicated (i.e., `ftp', `http', and `rsync'): 
  
***************
*** 60,64 ****
  * Mailing lists
  
! The following mailing lists are now available:
  
  help-3dldf@gnu.org --- For users to ask one another for help.  
--- 60,64 ----
  * Mailing lists
  
! The following mailing lists are available:
  
  help-3dldf@gnu.org --- For users to ask one another for help.  
***************
*** 79,83 ****
  * Documentation
  
! See the directories 3DLDF-2.0/doc/ and 3DLDF-2.0/doc/old_doc.
  
  
--- 79,83 ----
  * Documentation
  
! See the directories 3DLDF-2.0.3/doc/ and 3DLDF-2.0.3/doc/old_doc.
  
  
***************
*** 89,93 ****
  e.g.:
  
!    cd <your path>/3DLDF-2.0 
     export LIBS="-lgsl -lgslcblas -lm"
     configure --prefix=`pwd`
--- 89,93 ----
  e.g.:
  
!    cd <your path>/3DLDF-2.0.3 
     export LIBS="-lgsl -lgslcblas -lm"
     configure --prefix=`pwd`
***************
*** 95,99 ****
  or 
  
!    cd <your path>/3DLDF-2.0 
     configure --prefix=`pwd` LIBS="-lgsl -lgslcblas -lm"
  
--- 95,99 ----
  or 
  
!    cd <your path>/3DLDF-2.0.3 
     configure --prefix=`pwd` LIBS="-lgsl -lgslcblas -lm"
  
***************
*** 101,105 ****
  i.e., the top-level distribution directory.  It is safe to do this.  
  
! Alternatively, the shellscript `3DLDF-2.0/reconfig.sh' may be used to call
  `configure'.  If `reconfig.sh' is invoked without any arguments, or if its 
  first argument is 0, shared libraries will be built.  Otherwise, they won't.
--- 101,105 ----
  i.e., the top-level distribution directory.  It is safe to do this.  
  
! Alternatively, the shellscript `3DLDF-2.0.3/reconfig.sh' may be used to call
  `configure'.  If `reconfig.sh' is invoked without any arguments, or if its 
  first argument is 0, shared libraries will be built.  Otherwise, they won't.
***************
*** 122,126 ****
  however, it must be specified.
  
! See the subdirectories `3DLDF-2.0/src/' and `3DLDF-2.0/examples/' for examples.
  
  %% Local Variables:
--- 122,126 ----
  however, it must be specified.
  
! See the subdirectories `3DLDF-2.0.3/src/' and `3DLDF-2.0.3/examples/' for examples.
  
  %% Local Variables:
diff -rc2P 3DLDF-2.0.2/configure 3DLDF-2.0.3/configure
*** 3DLDF-2.0.2/configure	Sun Nov 10 18:30:12 2013
--- 3DLDF-2.0.3/configure	Wed Dec 11 19:09:09 2013
***************
*** 1,5 ****
  #! /bin/sh
  # Guess values for system-dependent variables and create Makefiles.
! # Generated by GNU Autoconf 2.68 for GNU 3DLDF 2.0.2.
  #
  # Report bugs to <Laurence.Finston@gmx.de>.
--- 1,5 ----
  #! /bin/sh
  # Guess values for system-dependent variables and create Makefiles.
! # Generated by GNU Autoconf 2.68 for GNU 3DLDF 2.0.3.
  #
  # Report bugs to <Laurence.Finston@gmx.de>.
***************
*** 571,576 ****
  PACKAGE_NAME='GNU 3DLDF'
  PACKAGE_TARNAME='3DLDF'
! PACKAGE_VERSION='2.0.2'
! PACKAGE_STRING='GNU 3DLDF 2.0.2'
  PACKAGE_BUGREPORT='Laurence.Finston@gmx.de'
  PACKAGE_URL='http://www.gnu.org/software/3DLDF/'
--- 571,576 ----
  PACKAGE_NAME='GNU 3DLDF'
  PACKAGE_TARNAME='3DLDF'
! PACKAGE_VERSION='2.0.3'
! PACKAGE_STRING='GNU 3DLDF 2.0.3'
  PACKAGE_BUGREPORT='Laurence.Finston@gmx.de'
  PACKAGE_URL='http://www.gnu.org/software/3DLDF/'
***************
*** 1319,1323 ****
    # This message is too long to be a string in the A/UX 3.1 sh.
    cat <<_ACEOF
! \`configure' configures GNU 3DLDF 2.0.2 to adapt to many kinds of systems.
  
  Usage: $0 [OPTION]... [VAR=VALUE]...
--- 1319,1323 ----
    # This message is too long to be a string in the A/UX 3.1 sh.
    cat <<_ACEOF
! \`configure' configures GNU 3DLDF 2.0.3 to adapt to many kinds of systems.
  
  Usage: $0 [OPTION]... [VAR=VALUE]...
***************
*** 1389,1393 ****
  if test -n "$ac_init_help"; then
    case $ac_init_help in
!      short | recursive ) echo "Configuration of GNU 3DLDF 2.0.2:";;
     esac
    cat <<\_ACEOF
--- 1389,1393 ----
  if test -n "$ac_init_help"; then
    case $ac_init_help in
!      short | recursive ) echo "Configuration of GNU 3DLDF 2.0.3:";;
     esac
    cat <<\_ACEOF
***************
*** 1508,1512 ****
  if $ac_init_version; then
    cat <<\_ACEOF
! GNU 3DLDF configure 2.0.2
  generated by GNU Autoconf 2.68
  
--- 1508,1512 ----
  if $ac_init_version; then
    cat <<\_ACEOF
! GNU 3DLDF configure 2.0.3
  generated by GNU Autoconf 2.68
  
***************
*** 2052,2056 ****
  running configure, to aid debugging if configure makes a mistake.
  
! It was created by GNU 3DLDF $as_me 2.0.2, which was
  generated by GNU Autoconf 2.68.  Invocation command line was
  
--- 2052,2056 ----
  running configure, to aid debugging if configure makes a mistake.
  
! It was created by GNU 3DLDF $as_me 2.0.3, which was
  generated by GNU Autoconf 2.68.  Invocation command line was
  
***************
*** 2916,2920 ****
  # Define the identity of the package.
   PACKAGE='3DLDF'
!  VERSION='2.0.2'
  
  
--- 2916,2920 ----
  # Define the identity of the package.
   PACKAGE='3DLDF'
!  VERSION='2.0.3'
  
  
***************
*** 17442,17446 ****
  # values after options handling.
  ac_log="
! This file was extended by GNU 3DLDF $as_me 2.0.2, which was
  generated by GNU Autoconf 2.68.  Invocation command line was
  
--- 17442,17446 ----
  # values after options handling.
  ac_log="
! This file was extended by GNU 3DLDF $as_me 2.0.3, which was
  generated by GNU Autoconf 2.68.  Invocation command line was
  
***************
*** 17510,17514 ****
  ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
  ac_cs_version="\\
! GNU 3DLDF config.status 2.0.2
  configured by $0, generated by GNU Autoconf 2.68,
    with options \\"\$ac_cs_config\\"
--- 17510,17514 ----
  ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
  ac_cs_version="\\
! GNU 3DLDF config.status 2.0.3
  configured by $0, generated by GNU Autoconf 2.68,
    with options \\"\$ac_cs_config\\"
diff -rc2P 3DLDF-2.0.2/configure.ac 3DLDF-2.0.3/configure.ac
*** 3DLDF-2.0.2/configure.ac	Sun Nov 10 18:30:05 2013
--- 3DLDF-2.0.3/configure.ac	Wed Nov 13 13:43:43 2013
***************
*** 50,54 ****
    
  .# Process this file with autoconf to produce a configure script.
! AC_INIT([GNU 3DLDF], [2.0.2], [Laurence.Finston@gmx.de], [3DLDF])
  AC_CONFIG_SRCDIR([src/main.web])
  AM_INIT_AUTOMAKE
--- 50,54 ----
    
  .# Process this file with autoconf to produce a configure script.
! AC_INIT([GNU 3DLDF], [2.0.3], [Laurence.Finston@gmx.de], [3DLDF])
  AC_CONFIG_SRCDIR([src/main.web])
  AM_INIT_AUTOMAKE
Binary files 3DLDF-2.0.2/doc/3dldf.dvi and 3DLDF-2.0.3/doc/3dldf.dvi differ
diff -rc2P 3DLDF-2.0.2/doc/3dldf.html 3DLDF-2.0.3/doc/3dldf.html
*** 3DLDF-2.0.2/doc/3dldf.html	Wed Nov  6 17:51:37 2013
--- 3DLDF-2.0.3/doc/3dldf.html	Fri Dec 13 16:56:52 2013
***************
*** 203,212 ****
  <p><a name="index-interactive-program-1"></a><a name="index-program_002c-interactive-2"></a>This manual documents 3DLDF 2.0.  The most important difference between release 2.0 and
  previous releases is that 3DLDF 2.0 is an <dfn>interactive</dfn> program, whereas in previous
! releases, 3DLDF was more like a <dfn>library</dfn> of C++
!  functions that users could use
  in their own programs to make drawings.
  
!    <p><a name="index-language-3"></a>Now, 3DLDF implements a <dfn>language</dfn> similar to the METAFONT
!  language, and in particular
  the MetaPost language derived from it.
  
--- 203,210 ----
  <p><a name="index-interactive-program-1"></a><a name="index-program_002c-interactive-2"></a>This manual documents 3DLDF 2.0.  The most important difference between release 2.0 and
  previous releases is that 3DLDF 2.0 is an <dfn>interactive</dfn> program, whereas in previous
! releases, 3DLDF was more like a <dfn>library</dfn> of C++ functions that users could use
  in their own programs to make drawings.
  
!    <p><a name="index-language-3"></a>Now, 3DLDF implements a <dfn>language</dfn> similar to the METAFONT language, and in particular
  the MetaPost language derived from it.
  
***************
*** 416,420 ****
       <br><dt><code>focus</code><dd><a name="index-perspective-projection-7"></a>Focus for the <dfn>perspective projection</dfn>.
  
!      <dt><code>pen</code>
  <dt><code>dash_pattern</code>
  <dt><code>color</code>
--- 414,418 ----
       <br><dt><code>focus</code><dd><a name="index-perspective-projection-7"></a>Focus for the <dfn>perspective projection</dfn>.
  
!      <br><dt><code>pen</code>
  <dt><code>dash_pattern</code>
  <dt><code>color</code>
diff -rc2P 3DLDF-2.0.2/doc/3dldf.info 3DLDF-2.0.3/doc/3dldf.info
*** 3DLDF-2.0.2/doc/3dldf.info	Wed Nov  6 17:51:37 2013
--- 3DLDF-2.0.3/doc/3dldf.info	Fri Dec 13 16:56:52 2013
***************
*** 96,104 ****
  release 2.0 and previous releases is that 3DLDF 2.0 is an "interactive"
  program, whereas in previous releases, 3DLDF was more like a "library"
! of C++  functions that users could use in their own programs to make
  drawings.
  
!    Now, 3DLDF implements a "language" similar to the METAFONT
! language, and in particular the MetaPost language derived from it.
  
     For several years, interactive versions of 3DLDF have been available
--- 96,104 ----
  release 2.0 and previous releases is that 3DLDF 2.0 is an "interactive"
  program, whereas in previous releases, 3DLDF was more like a "library"
! of C++ functions that users could use in their own programs to make
  drawings.
  
!    Now, 3DLDF implements a "language" similar to the METAFONT language,
! and in particular the MetaPost language derived from it.
  
     For several years, interactive versions of 3DLDF have been available
***************
*** 1566,1579 ****
  Node: Top779
  Node: Introduction1930
! Node: Installation4116
! Node: Invoking4236
! Node: Getting Started5135
! Node: Data Types5262
! Node: FDL7144
! Node: GPL32256
! Node: Variable Index69789
! Node: Data Type Index69929
! Node: Function Index70082
! Node: Concept Index70232
  
  End Tag Table
--- 1566,1579 ----
  Node: Top779
  Node: Introduction1930
! Node: Installation4115
! Node: Invoking4235
! Node: Getting Started5134
! Node: Data Types5261
! Node: FDL7143
! Node: GPL32255
! Node: Variable Index69788
! Node: Data Type Index69928
! Node: Function Index70081
! Node: Concept Index70231
  
  End Tag Table
Binary files 3DLDF-2.0.2/doc/3dldf.pdf and 3DLDF-2.0.3/doc/3dldf.pdf differ
diff -rc2P 3DLDF-2.0.2/doc/3dldf.ps 3DLDF-2.0.3/doc/3dldf.ps
*** 3DLDF-2.0.2/doc/3dldf.ps	Wed Nov  6 17:51:37 2013
--- 3DLDF-2.0.3/doc/3dldf.ps	Fri Dec 13 16:56:52 2013
***************
*** 2,6 ****
  %%Creator: dvips(k) 5.991 Copyright 2011 Radical Eye Software
  %%Title: 3dldf.dvi
! %%CreationDate: Wed Nov  6 18:51:36 2013
  %%Pages: 34
  %%PageOrder: Ascend
--- 2,6 ----
  %%Creator: dvips(k) 5.991 Copyright 2011 Radical Eye Software
  %%Title: 3dldf.dvi
! %%CreationDate: Fri Dec 13 17:56:52 2013
  %%Pages: 34
  %%PageOrder: Ascend
***************
*** 13,17 ****
  %DVIPSCommandLine: dvips -o 3dldf.ps 3dldf.dvi
  %DVIPSParameters: dpi=600
! %DVIPSSource:  TeX output 2013.11.06:1851
  %%BeginProcSet: tex.pro 0 0
  %!
--- 13,17 ----
  %DVIPSCommandLine: dvips -o 3dldf.ps 3dldf.dvi
  %DVIPSParameters: dpi=600
! %DVIPSSource:  TeX output 2013.12.13:1756
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***************
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! cleartomark
! {restore}if
! %%EndFont 
! %%BeginFont: CMTT10
! %!PS-AdobeFont-1.0: CMTT10 003.002
! %%Title: CMTT10
! %Version: 003.002
! %%CreationDate: Mon Jul 13 16:17:00 2009
! %%Creator: David M. Jones
! %Copyright: Copyright (c) 1997, 2009 American Mathematical Society
! %Copyright: (<http://www.ams.org>), with Reserved Font Name CMTT10.
! % This Font Software is licensed under the SIL Open Font License, Version 1.1.
! % This license is in the accompanying file OFL.txt, and is also
! % available with a FAQ at: http://scripts.sil.org/OFL.
! %%EndComments
! FontDirectory/CMTT10 known{/CMTT10 findfont dup/UniqueID known{dup
! /UniqueID get 5000832 eq exch/FontType get 1 eq and}{pop false}ifelse
! {save true}{false}ifelse}{false}ifelse
! 11 dict begin
! /FontType 1 def
! /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def
! /FontName /CMTT10 def
! /FontBBox {-4 -233 537 696 }readonly def
! /UniqueID 5000832 def
! /PaintType 0 def
! /FontInfo 9 dict dup begin
! /version (003.002) readonly def
! /Notice (Copyright \050c\051 1997, 2009 American Mathematical Society \050<http://www.ams.org>\051, with Reserved Font Name CMTT10.) readonly def
! /FullName (CMTT10) readonly def
! /FamilyName (Computer Modern) readonly def
! /Weight (Medium) readonly def
! /ItalicAngle 0 def
! /isFixedPitch true def
! /UnderlinePosition -100 def
! /UnderlineThickness 50 def
! end readonly def
! /Encoding 256 array
! 0 1 255 {1 index exch /.notdef put} for
! dup 45 /hyphen put
! dup 46 /period put
! dup 47 /slash put
! dup 48 /zero put
! dup 49 /one put
! dup 50 /two put
! dup 51 /three put
! dup 58 /colon put
! dup 68 /D put
! dup 70 /F put
! dup 76 /L put
! dup 95 /underscore put
! dup 97 /a put
! dup 98 /b put
! dup 99 /c put
! dup 100 /d put
! dup 101 /e put
! dup 102 /f put
! dup 103 /g put
! dup 104 /h put
! dup 105 /i put
! dup 106 /j put
! dup 108 /l put
! dup 109 /m put
! dup 110 /n put
! dup 111 /o put
! dup 112 /p put
! dup 113 /q put
! dup 114 /r put
! dup 115 /s put
! dup 116 /t put
! dup 117 /u put
! dup 118 /v put
! dup 119 /w put
! dup 120 /x put
! dup 121 /y put
! readonly def
! currentdict end
! currentfile eexec
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! cleartomark
! {restore}if
! %%EndFont 
! %%BeginFont: manfnt
! %!PS-AdobeFont-1.0: manfnt 1.0
! %%CreationDate: Thu Jul 30 15:00:55 1998
! %%VMusage: 120000 150000
! 11 dict begin
! /FontInfo 14 dict dup begin
! /version (1.0) readonly def
! /Notice (Copyright 1998 Taco Hoekwater) readonly def
! /FullName (manfnt) readonly def
! /FamilyName (manfnt) readonly def
! /ItalicAngle 0 def
! /isFixedPitch false def
! /UnderlinePosition -100 def
! /UnderlineThickness 50 def
! /Weight (Medium) readonly def
! end readonly def
! /FontName /manfnt def
! /Encoding 256 array
! 0 1 255 {1 index exch /.notdef put} for
! dup 65 /char41 put
! dup 69 /char45 put
! dup 70 /char46 put
! dup 77 /char4d put
! dup 78 /char4e put
! dup 79 /char4f put
! dup 84 /char54 put
! readonly def
! /PaintType 0 def
! /FontType 1 def
! /FontMatrix [0.001 0 0 0.001 0 0] readonly def
! /FontBBox {-500 -1100 2728 2822} readonly def
! currentdict end
! currentfile eexec
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! cleartomark
! %%EndFont 
! %%BeginFont: CMR7
! %!PS-AdobeFont-1.0: CMR7 003.002
! %%Title: CMR7
! %Version: 003.002
! %%CreationDate: Mon Jul 13 16:17:00 2009
! %%Creator: David M. Jones
! %Copyright: Copyright (c) 1997, 2009 American Mathematical Society
! %Copyright: (<http://www.ams.org>), with Reserved Font Name CMR7.
! % This Font Software is licensed under the SIL Open Font License, Version 1.1.
! % This license is in the accompanying file OFL.txt, and is also
! % available with a FAQ at: http://scripts.sil.org/OFL.
! %%EndComments
! FontDirectory/CMR7 known{/CMR7 findfont dup/UniqueID known{dup
! /UniqueID get 5000790 eq exch/FontType get 1 eq and}{pop false}ifelse
! {save true}{false}ifelse}{false}ifelse
! 11 dict begin
! /FontType 1 def
! /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def
! /FontName /CMR7 def
! /FontBBox {-27 -250 1122 750 }readonly def
! /UniqueID 5000790 def
! /PaintType 0 def
! /FontInfo 9 dict dup begin
! /version (003.002) readonly def
! /Notice (Copyright \050c\051 1997, 2009 American Mathematical Society \050<http://www.ams.org>\051, with Reserved Font Name CMR7.) readonly def
! /FullName (CMR7) readonly def
! /FamilyName (Computer Modern) readonly def
! /Weight (Medium) readonly def
! /ItalicAngle 0 def
! /isFixedPitch false def
! /UnderlinePosition -100 def
! /UnderlineThickness 50 def
! end readonly def
! /Encoding 256 array
! 0 1 255 {1 index exch /.notdef put} for
! dup 43 /plus put
! readonly def
! currentdict end
! currentfile eexec
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+ %Copyright: Copyright (c) 1997, 2009 American Mathematical Society
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+ cleartomark
+ {restore}if
+ %%EndFont 
+ %%BeginFont: CMTT10
+ %!PS-AdobeFont-1.0: CMTT10 003.002
+ %%Title: CMTT10
+ %Version: 003.002
+ %%CreationDate: Mon Jul 13 16:17:00 2009
+ %%Creator: David M. Jones
+ %Copyright: Copyright (c) 1997, 2009 American Mathematical Society
+ %Copyright: (<http://www.ams.org>), with Reserved Font Name CMTT10.
+ % This Font Software is licensed under the SIL Open Font License, Version 1.1.
+ % This license is in the accompanying file OFL.txt, and is also
+ % available with a FAQ at: http://scripts.sil.org/OFL.
+ %%EndComments
+ FontDirectory/CMTT10 known{/CMTT10 findfont dup/UniqueID known{dup
+ /UniqueID get 5000832 eq exch/FontType get 1 eq and}{pop false}ifelse
+ {save true}{false}ifelse}{false}ifelse
+ 11 dict begin
+ /FontType 1 def
+ /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def
+ /FontName /CMTT10 def
+ /FontBBox {-4 -233 537 696 }readonly def
+ /UniqueID 5000832 def
+ /PaintType 0 def
+ /FontInfo 9 dict dup begin
+ /version (003.002) readonly def
+ /Notice (Copyright \050c\051 1997, 2009 American Mathematical Society \050<http://www.ams.org>\051, with Reserved Font Name CMTT10.) readonly def
+ /FullName (CMTT10) readonly def
+ /FamilyName (Computer Modern) readonly def
+ /Weight (Medium) readonly def
+ /ItalicAngle 0 def
+ /isFixedPitch true def
+ /UnderlinePosition -100 def
+ /UnderlineThickness 50 def
+ end readonly def
+ /Encoding 256 array
+ 0 1 255 {1 index exch /.notdef put} for
+ dup 45 /hyphen put
+ dup 46 /period put
+ dup 47 /slash put
+ dup 48 /zero put
+ dup 49 /one put
+ dup 50 /two put
+ dup 51 /three put
+ dup 58 /colon put
+ dup 68 /D put
+ dup 70 /F put
+ dup 76 /L put
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+ dup 116 /t put
+ dup 117 /u put
+ dup 118 /v put
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+ dup 120 /x put
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+ readonly def
+ currentdict end
+ currentfile eexec
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+ cleartomark
+ {restore}if
+ %%EndFont 
+ %%BeginFont: manfnt
+ %!PS-AdobeFont-1.0: manfnt 1.0
+ %%CreationDate: Thu Jul 30 15:00:55 1998
+ %%VMusage: 120000 150000
+ 11 dict begin
+ /FontInfo 14 dict dup begin
+ /version (1.0) readonly def
+ /Notice (Copyright 1998 Taco Hoekwater) readonly def
+ /FullName (manfnt) readonly def
+ /FamilyName (manfnt) readonly def
+ /ItalicAngle 0 def
+ /isFixedPitch false def
+ /UnderlinePosition -100 def
+ /UnderlineThickness 50 def
+ /Weight (Medium) readonly def
+ end readonly def
+ /FontName /manfnt def
+ /Encoding 256 array
+ 0 1 255 {1 index exch /.notdef put} for
+ dup 65 /char41 put
+ dup 69 /char45 put
+ dup 70 /char46 put
+ dup 77 /char4d put
+ dup 78 /char4e put
+ dup 79 /char4f put
+ dup 84 /char54 put
+ readonly def
+ /PaintType 0 def
+ /FontType 1 def
+ /FontMatrix [0.001 0 0 0.001 0 0] readonly def
+ /FontBBox {-500 -1100 2728 2822} readonly def
+ currentdict end
+ currentfile eexec
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+ cleartomark
+ %%EndFont 
+ %%BeginFont: CMR7
+ %!PS-AdobeFont-1.0: CMR7 003.002
+ %%Title: CMR7
+ %Version: 003.002
+ %%CreationDate: Mon Jul 13 16:17:00 2009
+ %%Creator: David M. Jones
+ %Copyright: Copyright (c) 1997, 2009 American Mathematical Society
+ %Copyright: (<http://www.ams.org>), with Reserved Font Name CMR7.
+ % This Font Software is licensed under the SIL Open Font License, Version 1.1.
+ % This license is in the accompanying file OFL.txt, and is also
+ % available with a FAQ at: http://scripts.sil.org/OFL.
+ %%EndComments
+ FontDirectory/CMR7 known{/CMR7 findfont dup/UniqueID known{dup
+ /UniqueID get 5000790 eq exch/FontType get 1 eq and}{pop false}ifelse
+ {save true}{false}ifelse}{false}ifelse
+ 11 dict begin
+ /FontType 1 def
+ /FontMatrix [0.001 0 0 0.001 0 0 ]readonly def
+ /FontName /CMR7 def
+ /FontBBox {-27 -250 1122 750 }readonly def
+ /UniqueID 5000790 def
+ /PaintType 0 def
+ /FontInfo 9 dict dup begin
+ /version (003.002) readonly def
+ /Notice (Copyright \050c\051 1997, 2009 American Mathematical Society \050<http://www.ams.org>\051, with Reserved Font Name CMR7.) readonly def
+ /FullName (CMR7) readonly def
+ /FamilyName (Computer Modern) readonly def
+ /Weight (Medium) readonly def
+ /ItalicAngle 0 def
+ /isFixedPitch false def
+ /UnderlinePosition -100 def
+ /UnderlineThickness 50 def
+ end readonly def
+ /Encoding 256 array
+ 0 1 255 {1 index exch /.notdef put} for
+ dup 43 /plus put
+ readonly def
+ currentdict end
+ currentfile eexec
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--- 6003,6024 ----
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***************
*** 6030,6035 ****
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--- 6030,6035 ----
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***************
*** 6037,6041 ****
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--- 6037,6041 ----
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***************
*** 6066,6070 ****
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--- 6066,6070 ----
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***************
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***************
*** 6594,6598 ****
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  3617 y(the)i(General)h(Public)f(License.)41 b(Of)30 b(course,)h(y)m
--- 7586,7590 ----
  (redistribute)j(it)390 3373 y(under)e(certain)h(conditions;)h(type)e
  (`show)g(c')g(for)g(details.)275 3508 y Fq(The)27 b(h)m(yp)s(othetical)
! i(commands)f(`)p Fg(show)h(w)p Fq(')f(and)f(`)p Fg(show)j(c)p
  Fq(')d(should)g(sho)m(w)h(the)g(appropriate)g(parts)g(of)150
  3617 y(the)i(General)h(Public)f(License.)41 b(Of)30 b(course,)h(y)m
***************
*** 7597,7601 ****
  h(program,)g(if)f(necessary)-8 b(.)48 b(F)-8 b(or)34
  b(more)e(information)h(on)g(this,)150 4081 y(and)d(ho)m(w)g(to)h(apply)
! f(and)g(follo)m(w)i(the)e(GNU)h(GPL,)g(see)g Ff
  (http://www.gnu.org/licen)o(ses)o(/)p Fq(.)275 4215 y(The)44
  b(GNU)h(General)g(Public)f(License)i(do)s(es)e(not)h(p)s(ermit)e
--- 7597,7601 ----
  h(program,)g(if)f(necessary)-8 b(.)48 b(F)-8 b(or)34
  b(more)e(information)h(on)g(this,)150 4081 y(and)d(ho)m(w)g(to)h(apply)
! f(and)g(follo)m(w)i(the)e(GNU)h(GPL,)g(see)g Fg
  (http://www.gnu.org/licen)o(ses)o(/)p Fq(.)275 4215 y(The)44
  b(GNU)h(General)g(Public)f(License)i(do)s(es)e(not)h(p)s(ermit)e
***************
*** 7608,7612 ****
  (the)g(GNU)h(Lesser)g(General)g(Public)f(License)h(instead)g(of)f(this)
  h(License.)40 b(But)30 b(\014rst,)f(please)150 4653 y(read)h
! Ff(http://www.gnu.org/philos)o(ophy)o(/why)o(-no)o(t-lg)o(pl.h)o(tml)o
  Fq(.)p eop end
  %%Page: 27 31
--- 7608,7612 ----
  (the)g(GNU)h(Lesser)g(General)g(Public)f(License)h(instead)g(of)f(this)
  h(License.)40 b(But)30 b(\014rst,)f(please)150 4653 y(read)h
! Fg(http://www.gnu.org/philos)o(ophy)o(/why)o(-no)o(t-lg)o(pl.h)o(tml)o
  Fq(.)p eop end
  %%Page: 27 31
diff -rc2P 3DLDF-2.0.2/doc/3dldf.texi 3DLDF-2.0.3/doc/3dldf.texi
*** 3DLDF-2.0.2/doc/3dldf.texi	Wed Nov  6 16:00:14 2013
--- 3DLDF-2.0.3/doc/3dldf.texi	Fri Dec 13 16:38:27 2013
***************
*** 7,22 ****
  %%%% fdl.texi for copying conditions.
  
  \input epsf 
! \def\epsfsize#1#2{#1}
  
  \newbox\PPbox % symbol for ++
! \setbox\PPbox=\hbox{\kern.5pt\raise1pt\hbox{\sevenrm+\kern-1pt+}\kern.5pt}
! \def\PP{\copy\PPbox}
! \let\mc=\tenrm
! \def\CPLUSPLUS{{\mc C\PP\spacefactor1000}}
  
- \font\manual=manfnt % font used for the METAFONT logo, etc.
  
- \input texinfo   @c -*-texinfo-*-
  
  @c %**start of header
--- 7,28 ----
  %%%% fdl.texi for copying conditions.
  
+ \input texinfo   @c -*-texinfo-*-
+ 
+ @iftex
+ @tex
  \input epsf 
! \global\def\epsfsize#1#2{#1}
  
  \newbox\PPbox % symbol for ++
! \global\setbox\PPbox=\hbox{\kern.5pt\raise1pt\hbox{\sevenrm+\kern-1pt+}\kern.5pt}
! \global\def\PP{\copy\PPbox}
! \global\let\mc=\tenrm
! \global\def\CPLUSPLUS{{\mc C\PP\spacefactor1000}}
! \global\font\manual=manfnt % font used for the METAFONT logo, etc.
! @end tex
! @end iftex
! 
  
  
  
  @c %**start of header
***************
*** 146,172 ****
  @end menu
  
- 
- @macro cpp {}
  @iftex
  @tex
  @CPLUSPLUS
  @end tex
  @end iftex
  @ifnottex
  C++
- @end ifnottex
  @end macro
  
- 
- @macro MF {}
  @iftex
  @tex
  {@manual METAFONT}
  @end tex
  @end iftex
  @ifnottex
  METAFONT
- @end ifnottex
  @end macro
  
  @macro MP {}
--- 152,182 ----
  @end menu
  
  @iftex
+ @macro cpp {}
  @tex
  @CPLUSPLUS
  @end tex
+ @end macro
  @end iftex
+ 
  @ifnottex
+ @macro cpp {}
  C++
  @end macro
+ @end ifnottex
  
  @iftex
+ @macro MF {}
  @tex
  {@manual METAFONT}
  @end tex
+ @end macro
  @end iftex
+ 
  @ifnottex
+ @macro MF {}
  METAFONT
  @end macro
+ @end ifnottex
  
  @macro MP {}
diff -rc2P 3DLDF-2.0.2/doc/Makefile.am 3DLDF-2.0.3/doc/Makefile.am
*** 3DLDF-2.0.2/doc/Makefile.am	Thu Nov  7 15:08:25 2013
--- 3DLDF-2.0.3/doc/Makefile.am	Wed Nov 13 13:11:23 2013
***************
*** 59,63 ****
                     invoking.texi varidx.texi
  
! EXTRA_DIST = 3dldf.ps 3dldf.pdf 3dldf.dvi 3dldf.html 3dldf.info $(SOURCES_MANUAL) 
  
  all: 3dldf.dvi 3dldf.ps 3dldf.pdf 3dldf.info 3dldf.html html-split
--- 59,63 ----
                     invoking.texi varidx.texi
  
! EXTRA_DIST = 3dldf.ps 3dldf.pdf 3dldf.dvi 3dldf.html 3dldf.info $(SOURCES_MANUAL) texinfo.tex
  
  all: 3dldf.dvi 3dldf.ps 3dldf.pdf 3dldf.info 3dldf.html html-split
***************
*** 98,105 ****
  	makeinfo --html --no-split 3dldf.texi
  
! .PHONY: html-split
  
  html-split: $(SOURCES_MANUAL)
  	makeinfo --html 3dldf.texi
  
  #### ** (2) Tags
--- 98,106 ----
  	makeinfo --html --no-split 3dldf.texi
  
! #### .PHONY: html-split
  
  html-split: $(SOURCES_MANUAL)
  	makeinfo --html 3dldf.texi
+ 	touch html-split
  
  #### ** (2) Tags
diff -rc2P 3DLDF-2.0.2/doc/Makefile.in 3DLDF-2.0.3/doc/Makefile.in
*** 3DLDF-2.0.2/doc/Makefile.in	Sun Nov 10 18:30:13 2013
--- 3DLDF-2.0.3/doc/Makefile.in	Fri Dec 13 12:29:28 2013
***************
*** 132,136 ****
  host_triplet = @host@
  subdir = doc
! DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am
  ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
  am__aclocal_m4_deps = $(top_srcdir)/m4/libtool.m4 \
--- 132,136 ----
  host_triplet = @host@
  subdir = doc
! DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am texinfo.tex
  ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
  am__aclocal_m4_deps = $(top_srcdir)/m4/libtool.m4 \
***************
*** 299,303 ****
                     invoking.texi varidx.texi
  
! EXTRA_DIST = 3dldf.ps 3dldf.pdf 3dldf.dvi 3dldf.html 3dldf.info $(SOURCES_MANUAL) 
  all: all-am
  
--- 299,303 ----
                     invoking.texi varidx.texi
  
! EXTRA_DIST = 3dldf.ps 3dldf.pdf 3dldf.dvi 3dldf.html 3dldf.info $(SOURCES_MANUAL) texinfo.tex
  all: all-am
  
***************
*** 518,525 ****
  	makeinfo --html --no-split 3dldf.texi
  
! .PHONY: html-split
  
  html-split: $(SOURCES_MANUAL)
  	makeinfo --html 3dldf.texi
  
  #### ** (2) Tags
--- 518,526 ----
  	makeinfo --html --no-split 3dldf.texi
  
! #### .PHONY: html-split
  
  html-split: $(SOURCES_MANUAL)
  	makeinfo --html 3dldf.texi
+ 	touch html-split
  
  #### ** (2) Tags
diff -rc2P 3DLDF-2.0.2/doc/dttypes.texi 3DLDF-2.0.3/doc/dttypes.texi
*** 3DLDF-2.0.2/doc/dttypes.texi	Wed Nov  6 17:26:14 2013
--- 3DLDF-2.0.3/doc/dttypes.texi	Wed Nov 13 12:29:06 2013
***************
*** 51,55 ****
  Focus for the @dfn{perspective projection}.
  
! @itemx pen
  
  @itemx dash_pattern
--- 51,55 ----
  Focus for the @dfn{perspective projection}.
  
! @item pen
  
  @itemx dash_pattern
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/About-This-Manual.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/About-This-Manual.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/About-This-Manual.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/About-This-Manual.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,132 ----
+ <html lang="en">
+ <head>
+ <title>About This Manual - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="Sources-of-Information.html#Sources-of-Information" title="Sources of Information">
+ <link rel="next" href="CWEB-Documentation.html#CWEB-Documentation" title="CWEB Documentation">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="About-This-Manual"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="CWEB-Documentation.html#CWEB-Documentation">CWEB Documentation</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.2 About This Manual</h3>
+ 
+ <p>This manual has been created using
+ Texinfo, a documentation system which is part of the GNU Project, whose
+ main sponsor is the Free Software Foundation. 
+ Texinfo can be used to generate online and printed documentation from
+ the same input files.
+ 
+    <p>For more information about Texinfo, see:
+ 
+    <pre class="sp">
+ 
+ </pre>
+ 
+ Stallmann, Richard M. and Robert J. Chassell. 
+ <i>Texinfo.  The GNU Documentation Format</i>. 
+ The Free Software Foundation. Boston 1999.
+    <pre class="sp">
+ 
+ </pre>
+ 
+    <p>For more information about the GNU Project and the Free Software
+ Foundation, see the following web site: <a href="http://www.gnu.org">http://www.gnu.org</a>.
+ 
+    <p>The edition of this manual is
+ 1.1.5.1 and it documents version 1.1.5.1 of 3DLDF. 
+ The edition number of the manual and the version number of the program
+ are the same (as of 16 January 2004),
+ but may diverge at a later date.
+ 
+    <p>Note that &ldquo;I&rdquo;, &ldquo;me&rdquo;, etc., in this manual refers to
+ Laurence D. Finston, so far the sole author of
+ both 3DLDF and this manual.  &ldquo;Currently&rdquo; and similar formulations
+ refer to version 1.1.5.1 of 3DLDF as of
+ 16 January 2004.
+ 
+    <p>This manual is intended for both beginning and advanced users of 3DLDF. 
+ So, if there's something you don't understand, it's probably best to
+ skip it and come back to it later. 
+ Some of the more difficult points, or ones that presuppose familiarity
+ with features not yet described, are in the footnotes. 
+ <!-- Others are in -->
+ <!-- paragraphs marked by a ``dangerous bend'' sign, familiar from -->
+ <!-- @cite{The @TeX{}book} and  @cite{The Metafont{}book}, which I've -->
+ <!-- borrowed from Prof.@: Knuth: -->
+ <!-- @tex -->
+ <!-- \vrule height 14pt depth 8pt width 0pt\raise5pt\hbox{\dbend} -->
+ <!-- @end tex -->
+ 
+    <p>I firmly believe that an adequate program with good documentation is
+ more useful than a great program with poor or no documentation.  The
+ ideal case, of course, is a great program with great documentation.  I'm
+ sorry to say, that this manual is not yet as good as I'd like it to be. 
+ I apologize for the number of typos and other errors.  I hope they don't
+ detract too much from its usefulness.  I would have liked to have
+ proofread and corrected it again before publication, but for reasons
+ external to 3DLDF, it is necessary for me to publish now.  I plan to set
+ up an errata list on
+ <a href="http://www.gnu.org/software/3dldf">the official 3DLDF website</a>,
+ and/or
+ <a href="http://wwwuser.gwdg.de/~lfinsto1">my own website</a>.
+ 
+    <p>Unless I've left anything out by mistake, this manual documents all of
+ the data types, constants and variables, namespaces, and functions
+ defined in 3DLDF.  However, some of the descriptions are terser than I
+ would like, and I'd like to have more examples and illustrations. There
+ is also more to be said on a number of topics touched on in this
+ manual, and some topics I haven't touched on at all.  In general, while
+ I've tried to give complete information on the &ldquo;what and how&rdquo;, the
+ &ldquo;why and wherefore&rdquo; has sometimes gotten short shrift. 
+ I hope to correct these defects in future editions.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a>
+ <li><a accesskey="2" href="Illustrations.html#Illustrations">Illustrations</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Accuracy.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Accuracy.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Accuracy.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Accuracy.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,107 ----
+ <html lang="en">
+ <head>
+ <title>Accuracy - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Caveats.html#Caveats" title="Caveats">
+ <link rel="prev" href="Caveats.html#Caveats" title="Caveats">
+ <link rel="next" href="No-Input-Routine.html#No-Input-Routine" title="No Input Routine">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Accuracy"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="No-Input-Routine.html#No-Input-Routine">No Input Routine</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Caveats.html#Caveats">Caveats</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Caveats.html#Caveats">Caveats</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">1.5.1 Accuracy</h4>
+ 
+ <p>When 3DLDF is run, it uses the three-dimensional data contained in the
+ user code to create a two-dimensional projection. 
+ Currently, this can be a perspective projection, or a parallel
+ projection onto one of the major planes.  MetaPost code representing
+ this projection is then written to the output file. 
+ 3DLDF does no <dfn>scan conversion</dfn>,<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ so all of the curves in the projection are
+ generated by means of the algorithms MetaPost inherited from Metafont. 
+ These algorithms, however, are designed to find the
+ &ldquo;most pleasing curve&rdquo;<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ given one or more two-dimensional points and connectors;  they do not
+ account for the the fact that the two-dimensional points are projections
+ of three-dimensional ones.  This can lead to unsatisfactory results,
+ especially where extreme foreshortening occurs.  In particular,
+ &lsquo;<samp><span class="samp">curl</span></samp>&rsquo;, <code>dir</code>, &lsquo;<samp><span class="samp">tension</span></samp>&rsquo;, and control points should be
+ used cautiously, or avoided altogether, when specifying connectors.
+ 
+    <p>3DLDF operates on
+ the assumption  that, given  an  adequate  number  of  points,
+ MetaPost will produce an adequate approximation to the desired
+ curve <em>in perspective</em>, since the greater the number of
+ points given for a curve, the less &ldquo;choice&rdquo; MetaPost has for
+ the path  through them.   My  experience with 3DLDF bears this
+ out.   Generally, the curves look quite good.  Where problems arise,
+ it usually helps to increase the number of points in a curve.
+ 
+    <p>A more serious problem is the imprecision resulting from the operation
+ of rotation.  Rotations use the trigonometric functions, which return
+ approximate values.  This has the result that points that should have
+ identical coordinate values, sometimes do not. 
+ This has consequences for the functions that compare points. 
+ The more rotations
+ are applied to points, the greater the divergence between their actual
+ coordinate values, and the values they should have.  So far, I haven't
+ found a solution for this problem.  On the other hand, it hasn't
+ yet affected the usability of 3DLDF.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <dfn>Scan conversion</dfn> is the process of digitizing geometric
+ data.  The ultimate result is a
+ 2 X 2
+ map of pixels, which can be used for printing or representing the projection on a
+ computer screen.  The number of pixels per a given unit of measurement
+ is the <dfn>resolution</dfn> of a given output device, e.g., 300 pixels per inch.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 14, p. 127.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Adding-a-File.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Adding-a-File.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Adding-a-File.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Adding-a-File.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,168 ----
+ <html lang="en">
+ <head>
+ <title>Adding a File - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Utility-Functions.html#Utility-Functions" title="Utility Functions">
+ <link rel="next" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Adding-a-File"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Future-Plans.html#Future-Plans">Future Plans</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Utility-Functions.html#Utility-Functions">Utility Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">39 Adding a File</h2>
+ 
+ <p>Version 1.1.1 was the first version of 3DLDF since it became a GNU
+ package (the current version is 1.1.5.1).  In previous versions,
+ recompilation was controlled by an
+ auxilliary program, which I wrote in C++
+  using CWEB.  However,
+ in the course of making 3DLDF conformant to the
+ GNU Coding Standards<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>,
+ this has
+ been changed.  Recompilation is now controlled by <samp><span class="command">make</span></samp>, as is
+ customary.  The chapter &ldquo;Compiling&rdquo; in previous editions of this
+ manual, is therefore no longer needed.
+ 
+    <p>Nonetheless, using CWEB still has consequences for the way recompilation
+ must be handled, and it was fairly tricky getting <samp><span class="command">make</span></samp> to work
+ for 3DLDF.  Users who only put code in <samp><span class="file">main.web</span></samp> and/or change
+ code in existing files won't have to worry about this;
+ for others, this chapter explains how to add
+ files to 3DLDF.
+ 
+    <p>Let's say you want to add a file <samp><span class="file">widgets.web</span></samp> that defines a
+ <code>class Widget</code>, and that the latter needs access to
+ <code>class Rectangle</code>, and is in turn required by <code>class Ellipse</code>. 
+ Code must be added to <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile</span></samp> for
+ ctangling <samp><span class="file">widgets.web</span></samp>, compiling <samp><span class="file">widgets.cxx</span></samp>, and linking
+ <samp><span class="file">widgets.o</span></samp> with the other object files to make the executable
+ <samp><span class="file">3dldf</span></samp>.
+ 
+    <p>The best way to do this is to change
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile.am</span></samp> and use Automake
+ to generate a new <samp><span class="file">Makefile.in</span></samp>.  Then, <samp><span class="command">configure</span></samp> can be
+ used to generate a new <samp><span class="file">Makefile</span></samp>.  It would be possible to modify
+ <samp><span class="file">Makefile</span></samp> by hand, but I don't recommend it.  The following
+ assumes that the user has access to Automake.  If he or she is using a
+ GNU/Linux system, this is probably true.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+    <p>&lsquo;<samp><span class="samp">widgets.web</span></samp>&rsquo; must be added between &lsquo;<samp><span class="samp">rectangs.web</span></samp>&rsquo; and
+ &lsquo;<samp><span class="samp">ellipses.web</span></samp>&rsquo; in the following variable declaration in
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile.am</span></samp>:
+ 
+ <pre class="example">     3dldf_SOME_CWEBS = pspglb.web io.web colors.web transfor.web \
+                         shapes.web pictures.web points.web \
+                         lines.web planes.web paths.web curves.web \
+                         polygons.web rectangs.web ellipses.web \
+                         circles.web patterns.web solids.web
+                         solfaced.web cuboid.web polyhed.web \
+                         utility.web parser.web examples.web
+ </pre>
+    <p>Now, add &lsquo;<samp><span class="samp">widgets.o</span></samp>&rsquo; between &lsquo;<samp><span class="samp">ellipses.o</span></samp>&rsquo; and
+ &lsquo;<samp><span class="samp">rectangs.o</span></samp>&rsquo; in the following variable declaration:
+ 
+ <pre class="example">     3dldf_OBS_REVERSED = main.o examples.o parser.o utility.o \
+                           polyhed.o cuboid.o  solfaced.o solids.o \
+                           patterns.o circles.o ellipses.o rectangs.o \
+                           polygons.o curves.o paths.o \
+                           planes.o lines.o points.o pictures.o shapes.o
+                           transfor.o colors.o io.o pspglb.o
+ </pre>
+    <p><code>3dldf_OBS_REVERSED</code> is needed, because 3DLDF fails with
+ a &ldquo;Segmentation fault&rdquo;, if
+ the executable is linked using <code>$(3dldf_OBJECTS)</code>.  This may cause
+ problems, if <samp><span class="file">3dldf</span></samp> isn't built using the GNU C++
+  compiler
+ (GCC).
+ 
+    <p>Now add a target for <samp><span class="file">widgets.o</span></samp> between the targets for
+ <samp><span class="file">rectangs.o</span></samp> and <samp><span class="file">ellipses.o</span></samp>, and add <samp><span class="file">widgets.tim</span></samp>
+ after <samp><span class="file">rectangs.tim</span></samp> in the list of prerequisites for
+ <samp><span class="file">ellipses.o</span></samp>:
+ 
+ <pre class="example">     rectangs.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.cxx
+      
+      ellipses.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim ellipses.cxx
+ </pre>
+    <p>This is the result:
+ <pre class="example">     rectangs.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.cxx
+      
+      widgets.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim \
+               widgets.cxx
+      
+      ellipses.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim widgets.tim \
+               ellipses.cxx
+ </pre>
+    <p>In addition, <samp><span class="file">widgets.tim</span></samp>
+ must be added to the list of prerequisites in all of the following
+ targets up to and including <samp><span class="file">examples.o</span></samp>.
+ 
+ <!-- This is ~/metafont/metapost/perspective/DOCUMENTATION/future.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> The GNU Coding Standards are available at
+ <a href="http://www.gnu.org/prep/standards_toc.html">http://www.gnu.org/prep/standards_toc.html</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Automake is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/automake/">http://ftp.gnu.org/gnu/automake/</a>.  The Automake website is at
+ <a href="http://www.gnu.org/software/automake/">http://www.gnu.org/software/automake/</a>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Ellipses.html
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***************
*** 0 ****
--- 1,92 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Labeling-Ellipses.html#Labeling-Ellipses" title="Labeling Ellipses">
+ <link rel="next" href="Querying-Ellipses.html#Querying-Ellipses" title="Querying Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.6 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-725"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-726"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-727"></a></var><br>
+ &mdash; Virtual function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-728"></a></var><br>
+ &mdash; Virtual function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-729"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-730"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-731"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-732"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-733"></a></var><br>
+ <blockquote><p>These create a <code>Transform</code> <var>t</var> locally, and call
+ <code>do_transform(t)</code>. 
+ See <a href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Ellipse Reference; Performing Transformations</a>.
+ 
+         <p>Rotating and shifting an <code>Ellipse</code> neither change the size of an
+ <code>Ellipse</code>, nor cause it to become
+ non-elliptical.  However, scaling and shearing can have these effects. 
+ For this reason, in <code>scale()</code> and <code>shear()</code>,
+ <code>do_transform()</code> is called with <code>true</code> as its <var>check</var>
+ argument, while it is <code>false</code> in <code>rotate()</code>, <code>shift()</code>,
+ and <code>shift_times()</code>.
+ 
+         <p>If scaling or shearing is performed on an <code>Ellipse</code>, and it is
+ still elliptical after the transformation, <code>focus0</code>, <code>focus1</code>,
+ <code>axis_h</code>, <code>axis_v</code>, <code>linear_eccentricity</code>, and
+ <code>numerical_eccentricity</code> are all
+ recalculated.  If the <code>Ellipse</code> is non-elliptical after the
+ transformation, <code>axis_h</code>, <code>axis_v</code>,
+ <code>linear_eccentricity</code>, and <code>numerical_eccentricity</code>
+ are all set to <code>INVALID_REAL</code>.  <code>center</code>, <code>focus0</code>, and
+ <code>focus1</code> are not set to <code>INVALID_POINT</code>.  Although they are no
+ longer the center and foci of an elliptical <code>Ellipse</code>, they may
+ still have some use for the user or programmer. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Paths.html
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*** 0 ****
--- 1,245 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Modifying-Paths.html#Modifying-Paths" title="Modifying Paths">
+ <link rel="next" href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis" title="Aligning Paths with an Axis">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.9 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-572"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.rotate(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-573"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>The <code>Points</code> on the <code>Path</code> are scaled according to the
+ arguments:
+ 
+      <pre class="example">          Point pt[8];
+           pt[0] = (-1, -1);
+           for (int i = 1; i &lt; 8; ++i)
+             {
+               pt[i] = pt[0];
+               pt[i].rotate(0, 0, i * 45);
+             }
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3],
+                  &amp;pt[4], &amp;pt[5], &amp;pt[6],
+                  &amp;pt[7], 0);
+           p.draw();
+           p.scale(2, 2);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF115.png"
+ alt="[Figure 115. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 115. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-574"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shear(</code><var>xy</var><code>, </code><var>xz</var><code>, </code><var>yx</var><code>, </code><var>yz</var><code>, </code><var>zx</var><code>, </code><var>zy</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+      <pre class="example">          Point p0;
+           Point p1(1);
+           Point p2(1, 1);
+           Point p3(0, 1);
+           Path q("--", true, &amp;p0, &amp;p1, &amp;p2, &amp;p3, 0);
+           q.rotate(0, 45);
+           q.shift(1);
+           q.filldraw(black, light_gray);
+           q.shear(1.5, 2, 2.5, 3, 3.5, 5);
+           q.filldraw(black, light_gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF116.png"
+ alt="[Figure 116. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 116. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-575"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shift(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>Shifts each of the <code>Points</code> on the <code>Path</code> according to the
+ arguments.
+ 
+      <pre class="example">          default_focus.set(5, 10, -10, 0, 10, 10, 10);
+           Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.draw();
+           p.shift(3, 3, 3);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF117.png"
+ alt="[Figure 117. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 117. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-576"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shift(</code><var>p</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>This version of <code>shift()</code> uses the x, y, and z-coordinates of the
+ <code>Point</code> <var>p</var> to shift the <code>Path</code>.
+ 
+      <pre class="example">          default_focus.set(5, 10, -10, 0, 10, 10, 10);
+           Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.draw();
+           Point s(1, 1, 1);
+           p.shift(s);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF118.png"
+ alt="[Figure 118. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 118. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-577"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-578"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Point::shift_times()</code> on all of the
+ <code>Points</code> on <code>points</code>. 
+ See <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ The return value is <code>void</code>,
+ because there is no guarantee that all of the <code>Points</code> on a
+ <code>Path</code> will have identical <code>transform</code> members (although it's
+ likely).
+ 
+         <p>Please note that <code>shift_times()</code> will only have an effect on
+ the <code>Points</code> on a <code>Path</code> if it's called <em>after</em> a call to
+ <code>shift()</code> and <em>before</em> an operation is applied that causes
+ <code>Point::apply_transform()</code> to be called. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-579"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.rotate(</code><var>p0</var><code>, </code><var>p1</var><code>, </code><var>angle</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-580"></a></var><br>
+ <blockquote><p>If <code>p.is_linear()</code> returns <code>true</code>, this function
+ creates a <code>Transform</code> <var>t</var> locally and calls
+ <var>t</var><code>.rotate(</code><var>p</var><code>, </code><var>angle</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ Otherwise, it issues an error message and returns
+ <code>INVALID_TRANSFORM</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Pictures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Pictures.html
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*** 0 ****
--- 1,98 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Pictures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Picture-Operators.html#Picture-Operators" title="Picture Operators">
+ <link rel="next" href="Modifying-Pictures.html#Modifying-Pictures" title="Modifying Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Pictures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Operators.html#Picture-Operators">Picture Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.5 Affine Transformations</h3>
+ 
+ <p>The functions in this section all operate on the <code>transform</code> data
+ member of the <code>Picture</code> and return a <code>Transform</code> representing the
+ transformation&mdash;<em>not</em> <code>transform</code>.
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-314"></a></var><br>
+ <blockquote><p>Performs <code>transform.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of scaling
+ all of the elements of <code>shapes</code> and <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-315"></a></var><br>
+ <blockquote><p>Performs <code>transform.shift(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of shifting
+ all of the <code>Shapes</code> and <code>Labels</code> on the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-316"></a></var><br>
+ <blockquote><p>Performs <code>transform.shift(</code><var>p</var><code>)</code> and returns
+ the result.  This has the effect of shifting
+ all of the <code>Shapes</code> and <code>Labels</code> on the <code>Picture</code> by the
+ x, y, and z-coordinates of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-317"></a></var><br>
+ <blockquote><p>Performs <code>transform.rotate(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of rotating
+ all of the elements of <code>shapes</code> and <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var>;<a name="index-rotate-318"></a></var><br>
+ <blockquote><p>Performs <code>transform.rotate(</code><var>p0</var><code>, </code><var>p1</var><code>, </code><var>angle</var><code>)</code> and returns
+ the result.  This has the effect of rotating
+ all of the elements of <code>shapes</code> and <code>labels</code> about the line
+ from p_0 to p_1. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Points.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,274 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Modifying-Points.html#Modifying-Points" title="Modifying Points">
+ <link rel="next" href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points" title="Applying Transformations to Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Applying Transformations to Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Points.html#Modifying-Points">Modifying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.12 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-415"></a></var><br>
+ &mdash; Function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-416"></a></var><br>
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-417"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::rotate()</code>, and returns its
+ return value, namely, a <code>Transform</code> representing the rotation
+ only.
+ 
+         <p>In the first version, taking three <code>real</code> arguments, the
+ <code>Point</code> is rotated <var>x</var> degrees around the x-axis, <var>y</var>
+ degrees around the y-axis, and <var>z</var> degrees around the z-axis in
+ that order.
+ 
+      <pre class="example">          Point p0(1, 0, 2);
+           p0.rotate(90);
+           p0.show("p0:")
+           -| p0: (1, 2, 0)
+           Point p1(-1, 1, 1);
+           p1.rotate(-90, 90, 90);
+           p1.show("pt1:");
+           -| p1: (1, -1, -1)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF81.png"
+ alt="[Figure 81. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 81. 
+ <br>
+ </p>
+ 
+         <p>Please note that rotations are not commutative operations.  Nor are they
+ commutative with other transformations. 
+ So, if you want to rotate a <code>Point</code> about the x, y and z-axes in
+ that order,
+ you can do so with a single invocation of <code>rotate()</code>, as in
+ the previous example. 
+ However, if you want to rotate a <code>Point</code> first about the
+ y-axis and then about the x-axis, you must invoke <code>rotate()</code> twice.
+ 
+      <pre class="example">          Point pt0(1, 1, 1);
+           pt0.rotate(0, 45);
+           pt0.rotate(45);
+           pt0.show("pt0:");
+           -| pt0: (0, 1.70711, 0.292893)
+ </pre>
+         <p>In the version taking two <code>Point</code> arguments <var>p0</var> and <var>p1</var>,
+ and a <code>real</code> argument <var>angle</var>, the <code>Point</code> is rotated
+ <code>angle</code> degrees around the axis determined
+ by <var>p0</var> and <var>p1</var>, 180 degrees
+  by default.
+ 
+      <pre class="example">          Point P(2, 0, 0);
+           Point A;
+           Point B(2, 2, 2);
+           P.rotate(A, B, 180);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF82.png"
+ alt="[Figure 82. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 82. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-418"></a></var><br>
+ <blockquote><p>Calls <code>transform.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns its
+ return value, namely, a <code>Transform</code> representing the scaling operation
+ only.
+ 
+         <p>Scaling causes the x-coordinate of the <code>Point</code> to be multiplied by
+ <var>x</var>, the y-coordinate of the <code>Point</code> to be multiplied by
+ <var>y</var>, and the z-coordinate of the <code>Point</code> to be multiplied by
+ <var>z</var>.
+ 
+      <pre class="example">          Point p0(1, 0, 3);
+           p0.scale(4);
+           p0.show("p0:");
+           -| p0: (4, 0, 3)
+           Point p1(-2, -1, -2);
+           p1.scale(-2, -3, -4);
+           p1.show("p1:");
+           -| p1: (4, 3, 8)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF83.png"
+ alt="[Figure 83. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 83. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-419"></a></var><br>
+ <blockquote><p>Calls <code>transform.shear()</code> with the same arguments
+ and returns its
+ return value, namely, a <code>Transform</code> representing the shearing operation
+ only.
+ 
+         <p>Shearing modifies each coordinate of a <code>Point</code>
+ proportionately to the values of the other two coordinates. 
+ Let x_0, y_0, and z_0 stand for the coordinates of
+ a <code>Point</code> P before <code>P.shear(</code>\alpha, \beta,
+ \gamma, \delta, \epsilon, \zeta
+ <code>)</code>,
+ and x_1, y_1, and z_1
+ for its coordinates afterwards.
+ 
+      <pre class="display">          x_1 == x_0 + \alpha y + \beta z
+           y_1 == y_0 + \gamma x + \delta z
+           z_1 == z_0 + \epsilon x + \zeta y
+ </pre>
+         <p>[next figure]
+  demonstrates the effect of shearing the four
+ <code>Points</code> of a
+ 3 * 3
+ 
+         <p><code>Rectangle</code> (i.e., a square) r in the x-y plane using only an
+ <var>xy</var> argument, making it non-rectangular.
+ 
+      <pre class="example">          Point P0;
+           Point P1(3);
+           Point P2(3, 3);
+           Point P3(0, 3);
+           Rectangle r(p0, p1, p2, p3);
+           r.draw();
+           r.shear(1.5);
+           r.draw(black, "evenly");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF84.png"
+ alt="[Figure 84. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 84. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-420"></a></var><br>
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-421"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::shift()</code> on <code>transform</code>, and returns its return
+ value, namely, a <code>Transform</code> representing the shifting operation
+ only.
+ 
+         <p>The <code>Point</code> is shifted <var>x</var> units in the direction of the
+ positive x-axis, <var>y</var> units in the direction of the
+ positive y-axis, and <var>z</var> units in the direction of the
+ positive z-axis.
+ 
+      <pre class="example">          p0(1, 2, 3);
+           p0.shift(2, 3, 5);
+           p0.show("p0:");
+           -| p0: (3, 5, 8)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-422"></a></var><br>
+ &mdash; Function: Transform <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-423"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::shift_times()</code> on <code>transform</code> and
+ returns its return value, namely the new value of <code>transform</code>.
+ 
+         <p><code>shift_times()</code> makes it possible to increase the magnitude of a
+ shift applied to a <code>Point</code>, while maintaining its direction. 
+ Please note that <code>shift_times()</code> will only have an effect
+ if it's called after a call to
+ <code>shift()</code> and before <code>transform</code> is reset. 
+ This is performed by <code>reset_transform()</code>, which is called in
+ <code>apply_transform()</code>, and can also be called directly. 
+ See <a href="Resetting-Transforms.html#Resetting-Transforms">Transform Reference; Resetting</a>, and
+ <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>.
+ 
+      <pre class="example">          Point P;
+           P.drawdot();
+           P.shift(1, 1, 1);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF85.png"
+ alt="[Figure 85. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 85. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Polygons.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Polygons.html
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*** 0 ****
--- 1,86 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Polygons - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="prev" href="Querying-Polygons.html#Querying-Polygons" title="Querying Polygons">
+ <link rel="next" href="Polygon-Intersections.html#Polygon-Intersections" title="Polygon Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Polygons"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Polygon-Intersections.html#Polygon-Intersections">Polygon Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Polygons.html#Querying-Polygons">Querying Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">27.4 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-641"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-642"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-643"></a></var><br>
+ &mdash; Virtual function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-644"></a></var><br>
+ &mdash; Virtual function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-645"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-646"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-647"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-648"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-649"></a></var><br>
+ <blockquote><p>The affine transformation functions for <code>Polygon</code> differ from the
+ <code>Path</code> versions only in that <code>center</code> is transformed as well. 
+ See <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Path Reference; Affine Transformations</a>.
+ 
+         <p>Please note, that the classes currently derived from <code>Polygon</code>,
+ namely <code>Reg_Polygon</code> and <code>Rectangle</code>, currently inherit these
+ functions from <code>Polygon</code>.  The problem with this is, that they have
+ data members, which are not recalculated when a <code>Reg_Polygon</code> or
+ <code>Rectangle</code> is transformed.  I plan to do something about this soon! 
+ It will also be necessary to add the function
+ <code>Reg_Polygon::is_reg_polygonal()</code>, in order to test whether operations
+ on a <code>Reg_Polygon</code> have caused it to become
+ irregular and/or non-polygonal.  Similarly, the function
+ <code>Rectangle::is_rectangular()</code> must be added, to test whether
+ operations on a <code>Rectangle</code> has caused it to become
+ non-rectangular. 
+ See <a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Reference; Data Members</a>, and <a href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Reference; Data Members</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Shapes.html
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Modifying-Shapes.html#Modifying-Shapes" title="Modifying Shapes">
+ <link rel="next" href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes" title="Applying Transformations to Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Shapes.html#Modifying-Shapes">Modifying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.5 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual functions: Transform <b>rotate</b> (<var>const real x, const real y, const real z</var>)<var><a name="index-rotate-244"></a></var><br>
+ &mdash; : Transform <b>scale</b> (<var>real x, real y, real z</var>)<var><a name="index-scale-245"></a></var><br>
+ &mdash; : Transform <b>shear</b> (<var>real xy, real xz, real yx, real yz, real zx, real zy</var>)<var><a name="index-shear-246"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>real x, real y, real z</var>)<var><a name="index-shift-247"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, const real r</var>)<var><a name="index-rotate-248"></a></var><br>
+ <blockquote><p>See <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Solids.html
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*** 0 ****
--- 1,71 ----
+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Showing-Solids.html#Showing-Solids" title="Showing Solids">
+ <link rel="next" href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids" title="Applying Transformations to Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Solids.html#Showing-Solids">Showing Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.10 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual functions: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-scale-812"></a></var><br>
+ <blockquote><p><code>Solid</code>.
+ 
+    &mdash; : Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-813"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-814"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>const Point&amp; pt</var>)<var><a name="index-shift-815"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-816"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-817"></a></var><br>
+ <blockquote><p>These functions perform the corresponding transformations on all of the
+ <code>Shapes</code> belonging to the <code>Solid</code>. 
+ See <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Transform Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Affine-Transformations-for-Transforms.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Affine Transformations for Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Showing-Transforms.html#Showing-Transforms" title="Showing Transforms">
+ <link rel="next" href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms" title="Alignment with an Axis for Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Affine-Transformations-for-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Transforms.html#Showing-Transforms">Showing Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.10 Affine Transformations</h3>
+ 
+ <p>The affine transformation functions use their arguments to create a new
+ <code>Transform</code> <code>t</code> (local to the function) representing the
+ appropriate transformation. Then, <code>*this</code> is multiplied by <code>t</code>
+ and <code>t</code> is returned. 
+ Returning <code>t</code> instead of <code>*this</code> makes it possible to put the
+ affine transformation function at the end of a chain of invocations of
+ <code>Transform::operator*=()</code>:
+ 
+ <pre class="example">     Transform t0, t1, t2, t3;
+      ...
+      t0 *= t1 *= t2 *= t3.scale(2, 3.5, 9);
+ </pre>
+    <p><code>t0</code>, <code>t1</code>, and <code>t2</code> are all multiplied by the
+ <code>Transform</code> with
+ <pre class="display">     <code>matrix</code> =
+      2   0    0  0
+      0   3.5  0  0
+      0   0    9  0
+      0   0    0  1
+ </pre>
+    <p>representing the scaling operation, <em>not</em> <code>t3</code>, which may
+ represent a combination of transformations.
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-282"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> representing the scaling operation locally,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>. 
+ A <code>Transform</code> representing scaling only, when applied to a
+ <code>Point p</code>, will cause its x-coordinate to be multiplied by
+ <var>x</var>, its y-coordinate to be multiplied by <var>y</var>, and its
+ z-coordinate to be multiplied by <var>z</var>.
+ 
+      <pre class="example">          <code>Transform t;</code>
+           <code>t.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>);</code>
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           x 0 0 0
+           0 y 0 0
+           0 0 z 0
+           0 0 0 1
+ </pre>
+         <pre class="example">          Transform t;
+           t.scale(12.5, 20, 1.3);
+           t.show("t:");
+           -| t:
+              12.5       0       0       0
+                 0      20       0       0
+                 0       0     1.3       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-283"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> representing the shearing operation locally,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>.
+ 
+         <p>When applied to a <code>Point</code>, shearing causes each coordinate to be
+ modified according to the values of the other coordinates and the
+ arguments to <code>shear</code>:
+ 
+      <pre class="example">          Point p(x,y,z);
+           Transform t;
+           t.shear(a, b, c, d, e, f);
+           p *= t;
+ </pre>
+         <pre class="display">          &rArr; p = ((x + ay + bz), (y + cx + dz), (z + ex + fy))
+ </pre>
+         <pre class="example">          Transform t;
+           t.shear(2, 3, 4, 5, 6, 7);
+           t.show("t:");
+           -| t:
+                 1       4       6       0
+                 2       1       7       0
+                 3       5       1       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-284"></a></var><br>
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-285"></a></var><br>
+ <blockquote>
+         <p>These functions create a <code>Transform t</code> representing the shifting
+ operation locally, multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>.
+ 
+         <p>The version with the argument <code>const Point&amp;</code> <var>p</var>
+ passes the updated x, y, and z-coordinates of <var>p</var> (from
+ <code>world_coordinates</code>) to the
+ version with three <code>real</code> arguments.
+ 
+         <p>When a <code>Transform</code> representing a single shifting operation only
+ is applied to a <code>Point</code>, the <var>x</var>,
+ <var>y</var>, and <var>z</var> arguments are added to the corresponding
+ coordinates of the <code>Point</code>:
+ 
+      <pre class="example">          Point p(x,y,z);
+           Transform t;
+           t.shift(a, b, c);
+           p *= t;
+ </pre>
+         <pre class="display">          &rArr; p = (x + a, y + b, z + c)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-286"></a></var><br>
+ <blockquote><p>Multiplies the corresponding elements of <code>matrix</code> by
+ the <code>real</code> arguments, i.e.,
+ <code>matrix[3][0]</code> is multiplied by <var>x</var>,
+ <code>matrix[3][1]</code> is multiplied by <var>y</var>, and
+ <code>matrix[3][2]</code> is multiplied by <var>z</var>.  Returns <code>*this</code>.
+ 
+         <p>Ordinary shifting is additive, so a special function is needed to
+ multiply the elements of <code>matrix</code> responsible for shifting. 
+ The effect of <code>shift_times()</code> is to modify a <code>Transform</code>
+ representing a shifting operation such that the direction of the shift
+ is maintained, while changing the distance.
+ 
+         <p>If the <code>Transform</code> represents other operations in addition to
+ shifting, e.g., scaling and/or shearing, the effect of
+ <code>shift_times()</code> may be unpredictable.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+      <pre class="example">          Transform t;
+           t.shift(1, 2, 3);
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           1 2 3 1
+ </pre>
+         <pre class="example">          t.shift_times(2, 2, 2);
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           2 4 6 1
+ </pre>
+         <pre class="example">          Rectangle r[4];
+           r[0].set(origin, 1, 1, 90);
+           r[3] = r[2] = r[1] = r[0];
+           Transform t;
+           t.shift(1.5, 1.5);
+           r[0] *= t;
+           r[0].draw();
+           t.shift_times(1.5, 1.5);
+           r[1] *= t;
+           r[1].draw();
+           t.shift_times(1.5, 1.5);
+           r[2] *= t;
+           r[2].draw();
+           t.shift_times(1.5, 1.5);
+           r[3] *= t;
+           r[3].draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF73.png"
+ alt="[Figure 73. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 73. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Cuboid c(origin, 1, 1, 1);
+           c.draw();
+           Transform t;
+           t.rotate(30, 30, 30);
+           t.shift(1, 0, 1);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF74.png"
+ alt="[Figure 74. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 74. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-rotate-287"></a></var><br>
+ <blockquote><p>Rotation around the main axes. 
+ Creates a <code>Transform t</code> representing the rotation,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>Point p0, Point p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-288"></a></var><br>
+ <blockquote><p>Rotation around an arbitrary axis.  The <code>Point</code> arguments represent
+ the end points of the axis, and <var>angle</var> is the angle of rotation. 
+ Since 180 degrees
+  rotation is needed so often, 180 is the default for
+ <var>angle</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-289"></a></var><br>
+ <blockquote><p>Rotation around an arbitrary axis.  <code>Path</code> argument. 
+ The <code>Path</code> <var>p</var> must be linear, i.e., <code>p.is_linear()</code> must
+ return <code>true</code>.  See <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> For a person, not in the sense of the program behaving
+ unpredictably.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Aligning-Paths-with-an-Axis.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Aligning-Paths-with-an-Axis.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Aligning Paths with an Axis - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths" title="Affine Transformations for Paths">
+ <link rel="next" href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths" title="Applying Transformations to Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Aligning-Paths-with-an-Axis"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.10 Aligning with an Axis</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Transform <b>align_with_axis</b> ([<var>const char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-581"></a></var><br>
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>bool assign, </var>[<var>const char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-582"></a></var><br>
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>const Point&amp; p0, const Point&amp; p1, const char axis</var>)<var><a name="index-align_005fwith_005faxis-583"></a></var><br>
+ <blockquote><p>These functions return the <code>Transform</code> which, if applied to the
+ <code>Path</code>, would align it with the major axis indicated by the
+ <var>axis</var> argument.
+ 
+         <p>The first and second versions can only be called
+ for <code>Paths</code> where <code>line_switch</code> is <code>true</code>.  The first
+ version is <code>const</code>, so the <code>Path</code> remains unchanged.  The second
+ version should only be called with <var>assign</var><code> = true</code>, so that the
+ <code>Transform</code> is applied to the <code>Path</code>, actually aligning it with
+ the axis indicated.  If the second version is called with
+ <var>assign</var><code> = false</code>, a warning message is issued to the standard error
+ output (<code>stderr</code>), since one might as well use the first version in
+ this case, but it won't do any harm.  The third version creates a
+ <code>Transform</code> <var>t</var> locally that would align the line from <var>p0</var> to
+ <var>p1</var> with the axis indicated, and applies <var>t</var> to the <code>Path</code>.
+ 
+      <pre class="example">          Point A(2, 3, 2);
+           Point B(-1, 1, 3);
+           Path p(A, B);
+           Transform t = p.align_with_axis(true, 'z');
+           t.show("t:");
+           -| t:
+               -0.316   0.507  -0.802       0
+                    0  -0.845  -0.535       0
+               -0.949  -0.169   0.267       0
+                 2.53    1.86    2.67       1
+           p *= t;
+           p.show("p:");
+           -| p:
+              (2.53, 1.86, 2.67) -- (-1.02, 1.23, 3.67);
+           
+           Point C(1);
+           C *= t.inverse();
+           
+           Path q;
+           q += "..";
+           q += C;
+           
+           for (int i = 0; i &lt; 15; ++i)
+             {
+               C.rotate(A, B, 360.0/16);
+               q += C;
+             }
+           q.set_cycle(true);
+           q.show("q:");
+           -| q:
+              (1.68, 3, 1.05) .. (1.9, 2.68, 1.06) ..
+              (2.13, 2.4, 1.21) .. (2.35, 2.22, 1.48) ..
+              (2.51, 2.15, 1.83) .. (2.59, 2.22, 2.21) ..
+              (2.58, 2.4, 2.55) .. (2.49, 2.68, 2.81) ..
+              (2.32, 3, 2.95) .. (2.1, 3.32, 2.94) ..
+              (1.87, 3.6, 2.79) .. (1.65, 3.78, 2.52) ..
+              (1.49, 3.85, 2.17) .. (1.41, 3.78, 1.79) ..
+              (1.42, 3.6, 1.45) .. (1.51, 3.32, 1.19) .. cycle;
+           q.align_with_axis(A, B, 'z');
+           q.show("q:");
+           -| q:
+              (1, 0, 0) .. (0.924, 0.383, 0) ..
+              (0.707, 0.707, 0) .. (0.383, 0.924, 0) ..
+              (0, 1, 0) .. (-0.383, 0.924, 0) ..
+              (-0.707, 0.707, 0) .. (-0.924, 0.383, 0) ..
+              (-1, 0, 0) .. (-0.924, -0.383, 0) ..
+              (-0.707, -0.707, 0) .. (-0.383, -0.924, 0) ..
+              (0, -1, 0) .. (0.383, -0.924, 0) ..
+              (0.707, -0.707, 0) .. (0.924, -0.383, 0) .. cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF119.png"
+ alt="[Figure 119. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 119. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Alignment-with-an-Axis-for-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Alignment-with-an-Axis-for-Transforms.html
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*** 0 ****
--- 1,130 ----
+ <html lang="en">
+ <head>
+ <title>Alignment with an Axis for Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms" title="Affine Transformations for Transforms">
+ <link rel="next" href="Resetting-Transforms.html#Resetting-Transforms" title="Resetting Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Alignment-with-an-Axis-for-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Resetting-Transforms.html#Resetting-Transforms">Resetting Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.11 Alignment with an Axis</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>Point p0, Point p1, </var>[<var>char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-290"></a></var><br>
+ <blockquote><p>Returns the <code>Transform</code> that would align the line through <var>p0</var>
+ and <var>p1</var> with the major axis denoted by the <var>axis</var> argument. 
+ The default is the z-axis.  This function is used in the functions that
+ find intersections.
+ 
+      <pre class="example">          Point P0(1, 1, 1);
+           Point P1(2, 3, 4);
+           P0.draw(P1);
+           P0.dotlabel("$P_0$");
+           P1.dotlabel("$P_1$");
+           Transform t;
+           t.align_with_axis(P0, P1, 'z');
+           P0 *= P1 *= t;
+           t.show("t:");
+           -| t:
+                0.949  -0.169   0.267       0
+                    0   0.845   0.535       0
+               -0.316  -0.507   0.802       0
+               -0.632  -0.169    -1.6       1
+           P0.show("P0:");
+           -| P0: (0, 0, 0)
+           P1.show("P1:");
+           -| P1: (0, 0, 3.74)
+ </pre>
+         <p>The following example shows how <code>align_with_axis()</code> can be used for
+ putting plane figures into a
+ major plane.
+ 
+      <pre class="example">          default_focus.set(2, 3, -10, 2, 3, 10, 10);
+           Circle c(origin, 3, 75, 25, 6);
+           c.shift(2, 3);
+           c.draw();
+           Point n = c.get_normal();
+           n.shift(c.get_center());
+           Transform t;
+           t.align_with_axis(c.get_center(), n, 'y');
+           t.show("t:");
+           -| t:
+             0.686   0.379  -0.621       0
+             0.543     0.3   0.784       0
+             0.483  -0.875       0       0
+                -3   -1.66   -1.11       1
+           n *= c *= t;
+           c.draw();
+           c.show("c:");
+           -| c:
+           fill_draw_value == 0
+           (1.31, 0, -0.728) .. (1.49, 0, -0.171) ..
+           (1.44, 0, 0.413) .. (1.17, 0, 0.933) ..
+           (0.728, 0, 1.31) .. (0.171, 0, 1.49) ..
+           (-0.413, 0, 1.44) .. (-0.933, 0, 1.17) ..
+           (-1.31, 0, 0.728) .. (-1.49, 0, 0.171) ..
+           (-1.44, 0, -0.413) .. (-1.17, 0, -0.933) ..
+           (-0.728, 0, -1.31) .. (-0.171, 0, -1.49) ..
+           (0.413, 0, -1.44) .. (0.933, 0, -1.17) .. cycle;
+           n.show("n:");
+           -| n: (0, 1, 0)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF75.png"
+ alt="[Figure 75. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 75. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Appending-to-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Appending-to-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Appending-to-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Appending-to-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,100 ----
+ <html lang="en">
+ <head>
+ <title>Appending to Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Path-Operators.html#Path-Operators" title="Path Operators">
+ <link rel="next" href="Copying-Paths.html#Copying-Paths" title="Copying Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Appending-to-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Copying-Paths.html#Copying-Paths">Copying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Operators.html#Path-Operators">Path Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.5 Appending</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>append</b> (<var>const Path&amp; pa, </var>[<var>string connector = "&ndash;", </var>[<var>bool assign = </var><code>true</code>]])<var><a name="index-append-560"></a></var><br>
+ <blockquote><p>Appends <var>pa</var> to <code>*this</code> using <var>connector</var> to join them and
+ returns the resulting <code>Path</code>.  If
+ <var>assign</var> == <code>true</code>, then the return value is
+ assigned to <code>*this</code>, otherwise, <code>*this</code> remains unchanged.
+ 
+         <p>If necessary, a <code>const</code> version could be added, for
+ <code>const Paths</code>.
+ 
+      <pre class="example">          Point A(-2, 2);
+           Point B(-2, -2);
+           Point C(2, -2);
+           Point D(2, 2);
+           Path q("--", false, &amp;A, &amp;B, &amp;C, &amp;D, 0);
+           Point E(1, 2);
+           Point F(0, 4);
+           Point G(-.5, 3);
+           Path r("..", false, &amp;E, &amp;F, &amp;G, 0);
+           q.append(r, "..", true);
+           q += "..";
+           q += "--";
+           q.set_cycle();
+           q.show("q:");
+           -| q:
+              (-2, 2, 0) -- (-2, -2, 0) --
+              (2, -2, 0) -- (2, 2, 0) ..
+              (1, 2, 0) .. (0, 4, 0) ..
+              (-0.5, 3, 0) -- cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF114.png"
+ alt="[Figure 114. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 114. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Paths.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Applying Transformations to Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis" title="Aligning Paths with an Axis">
+ <link rel="next" href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths" title="Drawing and Filling Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Applying-Transformations-to-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.11 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-584"></a></var><br>
+ <blockquote><p>Calls <code>Point::apply_transform()</code> on all of the <code>Points</code> on
+ <code>points</code>. 
+ See <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Points.html
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+ <html lang="en">
+ <head>
+ <title>Applying Transformations to Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points" title="Affine Transformations for Points">
+ <link rel="next" href="Projecting-Points.html#Projecting-Points" title="Projecting Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Applying-Transformations-to-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Projecting-Points.html#Projecting-Points">Projecting Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.13 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-424"></a></var><br>
+ <blockquote><p>Updates <code>world_coordinates</code> by multiplying it by <code>transform</code>,
+ which is subsequently reset to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Shapes.html
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--- 1,65 ----
+ <html lang="en">
+ <head>
+ <title>Applying Transformations to Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes" title="Affine Transformations for Shapes">
+ <link rel="next" href="Clearing-Shapes.html#Clearing-Shapes" title="Clearing Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Applying-Transformations-to-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Clearing-Shapes.html#Clearing-Shapes">Clearing Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.6 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-249"></a></var><br>
+ <blockquote><p>Applies the <code>Transform</code> stored in the <code>transform</code> data member
+ of the <code>Points</code> belonging to the <code>Shape</code> to their
+ <code>world_coordinates</code>.  The <code>transforms</code> are subsequently reset
+ to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transformations-to-Solids.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,63 ----
+ <html lang="en">
+ <head>
+ <title>Applying Transformations to Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids" title="Affine Transformations for Solids">
+ <link rel="next" href="Outputting-Solids.html#Outputting-Solids" title="Outputting Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Applying-Transformations-to-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.11 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>apply_transform</b> (<code>void</code>)<var><a name="index-apply_005ftransform-818"></a></var><br>
+ <blockquote><p>Calls <code>apply_transform()</code> on all of the <code>Shapes</code> belonging to
+ the <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transforms-to-Points-Intro.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Applying-Transforms-to-Points-Intro.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Applying-Transforms-to-Points-Intro.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Applying Transforms to Points Intro - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforms.html#Transforms" title="Transforms">
+ <link rel="prev" href="Transforms.html#Transforms" title="Transforms">
+ <link rel="next" href="Inverting-Transforms.html#Inverting-Transforms" title="Inverting Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Applying-Transforms-to-Points-Intro"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Inverting-Transforms.html#Inverting-Transforms">Inverting Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transforms.html#Transforms">Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforms.html#Transforms">Transforms</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">4.1 Applying Transforms to Points</h3>
+ 
+ <p>A <code>Transform</code> t is applied to a
+ <code>Point</code> P using the binary <code>*=</code> operation
+ (<code>Point::operator*=(const Transform&amp;)</code>)
+ which performs matrix multiplication of <code>P.transform</code> by <code>t</code>. 
+ See <a href="Point-Operators.html#Point-Operators">Point Reference; Operators</a>.
+ 
+ <pre class="example">     Point P(0, 1);
+      Transform t;
+      t.rotate(90);
+      t.show("t:");
+      -| t:
+         1       0       0       0
+         0       0      -1       0
+         0       1       0       0
+         0       0       0       1
+      P *= t;
+      P.show_transform("P:");
+      -| P:
+      Transform:
+         1       0       0       0
+         0       0      -1       0
+         0       1       0       0
+         0       0       0       1
+      P.show("P:");
+      -| P: (0, 0, -1)
+ </pre>
+    <p>In the example above, there is no real need to use a <code>Transform</code>,
+ since <code>P.rotate(90)</code> could  have been called directly. 
+ As constructions become more complex, the power of <code>Transforms</code>
+ becomes clear:
+ 
+ <!-- !! TO DO: Maybe make @code{Points} the same to begin with. -->
+ <!-- LDF 2003.08.15. -->
+ <pre class="example">     <span class="roman">1.</span> Point p0(0, 0, 0);
+      <span class="roman">2.</span> Point p1(10, 5, 10);
+      <span class="roman">3.</span> Point p2(16, 14, 32);
+      <span class="roman">4.</span> Point p3(25, 50, 99);
+      <span class="roman">5.</span> Point p4(12, 6, 88);
+      <span class="roman">6.</span> Transform a;
+      <span class="roman">7.</span> a.shift(2, 3, 4);
+      <span class="roman">8.</span> a.scale(1, 3, 1);
+      <span class="roman">9.</span> p2 *= p3 *= a;
+      <span class="roman">10.</span> a.rotate(p0, p1, 75);
+      <span class="roman">11.</span> p4 *= a;
+      <span class="roman">12.</span> p2.show("p2:");
+         -| p2: (18, 51, 36)
+      <span class="roman">13.</span> p3.show("p3:");
+         -| p3: (27, 159, 103)
+      <span class="roman">14.</span> p4.show("p4:");
+         -| p4: (24.4647, -46.2869, 81.5353)
+ </pre>
+    <!-- !!  TO DO: If I change the example above, I may have to change this -->
+ <!-- paragraph.  LDF 2003.08.15. -->
+    <p>In this example, a is shifted and scaled, and a is applied
+ to both in line 9.  This works, because
+ the binary operation
+ <code>operator*=(const Transform&amp; t)</code> returns <var>t</var>,
+ making it possible to chain invocations of <code>*=</code>. 
+ Following this, a is rotated
+ 75 degrees
+ 
+    <p>about the line through p_0 and p_1. 
+ Finally, all three transformations, which are stored in a, are
+ applied to p_4.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Bibliography.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Bibliography.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Bibliography.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Bibliography - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Changes.html#Changes" title="Changes">
+ <link rel="next" href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License" title="GNU Free Documentation License">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Bibliography"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License">GNU Free Documentation License</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes.html#Changes">Changes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="unnumbered">Bibliography</h2>
+ 
+ <!-- I'm not happy with the formatting of the bibliography entries, but I -->
+ <!-- wasn't able to fix it.  I tried various solutions involving \hangafter -->
+ <!-- and \hangindent and macros, but none of them worked.  LDF 2003.12.07. -->
+ <!-- Nor was I able to prevent the displayed comment about Vredemann de Vries -->
+ <!-- from being split from the entry.  !! I think fixing these problems -->
+ <!-- will involve  fixing texinfo.tex.  LDF 2003.12.07. -->
+ <p>Cundy, H. Martyn and A.P. Rollet. 
+ <i>Mathematical Models</i>. 
+ Oxford 1961. 
+ Oxford University Press.
+ 
+ <pre class="display">     Unfortunately out of print.
+ </pre>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Finston, Laurence D. 
+ <i>3DLDF:  The Program</i>. 
+ G&ouml;ttingen 2003.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Fischer, Gerd. 
+ <i>Ebene algebraische Kurven</i>. 
+ Vieweg Studium.  Aufbaukurs Mathematik. 
+ Friedr.&nbsp;<!-- /@w -->Vieweg &amp; Sohn Verlagsgesellschaft mbH. 
+ Braunschweig/Wiesbaden 1994.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Gill, Robert W. 
+ <i>Creative Perspective</i>. 
+ London 1975. 
+ Thames and Hudson Ltd. 
+ ISBN&nbsp;0-500-27056-2.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Harbison, Samuel P., and Guy L. Steele Jr. 
+ <i>C, A Reference Manual</i>. 
+ Prentice Hall. 
+ Englewood Cliffs, New Jersey 1995. 
+ ISBN&nbsp;0-13-326232-4&nbsp;{Case}.<!-- /@w -->
+ ISBN~0-13-326224-3&nbsp;{Paperback}.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>Smooth, Easy to Compute Interpolating Splines</i>. 
+ Discrete and Computational Geometery 1(2). 
+ Springer-Verlag. 
+ New York 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>A User's Manual for MetaPost</i>. 
+ AT &amp; T Bell Laboratories. 
+ Murray Hill, NJ. No date.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Jones, Huw. 
+ <i>Computer Graphics through Key Mathematics</i>. 
+ Springer-Verlag London Limited 2001. 
+ ISBN&nbsp;1-85233-422-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>Metafont:  The Program</i>. Computers and Typesetting; D. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986. 
+ ISBN&nbsp;0-201-13438-1.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>. 
+ Computers and Typesetting; C. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>TeX: The Program</i>. Computers and Typesetting; B. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986. 
+ ISBN&nbsp;0-201-13437-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. <i>The TeXbook</i>. 
+ Computers and Typesetting; A. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. and Silvio Levy. 
+ <i>The </i><b>CWEB</b><i> System of Structured Documentation</i>. 
+ Version&nbsp;3.64&mdash;February&nbsp;2002.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Rokicki, Tomas. 
+ <i>Dvips: A DVI-to-PostScript Translator</i>
+ for version 5.66a. 
+ February 1997. 
+ <a href="http://dante.ctan.org/CTAN/dviware/dvips/">http://dante.ctan.org/CTAN/dviware/dvips/</a>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Salomon, David. 
+ <i>Computer Graphics and Geometric Modeling</i>. 
+ Berlin 1999. 
+ Springer-Verlag. 
+ ISBN:&nbsp;0-387-98682-0.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stallman, Richard M. and Roland McGrath. 
+ <i>GNU Make.  A Program for Directing Recompilation. 
+ </i><b>make</b><i> Version 3.79</i>. 
+ Boston 2000. 
+ Free Software Foundation, Inc. 
+ ISBN:&nbsp;1-882114-80-9.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stallman, Richard M. 
+ <i>Using and Porting the GNU Compiler Collection</i>. 
+ For GCC Version 3.3.2. 
+ Boston 2003. 
+ Free Software Foundation, Inc.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The C++
+  Programming Language</i>. 
+ Special Edition. 
+ Reading, Massachusetts 2000. 
+ Addison-Wesley. 
+ ISBN&nbsp;0-201-70073-5.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The Design and Evolution of C++
+ </i>. 
+ Reading, Massachusetts 1994. 
+ Addison-Wesley Publishing Company. 
+ ISBN&nbsp;0-201-54330-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Vredeman de Vries, Jan. 
+ <i>Perspective</i>. 
+ New York 1968. 
+ Dover Publications, Inc. 
+ Standard&nbsp;Book&nbsp;Number:&nbsp;486-21086-4.<!-- /@w -->
+ 
+ <pre class="display">     The beautiful perspective constructions in this volume are taken from
+      the original work, first published by Henricus Hondius in Leiden in 1604
+      and 1605.
+ </pre>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">White, Gwen. 
+ <i>Perspective.  A Guide for Artists, Architects and Designers</i>. 
+ London 1968 and 1982. 
+ B T Batsford Ltd. 
+ ISBN&nbsp;0-7134-3412-0.<!-- /@w -->
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/CWEB-Documentation.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/CWEB-Documentation.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/CWEB-Documentation.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/CWEB-Documentation.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,115 ----
+ <html lang="en">
+ <head>
+ <title>CWEB Documentation - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="About-This-Manual.html#About-This-Manual" title="About This Manual">
+ <link rel="next" href="Metafont-and-MetaPost.html#Metafont-and-MetaPost" title="Metafont and MetaPost">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="CWEB-Documentation"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="About-This-Manual.html#About-This-Manual">About This Manual</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.3 CWEB Documentation</h3>
+ 
+ <p>As mentioned above, 3DLDF has been programmed using CWEB, which is a
+ &ldquo;literate programming&rdquo; tool developed by
+ Donald E. Knuth and Silvio Levy.  See <a href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a>, for a
+ reference to the CWEB manual. 
+ Knuth's <cite>TeX&mdash;The Program</cite> and
+ <cite>Metafont&mdash;The Program</cite> both include a section
+ &ldquo;How to read a WEB&rdquo; (pp. x&ndash;xv, in both volumes).
+ 
+    <p>CWEB files combine source code
+ and documentation.  Running <samp><span class="command">ctangle</span></samp> on a CWEB file,
+ for example, <samp><span class="file">main.web</span></samp>, produces the file <samp><span class="file">main.c</span></samp> containing
+ C or C++
+  code.  Running <samp><span class="command">cweave main.web</span></samp> creates a
+ TeX file with pretty-printed source code and nicely formatted
+ documentation.  I find that using CWEB makes it more natural to
+ document my code as I write it, and makes the source files easier to
+ read when editing them.  It does have certain consequences
+ with regard to compilation, but these are taken care of by <samp><span class="command">make</span></samp>. 
+ See <a href="Adding-a-File.html#Adding-a-File">Adding a File</a>, and <a href="Changes.html#Changes">Changes</a>, for more
+ information.
+ 
+    <p>The CWEB files in the directory <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> contain the
+ source code for 3DLDF.  The file <samp><span class="file">3DLDFprg.web</span></samp> in this directory
+ is only ever used for cweaving;  it is never ctangled and contains no
+ C++
+  code for compilation.  It does, however, include all of the other
+ CWEB files, so that <samp><span class="command">cweave 3DLDFprg.web</span></samp> generates the TeX file
+ containing the complete documentation of the source code of 3DLDF.
+ 
+    <p>The files <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.tex</span></samp>,
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.dvi</span></samp>, and
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.ps</span></samp> are
+ included in the distribution of 3DLDF as a
+ convenience.  However, users may generate them themselves, should there
+ be some reason for doing so, by entering <samp><span class="command">make ps</span></samp>
+ from the command line of a shell from the working
+ directory <samp><span class="file">3DLDF-1.1.5.1/</span></samp> or <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>. 
+ Alternatively, the user may generate them
+ by hand from the working directory <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> in the
+ following way:
+ 
+      <ol type=1 start=1>
+ <li><samp><span class="command">cweave 3DLDFprg.web</span></samp>
+ generates <samp><span class="file">3DLDFprg.tex</span></samp>.
+ 
+      <li><samp><span class="command">tex 3DLDFprg</span></samp> or <samp><span class="command">tex 3DLDFprg.tex</span></samp> generates
+ <samp><span class="file">3DLDFprg.dvi</span></samp>.
+ 
+      <li><samp><span class="command">dvips -o 3DLDFprg.ps 3DLDFprg</span></samp> (possibly with additional options)
+ generates <samp><span class="file">3DLDFprg.ps</span></samp>.
+ 
+      <li><samp><span class="command">lpr -P&lt;</span><em>print queue</em><span class="command">&gt; 3DLDFprg.ps</span></samp>
+ sends <samp><span class="file">3DLDFprg.ps</span></samp> to a printer, on a UNIX or UNIX-like system.
+         </ol>
+ 
+    <p>The individual commands may differ, depending on the system you're
+ using.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Caveats.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Caveats.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Caveats.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Caveats.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,62 ----
+ <html lang="en">
+ <head>
+ <title>Caveats - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="Metafont-and-MetaPost.html#Metafont-and-MetaPost" title="Metafont and MetaPost">
+ <link rel="next" href="Ports.html#Ports" title="Ports">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Caveats"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ports.html#Ports">Ports</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.5 Caveats</h3>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Accuracy.html#Accuracy">Accuracy</a>
+ <li><a accesskey="2" href="No-Input-Routine.html#No-Input-Routine">No Input Routine</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,75 ----
+ <html lang="en">
+ <head>
+ <title>Changes in 3DLDF 1.1.4 - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1" title="Changes in 3DLDF 1.1.4.1">
+ <link rel="next" href="Initial-version.html#Initial-version" title="Initial version">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Initial-version.html#Initial-version">Initial version</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.5 3DLDF 1.1.4</h3>
+ 
+      <ul>
+ <li><code>MAX_REAL</code> is now the second largest float value.  However, the
+ calculation is system dependent, and will only work on 32-bit
+ little-endian architectures.  I will start working on porting this
+ soon.
+ 
+      <li>Fixed bug in <samp><span class="file">tsthdweb</span></samp>, that caused files to be compiled more
+ often than necessary.  It will be necessary to keep an eye on this.
+ 
+      <li>Added <code>Rectangle::is_rectangular()</code>.
+ 
+      <li>Made <code>mediate()</code> a member function of <code>Point</code>.
+ 
+      <li>It is now possible to generate this manual in the Info and HTML
+ formats. 
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e1.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e1.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e1.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e1.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,62 ----
+ <html lang="en">
+ <head>
+ <title>Changes in 3DLDF 1.1.4.1 - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2" title="Changes in 3DLDF 1.1.4.2">
+ <link rel="next" href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4" title="Changes in 3DLDF 1.1.4">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4.1"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4_002e1"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.4 3DLDF 1.1.4.1</h3>
+ 
+      <ul>
+ <li>The HTML output now includes illustrations. 
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e2.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e2.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e2.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e4_002e2.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,63 ----
+ <html lang="en">
+ <head>
+ <title>Changes in 3DLDF 1.1.4.2 - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5" title="Changes in 3DLDF 1.1.5">
+ <link rel="next" href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1" title="Changes in 3DLDF 1.1.4.1">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4.2"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4_002e2"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.3 3DLDF 1.1.4.2</h3>
+ 
+      <ul>
+ <li>The illustrations in the HTML output are now scaled to
+ <code>magstep3</code>. 
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,116 ----
+ <html lang="en">
+ <head>
+ <title>Changes in 3DLDF 1.1.5 - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1" title="Changes in 3DLDF 1.1.5.1">
+ <link rel="next" href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2" title="Changes in 3DLDF 1.1.4.2">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.5"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e5"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.2 3DLDF 1.1.5</h3>
+ 
+ <p>In release 1.1.5, I've tied up some loose ends.  I wanted to do this
+ before starting on the input routine.
+ 
+      <ul>
+ <li>Added <code>const real</code> <var>step</var> argument to the version of
+ <code>Ellipse::intersection_points()</code> that takes an <code>Ellipse</code>
+ argument. 
+ See <a href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Reference; Intersections</a>.
+ 
+      <li>It is now possible to &ldquo;typedef&rdquo; <code>real</code> to either <code>float</code>
+ or <code>double</code>.  This means that <code>real</code> can now be made a synonym
+ for either <code>float</code> or <code>double</code> by using a <code>typedef</code>
+ declaration.  <code>real</code> is typedeffed to <code>float</code> by default.
+ 
+      <li>Added <code>const bool ldf_real_float</code> and
+ <code>extern const bool ldf_real_double</code>
+ for use in non-conditionally compiled code. 
+ They are set according to the values
+ of <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.
+ 
+      <li><code>Transform::epsilon()</code> and <code>Point::epsilon()</code> now return
+ different values, depending on the values of the preprocessor macros
+ <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.  I have not yet tested
+ whether good values are returned when <code>real</code> is <code>double</code>.
+ 
+      <li><code>MAX_REAL</code> and <code>MAX_REAL_SQRT</code> are no longer constants. 
+ Their values are set at the beginning of <code>main()</code>.  However,
+ users should not change their values.  <code>MAX_REAL</code> is the
+ second-largest <code>float</code> or <code>double</code> on a given machine.  This
+ now works for all common architectures.
+ 
+      <li>Added <code>namespace System</code> containing the following functions:
+ <code>get_endianness()</code>, <code>is_big_endian()</code>,
+ <code>is_little_endian()</code>, <code>get_register_width()</code>,
+ <code>is_32_bit()</code>, <code>is_64_bit()</code>, and the template function
+ <code>get_second_largest()</code>.
+ 
+      <p><code>namespace System</code> and its functions are documented in
+ <samp><span class="file">system.texi</span></samp>, which is new in edition 1.1.5.1.
+ 
+      <li>Replaced the various <code>create_new_</code>&lt;<i>type</i>&gt;<code>()</code> functions with the
+ template function <code>create_new()</code>.  The latter is documented in
+ <samp><span class="file">creatnew.texi</span></samp>, which is new in edition 1.1.5.1.
+ 
+      <li>Added the file <samp><span class="file">3DLDF-1.1.5.1/CWEB/cnepspng.el</span></samp> to
+ the distribution.  It contains the definitions of the Emacs-Lisp
+ functions <samp><span class="command">convert-eps</span></samp> and <samp><span class="command">convert-eps-loop</span></samp>. 
+ See <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Running 3DLDF; Converting EPS Files; Emacs-Lisp Functions</a>.
+ 
+      <li>Added the files
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> and<br>
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/examples.mp</span></samp> to the
+ distribution.  They contain the C++
+  and MetaPost code,
+ respectively, for generating the illustrations in this manual.
+ 
+    </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5_002e1.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5_002e1.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5_002e1.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes-in-3DLDF-1_002e1_002e5_002e1.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,70 ----
+ <html lang="en">
+ <head>
+ <title>Changes in 3DLDF 1.1.5.1 - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes.html#Changes" title="Changes">
+ <link rel="next" href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5" title="Changes in 3DLDF 1.1.5">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.5.1"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e5_002e1"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes.html#Changes">Changes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.1 3DLDF 1.1.5.1</h3>
+ 
+      <ul>
+ <li>Added missing Texinfo files to the <code>3dldf_TEXINFOS</code> variable in
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/Makefile.am</span></samp>, and reordered the
+ filenames.
+ 
+      <li><a name="index-PNG-_0028Portable-Network-Graphics_0029-911"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-912"></a>Changed the names of the PNG (Portable Network Graphics) files
+ included in the HTML version of this manual. 
+ Changed the names in the commands for including these
+ files in the Texinfo files.  I wasn't able to write some of the
+ files with the old names to a CD-R (Compact Disk, Recordable). 
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Changes.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Changes.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Changes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="next" href="Bibliography.html#Bibliography" title="Bibliography">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Changes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Bibliography.html#Bibliography">Bibliography</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Future-Plans.html#Future-Plans">Future Plans</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">41 Changes</h2>
+ 
+ <p class="noindent">Updated 16 January 2004.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>
+ <li><a accesskey="2" href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>
+ <li><a accesskey="3" href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>
+ <li><a accesskey="4" href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>
+ <li><a accesskey="5" href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>
+ <li><a accesskey="6" href="Initial-version.html#Initial-version">Initial version</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,95 ----
+ <html lang="en">
+ <head>
+ <title>Circle Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="prev" href="Circle-Data-Members.html#Circle-Data-Members" title="Circle Data Members">
+ <link rel="next" href="Circle-Operators.html#Circle-Operators" title="Circle Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circle-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circle-Operators.html#Circle-Operators">Circle Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Circle-Data-Members.html#Circle-Data-Members">Circle Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">32.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: <code>void</code> <b>Circle</b> (<code>void</code>)<var><a name="index-Circle-761"></a></var><br>
+ <blockquote><p>Creates an empty <code>Circle</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: <code>void</code> <b>Circle</b> (<var>const Point&amp; ccenter, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = </var><code>DEFAULT_NUMBER_OF_POINTS</code>]]]])<var><a name="index-Circle-762"></a></var><br>
+ <blockquote><p>Creates a <code>Circle</code> with <code>radius</code> ==
+ <var>ddiameter</var>/2 in the x-z plane and centered at the origin
+ with <var>nnumber_of_points</var> <code>Points</code>.  If any of the arguments
+ <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> is
+ <code>!= 0</code>,
+ the <code>Circle</code> is rotated around the major axes by the angles
+ indicated by the arguments.  Finally, the
+ <code>Circle</code> is shifted such that <code>center</code> comes to lie at
+ <var>ccenter</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-763"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Circle* <b>create_new&lt;Circle&gt;</b> (<var>const Circle* c</var>)<var><a name="index-create_005fnew_003cCircle_003e-764"></a></var><br>
+ &mdash; : Circle* <b>create_new&lt;Circle&gt;</b> (<var>const Circle&amp; c</var>)<var><a name="index-create_005fnew_003cCircle_003e-765"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Circles</code>. 
+ They create a <code>Circle</code> on the free store and allocate memory for it using
+ <code>new(Circle)</code>.  They return a pointer to the new <code>Circle</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Circle</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Circle&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Circle Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="prev" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="next" href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions" title="Circle Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circle-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">32.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>radius</b><var><a name="index-radius-760"></a></var><br>
+ <blockquote><p>The radius of the <code>Circle</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Intersections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Intersections.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Intersections.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Circle Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="prev" href="Querying-Circles.html#Querying-Circles" title="Querying Circles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circle-Intersections"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Circles.html#Querying-Circles">Querying Circles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">32.5 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual <code>const</code> function: bool_point_quadruple <b>intersection_points</b> (<var>const Circle&amp; c, </var>[<var>const bool verbose = </var><code>false</code>])<var><a name="index-intersection_005fpoints-771"></a></var><br>
+ <blockquote><p>Returns the intersection points of two <code>Circles</code>.
+ 
+         <p>If the <code>Circles</code> are coplanar, they can intersect at at most two
+ points.  There is an easy algebraic solution for this, so in this case,
+ this function is faster than <code>Ellipse::intersection_points(Ellipse,
+ bool)</code>, which uses an iterative procedure to find the points.
+ 
+         <p>If the <code>Circles</code> are non-coplanar, the intersection points of each
+ <code>Circle</code> with the plane of the other <code>Circle</code> are returned, so
+ a maximum of four <code>Points</code> can be found.
+ 
+      <!-- !! TO DO:  Add more examples. -->
+      <pre class="example">          Circle t(origin, 5, 90);
+           Circle c(origin, 3, 90);
+           c.shift(3);
+           c.rotate(0, 0, 45);
+           bool_point_quadruple bpq = t.intersection_points(c);
+           bpq.first.pt.dotlabel("$f$");
+           bpq.second.pt.dotlabel("$s$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF177.png"
+ alt="[Figure 177. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 177. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- pattern.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Operators.html
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+ <html lang="en">
+ <head>
+ <title>Circle Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="prev" href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions" title="Circle Constructors and Setting Functions">
+ <link rel="next" href="Querying-Circles.html#Querying-Circles" title="Querying Circles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circle-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Circles.html#Querying-Circles">Querying Circles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">32.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Circle&amp; <b>operator=</b> (<var>const Circle&amp; c</var>)<var><a name="index-operator_003d-766"></a></var><br>
+ <blockquote><p>Makes the <code>Circle</code> a copy of <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Circle&amp; <b>operator=</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-operator_003d-767"></a></var><br>
+ <blockquote><p>Makes the <code>Circle</code> a copy of <var>e</var>, if <var>e</var> is circular. 
+ <code>radius</code> is set to <var>e</var>.<code>axis_v</code> / 2 and
+ <code>*this</code> is returned.
+ 
+         <p>If <var>e</var> is not circular, this function issues an error message and returns <code>*this</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circle-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circle-Reference.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,76 ----
+ <html lang="en">
+ <head>
+ <title>Circle Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="next" href="Pattern-Reference.html#Pattern-Reference" title="Pattern Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circle-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">32 Circle Reference</h2>
+ 
+ <p><a name="index-Circle-759"></a>Class <code>Circle</code> is defined in <samp><span class="file">circles.web</span></samp>. 
+ It is derived from <code>Ellipse</code>, using public derivation.
+ 
+    <p>Since <code>Circle</code> is just a special kind of <code>Ellipse</code>, there is
+ often no need to define special functions for <code>Circles</code>.
+ 
+    <p>Currently, <code>Circle</code> inherits the transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Ellipse</code>.  Consequently,
+ the data member <code>radius</code>, described below,
+ is not recalculated, when transformations
+ are performed on a <code>Circle</code>.  I plan to change this soon!
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Circle-Data-Members.html#Circle-Data-Members">Circle Data Members</a>
+ <li><a accesskey="2" href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Circle-Operators.html#Circle-Operators">Circle Operators</a>
+ <li><a accesskey="4" href="Querying-Circles.html#Querying-Circles">Querying Circles</a>
+ <li><a accesskey="5" href="Circle-Intersections.html#Circle-Intersections">Circle Intersections</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circles-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circles-Getstart.html
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+ <html lang="en">
+ <head>
+ <title>Circles Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="prev" href="Ellipses-Getstart.html#Ellipses-Getstart" title="Ellipses Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circles-Getstart"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipses-Getstart.html#Ellipses-Getstart">Ellipses Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">7.4 Circles</h3>
+ 
+ <p><code>Circles</code> are constructed just like <code>Ellipses</code>, except that
+ the vertical and horizontal axes are per definition the same, so
+ there's only one argument for the diameter, instead of two for the
+ horizontal and vertical axes:
+ 
+ <pre class="example">     Point P(0, 2, 1);
+      Circle c(P, 3.5, 90, 90);
+      c.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF35.png"
+ alt="[Figure 35. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 35. 
+ <br>
+ </p>
+ 
+    <p>This constructor, too, has a corresponding setting function:
+ 
+ <pre class="example">     Circle c;
+      Point p(-1, 0, 5);
+      for (int i = 0; i &lt; 16; ++i)
+        {
+            c.set(p, 5, i * 22.5, 0, 0, 64);
+            c.draw();
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF36.png"
+ alt="[Figure 36. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 36. 
+ <br>
+ </p>
+ 
+    <p>In the preceding example, the last argument to <code>set()</code>, namely &ldquo;64&rdquo;,
+ is for the number of <code>Points</code> used for constructing the perimeter
+ of the <code>Circle</code>.  The default value is 16, however, if it is used,
+ foreshortening distorts the most nearly horizontal <code>Circle</code>. 
+ Increasing the number of points used improves its appearance.  However,
+ there may be a limit to how much improvement is possible. 
+ See <a href="Accuracy.html#Accuracy">Accuracy</a>.
+ 
+ <!-- chapter Solid Figures -->
+ <!-- gssolfig.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Circles-for-Regular-Polygons.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Circles-for-Regular-Polygons.html
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*** 0 ****
--- 1,152 ----
+ <html lang="en">
+ <head>
+ <title>Circles for Regular Polygons - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="prev" href="Querying-Regular-Polygons.html#Querying-Regular-Polygons" title="Querying Regular Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Circles-for-Regular-Polygons"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">Querying Regular Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">28.5 Circles</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>in_circle</b> (<var>void</var>)<var><a name="index-in_005fcircle-665"></a></var><br>
+ <blockquote><p>Returns the enclosed <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, -1, 1);
+           Reg_Polygon h(P, 6, 4, 15, 12, 11.5);
+           h.filldraw(black, gray);
+           Circle c = h.in_circle();
+           c.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF147.png"
+ alt="[Figure 147. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 147. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>draw_in_circle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-draw_005fin_005fcircle-666"></a></var><br>
+ &mdash; <code>const</code> function: Circle <b>draw_in_circle</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = ""</var>]]])<var><a name="index-draw_005fin_005fcircle-667"></a></var><br>
+ <blockquote><p>Draws and returns the enclosed <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, 1, 1);
+           Reg_Polygon h(P, 7, 4, 80, 2, 5);
+           h.draw(black, "evenly");
+           h.draw_in_circle();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF148.png"
+ alt="[Figure 148. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 148. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>out_circle</b> (<var>void</var>)<var><a name="index-out_005fcircle-668"></a></var><br>
+ <blockquote><p>Returns the surrounding <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, -1, 1);
+           Reg_Polygon h(P, 6, 4, 15, 12, 11.5);
+           Circle c = h.out_circle();
+           c.filldraw(black, gray);
+           h.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF149.png"
+ alt="[Figure 149. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 149. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>draw_out_circle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-draw_005fout_005fcircle-669"></a></var><br>
+ &mdash; <code>const</code> function: Circle <b>draw_out_circle</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = ""</var>]]])<var><a name="index-draw_005fout_005fcircle-670"></a></var><br>
+ <blockquote><p>Draws and returns the surrounding <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, 1, 1);
+           Reg_Polygon h(P, 7, 4, 80, 2, 5);
+           h.draw(black, "evenly");
+           h.draw_out_circle();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF150.png"
+ alt="[Figure 150. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 150. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- rectang.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cleaning-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cleaning-Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cleaning-Transforms.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Cleaning Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Resetting-Transforms.html#Resetting-Transforms" title="Resetting Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cleaning-Transforms"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Resetting-Transforms.html#Resetting-Transforms">Resetting Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.13 Cleaning</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clean</b> (<var>void</var>)<var><a name="index-clean-292"></a></var><br>
+ <blockquote><p>Sets elements in <var>matrix</var> whose absolute values are
+ &lt; <code>epsilon()</code> to 0. 
+ </p></blockquote></div>
+ 
+ <!-- label.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Clearing-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Paths.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Clearing Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Copying-Paths.html#Copying-Paths" title="Copying Paths">
+ <link rel="next" href="Modifying-Paths.html#Modifying-Paths" title="Modifying Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Clearing-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Copying-Paths.html#Copying-Paths">Copying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.7 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-562"></a></var><br>
+ <blockquote><p>Does the same thing the destructor <code>~Path()</code> does:
+ Calls <code>delete()</code> on the pointers to <code>Points</code> on <code>points</code>,
+ clears <code>points</code> and <code>connectors</code>, deletes <code>draw_color</code>
+ and <code>fill_color</code>, if they point to <code>Colors</code> that were
+ allocated on the free store, and sets them to 0.
+ 
+         <p><code>clear()</code> is a pure virtual function in <code>class Shape</code>,
+ so <code>Path</code> must be have a <code>clear()</code> function. 
+ It is needed, because it is sometimes called through a
+ pointer to <code>Shape</code>, so that <code>~Path()</code> cannot be accessed. 
+ At least, so far I haven't found a way to call a destructor through the
+ virtual function facility. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Clearing-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Shapes.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,65 ----
+ <html lang="en">
+ <head>
+ <title>Clearing Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes" title="Applying Transformations to Shapes">
+ <link rel="next" href="Querying-Shapes.html#Querying-Shapes" title="Querying Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Clearing-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Shapes.html#Querying-Shapes">Querying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.7 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-250"></a></var><br>
+ <blockquote><p>The precise definition of this function will depend on the nature of the
+ derived class.  In general, it will call the destructor on dynamically
+ allocated objects belonging to the <code>Shape</code>, and deallocate the
+ memory they occupied. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Clearing-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Clearing-Solids.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,73 ----
+ <html lang="en">
+ <head>
+ <title>Clearing Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids" title="Drawing and Filling Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Clearing-Solids"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.14 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>clear</b> (<code>void</code>)<var><a name="index-clear-835"></a></var><br>
+ <blockquote><p>Calls <code>clear()</code> on all the <code>Shapes</code> belonging to the
+ <code>Solid</code>. 
+ Used in <code>Picture::clear()</code> for deallocating
+ and destroying <code>Solids</code>.
+ 
+         <p>Currently, &lt;<var>Shape</var>&gt;.<code>clear()</code> always resolves to
+ <code>Path::clear()</code>, since none of the other types of <code>Shape</code> that a
+ <code>Solid</code> can contain, e.g., <code>Ellipse</code>, <code>Circle</code>, etc.,
+ overloads <code>Path::clear()</code>. 
+ </p></blockquote></div>
+ 
+ <!-- solfaced.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Color Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Color-Data-Members.html#Color-Data-Members" title="Color Data Members">
+ <link rel="next" href="Color-Operators.html#Color-Operators" title="Color Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Color-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Color-Operators.html#Color-Operators">Color Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Color</b> (<var>void</var>)<var><a name="index-Color-170"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> and initializes its <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code> to 0.  <code>use_name</code> and
+ <code>on_free_store</code> are set to <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Color</b> (<var>const Color&amp; c, </var>[<var>const string n = "", </var>[<var>const bool u = </var><code>true</code>]])<var><a name="index-Color-171"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> and makes it a copy of <var>c</var>.  If <var>n</var> is
+ not the empty string and <var>u</var> is <code>true</code>, <code>use_name</code> is set
+ to <code>true</code>.  Otherwise, its set to <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Color</b> (<var>const string n, const unsigned short r, const unsigned short g, const unsigned short b, </var>[<var>const bool u = </var><code>true</code>])<var><a name="index-Color-172"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> with name <var>n</var>.  Its <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code> are set to
+ r/255.0, g/255.0, and b/255.0,
+ respectively. 
+ <code>use_name</code> is set to <var>u</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const string n, const unsigned short r, const unsigned short g, const unsigned short b, </var>[<var>const bool u = </var><code>false</code>])<var><a name="index-set-173"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above, except that <var>u</var> is <code>false</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Color</b> (<var>const real r, const real g, const real b</var>)<var><a name="index-Color-174"></a></var><br>
+ <blockquote><p>Creates an unnamed <code>Color</code> using the <code>real</code> values <var>r</var>,
+ <var>g</var>, and <var>b</var> for its <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code>, respectively. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real r, const real g, const real b</var>)<var><a name="index-set-175"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Color* <b>create_new&lt;Color&gt;</b> (<var>const Color* c</var>)<var><a name="index-create_005fnew_003cColor_003e-176"></a></var><br>
+ &mdash; : Color* <b>create_new&lt;Color&gt;</b> (<var>const Color&amp; c</var>)<var><a name="index-create_005fnew_003cColor_003e-177"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Colors</code>. 
+ They create a <code>Color</code> on the free store and allocate memory for it using
+ <code>new(Color)</code>.  They return a pointer to the new <code>Color</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Color</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Color&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+      <!-- !! TO DO: -->
+         <p>This function is used in the drawing and filling functions for
+ <code>Path</code> and <code>Solid</code>.  <code>Point::drawdot()</code> should be changed
+ to use it too, but I haven't gotten around to doing this yet. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,89 ----
+ <html lang="en">
+ <head>
+ <title>Color Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="next" href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions" title="Color Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Color-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Color-Reference.html#Color-Reference">Color Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: string <b>name</b><var><a name="index-name-163"></a></var><br>
+ <blockquote><p>The name of the <code>Color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: bool <b>use_name</b><var><a name="index-use_005fname-164"></a></var><br>
+ <blockquote><p>If <code>true</code>, <code>name</code> is written to <code>out_stream</code> when the
+ <code>Color</code> is used for drawing or filling.  Otherwise, the
+ <a name="index-RGB-_0028red_002dgreen_002dblue_0029-165"></a>RGB (red-green-blue) values are written to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-166"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Color</code> has been created by
+ <code>create_new&lt;Color&gt;()</code>, which allocates memory for the
+ <code>Color</code> on the free store.  Otherwise <code>false</code>. 
+ <code>Colors</code> should only ever be dynamically allocated by using
+ <code>create_new&lt;Color&gt;()</code>. 
+ See <a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Reference;;Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>red_part</b><var><a name="index-red_005fpart-167"></a></var><br>
+ &mdash; Variable: real <b>green_part</b><var><a name="index-green_005fpart-168"></a></var><br>
+ &mdash; Variable: real <b>blue_part</b><var><a name="index-blue_005fpart-169"></a></var><br>
+ <blockquote><p>The RGB (red-green-blue) values of the <code>Color</code>. 
+ A <code>real</code> value r is valid for these variables if and
+ only if
+ 0 &lt;= r &lt;= 1. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,94 ----
+ <html lang="en">
+ <head>
+ <title>Color Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions" title="Color Constructors and Setting Functions">
+ <link rel="next" href="Modifying-Colors.html#Modifying-Colors" title="Modifying Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Color-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_003d-178"></a></var><br>
+ <blockquote><p>Sets <code>name</code> to the empty <code>string</code>, <code>use_name</code> to
+ <code>false</code>, and <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code> to <var>c</var>.<code>red_part</code>, <var>c</var>.<code>green_part</code>, and
+ <var>c</var>.<code>blue_part</code>, respectively. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_003d_003d-179"></a></var><br>
+ <blockquote><p>Equality operator.  Returns <code>true</code>, if the <code>red_parts</code>,
+ <code>green_parts</code>, and <code>blue_parts</code> of <code>*this</code> and <var>c</var>
+ are equal, otherwise <code>false</code>.  The <code>names</code> and
+ <code>use_names</code> are not compared. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_0021_003d-180"></a></var><br>
+ <blockquote><p>Inequality operator.  Returns <code>false</code>, if the <code>red_parts</code>,
+ <code>green_parts</code>, and <code>blue_parts</code> of <code>*this</code> and <var>c</var>
+ are equal, otherwise <code>true</code>.  The  <code>names</code> and
+ <code>use_names</code> are not compared. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member function: ostream&amp; <b>operator&lt;&lt;</b> (<var>ostream&amp; o, const Color&amp; c</var>)<var><a name="index-operator_003c_003c-181"></a></var><br>
+ <blockquote><p>Output operator.  Writes the MetaPost code for the <code>Color</code> to
+ <code>out_stream</code> when a <code>Picture</code> is output.  This occurs when
+ the <code>Color</code> has been used as an argument to
+ drawing or filling functions.
+ 
+         <p>If <code>use_name</code> is <code>true</code>, <code>name</code> is written to
+ <code>out_stream</code>.  Otherwise,
+ &ldquo;(<code>red_part</code>, <code>green_part</code>, <code>blue_part</code>)&rdquo; is written to
+ <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Color-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Color-Reference.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,69 ----
+ <html lang="en">
+ <head>
+ <title>Color Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="System-Information.html#System-Information" title="System Information">
+ <link rel="next" href="Input-and-Output.html#Input-and-Output" title="Input and Output">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Color-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Input-and-Output.html#Input-and-Output">Input and Output</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="System-Information.html#System-Information">System Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">16 Color Reference</h2>
+ 
+ <p><a name="index-Color-162"></a>Class <code>Color</code> is defined in <samp><span class="file">colors.web</span></samp>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a>
+ <li><a accesskey="2" href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Color-Operators.html#Color-Operators">Color Operators</a>
+ <li><a accesskey="4" href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a>
+ <li><a accesskey="5" href="Showing-Colors.html#Showing-Colors">Showing Colors</a>
+ <li><a accesskey="6" href="Querying-Colors.html#Querying-Colors">Querying Colors</a>
+ <li><a accesskey="7" href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>
+ <li><a accesskey="8" href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Command-Line-Arguments.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Command-Line-Arguments.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Command-Line-Arguments.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Command-Line-Arguments.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,94 ----
+ <html lang="en">
+ <head>
+ <title>Command Line Arguments - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
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+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
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+ --></style>
+ </head>
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+ <div class="node">
+ <a name="Command-Line-Arguments"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">11.2.2 Command Line Arguments</h4>
+ 
+ <p><samp><span class="command">3dldf</span></samp> can be called with the following
+ <dfn>command line arguments</dfn>.
+ 
+      <dl>
+ <dt><code>--help</code><dd>Prints information about the valid command line options to standard
+ output and exits with return value 0.
+ 
+      <br><dt><code>--silent</code><dd>Suppresses some output to standard output
+ and standard error when <samp><span class="command">3dldf</span></samp> is run
+ 
+      <br><dt><code>--verbose</code><dd>Causes status information to be printed to standard output
+ when <samp><span class="command">3dldf</span></samp> is run.
+ 
+      <br><dt><code>--version</code><dd>Prints the version number of 3DLDF
+ to standard output and exits with return value 0. 
+ </dl>
+ 
+    <p>Currently, <samp><span class="command">3dldf</span></samp> can only handle long options.  &lsquo;<samp><span class="samp">-</span></samp>&rsquo;
+ cannot be substituted for &lsquo;<samp><span class="samp">--</span></samp>&rsquo;.  However, the names of the options
+ themselves can be abbreviated, as long as the abbreviation is
+ unambigous.  For example, &lsquo;<samp><span class="samp">3dldf --h</span></samp>&rsquo; and &lsquo;<samp><span class="samp">3dldf --verb</span></samp>&rsquo; are
+ valid, but &lsquo;<samp><span class="samp">3dldf --ver</span></samp>&rsquo; is not.
+ 
+ <!-- !! TO DO: Put this in large, boldface type like a chapter heading, -->
+ <!-- for the printed output.  Having it be a node caused problems with the -->
+ <!-- Info output.  Using `@iftex' doesn't work, because the nodes are used -->
+ <!-- for making the menus. -->
+ <!-- It has to be here, because of the restrictions on -->
+ <!-- multiple files. -->
+ <!-- Class and Function Reference -->
+ <!-- @c Unless otherwise stated, all of the functions described in the following -->
+ <!-- @c chapters are @dfn{member functions} of the -->
+ <!-- @c the @code{class} currently under discussion. -->
+ <!-- typeglb.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Concept-Index.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Concept-Index.html
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--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Concept-Index.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,171 ----
+ <html lang="en">
+ <head>
+ <title>Concept Index - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Function-Index.html#Function-Index" title="Function Index">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Concept-Index"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Function-Index.html#Function-Index">Function Index</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="unnumbered">Concept Index</h2>
+ 
+ 
+ 
+ <ul class="index-cp" compact>
+ <li><a href="Focuses-Getstart.html#index-animation-76">animation</a>: <a href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a></li>
+ <li><a href="Intersections.html#index-arbitrary-Path-85">arbitrary Path</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-B_002dsplines-896">B-splines</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-B_0040_0027ezier-curves-895">B&eacute;zier curves</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Rotating-Points.html#index-bugs-34">bugs</a>: <a href="Rotating-Points.html#Rotating-Points">Rotating Points</a></li>
+ <li><a href="Converting-EPS-Files.html#index-CD_002dR-_0028Compact-Disk_002c-Recordable_0029-118">CD-R (Compact Disk, Recordable)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Converting-EPS-Files.html#index-Compact-Disk_002c-Recordable-_0028CD_002dR_0029-119">Compact Disk, Recordable (CD-R)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Sources-of-Information.html#index-Comprehensive-_0040TeX_007b_007d-Archive-Network-_0028CTAN_0029-2">Comprehensive TeX Archive Network (CTAN)</a>: <a href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a></li>
+ <li><a href="Drawing-Points-Intro.html#index-connecting-_0040code_007bPoints_007d-48">connecting <code>Points</code></a>: <a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="Intersections.html#index-connectors-90">connectors</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Paths.html#index-connectors-52">connectors</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Intersections.html#index-contributing-to-3DLDF-100">contributing to 3DLDF</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Paths.html#index-control-points-56">control points</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Paths.html#index-controls-55">controls</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Converting-EPS-Files.html#index-convert-_0028ImageMagick_0029-106">convert (ImageMagick)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Sources-of-Information.html#index-CTAN-_0028Comprehensive-_0040TeX_007b_007d-Archive-Network_0029-1">CTAN (Comprehensive TeX Archive Network)</a>: <a href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a></li>
+ <li><a href="Paths.html#index-curl-53">curl</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Geometry.html#index-derivation-892">derivation</a>: <a href="Geometry.html#Geometry">Geometry</a></li>
+ <li><a href="Geometry.html#index-derived-classes-891">derived classes</a>: <a href="Geometry.html#Geometry">Geometry</a></li>
+ <li><a href="Converting-EPS-Files.html#index-display-_0028ImageMagick_0029-117">display (ImageMagick)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Drawing-Points-Intro.html#index-drawing-and-filling-44">drawing and filling</a>: <a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="I_002fO-Functions.html#index-Emacs-229">Emacs</a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-Emacs_002dLisp-128">Emacs-Lisp</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-Encapsulated-PostScript-_0028EPS_0029-127">Encapsulated PostScript (EPS)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-Encapsulated-PostScript-_0028EPS_0029-114">Encapsulated PostScript (EPS)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Metafont-and-MetaPost.html#index-Encapsulated-PostScript-_0028EPS_0029-15">Encapsulated PostScript (EPS)</a>: <a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="Illustrations.html#index-Encapsulated-PostScript-_0028EPS_0029-11">Encapsulated PostScript (EPS)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-EPS-_0028Encapsulated-PostScript_0029-126">EPS (Encapsulated PostScript)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-EPS-_0028Encapsulated-PostScript_0029-113">EPS (Encapsulated PostScript)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Metafont-and-MetaPost.html#index-EPS-_0028Encapsulated-PostScript_0029-14">EPS (Encapsulated PostScript)</a>: <a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="Illustrations.html#index-EPS-_0028Encapsulated-PostScript_0029-10">EPS (Encapsulated PostScript)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-file_002c-output-442">file, output</a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Template-Functions.html#index-function-templates-103">function templates</a>: <a href="Template-Functions.html#Template-Functions">Template Functions</a></li>
+ <li><a href="Manual-Conventions.html#index-function_002c-member-4">function, member</a>: <a href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="Intersections.html#index-future-plans-99">future plans</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-help-lines-452">help lines</a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Surface-Hiding.html#index-hidden-surface-algorithm-79">hidden surface algorithm</a>: <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="Transforms.html#index-homogeneous-coordinates-36">homogeneous coordinates</a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Transforms.html#index-identity-matrix-38">identity matrix</a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Converting-EPS-Files.html#index-ImageMagick-104">ImageMagick</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Converting-EPS-Files.html#index-ImageMagick-convert-105">ImageMagick convert</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Converting-EPS-Files.html#index-ImageMagick-display-116">ImageMagick display</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-input-routine-21">input routine</a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Intersections.html#index-intersection-81">intersection</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Intersections.html#index-intersection-points-82">intersection points</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Intersections.html#index-intersection-theory-97">intersection theory</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-invariance_002c-projective-902">invariance, projective</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Inverting-Transforms.html#index-inversion-43">inversion</a>: <a href="Inverting-Transforms.html#Inverting-Transforms">Inverting Transforms</a></li>
+ <li><a href="Utility-Functions.html#index-kludge-887">kludge</a>: <a href="Utility-Functions.html#Utility-Functions">Utility Functions</a></li>
+ <li><a href="Path-Data-Members.html#index-linear-_0040code_007bPaths_007d-527">linear <code>Paths</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Drawing-Points-Intro.html#index-lines_002c-drawing-47">lines, drawing</a>: <a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="I_002fO-Functions.html#index-local-variable-lists-228">local variable lists</a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Inverting-Transforms.html#index-matrix-inversion-42">matrix inversion</a>: <a href="Inverting-Transforms.html#Inverting-Transforms">Inverting Transforms</a></li>
+ <li><a href="Transforms.html#index-matrix-operations-40">matrix operations</a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Transforms.html#index-matrix_002c-identity-39">matrix, identity</a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-measurement-units-19">measurement units</a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Manual-Conventions.html#index-member-function-3">member function</a>: <a href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="Metafont-and-MetaPost.html#index-Metafont-12">Metafont</a>: <a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="Metafont-and-MetaPost.html#index-MetaPost-13">MetaPost</a>: <a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="Multi_002dThreading.html#index-multi_002dthreading-910">multi-threading</a>: <a href="Multi_002dThreading.html#Multi_002dThreading">Multi-Threading</a></li>
+ <li><a href="Geometry.html#index-multiple-inheritance-890">multiple inheritance</a>: <a href="Geometry.html#Geometry">Geometry</a></li>
+ <li><a href="Intersections.html#index-non_002darbitrary-Path-92">non-arbitrary Path</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-898">non-uniform rational B-splines (NURBS)</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-897">NURBS (non-uniform rational B-splines)</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Transforms.html#index-operations_002c-matrix-41">operations, matrix</a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-output-file-441">output file</a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Intersections.html#index-output-file-84">output file</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Pictures.html#index-output-file-69">output file</a>: <a href="Pictures.html#Pictures">Pictures</a></li>
+ <li><a href="Pictures.html#index-output-files-72">output files</a>: <a href="Pictures.html#Pictures">Pictures</a></li>
+ <li><a href="Surface-Hiding.html#index-painter_0027s-algorithm-80">painter's algorithm</a>: <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-patches-899">patches</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Intersections.html#index-Path-connectors-91">Path connectors</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Intersections.html#index-Path-intersections-83">Path intersections</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Paths.html#index-paths-51">paths</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-pen-expression-443">pen expression</a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Drawing-Points-Intro.html#index-pens-45">pens</a>: <a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#index-PNG-_0028Portable-Network-Graphics_0029-911">PNG (Portable Network Graphics)</a>: <a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-PNG-_0028Portable-Network-Graphics_0029-120">PNG (Portable Network Graphics)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-PNG-_0028Portable-Network-Graphics_0029-107">PNG (Portable Network Graphics)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Illustrations.html#index-PNG-_0028Portable-Network-Graphics_0029-6">PNG (Portable Network Graphics)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Drawing-Points-Intro.html#index-g_t_0040code_007bPoints_007d_002c-connecting-49"><code>Points</code>, connecting</a>: <a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#index-Portable-Network-Graphics-_0028PNG_0029-912">Portable Network Graphics (PNG)</a>: <a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-Portable-Network-Graphics-_0028PNG_0029-121">Portable Network Graphics (PNG)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-Portable-Network-Graphics-_0028PNG_0029-108">Portable Network Graphics (PNG)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Illustrations.html#index-Portable-Network-Graphics-_0028PNG_0029-7">Portable Network Graphics (PNG)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-PostScript-_0028PS_0029-123">PostScript (PS)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-PostScript-_0028PS_0029-110">PostScript (PS)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Illustrations.html#index-PostScript-_0028PS_0029-9">PostScript (PS)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-PostScript_002c-structured-125">PostScript, structured</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-PostScript_002c-structured-112">PostScript, structured</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-projective-invariance-901">projective invariance</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-PS-_0028PostScript_0029-122">PS (PostScript)</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-PS-_0028PostScript_0029-109">PS (PostScript)</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Illustrations.html#index-PS-_0028PostScript_0029-8">PS (PostScript)</a>: <a href="Illustrations.html#Illustrations">Illustrations</a></li>
+ <li><a href="Pictures.html#index-raw-MetaPost-code-73">raw MetaPost code</a>: <a href="Pictures.html#Pictures">Pictures</a></li>
+ <li><a href="Shadows.html#index-reflections-908">reflections</a>: <a href="Shadows.html#Shadows">Shadows</a></li>
+ <li><a href="Color-Data-Members.html#index-RGB-_0028red_002dgreen_002dblue_0029-165">RGB (red-green-blue)</a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Shadows.html#index-shading-909">shading</a>: <a href="Shadows.html#Shadows">Shadows</a></li>
+ <li><a href="Shadows.html#index-shadows-907">shadows</a>: <a href="Shadows.html#Shadows">Shadows</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-spline-curves-894">spline curves</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-splines-893">splines</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-structured-PostScript-124">structured PostScript</a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files.html#index-structured-PostScript-111">structured PostScript</a>: <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="Surface-Hiding.html#index-surface-hiding-78">surface hiding</a>: <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="Curves-and-Surfaces.html#index-surface-patches-900">surface patches</a>: <a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="Manual-Conventions.html#index-symbols-5">symbols</a>: <a href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-system-dependencies-148">system dependencies</a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Template-Functions.html#index-template-functions-102">template functions</a>: <a href="Template-Functions.html#Template-Functions">Template Functions</a></li>
+ <li><a href="Template-Functions.html#index-templates-101">templates</a>: <a href="Template-Functions.html#Template-Functions">Template Functions</a></li>
+ <li><a href="Paths.html#index-tension-54">tension</a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Intersections.html#index-theory-of-intersection-98">theory of intersection</a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-TO-DO-150">TO DO</a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Projections.html#index-TO-DO-74">TO DO</a>: <a href="Projections.html#Projections">Projections</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-units-of-measurement-20">units of measurement</a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+    </ul></body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Contributing-to-3DLDF.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Contributing-to-3DLDF.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Contributing-to-3DLDF.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Contributing-to-3DLDF.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Contributing to 3DLDF - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="next" href="Using-3DLDF.html#Using-3DLDF" title="Using 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Contributing-to-3DLDF"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Using-3DLDF.html#Using-3DLDF">Using 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Introduction.html#Introduction">Introduction</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.7 Contributing to 3DLDF</h3>
+ 
+ <p>So far, I've been the sole author and user of 3DLDF. 
+ I would be very interested in having other programmers contribute to
+ it.  I would be particularly interested in help in making 3DLDF conform
+ as  closely as possible to the GNU Coding Standards.  I would be
+ grateful if someone would write proper Automake and Autoconf files,
+ since I haven't yet learned how to do so (I'm working on it).
+ 
+    <p>See <a href="Introduction.html#Introduction">Introduction</a>, for information on how to contact the author.
+ 
+ <!-- @c Got rid of getstart.texi, because it confuses Emacs and makeinfo -->
+ <!-- @c to have files nested too deeply. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files-ELISP.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files-ELISP.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files-ELISP.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files-ELISP.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,111 ----
+ <html lang="en">
+ <head>
+ <title>Converting EPS Files ELISP - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Converting-EPS-Files.html#Converting-EPS-Files" title="Converting EPS Files">
+ <link rel="prev" href="Converting-EPS-Files.html#Converting-EPS-Files" title="Converting EPS Files">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Converting-EPS-Files-ELISP"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">11.2.1.1 Emacs-Lisp Functions</h5>
+ 
+ <p><a name="index-PNG-_0028Portable-Network-Graphics_0029-120"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-121"></a><a name="index-PS-_0028PostScript_0029-122"></a><a name="index-PostScript-_0028PS_0029-123"></a><a name="index-structured-PostScript-124"></a><a name="index-PostScript_002c-structured-125"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-126"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-127"></a><a name="index-Emacs_002dLisp-128"></a>The file <samp><span class="file">3DLDF-1.1.5.1/CWEB/cnepspng.el</span></samp> contains
+ definitions of two Emacs-Lisp functions that can be used to
+ convert Encapsulated PostScript (EPS) files to structured PostScript
+ (PS) and Portable Network Graphics (PNG) files.
+ 
+ <div class="defun">
+ &mdash; Emacs-Lisp function: <b>convert-eps</b><var> filename do-not-delete-files<a name="index-convert_002deps-129"></a></var><br>
+ <blockquote><p>Converts an EPS image file to the PS and PNG formats.
+ 
+         <p>If called interactively, <samp><span class="command">convert-eps</span></samp> prompts for the
+ filename, including the extension, of an
+ EPS image file.  It follows the procedure described above in
+ <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>, to create
+ <samp><var>filename</var><span class="file">.ps</span></samp> and <samp><var>filename</var><span class="file">.png</span></samp>.
+ 
+         <p>If <var>do-not-delete-files</var> is <code>nil</code>,
+ the <samp><span class="file">.tex</span></samp>, <samp><span class="file">.dvi</span></samp>, and <samp><span class="file">.log</span></samp> files will be deleted. 
+ This is the case when <samp><span class="command">convert-eps</span></samp> is called interactively
+ with no prefix argument. 
+ If <samp><span class="command">convert-eps</span></samp> is called interactively with a prefix
+ argument, or non-interactively with a non-<code>nil</code>
+ <var>do-not-delete-files</var> argument, these files will not be deleted. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Emacs-Lisp function: <b>convert-eps-loop</b><var> arg start end<a name="index-convert_002deps_002dloop-130"></a></var><br>
+ <blockquote><p>Converts a set of EPS image files to the PS and PNG formats. 
+ The files
+ must all have the same filename, and the extensions must form a range of
+ positive integers.  For example, <samp><span class="command">convert-eps-loop</span></samp> can be
+ used to convert the files <samp><span class="file">3DLDFmp.1</span></samp>, <samp><span class="file">3DLDFmp.2</span></samp>, and
+ <samp><span class="file">3DLDFmp.3</span></samp> to <samp><span class="file">3DLDFmp.1.ps</span></samp>, <samp><span class="file">3DLDFmp.2.ps</span></samp>, and
+ <samp><span class="file">3DLDFmp.3.ps</span></samp> on the one hand, and
+ <samp><span class="file">3DLDFmp.1.png</span></samp>, <samp><span class="file">3DLDFmp.2.png</span></samp>,
+ <samp><span class="file">3DLDFmp.3.png</span></samp> on the other.
+ 
+         <p>If <samp><span class="command">convert-eps-loop</span></samp> is called interactively,
+ it prompts for <var>filename</var> <em>with no extension</em>
+ and the starting and ending numbers of the range.
+ 
+         <p>For all i \in \INT and <var>start</var> \le i \le <var>end</var>,
+ <samp><span class="command">convert-eps-loop</span></samp> checks whether a file named
+ <samp><var>filename.i</var></samp> exists.  If it does,
+ it calls <samp><span class="command">convert-eps</span></samp>, passing
+ <samp><var>filename.i</var></samp> as the latter's <var>filename</var> argument.
+ 
+         <p><var>do-not-delete-files</var> is also passed to <samp><span class="command">convert-eps</span></samp>.  If
+ it's <code>nil</code>,
+ the <samp><span class="file">.tex</span></samp>, <samp><span class="file">.dvi</span></samp>, and <samp><span class="file">.log</span></samp> files will be deleted. 
+ This is the case when <samp><span class="command">convert-eps-loop</span></samp> is called interactively
+ with no prefix argument. 
+ If <samp><span class="command">convert-eps-loop</span></samp> is called interactively with a prefix
+ argument, or non-interactively with a non-<code>nil</code>
+ <var>do-not-delete-files</var> argument, these files will not be deleted. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Converting-EPS-Files.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,154 ----
+ <html lang="en">
+ <head>
+ <title>Converting EPS Files - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Running-3DLDF.html#Running-3DLDF" title="Running 3DLDF">
+ <link rel="prev" href="Running-3DLDF.html#Running-3DLDF" title="Running 3DLDF">
+ <link rel="next" href="Command-Line-Arguments.html#Command-Line-Arguments" title="Command Line Arguments">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Converting-EPS-Files"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Command-Line-Arguments.html#Command-Line-Arguments">Command Line Arguments</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">11.2.1 Converting EPS Files</h4>
+ 
+ <p><a name="index-ImageMagick-104"></a><a name="index-ImageMagick-convert-105"></a><a name="index-convert-_0028ImageMagick_0029-106"></a><a name="index-PNG-_0028Portable-Network-Graphics_0029-107"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-108"></a><a name="index-PS-_0028PostScript_0029-109"></a><a name="index-PostScript-_0028PS_0029-110"></a><a name="index-structured-PostScript-111"></a><a name="index-PostScript_002c-structured-112"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-113"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-114"></a><a href="http://www.imagemagick.org">ImageMagick</a> is a
+ &ldquo;collection of tools and libraries&rdquo; for image manipulation. 
+ It provides a `<tt>convert</tt>' utility which can convert images from one
+ format to another.  It can convert structured PostScript (PS) to
+ to <a href="http://www.libpng.org/pub/png/index.html">Portable Network Graphics (PNG)</a>, but <em>not</em>
+ EPS (Encapsulated PostScript) to PNG.  Nor can it convert EPS to
+ structured PostScript.
+ 
+    <p>It is possible to have MetaPost generate structured PostScript directly
+ by including the command &lsquo;<samp><span class="samp">prologues:=1;</span></samp>&rsquo; at the beginning of the
+ MetaPost input. 
+ However, this &ldquo;generally doesn't work when you use TeX
+ fonts.&rdquo;<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ This is a significant problem if your labels contain math mode
+ material, and you haven't already taken steps to ensure that appropriate
+ fonts will be used in the PS output.
+ 
+    <p>In the following, I describe the <em>only way</em> I've found to convert
+ an EPS image to PNG format while still using TeX fonts.  There may be
+ other and better ways of doing this, but I haven't found them.
+ 
+      <ol type=1 start=1>
+ <li>Assume the EPS image is in the file <samp><span class="file">3DLDFmp.1</span></samp>
+ Include the EPS image in a TeX file
+ which looks like this:
+ 
+      <pre class="example">          \advance\voffset by -1in
+           \advance\hoffset by -1in
+           \nopagenumbers
+           \input epsf
+           \epsfverbosetrue
+           \def\epsfsize#1#2{#1}
+           \setbox0=\vbox{\epsffile{3DLDFmp.1}}
+           \vsize=\ht0
+           \hsize=\wd0
+           \special{papersize=\the\wd0,\the\ht0}
+           \box0
+           \bye
+ </pre>
+      <p><b>Do not</b> name this file <samp><span class="file">3DLDFmp.1.tex</span></samp>! 
+ While this worked fine for me on a DECalpha Personal Workstation
+ running under Tru64 Unix 5.1, with TeX, Version 3.1415
+ (C version 6.1), and <b>dvipsk</b> 5.58f,
+ it failed on a PC Pentium II XEON under Linux 2.4,
+ with TeX, Version 3.14159 (Web2C 7.4.5), and
+ <b>dvips(k)</b> 5.92b, kpathsea version 3.4.5,
+ with the following error message:
+      <pre class="display">          &ldquo;No BoundingBox comment found in file examples.1; using defaults&rdquo;
+ </pre>
+      <p class="noindent">The resulting PS image had the wrong size and the
+ the graphic was positioned improperly.
+ 
+      <p>Apparently, it confuses the EPSF macros when the name of an
+ included image is the same as &lsquo;<samp><span class="samp">\jobname</span></samp>&rsquo;. 
+ So, for this example, let's call it <samp><span class="file">3DLDFmp.1_.tex</span></samp>.
+ 
+      <p>You don't really need to call the macro &lsquo;<samp><span class="samp">\epsfverbosetrue</span></samp>&rsquo;.  If you
+ do, it will print the measurements of the bounding box and other information
+ to standard output.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+      <li>Run &lsquo;<samp><span class="samp">tex 3DLDFmp.1_.tex</span></samp>&rsquo;.
+ 
+      <li>Run &lsquo;<samp><span class="samp">dvips -o 3DLDF.1.ps 3DLDFmp.1_.dvi</span></samp>&rsquo;.
+ 
+      <li>Run &lsquo;<samp><span class="samp">convert 3DLDF.1.ps 3DLDFmp.1.png</span></samp>&rsquo;.
+         </ol>
+ 
+    <p><a name="index-ImageMagick-115"></a><a name="index-ImageMagick-display-116"></a><a name="index-display-_0028ImageMagick_0029-117"></a><a href="http://www.imagemagick.org">ImageMagick</a>
+ supplies a `<samp><span class="command">display</span></samp>' utility, which can be used to display the
+ PNG image:
+ 
+ <pre class="example">     display 3DLDFmp.1.png
+ </pre>
+    <p>It can be included in an HTML document as follows:
+ 
+ <pre class="example">     &lt;img src="3DLDFmp.1.png"
+               alt="[Fig. 1]."
+ </pre>
+    <p><a name="index-CD_002dR-_0028Compact-Disk_002c-Recordable_0029-118"></a><a name="index-Compact-Disk_002c-Recordable-_0028CD_002dR_0029-119"></a><b>Please note!</b>  The PNG files for this manual are now called
+ filename <samp><span class="file">3DLDF1.png</span></samp>,  <samp><span class="file">3DLDF2.png</span></samp>, <small class="dots">...</small>,
+ <samp><span class="file">3DLDF199.png</span></samp>,
+ because I wasn't able to write files
+ with names like <samp><span class="file">3DLDFmp.&lt;</span><i>number</i><span class="file">&gt;.png</span></samp> to a CD-R (Compact
+ Disk, Recordable), when `<i>number</i>' had more than one digit.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Hobby, <cite>A User's Manual for MetaPost</cite>, pp.&nbsp;<!-- /@w -->21&ndash;22.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Rokicki, <cite>Dvips: A DVI-to-PostScript Translator</cite>, p.&nbsp;<!-- /@w -->24.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Labels.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Labels.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Labels.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Labels.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Copying Labels - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link rel="prev" href="Label-Data-Members.html#Label-Data-Members" title="Label Data Members">
+ <link rel="next" href="Outputting-Labels.html#Outputting-Labels" title="Outputting Labels">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Copying-Labels"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Labels.html#Outputting-Labels">Outputting Labels</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Label-Reference.html#Label-Reference">Label Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">20.2 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> Function: Label* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-299"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Label</code> and returns a pointer to the copy. 
+ Called in <code>Picture::operator=()</code> and <code>Picture::operator+=()</code>
+ where <code>Pictures</code> are copied. 
+ Users should never need to call this function directly. 
+ See <a href="Picture-Operators.html#Picture-Operators">Picture Reference; Operators</a>.
+ 
+         <p>This function dynamically allocates a new
+ <code>Label</code> and a new <code>Point</code> within the <code>Label</code>, and copies
+ the <code>strings</code> from <code>*this</code> to the new <code>Label</code>.  The
+ standard library functions for <code>strings</code> take care of the
+ allocation for the <code>string</code> members of <code>Label</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Copying Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Appending-to-Paths.html#Appending-to-Paths" title="Appending to Paths">
+ <link rel="next" href="Clearing-Paths.html#Clearing-Paths" title="Clearing Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Copying-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Clearing-Paths.html#Clearing-Paths">Clearing Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Appending-to-Paths.html#Appending-to-Paths">Appending to Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.6 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-561"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Path</code> using <code>create_new&lt;Path&gt;()</code>, which
+ returns a pointer to <code>Path</code>.  <code>get_copy()</code> then
+ casts this pointer to a pointer to <code>Shape</code> and returns it.
+ 
+         <p>This function is used when copying <code>Pictures</code> and in
+ <code>Solid::output()</code>, where objects of types derived from <code>Shape</code>
+ must be handled in the same way, without their actual types being known. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Copying Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Operators.html#Point-Operators" title="Point Operators">
+ <link rel="next" href="Querying-Points.html#Querying-Points" title="Querying Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Copying-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Points.html#Querying-Points">Querying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Operators.html#Point-Operators">Point Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.7 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-398"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Point</code>, and allocates memory for it on the
+ free store using <code>create_new&lt;Point&gt;()</code>. 
+ It returns a pointer to <code>Shape</code> that points to the new <code>Point</code>. 
+ This function is used in the drawing commands for putting <code>Points</code>
+ onto <code>Pictures</code>. 
+ See <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Reference; Drawing</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Shapes.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Shapes.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Copying Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Shape-Operators.html#Shape-Operators" title="Shape Operators">
+ <link rel="next" href="Modifying-Shapes.html#Modifying-Shapes" title="Modifying Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Copying-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Shapes.html#Modifying-Shapes">Modifying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shape-Operators.html#Shape-Operators">Shape Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.3 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-242"></a></var><br>
+ <blockquote><p>Copies an object, allocating memory on the free store for the copy,
+ and returns a pointer to <code>Shape</code> for accessing the copy.
+ 
+         <p>Used in the drawing and filling functions for copying the <code>Shape</code>,
+ and putting a pointer to the copy onto the <code>vector&lt;Shape*&gt; shapes</code>
+ of the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Copying-Solids.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Copying-Solids.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Copying Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Solid-Operators.html#Solid-Operators" title="Solid Operators">
+ <link rel="next" href="Setting-Solid-Members.html#Setting-Solid-Members" title="Setting Solid Members">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Copying-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Setting-Solid-Members.html#Setting-Solid-Members">Setting Solid Members</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Operators.html#Solid-Operators">Solid Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.5 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_copy</b> (<code>void</code>)<var><a name="index-get_005fcopy-796"></a></var><br>
+ <blockquote><p>Dynamically allocates a new <code>Solid</code> on the free store, using
+ <code>create_new&lt;Solid&gt;()</code>, and makes it a copy of <code>*this</code>.  Then, a
+ pointer to <code>Shape</code> is pointed at the copy and returned.  Used for
+ putting <code>Solids</code> onto <code>Picture::shapes</code> in the drawing and
+ filling functions for <code>Solid</code>. 
+ See <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,116 ----
+ <html lang="en">
+ <head>
+ <title>Cuboid Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link rel="prev" href="Cuboid-Data-Members.html#Cuboid-Data-Members" title="Cuboid Data Members">
+ <link rel="next" href="Cuboid-Operators.html#Cuboid-Operators" title="Cuboid Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cuboid-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Cuboid-Operators.html#Cuboid-Operators">Cuboid Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">36.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Cuboid</b> (<code>void</code>)<var><a name="index-Cuboid-844"></a></var><br>
+ <blockquote><p>Creates an empty <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Cuboid</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-Cuboid-845"></a></var><br>
+ <blockquote><p>Creates a new <code>Cuboid</code> and makes it a copy of <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Cuboid</b> (<var>const Point&amp; c, const real h, const real w, const real d, </var>[<var>const real x = 0, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]]])<var><a name="index-Cuboid-846"></a></var><br>
+ <blockquote><p>Creates a <code>Cuboid</code> with <code>center</code> at the origin, with
+ <code>height</code> == <var>h</var>, <code>width</code> == <var>w</var>, and
+ <code>depth</code> == <var>d</var>.  If <var>x</var>, <var>y</var>, or <var>z</var> is
+ non-zero, the <code>Cuboid</code> is rotated by the amounts indicated around
+ the corresponding main axes.  Finally, the
+ <code>Cuboid</code> is shifted such that <code>center</code> comes to lie at
+ <var>c</var>.
+ 
+      <pre class="example">          Point P(-3, -2, 12);
+           Cuboid c(P, 3, 5, 2.93, 35, 10, 60);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF186.png"
+ alt="[Figure 186. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 186. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Cuboid* <b>create_new&lt;Cuboid&gt;</b> (<var>const Cuboid* c</var>)<var><a name="index-create_005fnew_003cCuboid_003e-847"></a></var><br>
+ &mdash; : Cuboid* <b>create_new&lt;Cuboid&gt;</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-create_005fnew_003cCuboid_003e-848"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Cuboids</code>. 
+ They create a <code>Cuboid</code> on the free store and allocate memory for it using
+ <code>new(Cuboid)</code>.  They return a pointer to the new <code>Cuboid</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Cuboid</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Cuboid&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Destructor: void <b>~Cuboid</b> (<code>void</code>)<var><a name="index-g_t_007eCuboid-849"></a></var><br>
+ <blockquote><p>Deallocates the <code>Rectangles</code> pointed to by the pointers on
+ <code>rectangles</code> (a <code>Solid</code> data member), and calls
+ <code>rectangles.clear()</code>.  <code>Cuboids</code> consist entirely of
+ <code>Rectangles</code>, so nothing must be done to the other vectors. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Cuboid Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link rel="prev" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link rel="next" href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions" title="Cuboid Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
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+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cuboid-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">36.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variables: real <b>height</b><var><a name="index-height-841"></a></var><br>
+ &mdash; : real <b>width</b><var><a name="index-width-842"></a></var><br>
+ &mdash; : real <b>depth</b><var><a name="index-depth-843"></a></var><br>
+ <blockquote><p>The height, width, and depth of the <code>Cuboid</code>, respectively.
+ 
+         <p>Please note, that &ldquo;<code>height</code>&rdquo;, &ldquo;<code>width</code>&rdquo;, and
+ &ldquo;<code>depth</code>&rdquo; are conventional terms.  There are no restrictions on
+ the orientation of a <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Getstart.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Getstart.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Cuboid Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Figures.html#Solid-Figures" title="Solid Figures">
+ <link rel="prev" href="Solid-Figures.html#Solid-Figures" title="Solid Figures">
+ <link rel="next" href="Polyhedron-Getstart.html#Polyhedron-Getstart" title="Polyhedron Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cuboid-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Figures.html#Solid-Figures">Solid Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Figures.html#Solid-Figures">Solid Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">8.1 Cuboids</h3>
+ 
+ <p><a name="index-Cuboid-63"></a>A <dfn>cuboid</dfn> is a solid figure consisting of six rectangular faces
+ that meet at right angles.  A cube is a special form of cuboid, whose
+ faces are all squares.  The constructor for the class <code>Cuboid</code>
+ follows the pattern familiar from the constructors for the plane
+ figures:  The first argument is the center of the <code>Cuboid</code>,
+ followed by three <code>real</code> arguments for the height, width, and
+ depth, and then three more <code>real</code> arguments for the angles of
+ rotation about the x, y, and z-axes.  The <code>Cuboid</code> is first
+ constructed with its center at the origin.  Its width, height, and depth
+ are measured along the x, y, and z-axes respectively.  If rotations are
+ specified, it is rotated about the x, y, z-axes in that order.  Finally,
+ it is shifted such that its center comes to lie on its <code>Point</code>
+ argument, if the latter is not the origin.
+ 
+    <p>If the width, height, and depth arguments are equal, the <code>Cuboid</code>
+ is a cube:
+ 
+ <pre class="example">     Cuboid c0(origin, 3, 3, 3, 0, 30);
+      c0.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF37.png"
+ alt="[Figure 37. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 37. 
+ <br>
+ </p>
+ 
+    <p>In the following example, the <code>Cuboid</code> is &ldquo;filldrawn&rdquo;, so that
+ the lines dilineating the hidden surfaces of the <code>Cuboid</code> are
+ covered.
+ 
+ <pre class="example">     Cuboid c1(origin, 3, 4, 5, 0, 30);
+      c1.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF38.png"
+ alt="[Figure 38. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 38. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Operators.html
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Cuboid Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link rel="prev" href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions" title="Cuboid Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cuboid-Operators"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">36.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-operator_003d-850"></a></var><br>
+ <blockquote><p>Makes the <code>Cuboid</code> a copy of <var>c</var>.  The old contents of <code>*this</code>
+ are deallocated (where necessary) and discarded. 
+ </p></blockquote></div>
+ 
+ <!-- polyhed.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Cuboid-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Cuboid-Reference.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Cuboid Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Faced-Solid-Reference.html#Faced-Solid-Reference" title="Faced Solid Reference">
+ <link rel="next" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Cuboid-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">36 Cuboid Reference</h2>
+ 
+ <p><a name="index-Cuboid-840"></a>Class <code>Cuboid</code> is defined in <samp><span class="file">cuboid.web</span></samp>. 
+ It is derived from <code>Solid_Faced</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a>
+ <li><a accesskey="2" href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Cuboid-Operators.html#Cuboid-Operators">Cuboid Operators</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Curves-and-Surfaces.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Curves-and-Surfaces.html
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+ <html lang="en">
+ <head>
+ <title>Curves and Surfaces - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="prev" href="Geometry.html#Geometry" title="Geometry">
+ <link rel="next" href="Shadows.html#Shadows" title="Shadows">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
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+ </head>
+ <body>
+ <div class="node">
+ <a name="Curves-and-Surfaces"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Shadows.html#Shadows">Shadows</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Geometry.html#Geometry">Geometry</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Future-Plans.html#Future-Plans">Future Plans</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">40.2 Curves and Surfaces</h3>
+ 
+ <p><a name="index-splines-893"></a><a name="index-spline-curves-894"></a><a name="index-B_0040_0027ezier-curves-895"></a><a name="index-B_002dsplines-896"></a><a name="index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-897"></a><a name="index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-898"></a><a name="index-patches-899"></a><a name="index-surface-patches-900"></a>3D modelling software usually supports the creation and manipulation of
+ various kinds of <dfn>spline curves</dfn>: <dfn>B&eacute;zier curves</dfn>,
+ <dfn>B-splines</dfn>, and <dfn>non-uniform rational B-splines</dfn> or
+ <dfn>NURBS</dfn>.  These curves can be used for generating surfaces.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+    <p><a name="index-projective-invariance-901"></a><a name="index-invariance_002c-projective-902"></a><code>paths</code> in Metafont and MetaPost are B&eacute;zier curves. 
+ It would be possible to implement three-dimensional B&eacute;zier curves in
+ 3DLDF, but unfortunately they are not <dfn>projectively invariant</dfn>:
+ 
+    <p>Let c_0 represent a B&eacute;zier curve in three dimensions,
+ P the control points of c_0, and
+ t a projection transformation. 
+ Further, let Q represent the points generated from applying
+ t to P, and c_1 the curve generated from Q. 
+ Finally, let R represent the points generated from applying
+ t to all of the points on c_0, and
+  c_2 the curve through R:
+ c_1 \not\equiv c_2.
+ 
+    <p><a name="index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-903"></a><a name="index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-904"></a><a name="index-projective-invariance-905"></a><a name="index-invariance_002c-projective-906"></a>NURBS, on the other hand, are projectively invariant,<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ so I will probably
+ concentrate on implementing them.  On the other hand, it would be nice
+ to be able to implement Metafont's way of specifying <code>paths</code>
+ using `<code>curl</code>', `<code>tension</code>', and `<code>dir</code>' in 3DLDF. 
+ This may prove to be difficult or impossible.  I do not yet know
+ whether Metafont's <code>path</code> creation algorithm can be generalized to
+ three dimensions.<a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>
+ 
+    <p>Curves and surfaces are advanced topics, so it may be a while
+ before I implement them in 3DLDF.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Huw Jones,
+ <i>Computer Graphics through Key Mathematics</i>, and
+ David Salomon,
+ <i>Computer Graphics and Geometric Modeling</i>, are my main sources of
+ information about spline curves.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Jones, Huw. 
+ <i>Computer Graphics through Key Mathematics</i>, p.&nbsp;<!-- /@w -->282.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>, p.&nbsp;<!-- /@w -->130, and
+ Hobby, John D. 
+ <i>Smooth, Easy to Compute Interpolating Splines</i>. 
+ Discrete and Computational Geometery 1(2).</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Data-Type-and-Variable-Index.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Data-Type-and-Variable-Index.html
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--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Data-Type-and-Variable-Index.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,305 ----
+ <html lang="en">
+ <head>
+ <title>Data Type and Variable Index - 3DLDF User and Reference Manual</title>
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+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
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+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Function-Index.html#Function-Index">Function Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License">GNU Free Documentation License</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="unnumbered">Data Type and Variable Index</h2>
+ 
+ <ul class="index-vr" compact>
+ <li><a href="Focus-Data-Members.html#index-angle-478"><code>angle</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Truncated-Octahedron-Data-Members.html#index-angle_005fhex_005fhex-881"><code>angle_hex_hex</code></a>: <a href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="Truncated-Octahedron-Data-Members.html#index-angle_005fhex_005fsquare-880"><code>angle_hex_square</code></a>: <a href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-arrow-536"><code>arrow</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-axis-479"><code>axis</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-axis_005fh-712"><code>axis_h</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Rectangle-Data-Members.html#index-axis_005fh-672"><code>axis_h</code></a>: <a href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-axis_005fv-713"><code>axis_v</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Rectangle-Data-Members.html#index-axis_005fv-673"><code>axis_v</code></a>: <a href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="Namespace-Projections.html#index-AXON-329"><code>AXON</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Namespace-Colors.html#index-background_005fcolor-217"><code>background_color</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-background_005fcolor_005fvector-222"><code>background_color_vector</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-black-212"><code>black</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-blue-199"><code>blue</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Color-Data-Members.html#index-blue_005fpart-169"><code>blue_part</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-blue_005fviolet-210"><code>blue_violet</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-bool_005fpair-138"><code>bool_pair</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint-355"><code>bool_point</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint_005fpair-359"><code>bool_point_pair</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint_005fquadruple-360"><code>bool_point_quadruple</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-bool_005freal-139"><code>bool_real</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005freal_005fpoint-364"><code>bool_real_point</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Solid-Data-Members.html#index-center-776"><code>center</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Data-Members.html#index-center-693"><code>center</code></a>: <a href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a></li>
+ <li><a href="Polygon-Data-Members.html#index-center-637"><code>center</code></a>: <a href="Polygon-Data-Members.html#Polygon-Data-Members">Polygon Data Members</a></li>
+ <li><a href="Solid-Data-Members.html#index-CIRCLE-784"><code>CIRCLE</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Circle-Reference.html#index-Circle-759"><code>Circle</code></a>: <a href="Circle-Reference.html#Circle-Reference">Circle Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Circle-57"><code>Circle</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Solid-Data-Members.html#index-circles-779"><code>circles</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Color-Reference.html#index-Color-162"><code>Color</code></a>: <a href="Color-Reference.html#Color-Reference">Color Reference</a></li>
+ <li><a href="Path-Data-Members.html#index-connectors-539"><code>connectors</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Cuboid-Reference.html#index-Cuboid-840"><code>Cuboid</code></a>: <a href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a></li>
+ <li><a href="Cuboid-Getstart.html#index-Cuboid-63"><code>Cuboid</code></a>: <a href="Cuboid-Getstart.html#Cuboid-Getstart">Cuboid Getstart</a></li>
+ <li><a href="Point-Data-Members.html#index-CURR_005fY-352"><code>CURR_Y</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-CURR_005fZ-353"><code>CURR_Z</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-cyan-200"><code>cyan</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Path-Data-Members.html#index-cycle_005fswitch-528"><code>cycle_switch</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-dashed-534"><code>dashed</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-default_005fbackground-216"><code>default_background</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-default_005fcolor-218"><code>default_color</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-default_005fcolor_005fvector-220"><code>default_color_vector</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Focus-Global-Variables.html#index-default_005ffocus-482"><code>default_focus</code></a>: <a href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Global Variables</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-DEFAULT_005fNUMBER_005fOF_005fPOINTS-714"><code>DEFAULT_NUMBER_OF_POINTS</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Cuboid-Data-Members.html#index-depth-843"><code>depth</code></a>: <a href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="Icosahedron-Data-Members.html#index-dihedral_005fangle-872"><code>dihedral_angle</code></a>: <a href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">Icosahedron Data Members</a></li>
+ <li><a href="Dodecahedron-Data-Members.html#index-dihedral_005fangle-865"><code>dihedral_angle</code></a>: <a href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">Dodecahedron Data Members</a></li>
+ <li><a href="Tetrahedron-Data-Members.html#index-dihedral_005fangle-857"><code>dihedral_angle</code></a>: <a href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">Tetrahedron Data Members</a></li>
+ <li><a href="Line-Data-Members.html#index-direction-501"><code>direction</code></a>: <a href="Line-Data-Members.html#Line-Data-Members">Line Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-direction-475"><code>direction</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Planes-Data-Members.html#index-distance-511"><code>distance</code></a>: <a href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-distance-477"><code>distance</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-do_005fhelp_005flines-542"><code>do_help_lines</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Picture-Data-Members.html#index-do_005flabels-305"><code>do_labels</code></a>: <a href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="Label-Data-Members.html#index-DO_005fLABELS-298"><code>DO_LABELS</code></a>: <a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="Solid-Data-Members.html#index-do_005foutput-777"><code>do_output</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-do_005foutput-530"><code>do_output</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-do_005foutput-350"><code>do_output</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Dodecahedron.html#index-Dodecahedron-864"><code>Dodecahedron</code></a>: <a href="Dodecahedron.html#Dodecahedron">Dodecahedron</a></li>
+ <li><a href="Dodecahedron-Getstart.html#index-Dodecahedron-66"><code>Dodecahedron</code></a>: <a href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">Dodecahedron Getstart</a></li>
+ <li><a href="Label-Data-Members.html#index-dot-295"><code>dot</code></a>: <a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-DRAW-234"><code>DRAW</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-draw_005fcolor-532"><code>draw_color</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-DRAWDOT-233"><code>DRAWDOT</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-drawdot_005fcolor-347"><code>drawdot_color</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-drawdot_005fvalue-346"><code>drawdot_value</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Polyhedron-Data-Members.html#index-edge_005fradius-854"><code>edge_radius</code></a>: <a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="Solid_005fFaced-Data-Members.html#index-edges-839"><code>edges</code></a>: <a href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="Solid-Data-Members.html#index-ELLIPSE-785"><code>ELLIPSE</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Ellipse-Reference.html#index-Ellipse-707"><code>Ellipse</code></a>: <a href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Ellipse-58"><code>Ellipse</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Solid-Data-Members.html#index-ellipses-780"><code>ellipses</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Polyhedron-Data-Members.html#index-face_005fradius-853"><code>face_radius</code></a>: <a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="Solid_005fFaced-Data-Members.html#index-faces-837"><code>faces</code></a>: <a href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-FILL-235"><code>FILL</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-fill_005fcolor-533"><code>fill_color</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-fill_005fdraw_005fvalue-531"><code>fill_draw_value</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-FILLDRAW-236"><code>FILLDRAW</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Focus-Reference.html#index-Focus-473"><code>Focus</code></a>: <a href="Focus-Reference.html#Focus-Reference">Focus Reference</a></li>
+ <li><a href="Focuses-Getstart.html#index-focus-75"><code>focus</code></a>: <a href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-focus0-708"><code>focus0</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-focus1-709"><code>focus1</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-gray-214"><code>gray</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-green-198"><code>green</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Color-Data-Members.html#index-green_005fpart-168"><code>green_part</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-green_005fyellow-206"><code>green_yellow</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Cuboid-Data-Members.html#index-height-841"><code>height</code></a>: <a href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-help_005fcolor-540"><code>help_color</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-help_005fcolor-219"><code>help_color</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-help_005fcolor_005fvector-221"><code>help_color_vector</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Path-Data-Members.html#index-help_005fdash_005fpattern-541"><code>help_dash_pattern</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Truncated-Octahedron-Data-Members.html#index-hexagon_005fradius-882"><code>hexagon_radius</code></a>: <a href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="Icosahedron.html#index-Icosahedron-871"><code>Icosahedron</code></a>: <a href="Icosahedron.html#Icosahedron">Icosahedron</a></li>
+ <li><a href="Icosahedron-Getstart.html#index-Icosahedron-67"><code>Icosahedron</code></a>: <a href="Icosahedron-Getstart.html#Icosahedron-Getstart">Icosahedron Getstart</a></li>
+ <li><a href="Transform-Global-Variables-and-Constants.html#index-IDENTITY_005fTRANSFORM-266"><code>IDENTITY_TRANSFORM</code></a>: <a href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="I_002fO-Global-Variables.html#index-in_005fstream-223"><code>in_stream</code></a>: <a href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="Regular-Polygon-Data-Members.html#index-internal_005fangle-654"><code>internal_angle</code></a>: <a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-INVALID_005fBOOL_005fPOINT-371"><code>INVALID_BOOL_POINT</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-INVALID_005fBOOL_005fPOINT_005fPAIR-372"><code>INVALID_BOOL_POINT_PAIR</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-INVALID_005fBOOL_005fPOINT_005fQUADRUPLE-374"><code>INVALID_BOOL_POINT_QUADRUPLE</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-INVALID_005fBOOL_005fREAL_005fPOINT-373"><code>INVALID_BOOL_REAL_POINT</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="Line-Global-Constants.html#index-INVALID_005fLINE-502"><code>INVALID_LINE</code></a>: <a href="Line-Global-Constants.html#Line-Global-Constants">Line Global Constants</a></li>
+ <li><a href="Planes-Global-Constants.html#index-INVALID_005fPLANE-512"><code>INVALID_PLANE</code></a>: <a href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Global Constants</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-INVALID_005fPOINT-369"><code>INVALID_POINT</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-INVALID_005fREAL-144"><code>INVALID_REAL</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-INVALID_005fREAL_005fPAIR-145"><code>INVALID_REAL_PAIR</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-INVALID_005fREAL_005fSHORT-146"><code>INVALID_REAL_SHORT</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Transform-Global-Variables-and-Constants.html#index-INVALID_005fTRANSFORM-265"><code>INVALID_TRANSFORM</code></a>: <a href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="Namespace-Projections.html#index-ISO-330"><code>ISO</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Label-Reference.html#index-Label-293"><code>Label</code></a>: <a href="Label-Reference.html#Label-Reference">Label Reference</a></li>
+ <li><a href="Picture-Data-Members.html#index-labels-304"><code>labels</code></a>: <a href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-ldf_005freal_005fdouble-141"><code>ldf_real_double</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-ldf_005freal_005ffloat-140"><code>ldf_real_float</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Namespace-Colors.html#index-light_005fgray-215"><code>light_gray</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Line-Reference.html#index-Line-499"><code>Line</code></a>: <a href="Line-Reference.html#Line-Reference">Line Reference</a></li>
+ <li><a href="Path-Data-Members.html#index-line_005fswitch-526"><code>line_switch</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-linear_005feccentricity-710"><code>linear_eccentricity</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-magenta-202"><code>magenta</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Transform-Data-Members.html#index-matrix-263"><code>matrix</code></a>: <a href="Transform-Data-Members.html#Transform-Data-Members">Transform Data Members</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-Matrix-136"><code>Matrix</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-MAX_005fREAL-147"><code>MAX_REAL</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-MAX_005fREAL_005fSQRT-149"><code>MAX_REAL_SQRT</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Namespace-Sorting.html#index-MAX_005fZ-332"><code>MAX_Z</code></a>: <a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="Namespace-Sorting.html#index-MEAN_005fZ-334"><code>MEAN_Z</code></a>: <a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="Point-Data-Members.html#index-measurement_005funits-351"><code>measurement_units</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-measurement_005funits-_0028Point_0029-18"><code>measurement_units (Point)</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Namespace-Sorting.html#index-MIN_005fZ-333"><code>MIN_Z</code></a>: <a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="Color-Data-Members.html#index-name-163"><code>name</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Namespace-Sorting.html#index-NO_005fSORT-331"><code>NO_SORT</code></a>: <a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="Planes-Data-Members.html#index-normal-510"><code>normal</code></a>: <a href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-null_005fcoordinates-143"><code>null_coordinates</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Data-Members.html#index-number_005fof_005fpoints-694"><code>number_of_points</code></a>: <a href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a></li>
+ <li><a href="Polyhedron-Data-Members.html#index-number_005fof_005fpolygon_005ftypes-852"><code>number_of_polygon_types</code></a>: <a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="Ellipse-Data-Members.html#index-numerical_005feccentricity-711"><code>numerical_eccentricity</code></a>: <a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="Solid-Data-Members.html#index-on_005ffree_005fstore-775"><code>on_free_store</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Rectangle-Data-Members.html#index-on_005ffree_005fstore-674"><code>on_free_store</code></a>: <a href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="Regular-Polygon-Data-Members.html#index-on_005ffree_005fstore-657"><code>on_free_store</code></a>: <a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-on_005ffree_005fstore-529"><code>on_free_store</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-on_005ffree_005fstore-345"><code>on_free_store</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Color-Data-Members.html#index-on_005ffree_005fstore-166"><code>on_free_store</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-orange-207"><code>orange</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-orange_005fred-203"><code>orange_red</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Point-Global-Constants-and-Variables.html#index-origin-370"><code>origin</code></a>: <a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="I_002fO-Global-Variables.html#index-out_005fstream-224"><code>out_stream</code></a>: <a href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="Pictures.html#index-out_005fstream-70"><code>out_stream</code></a>: <a href="Pictures.html#Pictures">Pictures</a></li>
+ <li><a href="Namespace-Projections.html#index-PARALLEL_005fX_005fY-326"><code>PARALLEL_X_Y</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Namespace-Projections.html#index-PARALLEL_005fX_005fZ-327"><code>PARALLEL_X_Z</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Namespace-Projections.html#index-PARALLEL_005fZ_005fY-328"><code>PARALLEL_Z_Y</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Solid-Data-Members.html#index-PATH-786"><code>PATH</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Path-Reference.html#index-Path-525"><code>Path</code></a>: <a href="Path-Reference.html#Path-Reference">Path Reference</a></li>
+ <li><a href="Paths.html#index-Path-50"><code>Path</code></a>: <a href="Paths.html#Paths">Paths</a></li>
+ <li><a href="Solid-Data-Members.html#index-paths-778"><code>paths</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-pen-535"><code>pen</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-pen-348"><code>pen</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Dodecahedron-Data-Members.html#index-pentagon_005fradius-866"><code>pentagon_radius</code></a>: <a href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">Dodecahedron Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-persp-481"><code>persp</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Namespace-Projections.html#index-PERSP-325"><code>PERSP</code></a>: <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="Global-Constants-and-Variables.html#index-PI-142"><code>PI</code></a>: <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="Picture-Global-Variables.html#index-Picture-306"><code>Picture</code></a>: <a href="Picture-Global-Variables.html#Picture-Global-Variables">Picture Global Variables</a></li>
+ <li><a href="Picture-Reference.html#index-Picture-301"><code>Picture</code></a>: <a href="Picture-Reference.html#Picture-Reference">Picture Reference</a></li>
+ <li><a href="Pictures.html#index-Picture-68"><code>Picture</code></a>: <a href="Pictures.html#Pictures">Pictures</a></li>
+ <li><a href="Namespace-Colors.html#index-pink-205"><code>pink</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Plane-Reference.html#index-Plane-508"><code>Plane</code></a>: <a href="Plane-Reference.html#Plane-Reference">Plane Reference</a></li>
+ <li><a href="Planes-Data-Members.html#index-point-509"><code>point</code></a>: <a href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="Point-Reference.html#index-Point-339"><code>Point</code></a>: <a href="Point-Reference.html#Point-Reference">Point Reference</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point-16"><code>Point</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point_003a_003ameasurement_005funits-17"><code>Point::measurement_units</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point_003a_003aprojective_005fcoordinates-25"><code>Point::projective_coordinates</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point_003a_003auser_005fcoordinates-23"><code>Point::user_coordinates</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point_003a_003aview_005fcoordinates-24"><code>Point::view_coordinates</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-Point_003a_003aworld_005fcoordinates-22"><code>Point::world_coordinates</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-point_005fpair-354"><code>point_pair</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Path-Data-Members.html#index-points-538"><code>points</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Polygon-Reference.html#index-Polygon-636"><code>Polygon</code></a>: <a href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Polygon-59"><code>Polygon</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Polyhedron-Reference.html#index-Polyhedron-851"><code>Polyhedron</code></a>: <a href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a></li>
+ <li><a href="Polyhedron-Getstart.html#index-Polyhedron-64"><code>Polyhedron</code></a>: <a href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a></li>
+ <li><a href="Line-Data-Members.html#index-position-500"><code>position</code></a>: <a href="Line-Data-Members.html#Line-Data-Members">Line Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-position-474"><code>position</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Label-Data-Members.html#index-position-297"><code>position</code></a>: <a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-projective_005fcoordinates-341"><code>projective_coordinates</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-projective_005fcoordinates-_0028Point_0029-29"><code>projective_coordinates (Point)</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Solid-Data-Members.html#index-projective_005fextremes-783"><code>projective_extremes</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Path-Data-Members.html#index-projective_005fextremes-537"><code>projective_extremes</code></a>: <a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-projective_005fextremes-349"><code>projective_extremes</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Label-Data-Members.html#index-pt-294"><code>pt</code></a>: <a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-purple-209"><code>purple</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Circle-Data-Members.html#index-radius-760"><code>radius</code></a>: <a href="Circle-Data-Members.html#Circle-Data-Members">Circle Data Members</a></li>
+ <li><a href="Regular-Polygon-Data-Members.html#index-radius-655"><code>radius</code></a>: <a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-real-131"><code>real</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-real_005fpair-132"><code>real_pair</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-real_005fshort-137"><code>real_short</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-real_005ftriple-133"><code>real_triple</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Solid-Data-Members.html#index-RECTANGLE-787"><code>RECTANGLE</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Rectangle-Reference.html#index-Rectangle-671"><code>Rectangle</code></a>: <a href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Rectangle-60"><code>Rectangle</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Solid-Data-Members.html#index-rectangles-782"><code>rectangles</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Namespace-Colors.html#index-red-197"><code>red</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Color-Data-Members.html#index-red_005fpart-167"><code>red_part</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Reference.html#index-Reg_005fCl_005fPlane_005fCurve-692"><code>Reg_Cl_Plane_Curve</code></a>: <a href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Reg_005fCl_005fPlane_005fCurve-61"><code>Reg_Cl_Plane_Curve</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Solid-Data-Members.html#index-REG_005fPOLYGON-788"><code>REG_POLYGON</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Regular-Polygon-Reference.html#index-Reg_005fPolygon-653"><code>Reg_Polygon</code></a>: <a href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a></li>
+ <li><a href="Plane-Figures.html#index-Reg_005fPolygon-62"><code>Reg_Polygon</code></a>: <a href="Plane-Figures.html#Plane-Figures">Plane Figures</a></li>
+ <li><a href="Solid-Data-Members.html#index-reg_005fpolygons-781"><code>reg_polygons</code></a>: <a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="Shape-Reference.html#index-Shape-232"><code>Shape</code></a>: <a href="Shape-Reference.html#Shape-Reference">Shape Reference</a></li>
+ <li><a href="Picture-Data-Members.html#index-shapes-303"><code>shapes</code></a>: <a href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="Regular-Polygon-Data-Members.html#index-short-656"><code>short</code></a>: <a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="Solid-Reference.html#index-Solid-774"><code>Solid</code></a>: <a href="Solid-Reference.html#Solid-Reference">Solid Reference</a></li>
+ <li><a href="Faced-Solid-Reference.html#index-Solid_005fFaced-836"><code>Solid_Faced</code></a>: <a href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a></li>
+ <li><a href="Tetrahedron.html#index-Tetrahedron-856"><code>Tetrahedron</code></a>: <a href="Tetrahedron.html#Tetrahedron">Tetrahedron</a></li>
+ <li><a href="Tetrahedron-Getstart.html#index-Tetrahedron-65"><code>Tetrahedron</code></a>: <a href="Tetrahedron-Getstart.html#Tetrahedron-Getstart">Tetrahedron Getstart</a></li>
+ <li><a href="I_002fO-Global-Variables.html#index-tex_005fstream-225"><code>tex_stream</code></a>: <a href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="Label-Data-Members.html#index-text-296"><code>text</code></a>: <a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-transform-480"><code>transform</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-transform-344"><code>transform</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Picture-Data-Members.html#index-transform-302"><code>transform</code></a>: <a href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="Transform-Reference.html#index-Transform-262"><code>Transform</code></a>: <a href="Transform-Reference.html#Transform-Reference">Transform Reference</a></li>
+ <li><a href="Transforms.html#index-Transform-35"><code>Transform</code></a>: <a href="Transforms.html#Transforms">Transforms</a></li>
+ <li><a href="Icosahedron-Data-Members.html#index-triangle_005fradius-873"><code>triangle_radius</code></a>: <a href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">Icosahedron Data Members</a></li>
+ <li><a href="Tetrahedron-Data-Members.html#index-triangle_005fradius-858"><code>triangle_radius</code></a>: <a href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">Tetrahedron Data Members</a></li>
+ <li><a href="Truncated-Octahedron.html#index-Trunc_005fOctahedron-878"><code>Trunc_Octahedron</code></a>: <a href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a></li>
+ <li><a href="Truncated-Octahedron.html#index-Truncated-Octahedron-879"><code>Truncated Octahedron</code></a>: <a href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a></li>
+ <li><a href="Shape-Data-Members.html#index-UNDRAW-238"><code>UNDRAW</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-UNDRAWDOT-237"><code>UNDRAWDOT</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-UNFILL-239"><code>UNFILL</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Shape-Data-Members.html#index-UNFILLDRAW-240"><code>UNFILLDRAW</code></a>: <a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="Focus-Data-Members.html#index-up-476"><code>up</code></a>: <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="Color-Data-Members.html#index-use_005fname-164"><code>use_name</code></a>: <a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-user_005fcoordinates-342"><code>user_coordinates</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-user_005fcoordinates-_0028Point_0029-27"><code>user_coordinates (Point)</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Transform-Global-Variables-and-Constants.html#index-user_005ftransform-264"><code>user_transform</code></a>: <a href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="Polyhedron-Data-Members.html#index-vertex_005fradius-855"><code>vertex_radius</code></a>: <a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="Solid_005fFaced-Data-Members.html#index-vertices-838"><code>vertices</code></a>: <a href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-view_005fcoordinates-343"><code>view_coordinates</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-view_005fcoordinates-_0028Point_0029-28"><code>view_coordinates (Point)</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Namespace-Colors.html#index-violet-208"><code>violet</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-violet_005fred-204"><code>violet_red</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-white-213"><code>white</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Cuboid-Data-Members.html#index-width-842"><code>width</code></a>: <a href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="Point-Data-Members.html#index-world_005fcoordinates-340"><code>world_coordinates</code></a>: <a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="Declaring-and-Initializing-Points.html#index-world_005fcoordinates-_0028Point_0029-26"><code>world_coordinates (Point)</code></a>: <a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="Namespace-Colors.html#index-yellow-201"><code>yellow</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="Namespace-Colors.html#index-yellow_005fgreen-211"><code>yellow_green</code></a>: <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a></li>
+    </ul><!-- funcidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,181 ----
+ <html lang="en">
+ <head>
+ <title>Declaring and Initializing Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Paths.html#Paths" title="Paths">
+ <link rel="prev" href="Paths.html#Paths" title="Paths">
+ <link rel="next" href="Drawing-and-Filling-Paths-Intro.html#Drawing-and-Filling-Paths-Intro" title="Drawing and Filling Paths Intro">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
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+ <meta http-equiv="Content-Style-Type" content="text/css">
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+ <body>
+ <div class="node">
+ <a name="Declaring-and-Initializing-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Drawing-and-Filling-Paths-Intro.html#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Paths.html#Paths">Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Paths.html#Paths">Paths</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">6.1 Declaring and Initializing Paths</h3>
+ 
+ <p>There are various ways of declaring and initializing <code>Paths</code>.  The
+ simplest is to use the constructor taking two <code>Point</code> arguments:
+ 
+ <pre class="example">     Point A;
+      Point B(2, 2);
+      Path p(A, B);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF9.png"
+ alt="[Figure 9. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 9. 
+ <br>
+ </p>
+ 
+    <p><code>Paths</code> created in this way are important, because they are
+ guaranteed to be linear, as long as no operations are performed on them
+ that cause them to become non-linear. 
+ Linear <code>Paths</code> can be used to find <dfn>intersections</dfn>. 
+ See <a href="Path-Intersections.html#Path-Intersections">Path Intersections</a>.
+ 
+    <p><code>Paths</code> can be declared and initialized using a single connector
+ and an arbitrary number of <code>Points</code>.  The first argument is a
+ <code>string</code> specifying the connector.  It is followed by a
+ <code>bool</code>, indicating whether the
+ <code>Path</code> is cyclical or not. Then, an arbitrary number of
+ pointers to <code>Point</code> follow.  The last argument must be 0.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+ <pre class="example">     Point p[3];
+      p[0].shift(1);
+      p[1].set(1, 2, 2);
+      p[2].set(1, 0, 2);
+      Path pa("--", true, &amp;p[0], &amp;p[1], &amp;p[2], 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF10.png"
+ alt="[Figure 10. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 10. 
+ <br>
+ </p>
+ 
+    <p>Another constructor must be used for <code>Paths</code> with
+ more than one connector and an arbitrary number of <code>Points</code>. 
+ The argument list starts with a pointer to <code>Point</code>, followed by
+ <code>string</code> for the first connector.  Then,
+ pointer to <code>Point</code> arguments alternate with <code>string</code> arguments
+ for the connectors. 
+ Again, the list of arguments ends in 0.  There is no
+ need for a <code>bool</code> to indicate whether the <code>Path</code> is cyclical
+ or not;  if it is, the last non-zero argument will be a connector,
+ otherwise, it will be a pointer to <code>Point</code>.
+ 
+ <pre class="example">     Point p[8];
+      p[0].set(-2);
+      p[1].set(2);
+      p[2].set(0, 0, -2);
+      p[3].set(0, 0, 2);
+      p[4] = p[0].mediate(p[2]);
+      p[5] = p[2].mediate(p[1]);
+      p[6] = p[1].mediate(p[3]);
+      p[7] = p[3].mediate(p[0]);
+      p[4] *= p[5] *= p[6] *= p[7].shift(0, 1);
+      Path pa(&amp;p[0], "..", &amp;p[4], "...", &amp;p[2],
+              "..", &amp;p[5], "...", &amp;p[1], "..", &amp;p[6],
+              "...", &amp;p[3], "..", &amp;p[7], "...", 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF11.png"
+ alt="[Figure 11. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 11. 
+ <br>
+ </p>
+ 
+    <p>As mentioned above (see <a href="Accuracy.html#Accuracy">Accuracy</a>), specifying connectors is
+ problematic for three-dimensional <code>Paths</code>,
+ because MetaPost ultimately calculates the &ldquo;most pleasing curve&rdquo;
+ based on the two-dimensional points in the MetaPost code written by
+ 3DLDF.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ For this reason, it's advisable to avoid specifying &lsquo;<samp><span class="samp">curl</span></samp>&rsquo;,
+ &lsquo;<samp><span class="samp">dir</span></samp>&rsquo;, &lsquo;<samp><span class="samp">tension</span></samp>&rsquo; or control points in connectors. 
+ The more <code>Points</code> a (3DLDF) <code>Path</code> or other object contains,
+ the less freedom MetaPost has to determine the (MetaPost) <code>path</code>
+ through them. 
+ So a three-dimensional <code>Path</code> or
+ other object in 3DLDF should have enough <code>Points</code> to ensure
+ satisfactory results.  The <code>Path</code> in [the previous figure]
+  does not
+ really have enough <code>Points</code>.  It may require some trial and error
+ to determine
+ what a sufficient number of <code>Points</code> is in a given case.
+ 
+    <p><code>Paths</code> are very flexible, but not always convenient.  3DLDF
+ provides a number of classes representing common geometric
+ <code>Shapes</code>, which will be described in subsequent sections, and I
+ intend to add more in the course of time.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> It's easy to forget to use <code>Point*</code> arguments, rather
+ than plain <code>Point</code> arguments, and to forget to end the list of
+ arguments with 0.  If plain <code>Point</code> arguments are used, compilation
+ fails with GCC.  With the DEC compiler, compilation succeeds, but a
+ memory fault error occurs at run-time.  If the argument list doesn't end
+ in 0, neither compiler signals an error, but a memory fault error always
+ occurs at run-time.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 14, p. 127.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Declaring-and-Initializing-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,159 ----
+ <html lang="en">
+ <head>
+ <title>Declaring and Initializing Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Points.html#Points" title="Points">
+ <link rel="prev" href="Points.html#Points" title="Points">
+ <link rel="next" href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points" title="Setting and Assigning to Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Declaring-and-Initializing-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Points.html#Points">Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Points.html#Points">Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">2.1 Declaring and Initializing Points</h3>
+ 
+ <p><a name="index-Point-16"></a>The most basic drawable object in 3DLDF is <code>class Point</code>.  It is
+ analogous to <code>pair</code> in Metafont.  For example, in Metafont one
+ can define a <code>pair</code> using the &ldquo;z&rdquo; syntax as
+ follows:
+ 
+ <pre class="example">     z0 = (1cm, 1cm);
+ </pre>
+    <p class="noindent">There are other ways of defining <code>pairs</code> in Metafont (and
+ MetaPost), but this is the usual way.
+ 
+    <p>In 3DLDF, a Point is declared and initialized as follows:
+ 
+ <pre class="example">     Point pt0(1, 2, 3);
+ </pre>
+    <p>This simple example demonstrates several differences between Metafont
+ and 3DLDF.  First of all, there is no analog in 3DLDF to Metafont's
+ &ldquo;z&rdquo; syntax. 
+ If I want to have <code>Points</code> called &ldquo;<code>pt0</code>&rdquo;, &ldquo;<code>pt1</code>&rdquo;,
+ &ldquo;<code>pt2</code>&rdquo;, etc., then I must declare each of them to be a
+ <code>Point</code>:
+ 
+ <pre class="example">     Point pt0(10, 15, 2);
+      Point pt1(13, 41, 5.5);
+      Point pt2(62.9, 7.02, 8);
+ </pre>
+    <p>Alternatively, I could declare an array of <code>Points</code>:
+ 
+ <pre class="example">     Point pt[3];
+ </pre>
+    <p class="noindent">Now I can refer to <code>pt[0]</code>, <code>pt[1]</code>, and <code>pt[2]</code>.
+ 
+ <p class="noindent"><a name="index-Point_003a_003ameasurement_005funits-17"></a><a name="index-measurement_005funits-_0028Point_0029-18"></a><a name="index-measurement-units-19"></a><a name="index-units-of-measurement-20"></a><a name="index-input-routine-21"></a>In the Metafont example, the x and y-coordinates of the <code>pair z0</code>
+ are specified using the unit of measurement, in this case, centimeters. 
+ This is currently not possible in 3DLDF.  The current unit of
+ measurement is stored in the static variable <code>Point::measurement_units</code>,
+ which is a <code>string</code>.  Its default value is <code>"cm"</code> for
+ &ldquo;centimeters&rdquo;. 
+ At present, it is best to stick with one unit of measurement for a
+ drawing. 
+ After I've defined an input routine, 3DLDF should handle
+ units of measurement in the same way that Metafont does.
+ 
+    <p><a name="index-Point_003a_003aworld_005fcoordinates-22"></a><a name="index-Point_003a_003auser_005fcoordinates-23"></a><a name="index-Point_003a_003aview_005fcoordinates-24"></a><a name="index-Point_003a_003aprojective_005fcoordinates-25"></a><a name="index-world_005fcoordinates-_0028Point_0029-26"></a><a name="index-user_005fcoordinates-_0028Point_0029-27"></a><a name="index-view_005fcoordinates-_0028Point_0029-28"></a><a name="index-projective_005fcoordinates-_0028Point_0029-29"></a>Another difference is that the <code>Points</code> <code>pt0</code>, <code>pt1</code>, and
+ <code>pt2</code> have three coordinates, x, y, and z, whereas <code>z0</code> has
+ only two, x and y.  Actually, the difference goes deeper than this.  In
+ Metafont, a <code>pair</code> has two parts, <code>xpart</code> and <code>ypart</code>,
+ which can be examined by the user.  In 3DLDF, a <code>Point</code> contains
+ the following sets of coordinates:
+ 
+ <pre class="example">     world_coordinates
+      user_coordinates
+      view_coordinates
+      projective_coordinates
+ </pre>
+    <p class="noindent">These are sets of 3-dimensional <dfn>homogeneous</dfn> coordinates, which
+ means that they contain four coordinates: x, y, z, and w.  Homogeneous
+ coordinates are used in the affine and perspective transformations
+ (see <a href="Transforms.html#Transforms">Transforms</a>).
+ 
+    <p>Currently, only <code>world_coordinates</code> and
+ <code>projective_coordinates</code> are used in 3DLDF. 
+ The <code>world_coordinates</code> refer to the position of a <code>Point</code> in
+ 3DLDF's basic, unchanging coordinate system. 
+ The <code>projective_coordinates</code> are the coordinates of the
+ two-dimensional projection of the <code>Point</code> onto a plane. 
+ This projection is what is ultimately printed out or displayed on the
+ computer screen.  Please note, that when the coordinates of a
+ <code>Point</code> are referred to in this manual, the
+ <code>world_coordinates</code> are meant, unless otherwise stated.
+ 
+    <p><code>Points</code> can be declared and their values can be set in different
+ ways.
+ 
+ <pre class="example">     Point pt0;
+      Point pt1(1);
+      Point pt2(2.3, 52);
+      Point pt3(4.5, 7, 13.205);
+ </pre>
+    <p><code>pt0</code> is declared without any arguments, i.e., using the default
+ constructor, so the values of its x, y, and
+ z-coordinates are all 0.
+ 
+    <p><code>pt1</code> is declared and initialized with one argument for the x-coordinate,
+ so its y and z-coordinates are initialized with the values of
+ <code>CURR_Y</code> and <code>CURR_Z</code> respectively. 
+ The latter are static constant data members
+ of class <code>Point</code>, whose values are 0 by default.  They can be reset
+ by the user, who should
+ make sure that they have sensible values.
+ 
+    <p><code>pt2</code> is declared and initialized with two arguments for its x and
+ y-coordinates, so its z-coordinate is initialized to the value of
+ <code>CURR_Z</code>.  Finally, <code>pt3</code> has an argument for each of its
+ coordinates.
+ 
+    <p>Please note that <code>pt0</code> is constructed using a the default
+ constructor, whereas the other <code>Points</code> are constructed using a
+ constructor with one required argument (for the x-coordinate), and two
+ optional arguments (for the y and z-coordinates).  The default
+ constructor always sets all the coordinates to 0, irrespective of the
+ values of <code>CURR_Y</code> and <code>CURR_Z</code>.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Defining-and-Initializing-Colors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Defining-and-Initializing-Colors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Defining-and-Initializing-Colors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Defining-and-Initializing-Colors.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Defining and Initializing Colors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Querying-Colors.html#Querying-Colors" title="Querying Colors">
+ <link rel="next" href="Namespace-Colors.html#Namespace-Colors" title="Namespace Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Defining-and-Initializing-Colors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Colors.html#Querying-Colors">Querying Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.7 Defining and Initializing Colors</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>define_color_mp</b> ()<var><a name="index-define_005fcolor_005fmp-195"></a></var><br>
+ <blockquote><p>Writes MetaPost code to <code>out_stream</code>, in order to define objects of
+ type  <code>color</code> within MetaPost, and set their <code>redparts</code>,
+ <code>greenparts</code>, and <code>blueparts</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>initialize_colors</b> (<var>void</var>)<var><a name="index-initialize_005fcolors-196"></a></var><br>
+ <blockquote><p>Calls <code>define_color_mp()</code> (described above) for the
+ <code>Colors</code> that are defined in <code>namespace Colors</code>
+ (see <a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a>). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,102 ----
+ <html lang="en">
+ <head>
+ <title>Dodecahedron Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link rel="prev" href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members" title="Dodecahedron Data Members">
+ <link rel="next" href="Dodecahedron-Net.html#Dodecahedron-Net" title="Dodecahedron Net">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dodecahedron-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Dodecahedron-Net.html#Dodecahedron-Net">Dodecahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">Dodecahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Dodecahedron</b> (<code>void</code>)<var><a name="index-Dodecahedron-867"></a></var><br>
+ <blockquote><p>Creates an empty <code>Dodecahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Dodecahedron</b> (<var>const Point&amp; p, const real pentagon_diameter, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Dodecahedron-868"></a></var><br>
+ <blockquote><p>Creates a <code>Dodecahedron</code> with its center at the origin, where the
+ pentagonal faces have enclosing circles of diameter
+ <var>pentagon_diameter</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Dodecahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Dodecahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+      <pre class="example">          Point P(-1, -2, 4);
+           Dodecahedron d(P, 3, 12.5, 16, 2);
+           d.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF191.png"
+ alt="[Figure 191. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 191. 
+ <br>
+ </p>
+ 
+      <pre class="example">          d.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF192.png"
+ alt="[Figure 192. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 192. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Data-Members.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Dodecahedron Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link rel="prev" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link rel="next" href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions" title="Dodecahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dodecahedron-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-865"></a></var><br>
+ <blockquote><p>The angle between the faces of the <code>Dodecahedron</code>,
+ namely
+ 116 degrees
+  34'
+  = \pi - \arctan(2). 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>pentagon_radius</b><var><a name="index-pentagon_005fradius-866"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a pentagonal face of the
+ <code>Dodecahedron</code>. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Getstart.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Getstart.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Dodecahedron Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Getstart.html#Polyhedron-Getstart" title="Polyhedron Getstart">
+ <link rel="prev" href="Tetrahedron-Getstart.html#Tetrahedron-Getstart" title="Tetrahedron Getstart">
+ <link rel="next" href="Icosahedron-Getstart.html#Icosahedron-Getstart" title="Icosahedron Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dodecahedron-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Icosahedron-Getstart.html#Icosahedron-Getstart">Icosahedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Tetrahedron-Getstart.html#Tetrahedron-Getstart">Tetrahedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">8.2.2 Dodecahedron</h4>
+ 
+ <p><a name="index-Dodecahedron-66"></a>A dodecahedron has 12 similar regular pentagonal faces. 
+ The following examples show the same <code>Dodecahedron</code> using different
+ projections:
+ 
+ <pre class="example">     default_focus.set(2, 5, -10, 2, 5, 10, 10);
+      Dodecahedron d(origin, 3);
+      d.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF40.png"
+ alt="[Figure 40. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 40. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF41.png"
+ alt="[Figure 41. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 41. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p>Please note that the <code>Dodecahedron</code> in [next figure]
+  is drawn, and not
+ filldrawn!
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF42.png"
+ alt="[Figure 42. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 42. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF43.png"
+ alt="[Figure 43. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 43. 
+ <br>
+ </p>
+ 
+ <!-- ********************************** -->
+    <p>In [next figure]
+ , <code>d</code> is filldrawn.  In this case,
+ the surface hiding algorithm has worked properly. 
+ See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF44.png"
+ alt="[Figure 44. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 44. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Net.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Net.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron-Net.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,115 ----
+ <html lang="en">
+ <head>
+ <title>Dodecahedron Net - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link rel="prev" href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions" title="Dodecahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dodecahedron-Net"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real pentagon_diameter, </var>[<var>bool do_half = false</var>])<var><a name="index-get_005fnet-869"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn>, i.e., the two-dimensional pattern of pentagons
+ that can be folded into a model of a dodecahedron.  The net lies
+ in the x-z plane.  The pentagons have enclosing circles of diameter
+ <var>pentagon_diameter</var>.  The center of the center pentagon of the first
+ half of the net is at the origin.  If the argument
+ <var>do_half</var> is <code>true</code>, only the first half of the
+ net is created.  This is used in the non-default constructor. 
+ See <a href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Dodecahedron; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Dodecahedron::get_net(1);
+           for(vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+               iter != vrp.end(); ++iter)
+                  (**iter).draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF193.png"
+ alt="[Figure 193. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 193. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real pentagon_diameter, </var>[<var>bool portrait = </var><code>true</code><var>, </var>[<var>bool make_tabs = </var><code>true</code>]])<var><a name="index-draw_005fnet-870"></a></var><br>
+ <blockquote><p>Draws the net for a <code>Dodecahedron</code> in the x-z plane.  The pentagons
+ have enclosing circles of diameter <var>pentagon_diameter</var>.  The
+ origin is used as the center of the middle pentagon of the first half of
+ the net.  The centers of the pentagons are numbered.
+ 
+         <p>If the argument <var>portrait</var> is <code>true</code> (the default), the net
+ is arranged for printing in portrait format.  If it's <code>false</code>,
+ it's arranged for printing in landscape format.
+ 
+         <p>The argument <var>make_tabs</var> currently has no effect. 
+ When I get around to programming this, it will be used for specifying
+ whether tabs for gluing and/or sewing a cardboard model should be drawn,
+ too.
+ 
+      <pre class="example">          Dodecahedron::draw_net(1, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF194.png"
+ alt="[Figure 194. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 194. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dodecahedron.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dodecahedron.html
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+ <html lang="en">
+ <head>
+ <title>Dodecahedron - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link rel="prev" href="Tetrahedron.html#Tetrahedron" title="Tetrahedron">
+ <link rel="next" href="Icosahedron.html#Icosahedron" title="Icosahedron">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dodecahedron"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Icosahedron.html#Icosahedron">Icosahedron</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">37.2.2 Dodecahedron</h4>
+ 
+ <p><a name="index-Dodecahedron-864"></a>Class <code>Dodecahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p>Dodecahedra have 12 regular pentagonal faces.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">Dodecahedron Data Members</a>
+ <li><a accesskey="2" href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Dodecahedron-Net.html#Dodecahedron-Net">Dodecahedron Net</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-Points-Intro.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Drawing-Points-Intro.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Drawing Points Intro - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points" title="Drawing and Labeling Points">
+ <link rel="prev" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points" title="Drawing and Labeling Points">
+ <link rel="next" href="Labeling-Points-Intro.html#Labeling-Points-Intro" title="Labeling Points Intro">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Drawing-Points-Intro"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Labeling-Points-Intro.html#Labeling-Points-Intro">Labeling Points Intro</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">5.1 Drawing Points</h3>
+ 
+ <p><a name="index-drawing-and-filling-44"></a>It's all very well to declare <code>Points</code>, place them at particular
+ locations, print their locations to standard output, and transform them,
+ but none of these operations produce any MetaPost output. 
+ In order to do this, the first step is to use <dfn>drawing and
+ filling commands</dfn>.  The drawing and filling commands in 3DLDF are
+ modelled on those in Metafont.
+ 
+    <p><a name="index-pens-45"></a>The following example demonstrates how to draw a dot specifying a
+ <code>Color</code> (see <a href="Color-Reference.html#Color-Reference">Color Reference</a>) and a
+ <dfn>pen</dfn><a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>.
+ 
+ <pre class="example">     Point P(0, 1);
+      P.drawdot(Colors::black, "pencircle scaled 3mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF3.png"
+ alt="[Figure 3. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 3. 
+ <br>
+ </p>
+ 
+    <p>In <code>drawdot()</code>, a <code>Color</code> argument precedes the
+ <code>string</code> argument for the pen, so &ldquo;<code>Colors::black</code>&rdquo; must be
+ specified as a placeholder in the call to
+ <code>drawdot()</code>.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+    <p>The following example &ldquo;undraws&rdquo; a dot at the same location using a
+ smaller pen. <code>undraw()</code> does not take a <code>Color</code> argument.
+ 
+ <pre class="example">     p.undrawdot("pencircle scaled 2mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF4.png"
+ alt="[Figure 4. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 4. 
+ <br>
+ </p>
+ 
+ <p class="noindent">For complete descriptions of <code>drawdot()</code> and <code>undrawdot()</code>,
+ see <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Reference; Drawing</a>.
+ 
+    <p><a name="index-drawing-and-filling-46"></a><a name="index-lines_002c-drawing-47"></a><a name="index-connecting-_0040code_007bPoints_007d-48"></a><a name="index-g_t_0040code_007bPoints_007d_002c-connecting-49"></a>Drawing and undrawing dots is not very exciting.  In order to make a
+ proper drawing it is necessary to <em>connect</em> the <code>Points</code>.  The most
+ basic way of doing this is to use the <code>Point</code> member function
+ <code>draw()</code> with a <code>Point</code> argument:
+ 
+ <pre class="example">     Point p0;
+      Point p1(2, 2);
+      p0.draw(p1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF5.png"
+ alt="[Figure 5. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 5. 
+ <br>
+ </p>
+ 
+ <p class="noindent"><code>p0.draw(p1)</code> is equivalent in its effect to
+ <code>p1.draw(p0)</code>.
+ 
+    <p>The function <code>Point::draw()</code> takes a required <code>Point&amp;</code>
+ argument (a <dfn>reference</dfn><a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>
+ to a <code>Point</code>) an optional <code>Color</code>
+ argument, and optional <code>string</code> arguments for
+ the dash pattern and the
+ pen.  The <code>string</code> arguments, if present, are passed unchanged to
+ the output file. 
+ The empty <code>string</code> following the
+ argument <code>p1</code> is a placeholder for the dash pattern argument, which
+ isn't used here.
+ 
+ <pre class="example">     p0.draw(p1, Colors::gray, "", "pensquare scaled .5cm rotated 45");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF6.png"
+ alt="[Figure 6. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 6. 
+ <br>
+ </p>
+ 
+    <p>The function <code>Point::undraw()</code> takes a required <code>Point&amp;</code>
+ argument and
+ optional <code>string</code> arguments for the dash pattern and the
+ pen.  Unlike <code>Point::draw()</code>, a <code>Color</code> argument would have no
+ meaning for <code>Point::undraw()</code>. 
+ The <code>string</code> arguments are passed unchanged to the output file.
+ 
+    <p><code>undraw()</code> can be used to &ldquo;hollow out&rdquo; the region
+ drawn in [the previous figure]
+ .  Since a dash pattern is used, portions
+ of the middle of the region are not undrawn.
+ 
+ <pre class="example">     p0.undraw(p1, "evenly scaled 6", "pencircle scaled .2cm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF7.png"
+ alt="[Figure 7. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 7. 
+ <br>
+ </p>
+ 
+    <p>For complete descriptions of <code>draw()</code> and <code>undraw()</code>,
+ see <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Reference; Drawing</a>.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Pens are a concept from Metafont.  In 3DLDF,
+ there is currently no type &ldquo;<code>Pen</code>&rdquo;.  Pen arguments to functions
+ are simply <code>strings</code>, and are written unaltered to <code>out_stream</code>. 
+ For more information about
+ Metafont's <code>pens</code>, see
+ Knuth, <cite>The Metafontbook</cite>, Chapter 4.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> <code>Colors</code> are declared in the
+ namespace <code>Colors</code>, so if you have
+ a &ldquo;<code>using</code>&rdquo; declaration in the function where you use
+ <code>drawdot()</code>, you can write &ldquo;<code>black</code>&rdquo; instead of
+ &ldquo;<code>Colors::black</code>&rdquo;.  For more information about namespaces, see
+ Stroustrup,  <cite>The C++
+  Programming Language</cite>, Chapter 8.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> &ldquo;A <dfn>reference</dfn> is an alternative name for an object.  The
+ main use of references is for specifying arguments and return values for
+ functions in general and for overloaded operators (Chapter 11) in
+ particular.&rdquo;  Stroustrup, <cite>The C++
+  Programming Language</cite>,
+ section
+ 5.5, p. 97.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Paths-Intro.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Paths-Intro.html
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+ <html lang="en">
+ <head>
+ <title>Drawing and Filling Paths Intro - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Paths.html#Paths" title="Paths">
+ <link rel="prev" href="Declaring-and-Initializing-Paths.html#Declaring-and-Initializing-Paths" title="Declaring and Initializing Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Drawing-and-Filling-Paths-Intro"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Declaring-and-Initializing-Paths.html#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Paths.html#Paths">Paths</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">6.2 Drawing and Filling Paths</h3>
+ 
+ <p>The easiest way to draw a <code>Path</code> is with no arguments.
+ 
+ <pre class="example">     Point pt[5];
+      pt[0].set(-1, -2);
+      pt[1].set(0, -3);
+      pt[2].set(1, 0);
+      pt[3].set(2, 1);
+      pt[4].set(-1, 2);
+      Path pa("..", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3], &amp;pt[4], 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF12.png"
+ alt="[Figure 12. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 12. 
+ <br>
+ </p>
+ 
+    <p>Since <code>pa</code> is closed, it can be filled as well as drawn.  The
+ following example uses <code>fill()</code> with a <code>Color</code> argument, in
+ order to avoid having a large splotch of black on the page. 
+ Common <code>Colors</code> are declared in the <code>namespace Colors</code>. 
+ See <a href="Color-Reference.html#Color-Reference">Color Reference</a>.
+ 
+ <pre class="example">     pa.fill(Colors::gray);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF13.png"
+ alt="[Figure 13. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 13. 
+ <br>
+ </p>
+ 
+    <p>Closed <code>Paths</code> can be filled and drawn, using the function
+ <code>filldraw()</code>.  This function draws the <code>Path</code> using the pen
+ specified, or MetaPost's <code>currentpen</code> by default.  A <code>Color</code>
+ for drawing the <code>Path</code> can also be specified, otherwise, the
+ default color (currently <code>Colors::black</code>) is used. 
+ In addition, the <code>Path</code> is filled using a second <code>Color</code>,
+ which can be specified, or the background_color
+ (<code>Colors::background_color</code>), by default. 
+ Filling a <code>Path</code> using the background color causes it to hide
+ objects that lie behind it. 
+ See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>, for a description of the surface hiding
+ algorithm, and examples.  Currently, this algorithm is quite primitive
+ and only works
+ for simple cases.
+ 
+ <pre class="example">     Point p0(-3, 0, 1);
+      Point p1(3, 1, 1);
+      p0.draw(p1);
+      pa.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF14.png"
+ alt="[Figure 14. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 14. 
+ <br>
+ </p>
+ 
+    <p>The following example uses arguments for the <code>Colors</code> used for
+ drawing and filling, and the pen.  The empty string argument before the
+ pen argument is a placeholder for the dash pattern argument.
+ 
+ <pre class="example">     pa.filldraw(black, gray, "",
+         "pensquare xscaled 3mm yscaled 1mm rotated 60");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF15.png"
+ alt="[Figure 15. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 15. 
+ <br>
+ </p>
+ 
+    <p><code>Paths</code> can also be &ldquo;undrawn&rdquo;, &ldquo;unfilled&rdquo;, and &ldquo;unfilldrawn&rdquo;,
+ using the corresponding functions:
+ 
+ <pre class="example">     pa.fill(gray);
+      p0.undraw(p1, "", "pencircle scaled 3mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF16.png"
+ alt="[Figure 16. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 16. 
+ <br>
+ </p>
+ 
+ <pre class="example">     pa.fill(gray);
+      Path q;
+      q = pa;
+      q.scale(.5, .5);
+      q.unfill();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF17.png"
+ alt="[Figure 17. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 17. 
+ <br>
+ </p>
+ 
+    <p>The function <code>unfilldraw()</code> takes a <code>Color</code> argument for
+ drawing the <code>Path</code>, which is <code>*Colors::background_color</code> by
+ default.  This makes it possible to unfill the <code>Path</code> while drawing
+ the outline with a visible <code>Color</code>.  On the other hand, it also
+ makes it necessary to specify <code>*Colors::background_color</code> or
+ <code>Colors::white</code>, if the user wants to use the dash pattern and/or
+ pen arguments, without drawing the <code>Path</code>.
+ 
+ <pre class="example">     pa.fill(gray);
+      q.unfilldraw(white, "", "pensquare xscaled 3mm yscaled 1mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF18.png"
+ alt="[Figure 18. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 18. 
+ <br>
+ </p>
+ 
+    <p>The following example demonstrates the use of <code>unfilldraw()</code> with
+ <code>black</code> as its <code>Color</code> argument.  Unfortunately, it also
+ demonstrates one of the limitations of the surface hiding algorith:  The
+ line from <code>p0</code> to <code>p1</code> is hidden by the
+ filled <code>Path pa</code>.  Since the portion of <code>pa</code> covered by
+ <code>Path q</code> has been unfilled,
+ the line from p_0 to p_1
+ should be visible as it passes through <code>q</code>.  However, from the
+ point of view of 3DLDF, there is no relationship between <code>pa</code> and
+ <code>q</code>;  nor does it &ldquo;know&rdquo; whether a <code>Path</code> has been filled or
+ unfilled.  If it's on a <code>Picture</code>, it will hide objects lying
+ behind it, unless the surface hiding algorithm fails for another
+ reason.  See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>, for more information.
+ 
+ <pre class="example">     p0.draw(p1);
+      pa.fill(gray);
+      q.unfilldraw(black, "", "pensquare xscaled 3mm yscaled 1mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF19.png"
+ alt="[Figure 19. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 19. 
+ <br>
+ </p>
+ 
+    <p>See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Paths; Drawing and Filling</a>, for more
+ information, and complete descriptions of the functions.
+ 
+ <!-- chapter Plane Figures -->
+ <!-- gsplane.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
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+ <title>Drawing and Filling Paths - 3DLDF User and Reference Manual</title>
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+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
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+ <div class="node">
+ <a name="Drawing-and-Filling-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.12 Drawing and Filling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>draw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw-585"></a></var><br>
+ &mdash; <code>const</code> Virtual function: void <b>draw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = *Colors::default_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw-586"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ the copy on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>DRAW</code>, and
+ the values of its
+ <code>draw_color</code>, <code>dashed</code>, and <code>pen</code> according to the
+ arguments.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>All of the arguments to <code>draw()</code> are optional, so it can be invoked
+ as follows:
+ 
+      <pre class="example">          Point A;
+           Point B(2);
+           Point C(3, 3);
+           Point D(1, 2);
+           Point E(-1, 1);
+           Path p("..", true, &amp;A, &amp;B, &amp;C, &amp;D, &amp;E, 0);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF120.png"
+ alt="[Figure 120. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 120. 
+ <br>
+ </p>
+ 
+         <p>The arguments:
+ 
+           <dl>
+ <dt><var>ddraw_color</var><dd>Used to specify a color for the
+ <code>Path</code>.  <var>ddraw_color</var> is a reference to a <code>Color</code>. 
+ Colors are described in <a href="Color-Reference.html#Color-Reference">Color Reference</a>.
+ 
+           <p>The most basic <code>Colors</code> are predefined in 3DLDF (in the
+ <code>namespace Colors</code>), and
+ users may create new <code>Colors</code> and specify their red-green-blue
+ values.
+ 
+           <p>The <code>Path p</code> could be drawn in red by calling
+ <code>p.draw(Colors::red)</code>. This manual isn't intended to be printed in
+ color, so there's no figure to demonstrate this.  However, gray values
+ can be printed on non-color printers.
+ 
+           <pre class="example">               using namespace Colors;
+                p.draw(gray, "", "pencircle scaled .25mm");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF121.png"
+ alt="[Figure 121. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 121. 
+ <br>
+ </p>
+ 
+           <br><dt><var>ddashed</var><dd>A <code>string</code> representing a &ldquo;dash pattern&rdquo;, as defined in
+ MetaPost<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>. 
+ Dash patterns have no meaning in 3DLDF, they are simply <code>strings</code>
+ that are written unchanged to <code>out_stream</code>.
+ 
+           <pre class="example">               p.draw(black, "evenly");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF122.png"
+ alt="[Figure 122. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 122. 
+ <br>
+ </p>
+ 
+           <br><dt><var>ppen</var><dd>A <code>string</code> representing a &ldquo;pen&rdquo;, as defined in Metafont and
+ MetaPost<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>. 
+ Pens have no meaning in 3DLDF, they are simply <code>strings</code>
+ that are written unchanged to <code>out_stream</code>.
+ 
+           <pre class="example">               p.draw(black, "", "pensquare xscaled 3mm
+                       yscaled .25mm scaled .5mm");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF123.png"
+ alt="[Figure 123. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 123. 
+ <br>
+ </p>
+ 
+           <br><dt><var>picture</var><dd>Indicates the <code>Picture</code> on which the <code>Path</code> should be
+ drawn.
+ 
+           <p>The two versions of <code>draw()</code> differ in the position of the
+ <var>picture</var> argument:  In the first version, it's the last argument,
+ while in the second version, it's the first argument.  If a
+ <var>picture</var> argument is used, it's often more convenient to use the second
+ version.
+ 
+           <p>The following example puts <code>Path p</code> onto <code>temp_picture</code>.  It
+ also demonstrates how the labels are put onto <code>temp_picture</code>, and
+ how <code>temp_picture</code> is output.  In
+ the previous examples, the commands for making the labels and outputting
+ <code>current_picture</code> were left out in order to reduce clutter. 
+ See <a href="Labelling-Points.html#Labelling-Points">Point Reference; Labelling</a>, and
+ <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Reference; Outputting; Output Functions</a>.
+ 
+           <pre class="example">               Picture temp_picture;
+                p.draw(temp_picture);
+                A.dotlabel("A", "bot", temp_picture);
+                B.dotlabel("B", "bot", temp_picture);
+                C.dotlabel("C", "top", temp_picture);
+                D.dotlabel("D", "top", temp_picture);
+                E.dotlabel("E", "lft", temp_picture);
+                temp_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF124.png"
+ alt="[Figure 124. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 124. 
+ <br>
+ </p>
+ 
+         </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>draw_help</b> ([<var>const Color&amp; ddraw_color = *help_color, </var>[<var>string ddashed = help_dash_pattern, </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fhelp-587"></a></var><br>
+ &mdash; <code>const</code> function: void <b>draw_help</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*help_color</code><var>, </var>[<var>string ddashed = </var><code>help_dash_pattern</code><var>, </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw_005fhelp-588"></a></var><br>
+ <blockquote><p>This functions are for drawing help lines. 
+ They are like <code>draw()</code>, except that <code>draw_help()</code> returns immediately,
+ if <code>do_help_lines</code> (a static data member in
+ <code>Path</code>) is <code>false</code>. 
+ Also, the defaults for <var>ddraw_color</var> and
+ <var>ddashed</var> differ from those for <code>draw()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>drawarrow</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-drawarrow-589"></a></var><br>
+ &mdash; <code>const</code> virtual function: void <b>drawarrow</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-drawarrow-590"></a></var><br>
+ <blockquote><p>Like <code>draw()</code>, except that the MetaPost command <code>drawarrow</code> is
+ written to <code>out_stream</code> when <code>picture</code>
+ is output. 
+ The second version is convenient for passing a <code>Picture</code> argument
+ without having to specify all of the other arguments.
+ 
+      <!-- !! TO DO:  Do something about adding arguments for the size and shape -->
+      <!-- of the arrowhead.  LDF 2003.07.13. -->
+      <pre class="example">          Point m;
+           Point n(2, 2);
+           m.dotlabel("$m$", "bot");
+           n.dotlabel("$n$");
+           m.drawarrow(n);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF125.png"
+ alt="[Figure 125. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 125. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member function: void <b>draw_axes</b> ([<var>real dist = 2.5, </var>[<var>string pos_x = "bot", </var>[<var>string pos_y = "lft", </var>[<var>string pos_z = "bot", </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>const Point&amp; shift_x = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_y = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_z = </var><code>origin</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]]]]]]]])<var><a name="index-draw_005faxes-591"></a></var><br>
+ &mdash; Non-member function: void <b>draw_axes</b> (<var>const Color&amp; ddraw_color, </var>[<var>real dist = 2.5, </var>[<var>string pos_x = "bot", </var>[<var>string pos_y = "lft", </var>[<var>string pos_z = "bot", </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>const Point&amp; shift_x = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_y = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_z = </var><code>origin</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]]]]]]])<var><a name="index-draw_005faxes-592"></a></var><br>
+ <blockquote><p>These functions draw lines centered on the origin, and ending in arrows in the
+ directions of the positive x,
+ y, and z-axes, and labels them with the appropriate letters. 
+ <code>draw_axes()</code> is used in
+ many of the figures in this handbook.  It can be helpful in determining
+ whether a <code>Focus</code> has a good &ldquo;<code>up</code>&rdquo; direction. 
+ See <a href="Focus-Data-Members.html#Focus-Data-Members">Focus Reference; Data Members</a>.
+ 
+         <p>In the first version, all of the arguments are optional.  In the second
+ version, <var>ddraw_color</var> is required and has been moved to the front
+ of the argument list.  This version is often convenient, when a
+ <code>Color</code> other than the default is desired.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><var>dist</var><dd>The length of the lines drawn.  The default is 2.5.  The value 0 can be
+ used as a dummy argument, if the default for <var>dist</var> is desired, but
+ other arguments must be specified.
+ 
+           <br><dt><dt><var>pos_x</var><dt><var>pos_y</var><dt><var>pos_z</var><dd>The position arguments for the labelling commands for each of the axes. 
+ The defaults are <code>"bot"</code> for the x and z-axes, and <code>"lft"</code> for
+ the y-axis. 
+ The usual <code>strings</code> for the
+ position of labels can be used,
+ namely: <code>"top"</code>, <code>"bot"</code>, <code>"lft"</code>,
+ <code>"rt"</code>, <code>"ulft"</code>, <code>"urt"</code>, <code>"llft"</code>,
+ <code>"lrt"</code>, and <code>""</code>.  If <code>""</code> is used, that axis is not
+ drawn.  This can be useful for parallel projections onto one of the
+ major planes<a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>. 
+ In addition, <code>"d"</code> can be used to indicate that the default should
+ be used for that label.  This can be useful if one needs a placeholder,
+ but doesn't remember what the default is for that label.
+ 
+           <pre class="example">               draw_axes(0, "bot", "rt", "");
+                current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF126.png"
+ alt="[Figure 126. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 126. 
+ <br>
+ </p>
+ 
+           <p>In addition, the arguments <var>shift_x</var>, <var>shift_y</var>,
+ and <var>shift_z</var> can be used to adjust the positions of the labels
+ further (see below).
+ 
+           <br><dt><var>ddraw_color</var><dt><var>ddashed</var><dt><var>ppen</var><dd>Arguments for the <code>drawarrow()</code> command, described above, in this
+ section.
+ 
+           <br><dt><var>shift_x</var><dt><var>shift_y</var><dt><var>shift_z</var><dd>Offsets for the labels.  These arguments make it possible to adjust the
+ positions of the labels.  The defaults are <code>origin</code>, so no shifting
+ takes place, if they are used.  In [next figure]
+ ,
+ <code>draw_axes</code> is called without any arguments, so the defaults
+ are used.
+ 
+           <pre class="example">               draw_axes();
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF127.png"
+ alt="[Figure 127. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 127. 
+ <br>
+ </p>
+ 
+           <p>In [next figure]
+ , the <code>Point P</code> is used to shift the labels. 
+ Please note that placeholders must be used for the first arguments.
+ 
+           <pre class="example">               Point P(.5, .5, .5);
+                draw_axes(0, "d", "d", "d", black, "", "", P, -P, P);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF128.png"
+ alt="[Figure 128. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 128. 
+ <br>
+ </p>
+ 
+           <p>Please note that the <code>Points</code> used for placing the labels are
+ three-dimensional <code>Points</code>, whether the <var>shift_x</var>,
+ <var>shift_y</var>, and/or <var>shift_z</var> arguments are used or not. 
+ It is not currently possible to adjust the positions of the
+ labels on the two-dimensional projection itself.  This would
+ probably be more useful, but would require changing the way
+ <code>Picture::output()</code> functions.
+ 
+           <br><dt><var>picture</var><dd>The <code>Picture</code>, onto which the <code>Paths</code> and <code>Labels</code> are put. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>fill</b> ([<var>const Color&amp; ffill_color = </var><code>*Colors::default_color</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-fill-593"></a></var><br>
+ &mdash; Function: void <b>fill</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::default_color</code>])<var><a name="index-fill-594"></a></var><br>
+ <blockquote>
+         <p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it onto <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>FILL</code>, and
+ its <code>fill_color</code> to <code>*</code><var>ffill_color</var>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>The arguments are similar to those of <code>draw()</code>, except that the
+ <code>Color</code> argument is called <var>ffill_color</var> instead of
+ <var>ddraw_color</var>.
+ 
+      <pre class="example">          p.fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF129.png"
+ alt="[Figure 129. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 129. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>filldraw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-filldraw-595"></a></var><br>
+ &mdash; <code>const</code> function: void <b>filldraw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]]])<var><a name="index-filldraw-596"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ the copy onto <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>FILLDRAW</code>,
+ its <code>draw_color</code> and <code>fill_color</code> to
+ <code>*</code><var>ddraw_color</var> and <code>*</code><var>ffill_color</var>, respectively,
+ its <code>dashed</code> to <var>ddashed</var>, and its <code>pen</code>
+ to <var>ppen</var>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>The arguments are similar to those of <code>draw()</code> and <code>fill()</code>,
+ except that both <var>ddraw_color</var> and <var>ffill_color</var> are used.
+ 
+         <p>3DLDF's <code>filldraw()</code> differs from Metafont's and MetaPost's
+ <code>filldraw</code> commands:  In Metafont and MetaPost, <code>filldrawing</code>
+ is equivalent to filling a <code>path</code> and then drawing its
+ border using the <code>pen</code>. 
+ Metafont does not have colors.  While MetaPost does, its <code>filldraw</code>
+ command does not foresee the use of different colors for drawing and
+ filling.
+ 
+      <pre class="example">          p.filldraw(black, gray, "", "pencircle scaled 2mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF130.png"
+ alt="[Figure 130. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 130. 
+ <br>
+ </p>
+ 
+         <p>It can often be useful to draw the outline of a <code>Path</code>, but to have
+ it hide objects that lie behind it.  This is why the default for
+ <var>ffill_color</var> is <code>*Colors::background_color</code>.
+ 
+      <pre class="example">          default_focus.set(3, 0, -10, 3, 10, 10, 10);
+           Point p[8];
+           p[0] = p[1] = p[2] = p[3] = p[4]
+                = p[5] = p[6] = p[7].set(-1,-1, 5);
+           p[1] *= p[2] *= p[3] *= p[4] *= p[5]
+                *= p[6] *= p[7].rotate(0, 0, 45);
+           p[2] *= p[3] *= p[4]
+                *= p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[3] *= p[4] *= p[5] *= p[6]
+                *= p[7].rotate(0, 0, 45);
+           p[4] *= p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[6] *= p[7].rotate(0, 0, 45);
+           p[7].rotate(0, 0, 45);
+           Path r0("..", true, &amp;p[0], &amp;p[1], &amp;p[2],
+                   &amp;p[3], &amp;p[4], &amp;p[5], &amp;p[6], &amp;p[7], 0);
+           r0.filldraw(black, light_gray);
+           r0.scale(2, .5);
+           r0.shift(0, 0, -2.5);
+           r0.filldraw(black, gray);
+           r0.scale(.25, 3);
+           r0.shift(0, 0, -2.5);
+           r0.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF131.png"
+ alt="[Figure 131. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 131. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undraw</b> ([<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-597"></a></var><br>
+ &mdash; Function: void <b>undraw</b> (<var>Picture&amp; picture, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]])<var><a name="index-undraw-598"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>UNDRAW</code>, and
+ the values of its
+ <code>dashed</code> and <code>pen</code> according to the
+ arguments.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>This function &ldquo;undraws&rdquo; a <code>Path</code>.  This is equivalent to drawing
+ the <code>Path</code> using the background color
+ (<code>*Colors::background_color</code>).
+ 
+         <p>Undrawing is useful for removing a portion of a <code>Path</code>.
+ 
+      <!-- Make this illustration a letter.  LDF 2003.07.16. -->
+      <pre class="example">          Point P0(1, 1);
+           Point P1(2, 1);
+           Point P2(2, 3);
+           Point P3(-1, 1);
+           Path p("--", false, &amp;origin, &amp;P0, &amp;P1, &amp;P2, &amp;P3, 0);
+           p.draw(black, "", "pencircle scaled 3mm");
+           p.undraw("", "pencircle scaled 1mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF132.png"
+ alt="[Figure 132. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 132. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>unfill</b> ([<var>Picture&amp; picture = </var><code>current_picture</code>])<var><a name="index-unfill-599"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code> and sets
+ its <code>fill_draw_value</code> to <code>UNFILL</code>
+ 
+         <p>This function is useful for removing a portion of a filled region.
+ 
+      <pre class="example">          Point pt[4];
+           pt[0].set(-2, -2);
+           pt[1].set(2, -2);
+           pt[2].set(2, 2);
+           pt[3].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3], 0);
+           p.draw();
+           p.dotlabel();
+           p.filldraw(black, gray);
+           p.scale(.5, .5);
+           p.unfill();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF133.png"
+ alt="[Figure 133. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 133. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>unfilldraw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = current_picture</var>]]]])<var><a name="index-unfilldraw-600"></a></var><br>
+ &mdash; Function: void <b>unfilldraw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-unfilldraw-601"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>UNFILLDRAW</code>, and
+ the values of its
+ <code>draw_color</code>, <code>dashed</code>, and <code>pen</code> according to the
+ arguments.  While the default for <var>ddraw_color</var> is
+ <code>*Colors::background_color</code>, any other <code>Color</code> can be used,
+ so that <code>unfilldraw()</code> can unfill a <code>Path</code> and draw an outline
+ around it.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>This function is similar to <code>unfill()</code>
+ (see <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>),
+ except that the outline of the <code>Path</code> will be &ldquo;undrawn&rdquo; using the
+ pen specified with the <var>ppen</var> argument, or MetaPost's
+ <code>currentpen</code>, if no <var>ppen</var> argument is specified.  In addition,
+ the <code>Path</code> will be drawn using the <code>Color</code> specified in the
+ <var>ddraw_color</var> argument.  Since the default is
+ <code>*Colors::background_color</code>, the <code>Path</code> will be &ldquo;undrawn&rdquo;
+ unless a different <code>Color</code> is specified.
+ 
+      <pre class="example">          Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.fill(gray);
+           p.scale(.5, .5);
+           p.unfilldraw(black, "", "pensquare xscaled 3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF134.png"
+ alt="[Figure 134. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 134. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Hobby, <cite>A User's Manual for MetaPost</cite>, p.&nbsp;<!-- /@w -->32.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 4, p.&nbsp;<!-- /@w -->21ff. 
+ Hobby, <cite>A User's Manual for MetaPost</cite>, p.&nbsp;<!-- /@w -->32.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> The usual interpretation of <code>""</code> as a
+ position argument to a
+ labelling command would be to put it directly onto <code>*(Label.pt)</code>,
+ which in this case would put it onto the arrowhead.  Since this
+ will probably never be desirable, I've decided to use <code>""</code> to
+ suppress drawing axes.  Formerly, <code>draw_axes()</code> used three
+ additional arguments for this purpose.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Solids.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Drawing-and-Filling-Solids.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,167 ----
+ <html lang="en">
+ <head>
+ <title>Drawing and Filling Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
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+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Outputting-Solids.html#Outputting-Solids" title="Outputting Solids">
+ <link rel="next" href="Clearing-Solids.html#Clearing-Solids" title="Clearing Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
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+ </head>
+ <body>
+ <div class="node">
+ <a name="Drawing-and-Filling-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Clearing-Solids.html#Clearing-Solids">Clearing Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.13 Drawing and Filling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>draw</b> ([<var>const vector&lt;const Color*&gt; v = </var><code>Colors::default_color_vector</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw-828"></a></var><br>
+ <blockquote><p>Draws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of
+ <code>*this</code>, and puts a pointer to the copy onto
+ <var>picture</var><code>.shapes</code>.  The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be drawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for drawing the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>v</var>.  If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>v</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>v</var> is used to draw
+ the remaining <code>Shapes</code>.
+ 
+         <p>Currently, a <code>Solid</code> can
+ only be drawn with a single dash pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>fill</b> ([<var>const vector&lt;const Color*&gt; v = </var><code>Colors::default_color_vector</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-fill-829"></a></var><br>
+ <blockquote><p>Fills the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code> makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be filled,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for filling the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>v</var>. 
+ If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>v</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>v</var> is used to fill
+ the remaining <code>Shapes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>filldraw</b> ([<var>const vector&lt;const Color*&gt; draw_colors = Colors::default_color_vector, </var>[<var>const vector&lt;const Color*&gt; fill_colors = Colors::background_color_vector, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-filldraw-830"></a></var><br>
+ <blockquote><p>Filldraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var><code>.shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be filldrawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for drawing and filling the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>draw_colors</var> and <var>fill_colors</var>. 
+ If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>draw_colors</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>draw_colors</var> is used to draw
+ the remaining <code>Shapes</code>.  The same applies to <code>fill_colors</code>.
+ 
+         <p>Currently, a <code>Solid</code> can only be filldrawn with a single dash
+ pattern (<var>ddashed</var>), and pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>undraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-831"></a></var><br>
+ <blockquote><p>Undraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be undrawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>A <code>Solid</code> can currently only be undrawn using a single dash
+ pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>unfill</b> ([<var>Picture&amp; picture = </var><code>current_picture</code>])<var><a name="index-unfill-832"></a></var><br>
+ <blockquote><p>Unfills the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code> makes it a copy of
+ <code>*this</code>, and puts a pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be unfilled,
+ when <code>Picture::output()</code> is called.
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>unfilldraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-unfilldraw-833"></a></var><br>
+ &mdash; <code>const</code> virtual function: void <b>undraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-834"></a></var><br>
+ <blockquote><p>Unfilldraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of
+ <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>.  The data members of the
+ <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be
+ unfilldrawn, when <code>Picture::output()</code> is called.
+ 
+         <p>A <code>Solid</code> can currently only be unfilldrawn using a single dash
+ pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-and-Labeling-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Drawing-and-Labeling-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Drawing-and-Labeling-Points.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Drawing and Labeling Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Transforms.html#Transforms" title="Transforms">
+ <link rel="next" href="Paths.html#Paths" title="Paths">
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+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Drawing-and-Labeling-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Paths.html#Paths">Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transforms.html#Transforms">Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">5 Drawing and Labeling Points</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a>
+ <li><a accesskey="2" href="Labeling-Points-Intro.html#Labeling-Points-Intro">Labeling Points Intro</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dynamic-Allocation-of-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Dynamic-Allocation-of-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Dynamic-Allocation-of-Shapes.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,113 ----
+ <html lang="en">
+ <head>
+ <title>Dynamic Allocation of Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Global-Constants-and-Variables.html#Global-Constants-and-Variables" title="Global Constants and Variables">
+ <link rel="next" href="System-Information.html#System-Information" title="System Information">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Dynamic-Allocation-of-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="System-Information.html#System-Information">System Information</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">14 Dynamic Allocation of Shapes</h2>
+ 
+ <div class="defun">
+ &mdash; Template function: <code>template &lt;class C&gt; C*</code> <b>create_new</b> (<var>const C* arg</var>)<var><a name="index-create_005fnew-151"></a></var><br>
+ &mdash; Template function: <code>template &lt;class C&gt; C*</code> <b>create_new</b> (<var>const C&amp; arg</var>)<var><a name="index-create_005fnew-152"></a></var><br>
+ <blockquote><p>These functions dynamically allocate an object derived from
+ <code>Shape</code> on the free store,
+ returning a pointer to the type of the <code>Shape</code> and setting
+ <code>on_free_store</code> to <code>true</code>.
+ 
+         <p>If a non-zero pointer or a reference is passed to <code>create_new()</code>,
+ the new object will be a copy of <var>arg</var>.
+ 
+         <p>It is not possible to instantiate more than one specialization of
+ <code>create_new()</code> that takes no argument, because calls to these
+ functions would be ambiguous.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to <code>create_new()</code>
+ as its argument.
+ 
+         <p><code>create_new</code> is called like this:
+ 
+      <pre class="example">          Point* p = create_new&lt;Point&gt;(0);
+           p-&gt;show("*p:");
+           -| *p: (0, 0, 0)
+           
+           Color c(.3, .5, .25);
+           Color* d = create_new&lt;Color&gt;(c);
+           d-&gt;show("*d:");
+           -|
+           *d:
+           name ==
+           use_name == 0
+           red_part == 0.3
+           green_part == 0.5
+           blue_part == 0.25
+           
+           
+           Point a0(3, 2.5, 6);
+           Point a1(10, 11, 14);
+           Path q(a0, a1);
+           Path* r = create_new&lt;Path&gt;(&amp;q);
+           r-&gt;show("*r:");
+           -|
+           *r:
+           points.size() == 2
+           connectors.size() == 1
+           (3, 2.5, 6) -- (10, 11, 14);
+ </pre>
+         <p>Specializations of this template function are currently declared for
+ <code>Color</code>, <code>Point</code>, <code>Path</code>, <code>Reg_Polygon</code>,
+ <code>Rectangle</code>, <code>Ellipse</code>, <code>Circle</code>, <code>Solid</code>, and
+ <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+ <!-- system.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Constructors-and-Setting-Functions.html
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*** 0 ****
--- 1,124 ----
+ <html lang="en">
+ <head>
+ <title>Ellipse Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Ellipse-Data-Members.html#Ellipse-Data-Members" title="Ellipse Data Members">
+ <link rel="next" href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses" title="Performing Transformations on Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipse-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Ellipse</b> (<var>void</var>)<var><a name="index-Ellipse-715"></a></var><br>
+ <blockquote><p>Creates an empty <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Ellipse</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = DEFAULT_NUMBER_OF_POINTS</var>]]]])<var><a name="index-Ellipse-716"></a></var><br>
+ <blockquote><p>Creates an <code>Ellipse</code> in the x-z plane, centered at the origin, with
+ its horizontal axis
+ == <var>aaxis_h</var> and its vertical axis == <var>aaxis_v</var>.  If
+ any of the arguments <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> is
+ non-zero, the <code>Ellipse</code> is rotated about the x, y, and z-axis in
+ that order, by the amounts indicated by the corresponding arguments. 
+ Finally, the <code>Ellipse</code> is shifted such that its
+ center comes to lie at <var>ccenter</var>.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF159.png"
+ alt="[Figure 159. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 159. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Ellipse e(P, 6, 4, 15, 12, 11);
+           e.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF160.png"
+ alt="[Figure 160. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 160. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = DEFAULT_NUMBER_OF_POINTS</var>]]]])<var><a name="index-set-717"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Ellipse* <b>create_new&lt;Ellipse&gt;</b> (<var>const Ellipse* e</var>)<var><a name="index-create_005fnew_003cEllipse_003e-718"></a></var><br>
+ &mdash; : Ellipse* <b>create_new&lt;Ellipse&gt;</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-create_005fnew_003cEllipse_003e-719"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Ellipses</code>. 
+ They create a <code>Ellipse</code> on the free store and allocate memory for it using
+ <code>new(Ellipse)</code>.  They return a pointer to the new <code>Ellipse</code>.
+ 
+         <p>If <var>e</var> is a non-zero pointer or a reference,
+ the new <code>Ellipse</code> will be a copy of
+ <var>e</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Ellipse&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,105 ----
+ <html lang="en">
+ <head>
+ <title>Ellipse Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="next" href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions" title="Ellipse Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipse-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variables: Point <b>focus0</b><var><a name="index-focus0-708"></a></var><br>
+ &mdash; : Point <b>focus1</b><var><a name="index-focus1-709"></a></var><br>
+ <blockquote><p>The foci of the <code>Ellipse</code>.  They are located on the major axis of
+ the <code>Ellipse</code> at a distance of <code>linear_eccentricity</code> from
+ <code>center</code>, on opposite sides of the minor axis. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>linear_eccentricity</b><var><a name="index-linear_005feccentricity-710"></a></var><br>
+ <blockquote><p>The linear eccentricity of the <code>Ellipse</code> e, such that
+ e = \sqrta^2 - b^2,
+ where a and b are half the lengths of the major
+ and minor axes, respectively.  Let h stand for <code>axis_h</code> and v
+ for <code>axis_v</code>.  If h&gt;v, then a = h/2 and b = v/2.  If v&gt;h,
+ then a =v/2 and b = h/2.  If h = v, then the <code>Ellipse</code> is
+ circular (but not an object of type  <code>Circle</code>!), and a = b = v/2 = h/2.
+ 
+         <p>The linear eccentricity is the distance along the major axis of the
+ <code>Ellipse</code> from <code>center</code> to <code>focus0</code> and <code>focus1</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>numerical_eccentricity</b><var><a name="index-numerical_005feccentricity-711"></a></var><br>
+ <blockquote><p>The numerical eccentricity \epsilon of the <code>Ellipse</code>,
+ such
+ that \epsilon = e/a &lt; 1, where e is the linear eccentricity of the
+ <code>Ellipse</code>, and a is half the length of the major axis of the
+ <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variables: real <b>axis_h</b><var><a name="index-axis_005fh-712"></a></var><br>
+ &mdash; : real <b>axis_v</b><var><a name="index-axis_005fv-713"></a></var><br>
+ <blockquote><p>The horizontal and vertical axes, respectively, of the <code>Ellipse</code>.
+ 
+         <p>Actually, they are only or vertical
+ horizontal by convention, since there are no restrictions on the
+ orientation of an <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected static variable: unsigned short <b>DEFAULT_NUMBER_OF_POINTS</b><var><a name="index-DEFAULT_005fNUMBER_005fOF_005fPOINTS-714"></a></var><br>
+ <blockquote><p>The number of <code>Points</code> on an <code>Ellipse</code>, unless another number
+ is specified when an <code>Ellipse</code> constructor is invoked. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Intersections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Intersections.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Intersections.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,256 ----
+ <html lang="en">
+ <head>
+ <title>Ellipse Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses" title="Returning Elements and Information for Ellipses">
+ <link rel="next" href="Solving-Ellipses.html#Solving-Ellipses" title="Solving Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipse-Intersections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.9 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoints-750"></a></var><br>
+ &mdash; <code>const</code> virtual function: bool_point_pair <b>intersection_points</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-751"></a></var><br>
+ <blockquote><p>These functions return the intersection points of a line with an
+ <code>Ellipse</code>.  In the first version, the line is specified by the two
+ <code>Point</code> arguments. 
+ In the second version, <var>p</var><code>.is_linear()</code> must return <code>true</code>,
+ otherwise, <code>intersection_points()</code> issues an error message and
+ returns <code>INVALID_BOOL_POINT_PAIR</code>.
+ 
+         <p>If the line and the <code>Ellipse</code> are coplanar, there can be at most two
+ intersection points.  Otherwise, there can be at most one.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 7, 30, 30, 30);
+           e.shift(3, 0, 3);
+           Point p0 = e.get_center().mediate(e.get_point(3));
+           Point normal = e.get_normal();
+           Point A = normal;
+           A *= 2.5;
+           A.shift(p0);
+           Point B = normal;
+           B *= -2.5;
+           B.shift(p0);
+           bool_point_pair bpp = e.intersection_points(A, B);
+           bpp.first.pt.dotlabel("$i_0$", "rt");
+           Point C = e.get_point(15).mediate(e.get_point(11), 1.25);
+           Point D = e.get_point(11).mediate(e.get_point(15), 1.5);
+           Path q = C.draw(D);
+           bpp = e.intersection_points(q);
+           bpp.first.pt.dotlabel("$i_1$", "llft");
+           bpp.second.pt.dotlabel("$i_2$", "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF167.png"
+ alt="[Figure 167. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 167. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool_point_quadruple <b>intersection_points</b> (<var>Ellipse e, </var>[<var>const real step = 3, </var>[<var>bool verbose = </var><code>false</code>]])<var><a name="index-intersection_005fpoints-752"></a></var><br>
+ <blockquote><p>Returns the intersection points of two <code>Ellipses</code>.  Two <code>Ellipses</code>
+ can intersect at at most four points.
+ 
+         <p>Let <var>bpq</var> be the <code>bool_point_quadruple</code> returned by
+ <code>intersection_points()</code>.  If one or more intersection points are
+ found, the corresponding <code>Points</code> are stored in the
+ <code>pt</code> elements of the four <code>bool_points</code> belonging to
+ <var>bpq</var>, otherwise <code>INVALID_POINT</code>.  If a <code>Point</code> is found, the
+ <code>b</code> element of the <code>bool_point</code> will be <code>true</code>, otherwise
+ <code>false</code>.
+ 
+         <p>The <var>step</var> argument is used when the <code>Ellipses</code> are coplanar
+ and either have different centers or the vertical axis of one <code>Ellipse</code> is
+ colinear with the horizontal axis of the other (and vice versa).  In
+ these cases, the intersection points must be found by an iterative
+ routine.  A <code>Point</code> p travels around the perimeter of <code>*this</code>,
+ and its location with respect to <var>e</var> is tested.  <var>step</var> is the
+ angle of rotation used for stepping around the perimeter of
+ <code>*this</code>.  The default value, 3, should be adequate, unless the
+ <code>Ellipses</code> differ greatly in size.
+ 
+         <p>If the <var>verbose</var> argument is <code>true</code>,
+ <code>intersection_points()</code> will print information about the
+ intersection points to standard output.
+ 
+         <p>In [next figure]
+ , the <code>Ellipses</code> e and f both lie in the x-z
+ plane, are centered at the origin, and intersect at four points.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 2);
+           Ellipse f(origin, 2, 5);
+           bool_point_quadruple bpq = e.intersection_points(f);
+           bpq.first.pt.dotlabel(1, "llft");
+           bpq.second.pt.dotlabel(2, "urt");
+           bpq.third.pt.dotlabel(3, "ulft");
+           bpq.fourth.pt.dotlabel(4, "lrt");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF168.png"
+ alt="[Figure 168. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 168. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , e and f are coplanar, but don't lie in a major plane,
+ have different centers, and only intersect at two points.
+ 
+      <pre class="example">          Ellipse e(origin, 4, 2);
+           Ellipse f(origin, 2, 5);
+           f.shift(0, 0, 1);
+           f.rotate(0, 15);
+           f.shift(1, 0, 1);
+           e *= f.shift(-.25, 1, -1);
+           e *= f.rotate(10, -12.5, 3);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1, "urt");
+           bpq.second.pt.dotlabel(2, "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF169.png"
+ alt="[Figure 169. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 169. 
+ <br>
+ </p>
+ 
+         <p>If the planes of the <code>Ellipses</code> are parallel, there are, of course,
+ no intersection points.  If the <code>Ellipses</code> are non-coplanar, and
+ their planes are not parallel to each other,
+ <code>intersection_points()</code> first finds the line of intersection of the
+ planes of the <code>Ellipses</code>.  It then returns the <code>Points</code> of
+ intersection of this line with the <code>Ellipses</code>, if they exist.  If
+ the <var>verbose</var> argument is <code>true</code>, information about the
+ <code>Points</code> is printed to standard output.
+ 
+         <p>In [next figure]
+ , the two <code>Ellipses</code> lie in skew planes.  The plane
+ of f intersects with e at the <code>Points</code> labelled &ldquo;1&rdquo; and &ldquo;2&rdquo;,
+ while the plane of e intersects with f at the <code>Points</code> labelled
+ &ldquo;3&rdquo; and &ldquo;4&rdquo;.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 3);
+           Ellipse f(origin, 2, 5);
+           f.rotate(0, 0, 30);
+           f.rotate(0, 10);
+           f.rotate(45);
+           f.shift(1.5, 1);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1);
+           bpq.second.pt.dotlabel(2);
+           bpq.third.pt.dotlabel(3, "rt");
+           bpq.fourth.pt.dotlabel(4, "urt");
+           -| First point lies on the perimeter of *this.
+              First point lies inside e.
+              Second point lies on the perimeter of *this.
+              Second point lies outside e.
+              Third point lies outside *this.
+              Third point lies on the perimeter of e.
+              Fourth point lies inside *this.
+              Fourth point lies on the perimeter of e.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF170.png"
+ alt="[Figure 170. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 170. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the two <code>Ellipses</code> lie in skew planes.  The plane of
+ f intersects with e at the <code>Points</code> labelled &ldquo;1&rdquo; and &ldquo;2&rdquo;. 
+ The plane of e does not intersect with f, so <code>bpq.third.pt</code>
+ and <code>bpq.fourth.pt</code> are <code>INVALID_POINT</code>.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 3);
+           Ellipse f(origin, 2, 5, 45);
+           f.shift(0, 2.5, 3);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1);
+           bpq.second.pt.dotlabel(2);
+           -| First point lies on the perimeter of *this.
+              First point lies outside e.
+              Second point lies on the perimeter of *this.
+              Second point lies outside e.
+              Third intersection point is INVALID_POINT.
+              Fourth intersection point is INVALID_POINT.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF171.png"
+ alt="[Figure 171. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 171. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Operators.html
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+ <html lang="en">
+ <head>
+ <title>Ellipse Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses" title="Performing Transformations on Ellipses">
+ <link rel="next" href="Labeling-Ellipses.html#Labeling-Ellipses" title="Labeling Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
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+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipse-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Ellipse&amp; <b>operator=</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-operator_003d-721"></a></var><br>
+ <blockquote><p>Makes the <code>Ellipse</code> a copy of <var>e</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-722"></a></var><br>
+ <blockquote><p>Calls <code>do_transform(t, true)</code>, and returns the latter's return
+ value. 
+ See <a href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Ellipse Reference; Performing Transformations</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipse-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipse-Reference.html
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+ <html lang="en">
+ <head>
+ <title>Ellipse Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="next" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipse-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">31 Ellipse Reference</h2>
+ 
+ <p><a name="index-Ellipse-707"></a>Class <code>Ellipse</code> is defined in <samp><span class="file">ellipses.web</span></samp>. 
+ It is derived from <code>Reg_Cl_Plane_Curve</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a>
+ <li><a accesskey="2" href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>
+ <li><a accesskey="4" href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a>
+ <li><a accesskey="5" href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a>
+ <li><a accesskey="6" href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>
+ <li><a accesskey="7" href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a>
+ <li><a accesskey="8" href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>
+ <li><a accesskey="9" href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Intersections</a>
+ <li><a href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a>
+ <li><a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipses-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipses-Getstart.html
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+ <html lang="en">
+ <head>
+ <title>Ellipses Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="prev" href="Rectangles-Getstart.html#Rectangles-Getstart" title="Rectangles Getstart">
+ <link rel="next" href="Circles-Getstart.html#Circles-Getstart" title="Circles Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipses-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circles-Getstart.html#Circles-Getstart">Circles Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangles-Getstart.html#Rectangles-Getstart">Rectangles Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">7.3 Ellipses</h3>
+ 
+ <p><code>Ellipse</code> has a constructor similar to those for
+ <code>Reg_Polygon</code> and <code>Rectangle</code>.  The first argument is the
+ center of the <code>Ellipse</code>, and the following two specify the lengths
+ of the horizontal and vertical axes respectively.  The <code>Ellipse</code> is
+ first created in the x-z plane, centered about the origin.  The
+ horizontal axis lies along the x-axis and the vertical axis lies along
+ the z-axis.  The three subsequent arguments specify the amounts of
+ rotation about the x, y, and z-axes respectively and default to 0. 
+ Finally,
+ <code>Ellipse</code> is shifted such that its center comes to lie at the
+ <code>Point</code> specified in the first argument.
+ 
+ <pre class="example">     Point pt(-1, 1, 1);
+      Ellipse e(pt, 3, 6, 90);
+      e.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF33.png"
+ alt="[Figure 33. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 33. 
+ <br>
+ </p>
+ 
+    <p>As you may expect, this constructor has a corresponding setting
+ function:
+ 
+ <!-- !! TO DO: Simplify this example.  LDF 2003.08.15. -->
+ <pre class="example">     Ellipse e;
+      real h_save = 1.5;
+      real v_save = 2;
+      real h = h_save;
+      real v = v_save;
+      Point p(-1);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+            e.set(p, h, v, 90);
+            e.draw();
+            h_save += .25;
+            v_save += .25;
+            h *= sqrt(h_save);
+            v *= sqrt(v_save);
+            p.shift(0, 0, 2);
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF34.png"
+ alt="[Figure 34. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 34. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ellipses-for-Rectangles.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ellipses-for-Rectangles.html
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+ <html lang="en">
+ <head>
+ <title>Ellipses for Rectangles - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Querying-Rectangles.html#Querying-Rectangles" title="Querying Rectangles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ellipses-for-Rectangles"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.6 Ellipses</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>out_ellipse</b> (<code>void</code>)<var><a name="index-out_005fellipse-688"></a></var><br>
+ <blockquote><p>Returns the smallest <code>Ellipse</code> that surrounds the <code>Rectangle</code>.
+ 
+      <pre class="example">          Point P(-1, -1, 3);
+           Rectangle r(P, 3, 4, 60, 30, 15);
+           Ellipse e = r.out_ellipse();
+           e.filldraw(black, gray);
+           r.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF152.png"
+ alt="[Figure 152. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 152. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>in_ellipse</b> (<code>void</code>)<var><a name="index-in_005fellipse-689"></a></var><br>
+ <blockquote><p>Returns the <code>Ellipse</code> enclosed by the <code>Rectangle</code>.
+ 
+      <pre class="example">          Point P(-1, -1, 3);
+           Rectangle r(P, 3, 4, 60, 30, 15);
+           Ellipse e = r.in_ellipse();
+           r.filldraw(black, gray);
+           e.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF153.png"
+ alt="[Figure 153. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 153. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>draw_out_ellipse</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fout_005fellipse-690"></a></var><br>
+ <blockquote><p>Draws the smallest <code>Ellipse</code> that surrounds the <code>Rectangle</code>. 
+ The arguments are like those of <code>Path::draw()</code>
+ (see <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>). 
+ The return value is the surrounding <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>draw_in_ellipse</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fin_005fellipse-691"></a></var><br>
+ <blockquote><p>Draws the <code>Ellipse</code> enclosed by the <code>Rectangle</code>. 
+ The arguments are like those of <code>Path::draw()</code>
+ (see <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>). 
+ The return value is the enclosed <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <!-- rcpcurve.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Endianness.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Endianness.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Endianness.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Endianness.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Endianness - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="System-Information.html#System-Information" title="System Information">
+ <link rel="prev" href="System-Information.html#System-Information" title="System Information">
+ <link rel="next" href="Register-Width.html#Register-Width" title="Register Width">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Endianness"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Register-Width.html#Register-Width">Register Width</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="System-Information.html#System-Information">System Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="System-Information.html#System-Information">System Information</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">15.1 Endianness</h3>
+ 
+ <div class="defun">
+ &mdash; Function: signed short <b>get_endianness</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-get_005fendianness-153"></a></var><br>
+ <blockquote><p>Returns the following values:
+ 
+           <dl>
+ <dt>0<dd>if the processor is little-endian.
+ 
+           <br><dt>1<dd>if the processor is big-endian.
+ 
+           <br><dt>-1<dd>if the endianness cannot be determined.
+ 
+         </dl>
+ 
+         <p>It is called by <code>is_little_endian()</code> and
+ <code>is_big_endian()</code>.
+ 
+         <p>If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output.
+ 
+         <p>This function has been adapted from
+ Harbison, Samuel&nbsp;<!-- /@w -->P., and Guy&nbsp;<!-- /@w -->L. Steele Jr. 
+ <cite>C, A Reference Manual</cite>, pp.&nbsp;<!-- /@w -->163&ndash;164. 
+ This book has the clearest explanation of endianness that I've found so
+ far.
+ 
+         <p>This is the C++
+  code:
+ 
+      <pre class="example">          signed short
+           System::get_endianness(const bool verbose)
+           {
+             union {
+               long Long;
+               char Char[sizeof(long)];
+             } u;
+             u.Long = 1;
+             if (u.Char[0] == 1)
+               {
+                 if (verbose)
+                   cout &lt;&lt; "Processor is little-endian."
+                        &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return 0;
+               }
+             else if (u.Char[sizeof(long) - 1] == 1)
+               {
+                 if (verbose)
+                   cout &lt;&lt; "Processor is big-endian."
+                        &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return 1;
+               }
+             else
+               {
+                 cerr &lt;&lt; "ERROR! In System::get_endianness():\n"
+                      &lt;&lt; "Can't determine endianness. Returning -1"
+                      &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return -1;
+               }
+           }
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_big_endian</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-is_005fbig_005fendian-154"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the processor is big-endian, otherwise <code>false</code>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_little_endian</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-is_005flittle_005fendian-155"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the processor is little-endian, otherwise <code>false</code>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Epicycloids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Epicycloids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Epicycloids.html	Thu Jan  1 00:00:00 1970
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--- 1,147 ----
+ <html lang="en">
+ <head>
+ <title>Epicycloids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes" title="Roulettes and Involutes">
+ <link rel="prev" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes" title="Roulettes and Involutes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Epicycloids"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">Roulettes and Involutes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">33.2.1 Epicycloids</h4>
+ 
+ <!-- !! TO DO:  Check whether @code{epicycloid_pattern_3()} works.  If it -->
+ <!-- does, document it here.  LDF 2003.09.02. -->
+ <div class="defun">
+ &mdash; Function: unsigned int <b>epicycloid_pattern_1</b> (<var>real diameter_inner, real diameter_outer_start, real diameter_outer_end, real step, int arc_divisions, unsigned int offsets, </var>[<var>vector&lt;const Color*&gt; colors = </var><code>Colors::default_color_vector</code>])<var><a name="index-epicycloid_005fpattern_005f1-773"></a></var><br>
+ <blockquote><p>Draws a pattern consisting of epicycloids.  The  outer circle rolls
+ around the circumference of the inner circle and a <code>Point</code> on the
+ outer circle traces an epicycloid.
+ 
+         <p>If <var>offsets</var> is greater than 1, the outer circle is rotated
+ <var>offset</var> times around the center of the inner circle
+ by
+ 360 / offsets
+ (starting from the outer circle's original
+ position).  From each of these new positions, an epicycloid is drawn.
+ 
+         <p>While <var>diameter_outer_start</var> is
+ greater than or equal to <var>diameter_outer_end</var>, the diameter of the
+ outer circle is reduced by <var>step</var>, and another set of epicycloids is
+ traced, as described above.  Each time the diameter of
+ the outer circle is reduced, a new <code>Color</code> is taken from
+ <var>colors</var> for the drawing commands.  If there are more iterations
+ than <code>Colors</code>, the last <code>Color</code> on <var>colors</var> is used for
+ the remaining iterations.
+ 
+      <!-- !! TO DO:  Change function, so that the list is run through again. -->
+         <p>The arguments:
+           <dl>
+ <dt><code>real</code> <var>diameter_inner</var><dd>The diameter of the inner circle.
+ 
+           <br><dt><code>real</code> <var>diameter_outer_start</var><dd>The diameter of the outer circle for the first iteration.  It must be
+ greater than or equal to <var>diameter_outer_end</var>.
+ 
+           <br><dt><code>real</code> <var>diameter_outer_end</var><dd>The diameter of the outer circle for the last iteration. 
+ It must be
+ less than or equal to <var>diameter_outer_start</var>.
+ 
+           <br><dt><code>real</code> <var>step</var><dd>The amount by which the diameter of the outer circle is <em>reduced</em>
+ upon each iteration.
+ 
+           <br><dt><code>int</code> <var>arc_divisions</var><dd>The number of divisions of the circle used for calculating <code>Points</code>
+ on the epicycloid.  For instance, if <var>arc_divisions</var> is 90, then
+ the <code>Path</code> for each epicycloid will only have 4 <code>Points</code>,
+ since 360 / 90 = 4.
+ 
+           <br><dt><code>unsigned int</code> <var>offsets</var><dd>The number of epicycloids drawn upon each iteration.  Each one is
+ rotated by 360 / <var>offsets</var> around the center of the inner circle. 
+ <var>offsets</var> must be greater than or equal to 1.
+ 
+           <br><dt><code>vector&lt;const Color*&gt;</code> <var>colors</var><dd>Default: <code>Colors::default_color_vector</code>.  The <code>Colors</code> pointed
+ to by the pointers on this vector are used for drawing the epicycloids. 
+ One <code>Color</code> is used for each iteration.
+ 
+         </dl>
+ 
+         <p>Example:
+      <pre class="example">          epicycloid_pattern_1(5, 3, 3, 1, 72);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF180.png"
+ alt="[Figure 180. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 180. 
+ <br>
+ </p>
+ 
+         <p>Example:
+      <pre class="example">          default_focus.set(2, 5, -10, 2, 5, 10, 10);
+           epicycloid_pattern_1(5, 3, 3, 1, 36);
+           current_picture.output();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF181.png"
+ alt="[Figure 181. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 181. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- solid.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Faced-Solid-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Faced-Solid-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Faced-Solid-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Faced-Solid-Reference.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Faced Solid Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="next" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Faced-Solid-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">35 Faced Solid Reference</h2>
+ 
+ <p><a name="index-Solid_005fFaced-836"></a>Class <code>Solid_Faced</code> is defined in <samp><span class="file">solfaced.web</span></samp>. 
+ It is derived from <code>Solid</code> using public derivation.
+ 
+    <p><code>Solid_Faced</code> currently has no member functions.  It is intended
+ for use as a base class.  The classes <code>Cuboid</code> and
+ <code>Polyhedron</code> are derived from <code>Solid_Faced</code>. 
+ See <a href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>, and <a href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Focus Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Focus-Global-Variables.html#Focus-Global-Variables" title="Focus Global Variables">
+ <link rel="next" href="Focus-Operators.html#Focus-Operators" title="Focus Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Focus-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Focus-Operators.html#Focus-Operators">Focus Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.3 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Focus</b> (<var>void</var>)<var><a name="index-Focus-483"></a></var><br>
+ <blockquote><p>Creates an empty <code>Focus</code>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Focus</b> (<var>const real pos_x, const real pos_y, const real pos_z, const real dir_x, const real dir_y, const real dir_z, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-Focus-484"></a></var><br>
+ <blockquote><p>Constructs a <code>Focus</code> using the first three <code>real</code> arguments as
+ the x, y, and z-coordinates of <code>position</code>, and the fourth through the
+ sixth argument as the x, y, and z-coordinates of <code>direction</code>.  <var>dist</var>
+ specifies the distance of the <code>Focus</code>
+ from the plane of projection, <var>ang</var> the angle of rotation, which affects which
+ direction is considered to be &ldquo;up&rdquo;, and <var>ax</var> the major axis to
+ which the <code>Focus</code> is aligned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real pos_x, const real pos_y, const real pos_z, const real dir_x, const real dir_y, const real dir_z, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-set-485"></a></var><br>
+ <blockquote><p>Resets an existing <code>Focus</code>.  Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Focus</b> (<var>const Point&amp; pos, const Point&amp; dir, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-Focus-486"></a></var><br>
+ <blockquote><p>Constructs a <code>Focus</code> using <code>Point</code> arguments for
+ <code>position</code> and <code>direction</code>.  Otherwise, the arguments of this constructor
+ correspond to those of the one above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; pos, const Point&amp; dir, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-set-487"></a></var><br>
+ <blockquote><p>Resets an existing <code>Focus</code>.  Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Data-Members.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Focus Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="next" href="Focus-Global-Variables.html#Focus-Global-Variables" title="Focus Global Variables">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Focus-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Global Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>position</b><var><a name="index-position-474"></a></var><br>
+ <blockquote><p>The location of the <code>Focus</code> in the world coordinate system. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>direction</b><var><a name="index-direction-475"></a></var><br>
+ <blockquote><p>The direction of view from <code>position</code> into the scene. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>up</b><var><a name="index-up-476"></a></var><br>
+ <blockquote><p>The direction that will be at the top of the projected drawing. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>distance</b><var><a name="index-distance-477"></a></var><br>
+ <blockquote><p>The distance of the <code>Focus</code> from the plane of projection. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>angle</b><var><a name="index-angle-478"></a></var><br>
+ <blockquote><p>Used for determining the <code>up</code> direction. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: char <b>axis</b><var><a name="index-axis-479"></a></var><br>
+ <blockquote><p>The main axis onto which the <code>Focus</code> is transformed in order to
+ perform the perspective projection, z by default.
+ 
+         <p>It will normally not matter which axis is used, but it might be
+ advantageous to use a particular axis in some special situations. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-480"></a></var><br>
+ <blockquote><p>The <code>Transform</code>, which will be applied to the <code>Shapes</code> on the
+ <code>Picture</code>, when the latter is output.  The effect of this is
+ equivalent to transforming the <code>Focus</code>, so that it lies on a major
+ axis.
+ 
+      <pre class="example">          Focus f(5, 5, -10, 2, 4, 10, 10, 180);
+           &rArr;
+ </pre>
+         <pre class="display">          <code>f.transform</code> ==
+            0.989  -0.00733  -0.148  0
+            0       0.999    -0.0494 0
+            0.148   0.0488    0.988  0
+           -3.4    -4.47      0.865  1
+           
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>persp</b><var><a name="index-persp-481"></a></var><br>
+ <blockquote><p>The <code>Transform</code> representing the perspective transformation for a
+ particular <code>Focus</code>. 
+ Let d stand for <code>distance</code>, then
+      <pre class="display">          <code>persp</code> ==
+           1 0 0  0
+           0 1 0  0
+           0 0 0 1/d
+           0 0 0  1
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Global-Variables.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Global-Variables.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Global-Variables.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Focus Global Variables - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Focus-Data-Members.html#Focus-Data-Members" title="Focus Data Members">
+ <link rel="next" href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions" title="Focus Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Focus-Global-Variables"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.2 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Focus <b>default_focus</b><var><a name="index-default_005ffocus-482"></a></var><br>
+ <blockquote><p>Effectively, the default <code>Focus</code> in <code>Picture::output()</code>. 
+ See <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>. 
+ It's not really the default, but the version of
+ <code>output()</code> that doesn't take a
+ <code>Focus</code> argument calls another version
+ that does take one, passing <code>default_focus</code> to the
+ latter as its <code>Focus</code> argument.
+ 
+         <p>It's necessary to do this in such a roundabout way,
+ because <code>Picture::output()</code> must be declared before
+ <code>class Focus</code> is completely defined and <code>default_focus</code> is declared.
+ 
+         <p>The declaration &lsquo;<samp><span class="samp">Focus&amp; f = default_focus;</span></samp>&rsquo; makes <code>f</code> a
+ reference to <code>default_focus</code>, i.e., it makes <code>f</code> another name
+ for <code>default_focus</code>.  This may be convenient, if you don't feel
+ like typing <code>default_focus</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Operators.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Focus Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions" title="Focus Constructors and Setting Functions">
+ <link rel="next" href="Modifying-Focuses.html#Modifying-Focuses" title="Modifying Focuses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Focus-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Focuses.html#Modifying-Focuses">Modifying Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: const Focus&amp; <b>operator=</b> (<var>const Focus&amp; f</var>)<var><a name="index-operator_003d-488"></a></var><br>
+ <blockquote><p>Sets the <code>Focus</code> to <var>f</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focus-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focus-Reference.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Focus Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="next" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Focus-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Line-Reference.html#Line-Reference">Line Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Reference.html#Point-Reference">Point Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">23 Focus Reference</h2>
+ 
+ <p><a name="index-Focus-473"></a>Class <code>Focus</code> is defined in <samp><span class="file">points.web</span></samp>. 
+ <code>Focuses</code> are used when creating a perspective projection. 
+ They represent the center of projection and can be thought of like a
+ camera viewing the scene.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a>
+ <li><a accesskey="2" href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Global Variables</a>
+ <li><a accesskey="3" href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>
+ <li><a accesskey="4" href="Focus-Operators.html#Focus-Operators">Focus Operators</a>
+ <li><a accesskey="5" href="Modifying-Focuses.html#Modifying-Focuses">Modifying Focuses</a>
+ <li><a accesskey="6" href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a>
+ <li><a accesskey="7" href="Showing-Focuses.html#Showing-Focuses">Showing Focuses</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focuses-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Focuses-Getstart.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Focuses-Getstart.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Focuses Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
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+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
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+ </head>
+ <body>
+ <div class="node">
+ <a name="Focuses-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Projections.html#Projections">Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Pictures.html#Pictures">Pictures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">9.2 Focuses</h3>
+ 
+ <p><a name="index-focus-75"></a>The perspective transformation requires a focus;  as a consequence,
+ outputting a <code>Picture</code> requires an object of class
+ <code>Focus</code>. 
+ <code>Picture::output()</code> takes an optional pointer-to-<code>Focus</code>
+ argument, which is 0 by default.  If the default is used, (or 0 is
+ passed explicitly), the global variable <code>default_focus</code> is used. 
+ See <a href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Reference; Global Variables</a>.
+ 
+    <p>A <code>Focus</code> can be thought of as the observer of a scene, or a
+ camera.  It contains a <code>Point position</code> for its location with
+ respect to 3DLDF's coordinate system, and a <code>Point direction</code>,
+ specifying the direction where the observer is looking, or where the
+ camera is pointed.  The <code>Focus</code> can be rotated freely about the
+ line
+ PD,
+ where P stands for <code>position</code> and
+ D
+ for <code>direction</code>,
+ so a <code>Focus</code> contains a third <code>Point up</code>, to indicate which
+ direction will be &ldquo;up&rdquo; on the projection, when a <code>Picture</code> is
+ projected.
+ 
+    <p>The projection plane q
+ will always be perpendicular to
+ the line PD,
+ or to put it another way,
+ the line PD,
+ is normal to q.
+ 
+    <p>Unlike the traditional perspective construction, where the distance from
+ the focus to the center of vision fixes both the location of the focus
+ in space, and its distance to the
+ picture plane,<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ these two parameters can be set independently when the perspective
+ transformation is used. 
+ The distance from a <code>Focus</code> to the picture plane is stored in the
+ data member <code>distance</code>, of type <code>real</code>.
+ 
+    <p>A <code>Focus</code> can be declared using two <code>Point</code> arguments for
+ <code>position</code> and <code>direction</code>, and a <code>real</code> argument for
+ <code>distance</code>, in that order.
+ 
+ <pre class="example">     Point pos(0, 5, -10);
+      Point dir(0, 5, 10);
+      Focus f(pos, dir, 10);
+      
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF60.png"
+ alt="[Figure 60. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 60. 
+ <br>
+ </p>
+ 
+    <p>The &ldquo;up&rdquo; direction is calculated by the <code>Focus</code> constructor
+ automatically.  An optional argument can be used to specify the angle by
+ which to rotate the <code>Focus</code> about
+ the line PD.
+ 
+ <pre class="example">     Point pos(0, 5, -10);
+      Point dir(0, 5, 10);
+      Focus f(pos, dir, 10, 30);
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF61.png"
+ alt="[Figure 61. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 61. 
+ <br>
+ </p>
+ 
+    <p>Alternatively, a <code>Focus</code> can be declared using three <code>real</code>
+ arguments each for the x, y, and z-coordinates of <code>position</code> and
+ <code>direction</code>, respectively, followed by the <code>real</code> arguments
+ for <code>distance</code> and the angle of rotation:
+ 
+ <pre class="example">     Focus f(3, 5, -5, 0, 3, 0, 10, 10);
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF62.png"
+ alt="[Figure 62. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 62. 
+ <br>
+ </p>
+ 
+    <p><code>Focuses</code> contain two <code>Transforms</code>, <code>transform</code> and <code>persp</code>. 
+ A <code>Focus</code> can be located anywhere in 3DLDF's coordinate system. 
+ However, performing the perspective projection is more convenient, if
+ <code>position</code> and <code>direction</code> both lie on one of the major axes,
+ and the plane of projection corresponds to one of the major planes. 
+ <code>transform</code> is the transformation which would have this affect on
+ the <code>Focus</code>, and is calculated by the <code>Focus</code> constructor. 
+ When a <code>Picture</code> is output using that <code>Focus</code>,
+ <code>transform</code> is applied to all of the <code>Shapes</code> on the
+ <code>Picture</code>, maintaining the relationship between the <code>Focus</code>
+ and the <code>Shapes</code>, while making it easier to calculate the
+ projection.  The <code>Focus</code> need never be
+ transformed by <code>transform</code>. 
+ The actual perspective transformation is stored
+ in <code>persp</code>.
+ 
+    <p><code>Focuses</code> can be moved by using one of the setting functions, which
+ take the same arguments as the constructors. 
+ <!-- !! TO DO: -->
+ Currently, there are no affine transformation functions for moving
+ <code>Focuses</code>, but I plan to add them soon.  If 3DLDF is used for
+ making
+ <a name="index-animation-76"></a>animation, resetting the <code>Focus</code> can be used to simulate camera
+ movements:
+ 
+ <pre class="example">     beginfig(1);
+      Point pos(2, 10, 3);
+      Point dir(2, -10, 3);
+      Focus f;
+      Point center(2, 0, 3);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+          f.set(pos, dir, 10, (15 * i));
+          Rectangle r(center, 3, 3);
+          r.draw();
+          current_picture.output(f);
+          current_picture.clear();
+          pos.shift(1, 1, 0);
+          dir.rotate(0, 0, 10);
+        }
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF63.png"
+ alt="[Figure 63. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 63. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , <code>current_picture</code> is output 5 times within a single
+ MetaPost figure.  Since the file passed to MetaPost is called
+ <samp><span class="file">persp.mp</span></samp>, the file of Encapsulated PostScript (EPS) code
+ containing [the previous figure]
+  is called <samp><span class="file">persp.1</span></samp>. 
+ <a name="index-animation-77"></a>To use this technique for making an animation, it's necessary to output
+ the <code>Picture</code> into multiple MetaPost figures.
+ 
+ <pre class="example">     Point pos(2, 10, 3);
+      Point dir(2, -10, 3);
+      Focus f;
+      Point center(2, 0, 3);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+          f.set(pos, dir, 10, (15 * i));
+          Rectangle r(center, 3, 3);
+          r.draw();
+          beginfig(i+1);
+          current_picture.output(f);
+          endfig();
+          current_picture.clear();
+          pos.shift(1, 1, 0);
+          dir.rotate(0, 0, 10);
+        }
+ </pre>
+    <p>Now, running MetaPost on <samp><span class="file">persp.mp</span></samp> generates the EPS files
+ <samp><span class="file">persp.1</span></samp>, <samp><span class="file">persp.2</span></samp>, <samp><span class="file">persp.3</span></samp>, <samp><span class="file">persp.4</span></samp>, and
+ <samp><span class="file">persp.5</span></samp>, containing the five separate drawings of <var>r</var>. 
+ <!-- !! TO DO:  Add a node ``Animation''.  When I've done so, put a cross -->
+ <!-- reference here.  LDF 2003.08.15. -->
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> I believe this
+ to be true, but I'm not
+ certain.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
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+ <html lang="en">
+ <head>
+ <title>Function Index - 3DLDF User and Reference Manual</title>
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+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
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+ <body>
+ <div class="node">
+ <a name="Function-Index"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Concept-Index.html#Concept-Index">Concept Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Data-Type-and-Variable-Index.html#Data-Type-and-Variable-Index">Data Type and Variable Index</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="unnumbered">Function Index</h2>
+ 
+ 
+ 
+ <ul class="index-fn" compact>
+ <li><a href="Aligning-Paths-with-an-Axis.html#index-align_005fwith_005faxis-581"><code>align_with_axis</code></a>: <a href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a></li>
+ <li><a href="Alignment-with-an-Axis-for-Transforms.html#index-align_005fwith_005faxis-290"><code>align_with_axis</code></a>: <a href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a></li>
+ <li><a href="Vector-Operations.html#index-angle-430"><code>angle</code></a>: <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-angle_005fpoint-749"><code>angle_point</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-angle_005fpoint-701"><code>angle_point</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Appending-to-Paths.html#index-append-560"><code>append</code></a>: <a href="Appending-to-Paths.html#Appending-to-Paths">Appending to Paths</a></li>
+ <li><a href="Applying-Transformations-to-Solids.html#index-apply_005ftransform-818"><code>apply_transform</code></a>: <a href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">Applying Transformations to Solids</a></li>
+ <li><a href="Applying-Transformations-to-Paths.html#index-apply_005ftransform-584"><code>apply_transform</code></a>: <a href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">Applying Transformations to Paths</a></li>
+ <li><a href="Applying-Transformations-to-Points.html#index-apply_005ftransform-424"><code>apply_transform</code></a>: <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Applying Transformations to Points</a></li>
+ <li><a href="Applying-Transformations-to-Shapes.html#index-apply_005ftransform-249"><code>apply_transform</code></a>: <a href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a></li>
+ <li><a href="I_002fO-Functions.html#index-beginfig-230"><code>beginfig</code></a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint-356"><code>bool_point</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint_003a_003aoperator_003d-358"><code>bool_point::operator=</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint_005fquadruple-361"><code>bool_point_quadruple</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005fpoint_005fquadruple_003a_003aoperator_003d-363"><code>bool_point_quadruple::operator=</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005freal_005fpoint-365"><code>bool_real_point</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#index-bool_005freal_005fpoint_003a_003aoperator_003d-368"><code>bool_real_point::operator=</code></a>: <a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="Circle-Constructors-and-Setting-Functions.html#index-Circle-761"><code>Circle</code></a>: <a href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="Modifying-Points.html#index-clean-413"><code>clean</code></a>: <a href="Modifying-Points.html#Modifying-Points">Modifying Points</a></li>
+ <li><a href="Cleaning-Transforms.html#index-clean-292"><code>clean</code></a>: <a href="Cleaning-Transforms.html#Cleaning-Transforms">Cleaning Transforms</a></li>
+ <li><a href="Clearing-Solids.html#index-clear-835"><code>clear</code></a>: <a href="Clearing-Solids.html#Clearing-Solids">Clearing Solids</a></li>
+ <li><a href="Clearing-Paths.html#index-clear-562"><code>clear</code></a>: <a href="Clearing-Paths.html#Clearing-Paths">Clearing Paths</a></li>
+ <li><a href="Modifying-Points.html#index-clear-412"><code>clear</code></a>: <a href="Modifying-Points.html#Modifying-Points">Modifying Points</a></li>
+ <li><a href="Modifying-Pictures.html#index-clear-319"><code>clear</code></a>: <a href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="Clearing-Shapes.html#index-clear-250"><code>clear</code></a>: <a href="Clearing-Shapes.html#Clearing-Shapes">Clearing Shapes</a></li>
+ <li><a href="Color-Constructors-and-Setting-Functions.html#index-Color-170"><code>Color</code></a>: <a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-convert_002deps-129"><code>convert-eps</code></a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Converting-EPS-Files-ELISP.html#index-convert_002deps_002dloop-130"><code>convert-eps-loop</code></a>: <a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="Returning-Points-for-Rectangles.html#index-corner-683"><code>corner</code></a>: <a href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a></li>
+ <li><a href="Dynamic-Allocation-of-Shapes.html#index-create_005fnew-151"><code>create_new</code></a>: <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a></li>
+ <li><a href="Circle-Constructors-and-Setting-Functions.html#index-create_005fnew_003cCircle_003e-764"><code>create_new&lt;Circle&gt;</code></a>: <a href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="Color-Constructors-and-Setting-Functions.html#index-create_005fnew_003cColor_003e-176"><code>create_new&lt;Color&gt;</code></a>: <a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="Cuboid-Constructors-and-Setting-Functions.html#index-create_005fnew_003cCuboid_003e-847"><code>create_new&lt;Cuboid&gt;</code></a>: <a href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="Ellipse-Constructors-and-Setting-Functions.html#index-create_005fnew_003cEllipse_003e-718"><code>create_new&lt;Ellipse&gt;</code></a>: <a href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="Path-Constructors-and-Setting-Functions.html#index-create_005fnew_003cPath_003e-551"><code>create_new&lt;Path&gt;</code></a>: <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="Point-Constructors-and-Setting-Functions.html#index-create_005fnew_003cPoint_003e-380"><code>create_new&lt;Point&gt;</code></a>: <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="Rectangle-Constructors-and-Setting-Functions.html#index-create_005fnew_003cRectangle_003e-680"><code>create_new&lt;Rectangle&gt;</code></a>: <a href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="Regular-Polygon-Constructors-and-Setting-Functions.html#index-create_005fnew_003cReg_005fPolygon_003e-661"><code>create_new&lt;Reg_Polygon&gt;</code></a>: <a href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="Solid-Constructors-and-Setting-Functions.html#index-create_005fnew_003cSolid_003e-791"><code>create_new&lt;Solid&gt;</code></a>: <a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a></li>
+ <li><a href="Vector-Operations.html#index-cross_005fproduct-428"><code>cross_product</code></a>: <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a></li>
+ <li><a href="Cuboid-Constructors-and-Setting-Functions.html#index-Cuboid-844"><code>Cuboid</code></a>: <a href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="Defining-and-Initializing-Colors.html#index-define_005fcolor_005fmp-195"><code>define_color_mp</code></a>: <a href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a></li>
+ <li><a href="Performing-Transformations-on-Ellipses.html#index-do_005ftransform-720"><code>do_transform</code></a>: <a href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a></li>
+ <li><a href="Dodecahedron-Constructors-and-Setting-Functions.html#index-Dodecahedron-867"><code>Dodecahedron</code></a>: <a href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a></li>
+ <li><a href="Vector-Operations.html#index-dot_005fproduct-427"><code>dot_product</code></a>: <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a></li>
+ <li><a href="Labeling-Ellipses.html#index-dotlabel-724"><code>dotlabel</code></a>: <a href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a></li>
+ <li><a href="Labelling-Paths.html#index-dotlabel-604"><code>dotlabel</code></a>: <a href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a></li>
+ <li><a href="Labelling-Points.html#index-dotlabel-459"><code>dotlabel</code></a>: <a href="Labelling-Points.html#Labelling-Points">Labelling Points</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-draw-828"><code>draw</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-draw-585"><code>draw</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-draw-448"><code>draw</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-draw_005faxes-591"><code>draw_axes</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-draw_005fhelp-587"><code>draw_help</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-draw_005fhelp-453"><code>draw_help</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Circles-for-Regular-Polygons.html#index-draw_005fin_005fcircle-666"><code>draw_in_circle</code></a>: <a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="Ellipses-for-Rectangles.html#index-draw_005fin_005fellipse-691"><code>draw_in_ellipse</code></a>: <a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="Rectangles-for-Ellipses.html#index-draw_005fin_005frectangle-758"><code>draw_in_rectangle</code></a>: <a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="Icosahedron-Net.html#index-draw_005fnet-877"><code>draw_net</code></a>: <a href="Icosahedron-Net.html#Icosahedron-Net">Icosahedron Net</a></li>
+ <li><a href="Dodecahedron-Net.html#index-draw_005fnet-870"><code>draw_net</code></a>: <a href="Dodecahedron-Net.html#Dodecahedron-Net">Dodecahedron Net</a></li>
+ <li><a href="Tetrahedron-Net.html#index-draw_005fnet-863"><code>draw_net</code></a>: <a href="Tetrahedron-Net.html#Tetrahedron-Net">Tetrahedron Net</a></li>
+ <li><a href="Circles-for-Regular-Polygons.html#index-draw_005fout_005fcircle-669"><code>draw_out_circle</code></a>: <a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="Ellipses-for-Rectangles.html#index-draw_005fout_005fellipse-690"><code>draw_out_ellipse</code></a>: <a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="Rectangles-for-Ellipses.html#index-draw_005fout_005frectangle-757"><code>draw_out_rectangle</code></a>: <a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-drawarrow-589"><code>drawarrow</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-drawarrow-455"><code>drawarrow</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-drawdot-444"><code>drawdot</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Ellipse-Constructors-and-Setting-Functions.html#index-Ellipse-715"><code>Ellipse</code></a>: <a href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="I_002fO-Functions.html#index-endfig-231"><code>endfig</code></a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Epicycloids.html#index-epicycloid_005fpattern_005f1-773"><code>epicycloid_pattern_1</code></a>: <a href="Epicycloids.html#Epicycloids">Epicycloids</a></li>
+ <li><a href="Returning-Information-for-Points.html#index-epsilon-410"><code>epsilon</code></a>: <a href="Returning-Information-for-Points.html#Returning-Information-for-Points">Returning Information for Points</a></li>
+ <li><a href="Returning-Information-for-Transforms.html#index-epsilon-280"><code>epsilon</code></a>: <a href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Returning Information for Transforms</a></li>
+ <li><a href="Outputting-Solids.html#index-extract-822"><code>extract</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-extract-626"><code>extract</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-extract-467"><code>extract</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-extract-254"><code>extract</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-fill-829"><code>fill</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-fill-593"><code>fill</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-filldraw-830"><code>filldraw</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-filldraw-595"><code>filldraw</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Focus-Constructors-and-Setting-Functions.html#index-Focus-483"><code>Focus</code></a>: <a href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fall_005fcoords-404"><code>get_all_coords</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005faxis_005fh-746"><code>get_axis_h</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Rectangles.html#index-get_005faxis_005fh-685"><code>get_axis_h</code></a>: <a href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005faxis_005fv-744"><code>get_axis_v</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Rectangles.html#index-get_005faxis_005fv-686"><code>get_axis_v</code></a>: <a href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="Querying-Colors.html#index-get_005fblue_005fpart-192"><code>get_blue_part</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Returning-Elements-and-Information-Solids.html#index-get_005fcenter-799"><code>get_center</code></a>: <a href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005fcenter-738"><code>get_center</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Polygons.html#index-get_005fcenter-639"><code>get_center</code></a>: <a href="Querying-Polygons.html#Querying-Polygons">Querying Polygons</a></li>
+ <li><a href="Getting-Shape-Centers-Solids.html#index-get_005fcircle_005fcenter-801"><code>get_circle_center</code></a>: <a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005fcircle_005fptr-806"><code>get_circle_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Solving-Ellipses.html#index-get_005fcoefficients-754"><code>get_coefficients</code></a>: <a href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-get_005fcoefficients-698"><code>get_coefficients</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fcoord-405"><code>get_coord</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Copying-Solids.html#index-get_005fcopy-796"><code>get_copy</code></a>: <a href="Copying-Solids.html#Copying-Solids">Copying Solids</a></li>
+ <li><a href="Copying-Paths.html#index-get_005fcopy-561"><code>get_copy</code></a>: <a href="Copying-Paths.html#Copying-Paths">Copying Paths</a></li>
+ <li><a href="Copying-Points.html#index-get_005fcopy-398"><code>get_copy</code></a>: <a href="Copying-Points.html#Copying-Points">Copying Points</a></li>
+ <li><a href="Copying-Labels.html#index-get_005fcopy-299"><code>get_copy</code></a>: <a href="Copying-Labels.html#Copying-Labels">Copying Labels</a></li>
+ <li><a href="Copying-Shapes.html#index-get_005fcopy-242"><code>get_copy</code></a>: <a href="Copying-Shapes.html#Copying-Shapes">Copying Shapes</a></li>
+ <li><a href="Querying-Circles.html#index-get_005fdiameter-770"><code>get_diameter</code></a>: <a href="Querying-Circles.html#Querying-Circles">Querying Circles</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fdirection-491"><code>get_direction</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Planes-Returning-Information.html#index-get_005fdistance-519"><code>get_distance</code></a>: <a href="Planes-Returning-Information.html#Planes-Returning-Information">Planes Returning Information</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fdistance-492"><code>get_distance</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Transforms.html#index-get_005felement-279"><code>get_element</code></a>: <a href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a></li>
+ <li><a href="Getting-Shape-Centers-Solids.html#index-get_005fellipse_005fcenter-802"><code>get_ellipse_center</code></a>: <a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005fellipse_005fptr-807"><code>get_ellipse_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Endianness.html#index-get_005fendianness-153"><code>get_endianness</code></a>: <a href="Endianness.html#Endianness">Endianness</a></li>
+ <li><a href="Outputting-Solids.html#index-get_005fextremes-824"><code>get_extremes</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-get_005fextremes-628"><code>get_extremes</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-get_005fextremes-469"><code>get_extremes</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-get_005fextremes-259"><code>get_extremes</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005ffocus-740"><code>get_focus</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Colors.html#index-get_005fgreen_005fpart-191"><code>get_green_part</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Querying-Paths.html#index-get_005flast_005fpoint-617"><code>get_last_point</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fline-619"><code>get_line</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Points-and-Lines.html#index-get_005fline-433"><code>get_line</code></a>: <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fline_005fswitch-613"><code>get_line_switch</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005flinear_005feccentricity-742"><code>get_linear_eccentricity</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Outputting-Solids.html#index-get_005fmaximum_005fz-826"><code>get_maximum_z</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-get_005fmaximum_005fz-631"><code>get_maximum_z</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-get_005fmaximum_005fz-471"><code>get_maximum_z</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-get_005fmaximum_005fz-257"><code>get_maximum_z</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Outputting-Solids.html#index-get_005fmean_005fz-827"><code>get_mean_z</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-get_005fmean_005fz-630"><code>get_mean_z</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-get_005fmean_005fz-472"><code>get_mean_z</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-get_005fmean_005fz-258"><code>get_mean_z</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Outputting-Solids.html#index-get_005fminimum_005fz-825"><code>get_minimum_z</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-get_005fminimum_005fz-629"><code>get_minimum_z</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-get_005fminimum_005fz-470"><code>get_minimum_z</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-get_005fminimum_005fz-256"><code>get_minimum_z</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Querying-Colors.html#index-get_005fname-194"><code>get_name</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Truncated-Octahedron-Net.html#index-get_005fnet-885"><code>get_net</code></a>: <a href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net">Truncated Octahedron Net</a></li>
+ <li><a href="Icosahedron-Net.html#index-get_005fnet-876"><code>get_net</code></a>: <a href="Icosahedron-Net.html#Icosahedron-Net">Icosahedron Net</a></li>
+ <li><a href="Dodecahedron-Net.html#index-get_005fnet-869"><code>get_net</code></a>: <a href="Dodecahedron-Net.html#Dodecahedron-Net">Dodecahedron Net</a></li>
+ <li><a href="Tetrahedron-Net.html#index-get_005fnet-862"><code>get_net</code></a>: <a href="Tetrahedron-Net.html#Tetrahedron-Net">Tetrahedron Net</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fnormal-620"><code>get_normal</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-get_005fnumerical_005feccentricity-743"><code>get_numerical_eccentricity</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Get-Path.html#index-get_005fpath-506"><code>get_path</code></a>: <a href="Get-Path.html#Get-Path">Get Path</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005fpath_005fptr-808"><code>get_path_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fpersp-496"><code>get_persp</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fpersp_005felement-497"><code>get_persp_element</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fplane-621"><code>get_plane</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fpoint-616"><code>get_point</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fposition-490"><code>get_position</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Circles.html#index-get_005fradius-769"><code>get_radius</code></a>: <a href="Querying-Circles.html#Querying-Circles">Querying Circles</a></li>
+ <li><a href="Querying-Regular-Polygons.html#index-get_005fradius-664"><code>get_radius</code></a>: <a href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">Querying Regular Polygons</a></li>
+ <li><a href="Getting-Shape-Centers-Solids.html#index-get_005frectangle_005fcenter-803"><code>get_rectangle_center</code></a>: <a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005frectangle_005fptr-809"><code>get_rectangle_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Querying-Colors.html#index-get_005fred_005fpart-190"><code>get_red_part</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Getting-Shape-Centers-Solids.html#index-get_005freg_005fpolygon_005fcenter-804"><code>get_reg_polygon_center</code></a>: <a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005freg_005fpolygon_005fptr-810"><code>get_reg_polygon_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Register-Width.html#index-get_005fregister_005fwidth-156"><code>get_register_width</code></a>: <a href="Register-Width.html#Register-Width">Register Width</a></li>
+ <li><a href="Get-Second-Largest-Real.html#index-get_005fsecond_005flargest-159"><code>get_second_largest</code></a>: <a href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">Get Second Largest Real</a></li>
+ <li><a href="Getting-Shape-Centers-Solids.html#index-get_005fshape_005fcenter-800"><code>get_shape_center</code></a>: <a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="Getting-Shapes-Solids.html#index-get_005fshape_005fptr-805"><code>get_shape_ptr</code></a>: <a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="Querying-Paths.html#index-get_005fsize-618"><code>get_size</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005ftransform-494"><code>get_transform</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Points.html#index-get_005ftransform-400"><code>get_transform</code></a>: <a href="Querying-Points.html#Querying-Points">Querying Points</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005ftransform_005felement-495"><code>get_transform_element</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Focuses.html#index-get_005fup-493"><code>get_up</code></a>: <a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="Querying-Colors.html#index-get_005fuse_005fname-193"><code>get_use_name</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fw-409"><code>get_w</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fx-406"><code>get_x</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fy-407"><code>get_y</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Returning-Coordinates.html#index-get_005fz-408"><code>get_z</code></a>: <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Segments.html#index-half-705"><code>half</code></a>: <a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="Plane-Tesselations.html#index-hex_005fpattern_005f1-772"><code>hex_pattern_1</code></a>: <a href="Plane-Tesselations.html#Plane-Tesselations">Plane Tesselations</a></li>
+ <li><a href="Icosahedron-Constructors-and-Setting-Functions.html#index-Icosahedron-874"><code>Icosahedron</code></a>: <a href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a></li>
+ <li><a href="Circles-for-Regular-Polygons.html#index-in_005fcircle-665"><code>in_circle</code></a>: <a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="Ellipses-for-Rectangles.html#index-in_005fellipse-689"><code>in_ellipse</code></a>: <a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="Rectangles-for-Ellipses.html#index-in_005frectangle-756"><code>in_rectangle</code></a>: <a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="Defining-and-Initializing-Colors.html#index-initialize_005fcolors-196"><code>initialize_colors</code></a>: <a href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a></li>
+ <li><a href="I_002fO-Functions.html#index-initialize_005fio-226"><code>initialize_io</code></a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Plane-Intersections.html#index-intersection_005fline-523"><code>intersection_line</code></a>: <a href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a></li>
+ <li><a href="Path-Intersections.html#index-intersection_005fpoint-635"><code>intersection_point</code></a>: <a href="Path-Intersections.html#Path-Intersections">Path Intersections</a></li>
+ <li><a href="Plane-Intersections.html#index-intersection_005fpoint-521"><code>intersection_point</code></a>: <a href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a></li>
+ <li><a href="Point-Intersections.html#index-intersection_005fpoint-439"><code>intersection_point</code></a>: <a href="Point-Intersections.html#Point-Intersections">Point Intersections</a></li>
+ <li><a href="Circle-Intersections.html#index-intersection_005fpoints-771"><code>intersection_points</code></a>: <a href="Circle-Intersections.html#Circle-Intersections">Circle Intersections</a></li>
+ <li><a href="Ellipse-Intersections.html#index-intersection_005fpoints-750"><code>intersection_points</code></a>: <a href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Intersections</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Intersections.html#index-intersection_005fpoints-702"><code>intersection_points</code></a>: <a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a></li>
+ <li><a href="Polygon-Intersections.html#index-intersection_005fpoints-650"><code>intersection_points</code></a>: <a href="Polygon-Intersections.html#Polygon-Intersections">Polygon Intersections</a></li>
+ <li><a href="Matrix-Inversion.html#index-inverse-275"><code>inverse</code></a>: <a href="Matrix-Inversion.html#Matrix-Inversion">Matrix Inversion</a></li>
+ <li><a href="Register-Width.html#index-is_005f32_005fbit-157"><code>is_32_bit</code></a>: <a href="Register-Width.html#Register-Width">Register Width</a></li>
+ <li><a href="Register-Width.html#index-is_005f64_005fbit-158"><code>is_64_bit</code></a>: <a href="Register-Width.html#Register-Width">Register Width</a></li>
+ <li><a href="Endianness.html#index-is_005fbig_005fendian-154"><code>is_big_endian</code></a>: <a href="Endianness.html#Endianness">Endianness</a></li>
+ <li><a href="Querying-Circles.html#index-is_005fcircular-768"><code>is_circular</code></a>: <a href="Querying-Circles.html#Querying-Circles">Querying Circles</a></li>
+ <li><a href="Querying-Ellipses.html#index-is_005fcubic-736"><code>is_cubic</code></a>: <a href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-is_005fcubic-696"><code>is_cubic</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Querying-Paths.html#index-is_005fcycle-611"><code>is_cycle</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Ellipses.html#index-is_005felliptical-734"><code>is_elliptical</code></a>: <a href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="Querying-Points.html#index-is_005fidentity-399"><code>is_identity</code></a>: <a href="Querying-Points.html#Querying-Points">Querying Points</a></li>
+ <li><a href="Querying-Transforms.html#index-is_005fidentity-278"><code>is_identity</code></a>: <a href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a></li>
+ <li><a href="Querying-Points.html#index-is_005fin_005ftriangle-403"><code>is_in_triangle</code></a>: <a href="Querying-Points.html#Querying-Points">Querying Points</a></li>
+ <li><a href="Querying-Paths.html#index-is_005flinear-610"><code>is_linear</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Endianness.html#index-is_005flittle_005fendian-155"><code>is_little_endian</code></a>: <a href="Endianness.html#Endianness">Endianness</a></li>
+ <li><a href="Querying-Solids.html#index-is_005fon_005ffree_005fstore-798"><code>is_on_free_store</code></a>: <a href="Querying-Solids.html#Querying-Solids">Querying Solids</a></li>
+ <li><a href="Querying-Paths.html#index-is_005fon_005ffree_005fstore-608"><code>is_on_free_store</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Points.html#index-is_005fon_005ffree_005fstore-401"><code>is_on_free_store</code></a>: <a href="Querying-Points.html#Querying-Points">Querying Points</a></li>
+ <li><a href="Querying-Shapes.html#index-is_005fon_005ffree_005fstore-251"><code>is_on_free_store</code></a>: <a href="Querying-Shapes.html#Querying-Shapes">Querying Shapes</a></li>
+ <li><a href="Querying-Colors.html#index-is_005fon_005ffree_005fstore-189"><code>is_on_free_store</code></a>: <a href="Querying-Colors.html#Querying-Colors">Querying Colors</a></li>
+ <li><a href="Points-and-Lines.html#index-is_005fon_005fline-437"><code>is_on_line</code></a>: <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="Querying-Points.html#index-is_005fon_005fplane-402"><code>is_on_plane</code></a>: <a href="Querying-Points.html#Querying-Points">Querying Points</a></li>
+ <li><a href="Points-and-Lines.html#index-is_005fon_005fsegment-435"><code>is_on_segment</code></a>: <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="Querying-Paths.html#index-is_005fplanar-609"><code>is_planar</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Ellipses.html#index-is_005fquadratic-735"><code>is_quadratic</code></a>: <a href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-is_005fquadratic-695"><code>is_quadratic</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Querying-Ellipses.html#index-is_005fquartic-737"><code>is_quartic</code></a>: <a href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-is_005fquartic-697"><code>is_quartic</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Querying-Rectangles.html#index-is_005frectangular-687"><code>is_rectangular</code></a>: <a href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="Modifying-Pictures.html#index-kill_005flabels-322"><code>kill_labels</code></a>: <a href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="Labeling-Ellipses.html#index-label-723"><code>label</code></a>: <a href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a></li>
+ <li><a href="Labelling-Paths.html#index-label-602"><code>label</code></a>: <a href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a></li>
+ <li><a href="Labelling-Points.html#index-label-457"><code>label</code></a>: <a href="Labelling-Points.html#Labelling-Points">Labelling Points</a></li>
+ <li><a href="Line-Constructors.html#index-Line-503"><code>Line</code></a>: <a href="Line-Constructors.html#Line-Constructors">Line Constructors</a></li>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#index-location-748"><code>location</code></a>: <a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-location-700"><code>location</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Vector-Operations.html#index-magnitude-429"><code>magnitude</code></a>: <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a></li>
+ <li><a href="Points-and-Lines.html#index-mediate-438"><code>mediate</code></a>: <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="Returning-Points-for-Rectangles.html#index-mid_005fpoint-684"><code>mid_point</code></a>: <a href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a></li>
+ <li><a href="Modifying-Colors.html#index-modify-184"><code>modify</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Planes-Operators.html#index-operator_0021_003d-518"><code>operator!=</code></a>: <a href="Planes-Operators.html#Planes-Operators">Planes Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_0021_003d-397"><code>operator!=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Color-Operators.html#index-operator_0021_003d-180"><code>operator!=</code></a>: <a href="Color-Operators.html#Color-Operators">Color Operators</a></li>
+ <li><a href="Path-Operators.html#index-operator_0026-558"><code>operator&amp;</code></a>: <a href="Path-Operators.html#Path-Operators">Path Operators</a></li>
+ <li><a href="Path-Operators.html#index-operator_0026_003d-557"><code>operator&amp;=</code></a>: <a href="Path-Operators.html#Path-Operators">Path Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002a-390"><code>operator*</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Transform-Operators.html#index-operator_002a-272"><code>operator*</code></a>: <a href="Transform-Operators.html#Transform-Operators">Transform Operators</a></li>
+ <li><a href="Solid-Operators.html#index-operator_002a_003d-795"><code>operator*=</code></a>: <a href="Solid-Operators.html#Solid-Operators">Solid Operators</a></li>
+ <li><a href="Ellipse-Operators.html#index-operator_002a_003d-722"><code>operator*=</code></a>: <a href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a></li>
+ <li><a href="Polygon-Operators.html#index-operator_002a_003d-638"><code>operator*=</code></a>: <a href="Polygon-Operators.html#Polygon-Operators">Polygon Operators</a></li>
+ <li><a href="Path-Operators.html#index-operator_002a_003d-554"><code>operator*=</code></a>: <a href="Path-Operators.html#Path-Operators">Path Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002a_003d-384"><code>operator*=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Picture-Operators.html#index-operator_002a_003d-313"><code>operator*=</code></a>: <a href="Picture-Operators.html#Picture-Operators">Picture Operators</a></li>
+ <li><a href="Transform-Operators.html#index-operator_002a_003d-271"><code>operator*=</code></a>: <a href="Transform-Operators.html#Transform-Operators">Transform Operators</a></li>
+ <li><a href="Shape-Operators.html#index-operator_002a_003d-241"><code>operator*=</code></a>: <a href="Shape-Operators.html#Shape-Operators">Shape Operators</a></li>
+ <li><a href="Path-Operators.html#index-operator_002b-556"><code>operator+</code></a>: <a href="Path-Operators.html#Path-Operators">Path Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002b-385"><code>operator+</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Path-Operators.html#index-operator_002b_003d-555"><code>operator+=</code></a>: <a href="Path-Operators.html#Path-Operators">Path Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002b_003d-386"><code>operator+=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Picture-Operators.html#index-operator_002b_003d-310"><code>operator+=</code></a>: <a href="Picture-Operators.html#Picture-Operators">Picture Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002d-387"><code>operator-</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002d_003d-388"><code>operator-=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002f-394"><code>operator/</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_002f_003d-393"><code>operator/=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Outputting-Points.html#index-operator_003c_003c-463"><code>operator&lt;&lt;</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Color-Operators.html#index-operator_003c_003c-181"><code>operator&lt;&lt;</code></a>: <a href="Color-Operators.html#Color-Operators">Color Operators</a></li>
+ <li><a href="Cuboid-Operators.html#index-operator_003d-850"><code>operator=</code></a>: <a href="Cuboid-Operators.html#Cuboid-Operators">Cuboid Operators</a></li>
+ <li><a href="Solid-Operators.html#index-operator_003d-794"><code>operator=</code></a>: <a href="Solid-Operators.html#Solid-Operators">Solid Operators</a></li>
+ <li><a href="Circle-Operators.html#index-operator_003d-766"><code>operator=</code></a>: <a href="Circle-Operators.html#Circle-Operators">Circle Operators</a></li>
+ <li><a href="Ellipse-Operators.html#index-operator_003d-721"><code>operator=</code></a>: <a href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a></li>
+ <li><a href="Rectangle-Operators.html#index-operator_003d-682"><code>operator=</code></a>: <a href="Rectangle-Operators.html#Rectangle-Operators">Rectangle Operators</a></li>
+ <li><a href="Regular-Polygon-Operators.html#index-operator_003d-663"><code>operator=</code></a>: <a href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">Regular Polygon Operators</a></li>
+ <li><a href="Planes-Operators.html#index-operator_003d-516"><code>operator=</code></a>: <a href="Planes-Operators.html#Planes-Operators">Planes Operators</a></li>
+ <li><a href="Line-Operators.html#index-operator_003d-505"><code>operator=</code></a>: <a href="Line-Operators.html#Line-Operators">Line Operators</a></li>
+ <li><a href="Focus-Operators.html#index-operator_003d-488"><code>operator=</code></a>: <a href="Focus-Operators.html#Focus-Operators">Focus Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_003d-383"><code>operator=</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Picture-Operators.html#index-operator_003d-309"><code>operator=</code></a>: <a href="Picture-Operators.html#Picture-Operators">Picture Operators</a></li>
+ <li><a href="Transform-Operators.html#index-operator_003d-270"><code>operator=</code></a>: <a href="Transform-Operators.html#Transform-Operators">Transform Operators</a></li>
+ <li><a href="Color-Operators.html#index-operator_003d-178"><code>operator=</code></a>: <a href="Color-Operators.html#Color-Operators">Color Operators</a></li>
+ <li><a href="Setting-and-Assigning-to-Points.html#index-operator_003d-_0028for-Points_0029-31"><code>operator= (for Points)</code></a>: <a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="Planes-Operators.html#index-operator_003d_003d-517"><code>operator==</code></a>: <a href="Planes-Operators.html#Planes-Operators">Planes Operators</a></li>
+ <li><a href="Point-Operators.html#index-operator_003d_003d-395"><code>operator==</code></a>: <a href="Point-Operators.html#Point-Operators">Point Operators</a></li>
+ <li><a href="Color-Operators.html#index-operator_003d_003d-179"><code>operator==</code></a>: <a href="Color-Operators.html#Color-Operators">Color Operators</a></li>
+ <li><a href="Circles-for-Regular-Polygons.html#index-out_005fcircle-668"><code>out_circle</code></a>: <a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="Ellipses-for-Rectangles.html#index-out_005fellipse-688"><code>out_ellipse</code></a>: <a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="Rectangles-for-Ellipses.html#index-out_005frectangle-755"><code>out_rectangle</code></a>: <a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="Outputting-Solids.html#index-output-819"><code>output</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-output-634"><code>output</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-output-464"><code>output</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Picture-Output-Functions.html#index-output-335"><code>output</code></a>: <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="Outputting-Labels.html#index-output-300"><code>output</code></a>: <a href="Outputting-Labels.html#Outputting-Labels">Outputting Labels</a></li>
+ <li><a href="Outputting-Shapes.html#index-output-253"><code>output</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Path-Constructors-and-Setting-Functions.html#index-Path-543"><code>Path</code></a>: <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="Perspective-Functions.html#index-persp_005f0-889"><code>persp_0</code></a>: <a href="Perspective-Functions.html#Perspective-Functions">Perspective Functions</a></li>
+ <li><a href="Picture-Constructors.html#index-Picture-307"><code>Picture</code></a>: <a href="Picture-Constructors.html#Picture-Constructors">Picture Constructors</a></li>
+ <li><a href="Planes-Constructors.html#index-Plane-513"><code>Plane</code></a>: <a href="Planes-Constructors.html#Planes-Constructors">Planes Constructors</a></li>
+ <li><a href="Point-Constructors-and-Setting-Functions.html#index-Point-375"><code>Point</code></a>: <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="Intersections.html#index-Point_003a_003aintersection_005fpoints-96"><code>Point::intersection_points</code></a>: <a href="Intersections.html#Intersections">Intersections</a></li>
+ <li><a href="Setting-and-Assigning-to-Points.html#index-Point_003a_003aoperator_003d-30"><code>Point::operator=</code></a>: <a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="Setting-and-Assigning-to-Points.html#index-Point_003a_003aset-32"><code>Point::set</code></a>: <a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="Outputting-Paths.html#index-project-625"><code>project</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Projecting-Points.html#index-project-425"><code>project</code></a>: <a href="Projecting-Points.html#Projecting-Points">Projecting Points</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Segments.html#index-quarter-706"><code>quarter</code></a>: <a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="Typedefs-and-Utility-Structures.html#index-real_005ftriple-134"><code>real_triple</code></a>: <a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="Rectangle-Constructors-and-Setting-Functions.html#index-Rectangle-675"><code>Rectangle</code></a>: <a href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="Regular-Polygon-Constructors-and-Setting-Functions.html#index-Reg_005fPolygon-658"><code>Reg_Polygon</code></a>: <a href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="Resetting-Transforms.html#index-reset-291"><code>reset</code></a>: <a href="Resetting-Transforms.html#Resetting-Transforms">Resetting Transforms</a></li>
+ <li><a href="Modifying-Focuses.html#index-reset_005fangle-489"><code>reset_angle</code></a>: <a href="Modifying-Focuses.html#Modifying-Focuses">Modifying Focuses</a></li>
+ <li><a href="Modifying-Points.html#index-reset_005ftransform-414"><code>reset_transform</code></a>: <a href="Modifying-Points.html#Modifying-Points">Modifying Points</a></li>
+ <li><a href="Modifying-Pictures.html#index-reset_005ftransform-320"><code>reset_transform</code></a>: <a href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="Querying-Paths.html#index-reverse-623"><code>reverse</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Affine-Transformations-for-Solids.html#index-rotate-816"><code>rotate</code></a>: <a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="Affine-Transformations-for-Ellipses.html#index-rotate-725"><code>rotate</code></a>: <a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="Affine-Transformations-for-Polygons.html#index-rotate-641"><code>rotate</code></a>: <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="Affine-Transformations-for-Paths.html#index-rotate-572"><code>rotate</code></a>: <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="Affine-Transformations-for-Points.html#index-rotate-415"><code>rotate</code></a>: <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="Affine-Transformations-for-Pictures.html#index-rotate-317"><code>rotate</code></a>: <a href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="Affine-Transformations-for-Transforms.html#index-rotate-287"><code>rotate</code></a>: <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="Affine-Transformations-for-Shapes.html#index-rotate-244"><code>rotate</code></a>: <a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="Affine-Transformations-for-Solids.html#index-scale-812"><code>scale</code></a>: <a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="Affine-Transformations-for-Ellipses.html#index-scale-728"><code>scale</code></a>: <a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="Affine-Transformations-for-Polygons.html#index-scale-644"><code>scale</code></a>: <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="Affine-Transformations-for-Paths.html#index-scale-573"><code>scale</code></a>: <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="Affine-Transformations-for-Points.html#index-scale-418"><code>scale</code></a>: <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="Affine-Transformations-for-Pictures.html#index-scale-314"><code>scale</code></a>: <a href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="Affine-Transformations-for-Transforms.html#index-scale-282"><code>scale</code></a>: <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="Affine-Transformations-for-Shapes.html#index-scale-245"><code>scale</code></a>: <a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="Regular-Closed-Plane-Curve-Segments.html#index-segment-704"><code>segment</code></a>: <a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="Tetrahedron-Constructors-and-Setting-Functions.html#index-set-861"><code>set</code></a>: <a href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a></li>
+ <li><a href="Circle-Constructors-and-Setting-Functions.html#index-set-763"><code>set</code></a>: <a href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="Ellipse-Constructors-and-Setting-Functions.html#index-set-717"><code>set</code></a>: <a href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="Rectangle-Constructors-and-Setting-Functions.html#index-set-677"><code>set</code></a>: <a href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="Regular-Polygon-Constructors-and-Setting-Functions.html#index-set-660"><code>set</code></a>: <a href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="Path-Constructors-and-Setting-Functions.html#index-set-545"><code>set</code></a>: <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="Focus-Constructors-and-Setting-Functions.html#index-set-485"><code>set</code></a>: <a href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a></li>
+ <li><a href="Point-Constructors-and-Setting-Functions.html#index-set-377"><code>set</code></a>: <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="Color-Constructors-and-Setting-Functions.html#index-set-173"><code>set</code></a>: <a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="Setting-and-Assigning-to-Points.html#index-set-_0028for-Points_0029-33"><code>set (for Points)</code></a>: <a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="Modifying-Colors.html#index-set_005fblue_005fpart-187"><code>set_blue_part</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005fconnectors-571"><code>set_connectors</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Querying-Paths.html#index-set_005fcycle-622"><code>set_cycle</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005fdash_005fpattern-569"><code>set_dash_pattern</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005fdraw_005fcolor-565"><code>set_draw_color</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Setting-Values-Transforms.html#index-set_005felement-277"><code>set_element</code></a>: <a href="Setting-Values-Transforms.html#Setting-Values-Transforms">Setting Values Transforms</a></li>
+ <li><a href="Outputting-Solids.html#index-set_005fextremes-823"><code>set_extremes</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-set_005fextremes-627"><code>set_extremes</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-set_005fextremes-468"><code>set_extremes</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-set_005fextremes-255"><code>set_extremes</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005ffill_005fcolor-567"><code>set_fill_color</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005ffill_005fdraw_005fvalue-564"><code>set_fill_draw_value</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Modifying-Colors.html#index-set_005fgreen_005fpart-186"><code>set_green_part</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Modifying-Colors.html#index-set_005fname-182"><code>set_name</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Setting-Solid-Members.html#index-set_005fon_005ffree_005fstore-797"><code>set_on_free_store</code></a>: <a href="Setting-Solid-Members.html#Setting-Solid-Members">Setting Solid Members</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005fon_005ffree_005fstore-563"><code>set_on_free_store</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Modifying-Points.html#index-set_005fon_005ffree_005fstore-411"><code>set_on_free_store</code></a>: <a href="Modifying-Points.html#Modifying-Points">Modifying Points</a></li>
+ <li><a href="Modifying-Shapes.html#index-set_005fon_005ffree_005fstore-243"><code>set_on_free_store</code></a>: <a href="Modifying-Shapes.html#Modifying-Shapes">Modifying Shapes</a></li>
+ <li><a href="Modifying-Paths.html#index-set_005fpen-570"><code>set_pen</code></a>: <a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="Modifying-Colors.html#index-set_005fred_005fpart-185"><code>set_red_part</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Modifying-Pictures.html#index-set_005ftransform-321"><code>set_transform</code></a>: <a href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="Modifying-Colors.html#index-set_005fuse_005fname-183"><code>set_use_name</code></a>: <a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="Affine-Transformations-for-Solids.html#index-shear-813"><code>shear</code></a>: <a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="Affine-Transformations-for-Ellipses.html#index-shear-729"><code>shear</code></a>: <a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="Affine-Transformations-for-Polygons.html#index-shear-645"><code>shear</code></a>: <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="Affine-Transformations-for-Paths.html#index-shear-574"><code>shear</code></a>: <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="Affine-Transformations-for-Points.html#index-shear-419"><code>shear</code></a>: <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="Affine-Transformations-for-Transforms.html#index-shear-283"><code>shear</code></a>: <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="Affine-Transformations-for-Shapes.html#index-shear-246"><code>shear</code></a>: <a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="Affine-Transformations-for-Solids.html#index-shift-814"><code>shift</code></a>: <a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="Affine-Transformations-for-Ellipses.html#index-shift-730"><code>shift</code></a>: <a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="Affine-Transformations-for-Polygons.html#index-shift-646"><code>shift</code></a>: <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="Affine-Transformations-for-Paths.html#index-shift-575"><code>shift</code></a>: <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="Affine-Transformations-for-Points.html#index-shift-420"><code>shift</code></a>: <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="Affine-Transformations-for-Pictures.html#index-shift-315"><code>shift</code></a>: <a href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="Affine-Transformations-for-Transforms.html#index-shift-284"><code>shift</code></a>: <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="Affine-Transformations-for-Shapes.html#index-shift-247"><code>shift</code></a>: <a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="Affine-Transformations-for-Ellipses.html#index-shift_005ftimes-732"><code>shift_times</code></a>: <a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="Affine-Transformations-for-Polygons.html#index-shift_005ftimes-648"><code>shift_times</code></a>: <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="Affine-Transformations-for-Paths.html#index-shift_005ftimes-577"><code>shift_times</code></a>: <a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="Affine-Transformations-for-Points.html#index-shift_005ftimes-422"><code>shift_times</code></a>: <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="Affine-Transformations-for-Transforms.html#index-shift_005ftimes-286"><code>shift_times</code></a>: <a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="Showing-Solids.html#index-show-811"><code>show</code></a>: <a href="Showing-Solids.html#Showing-Solids">Showing Solids</a></li>
+ <li><a href="Showing-Paths.html#index-show-606"><code>show</code></a>: <a href="Showing-Paths.html#Showing-Paths">Showing Paths</a></li>
+ <li><a href="Planes-Showing.html#index-show-524"><code>show</code></a>: <a href="Planes-Showing.html#Planes-Showing">Planes Showing</a></li>
+ <li><a href="Showing.html#index-show-507"><code>show</code></a>: <a href="Showing.html#Showing">Showing</a></li>
+ <li><a href="Showing-Focuses.html#index-show-498"><code>show</code></a>: <a href="Showing-Focuses.html#Showing-Focuses">Showing Focuses</a></li>
+ <li><a href="Showing-Points.html#index-show-461"><code>show</code></a>: <a href="Showing-Points.html#Showing-Points">Showing Points</a></li>
+ <li><a href="Showing-Pictures.html#index-show-323"><code>show</code></a>: <a href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a></li>
+ <li><a href="Showing-Transforms.html#index-show-281"><code>show</code></a>: <a href="Showing-Transforms.html#Showing-Transforms">Showing Transforms</a></li>
+ <li><a href="Showing-Shapes.html#index-show-252"><code>show</code></a>: <a href="Showing-Shapes.html#Showing-Shapes">Showing Shapes</a></li>
+ <li><a href="Showing-Colors.html#index-show-188"><code>show</code></a>: <a href="Showing-Colors.html#Showing-Colors">Showing Colors</a></li>
+ <li><a href="Showing-Paths.html#index-show_005fcolors-607"><code>show_colors</code></a>: <a href="Showing-Paths.html#Showing-Paths">Showing Paths</a></li>
+ <li><a href="Showing-Points.html#index-show_005ftransform-462"><code>show_transform</code></a>: <a href="Showing-Points.html#Showing-Points">Showing Points</a></li>
+ <li><a href="Showing-Pictures.html#index-show_005ftransform-324"><code>show_transform</code></a>: <a href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a></li>
+ <li><a href="Querying-Paths.html#index-size-612"><code>size</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Querying-Paths.html#index-slope-614"><code>slope</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Points-and-Lines.html#index-slope-434"><code>slope</code></a>: <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="Solid-Constructors-and-Setting-Functions.html#index-Solid-789"><code>Solid</code></a>: <a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a></li>
+ <li><a href="Solving-Ellipses.html#index-solve-753"><code>solve</code></a>: <a href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a></li>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#index-solve-699"><code>solve</code></a>: <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="Utility-Functions.html#index-solve_005fquadratic-888"><code>solve_quadratic</code></a>: <a href="Utility-Functions.html#Utility-Functions">Utility Functions</a></li>
+ <li><a href="Querying-Paths.html#index-subpath-615"><code>subpath</code></a>: <a href="Querying-Paths.html#Querying-Paths">Querying Paths</a></li>
+ <li><a href="Picture-Output-Functions.html#index-suppress_005flabels-337"><code>suppress_labels</code></a>: <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="Outputting-Solids.html#index-suppress_005foutput-820"><code>suppress_output</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-suppress_005foutput-632"><code>suppress_output</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Points.html#index-suppress_005foutput-465"><code>suppress_output</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="Outputting-Shapes.html#index-suppress_005foutput-260"><code>suppress_output</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Tetrahedron-Constructors-and-Setting-Functions.html#index-Tetrahedron-859"><code>Tetrahedron</code></a>: <a href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a></li>
+ <li><a href="Transform-Constructors.html#index-Transform-267"><code>Transform</code></a>: <a href="Transform-Constructors.html#Transform-Constructors">Transform Constructors</a></li>
+ <li><a href="Utility-Functions.html#index-trunc-886"><code>trunc</code></a>: <a href="Utility-Functions.html#Utility-Functions">Utility Functions</a></li>
+ <li><a href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#index-Trunc_005fOctahedron-883"><code>Trunc_Octahedron</code></a>: <a href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-undraw-831"><code>undraw</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-undraw-597"><code>undraw</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-undraw-450"><code>undraw</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Point-Drawing-Functions.html#index-undrawdot-446"><code>undrawdot</code></a>: <a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-unfill-832"><code>unfill</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-unfill-599"><code>unfill</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Drawing-and-Filling-Solids.html#index-unfilldraw-833"><code>unfilldraw</code></a>: <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="Drawing-and-Filling-Paths.html#index-unfilldraw-600"><code>unfilldraw</code></a>: <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="Vector-Operations.html#index-unit_005fvector-431"><code>unit_vector</code></a>: <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a></li>
+ <li><a href="Picture-Output-Functions.html#index-unsuppress_005flabels-338"><code>unsuppress_labels</code></a>: <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="Outputting-Solids.html#index-unsuppress_005foutput-821"><code>unsuppress_output</code></a>: <a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="Outputting-Paths.html#index-unsuppress_005foutput-633"><code>unsuppress_output</code></a>: <a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="Outputting-Shapes.html#index-unsuppress_005foutput-261"><code>unsuppress_output</code></a>: <a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="Outputting-Points.html#index-void-466"><code>void</code></a>: <a href="Outputting-Points.html#Outputting-Points">Outputting Points</a></li>
+ <li><a href="I_002fO-Functions.html#index-write_005ffooters-227"><code>write_footers</code></a>: <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="Cuboid-Constructors-and-Setting-Functions.html#index-g_t_007eCuboid-849"><code>~Cuboid</code></a>: <a href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="Path-Destructor.html#index-g_t_007ePath-553"><code>~Path</code></a>: <a href="Path-Destructor.html#Path-Destructor">Path Destructor</a></li>
+ <li><a href="Point-Destructor.html#index-g_t_007ePoint-382"><code>~Point</code></a>: <a href="Point-Destructor.html#Point-Destructor">Point Destructor</a></li>
+ <li><a href="Solid-Destructor.html#index-g_t_007eSolid-793"><code>~Solid</code></a>: <a href="Solid-Destructor.html#Solid-Destructor">Solid Destructor</a></li>
+    </ul><!-- concidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Future-Plans.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Future-Plans.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Future-Plans.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Future Plans - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Adding-a-File.html#Adding-a-File" title="Adding a File">
+ <link rel="next" href="Changes.html#Changes" title="Changes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Future-Plans"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Changes.html#Changes">Changes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Adding-a-File.html#Adding-a-File">Adding a File</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">40 Future Plans</h2>
+ 
+ <p>3DLDF is a work-in-progress.  In fact, it can never be
+ finished, because the supply of interesting geometric constructions
+ is inexhaustible.  However, presently 3DLDF still has a number of major
+ gaps.
+ 
+    <p>If you're interesting in contributing to 3DLDF, with respect to one of
+ the topics below and in the following sections, or if you have ideas
+ of your own, see <a href="Contributing-to-3DLDF.html#Contributing-to-3DLDF">Contributing to 3DLDF</a>.
+ 
+      <ul>
+ <li>Input routine. 
+ The lack of one is the most significant
+ defect in 3DLDF, as mentioned in <a href="No-Input-Routine.html#No-Input-Routine">No Input Routine</a>.
+ 
+      <li>Port to other platforms. 
+ See <a href="Ports.html#Ports">Ports</a>. 
+ </ul>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Geometry.html#Geometry">Geometry</a>
+ <li><a accesskey="2" href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a>
+ <li><a accesskey="3" href="Shadows.html#Shadows">Shadows</a>
+ <li><a accesskey="4" href="Multi_002dThreading.html#Multi_002dThreading">Multi-Threading</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/GNU-Free-Documentation-License.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/GNU-Free-Documentation-License.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/GNU-Free-Documentation-License.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/GNU-Free-Documentation-License.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,531 ----
+ <html lang="en">
+ <head>
+ <title>GNU Free Documentation License - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Bibliography.html#Bibliography" title="Bibliography">
+ <link rel="next" href="Data-Type-and-Variable-Index.html#Data-Type-and-Variable-Index" title="Data Type and Variable Index">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="GNU-Free-Documentation-License"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Data-Type-and-Variable-Index.html#Data-Type-and-Variable-Index">Data Type and Variable Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Bibliography.html#Bibliography">Bibliography</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="appendix">Appendix A GNU Free Documentation License</h2>
+ 
+ <!-- The GNU Free Documentation License. -->
+ <div align="center">Version 1.3, 3 November 2008</div>
+ 
+ <!-- This file is intended to be included within another document, -->
+ <!-- hence no sectioning command or @node. -->
+ <pre class="display">     Copyright &copy; 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+      <a href="http://fsf.org/">http://fsf.org/</a>
+      
+      Everyone is permitted to copy and distribute verbatim copies
+      of this license document, but changing it is not allowed.
+ </pre>
+      <ol type=1 start=0>
+ <li>PREAMBLE
+ 
+      <p>The purpose of this License is to make a manual, textbook, or other
+ functional and useful document <dfn>free</dfn> in the sense of freedom: to
+ assure everyone the effective freedom to copy and redistribute it,
+ with or without modifying it, either commercially or noncommercially. 
+ Secondarily, this License preserves for the author and publisher a way
+ to get credit for their work, while not being considered responsible
+ for modifications made by others.
+ 
+      <p>This License is a kind of &ldquo;copyleft&rdquo;, which means that derivative
+ works of the document must themselves be free in the same sense.  It
+ complements the GNU General Public License, which is a copyleft
+ license designed for free software.
+ 
+      <p>We have designed this License in order to use it for manuals for free
+ software, because free software needs free documentation: a free
+ program should come with manuals providing the same freedoms that the
+ software does.  But this License is not limited to software manuals;
+ it can be used for any textual work, regardless of subject matter or
+ whether it is published as a printed book.  We recommend this License
+ principally for works whose purpose is instruction or reference.
+ 
+      <li>APPLICABILITY AND DEFINITIONS
+ 
+      <p>This License applies to any manual or other work, in any medium, that
+ contains a notice placed by the copyright holder saying it can be
+ distributed under the terms of this License.  Such a notice grants a
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+ refers to any such manual or work.  Any member of the public is a
+ licensee, and is addressed as &ldquo;you&rdquo;.  You accept the license if you
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+ 
+      <p>A &ldquo;Modified Version&rdquo; of the Document means any work containing the
+ Document or a portion of it, either copied verbatim, or with
+ modifications and/or translated into another language.
+ 
+      <p>A &ldquo;Secondary Section&rdquo; is a named appendix or a front-matter section
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+      <p>The &ldquo;Invariant Sections&rdquo; are certain Secondary Sections whose titles
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+ 
+      <p>The &ldquo;Cover Texts&rdquo; are certain short passages of text that are listed,
+ as Front-Cover Texts or Back-Cover Texts, in the notice that says that
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+ be at most 5 words, and a Back-Cover Text may be at most 25 words.
+ 
+      <p>A &ldquo;Transparent&rdquo; copy of the Document means a machine-readable copy,
+ represented in a format whose specification is available to the
+ general public, that is suitable for revising the document
+ straightforwardly with generic text editors or (for images composed of
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+ for automatic translation to a variety of formats suitable for input
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+ format whose markup, or absence of markup, has been arranged to thwart
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+ An image format is not Transparent if used for any substantial amount
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+ 
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+ format, <acronym>SGML</acronym> or <acronym>XML</acronym> using a publicly available
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+ <acronym>XML</acronym> for which the <acronym>DTD</acronym> and/or processing tools are
+ not generally available, and the machine-generated <acronym>HTML</acronym>,
+ PostScript or <acronym>PDF</acronym> produced by some word processors for
+ output purposes only.
+ 
+      <p>The &ldquo;Title Page&rdquo; means, for a printed book, the title page itself,
+ plus such following pages as are needed to hold, legibly, the material
+ this License requires to appear in the title page.  For works in
+ formats which do not have any title page as such, &ldquo;Title Page&rdquo; means
+ the text near the most prominent appearance of the work's title,
+ preceding the beginning of the body of the text.
+ 
+      <p>The &ldquo;publisher&rdquo; means any person or entity that distributes copies
+ of the Document to the public.
+ 
+      <p>A section &ldquo;Entitled XYZ&rdquo; means a named subunit of the Document whose
+ title either is precisely XYZ or contains XYZ in parentheses following
+ text that translates XYZ in another language.  (Here XYZ stands for a
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+ &ldquo;Dedications&rdquo;, &ldquo;Endorsements&rdquo;, or &ldquo;History&rdquo;.)  To &ldquo;Preserve the Title&rdquo;
+ of such a section when you modify the Document means that it remains a
+ section &ldquo;Entitled XYZ&rdquo; according to this definition.
+ 
+      <p>The Document may include Warranty Disclaimers next to the notice which
+ states that this License applies to the Document.  These Warranty
+ Disclaimers are considered to be included by reference in this
+ License, but only as regards disclaiming warranties: any other
+ implication that these Warranty Disclaimers may have is void and has
+ no effect on the meaning of this License.
+ 
+      <li>VERBATIM COPYING
+ 
+      <p>You may copy and distribute the Document in any medium, either
+ commercially or noncommercially, provided that this License, the
+ copyright notices, and the license notice saying this License applies
+ to the Document are reproduced in all copies, and that you add no other
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+ compensation in exchange for copies.  If you distribute a large enough
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+ 
+      <p>You may also lend copies, under the same conditions stated above, and
+ you may publicly display copies.
+ 
+      <li>COPYING IN QUANTITY
+ 
+      <p>If you publish printed copies (or copies in media that commonly have
+ printed covers) of the Document, numbering more than 100, and the
+ Document's license notice requires Cover Texts, you must enclose the
+ copies in covers that carry, clearly and legibly, all these Cover
+ Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+ the back cover.  Both covers must also clearly and legibly identify
+ you as the publisher of these copies.  The front cover must present
+ the full title with all words of the title equally prominent and
+ visible.  You may add other material on the covers in addition. 
+ Copying with changes limited to the covers, as long as they preserve
+ the title of the Document and satisfy these conditions, can be treated
+ as verbatim copying in other respects.
+ 
+      <p>If the required texts for either cover are too voluminous to fit
+ legibly, you should put the first ones listed (as many as fit
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+ pages.
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+      <p>If you publish or distribute Opaque copies of the Document numbering
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+ copy along with each Opaque copy, or state in or with each Opaque copy
+ a computer-network location from which the general network-using
+ public has access to download using public-standard network protocols
+ a complete Transparent copy of the Document, free of added material. 
+ If you use the latter option, you must take reasonably prudent steps,
+ when you begin distribution of Opaque copies in quantity, to ensure
+ that this Transparent copy will remain thus accessible at the stated
+ location until at least one year after the last time you distribute an
+ Opaque copy (directly or through your agents or retailers) of that
+ edition to the public.
+ 
+      <p>It is requested, but not required, that you contact the authors of the
+ Document well before redistributing any large number of copies, to give
+ them a chance to provide you with an updated version of the Document.
+ 
+      <li>MODIFICATIONS
+ 
+      <p>You may copy and distribute a Modified Version of the Document under
+ the conditions of sections 2 and 3 above, provided that you release
+ the Modified Version under precisely this License, with the Modified
+ Version filling the role of the Document, thus licensing distribution
+ and modification of the Modified Version to whoever possesses a copy
+ of it.  In addition, you must do these things in the Modified Version:
+ 
+           <ol type=A start=1>
+ <li>Use in the Title Page (and on the covers, if any) a title distinct
+ from that of the Document, and from those of previous versions
+ (which should, if there were any, be listed in the History section
+ of the Document).  You may use the same title as a previous version
+ if the original publisher of that version gives permission.
+ 
+           <li>List on the Title Page, as authors, one or more persons or entities
+ responsible for authorship of the modifications in the Modified
+ Version, together with at least five of the principal authors of the
+ Document (all of its principal authors, if it has fewer than five),
+ unless they release you from this requirement.
+ 
+           <li>State on the Title page the name of the publisher of the
+ Modified Version, as the publisher.
+ 
+           <li>Preserve all the copyright notices of the Document.
+ 
+           <li>Add an appropriate copyright notice for your modifications
+ adjacent to the other copyright notices.
+ 
+           <li>Include, immediately after the copyright notices, a license notice
+ giving the public permission to use the Modified Version under the
+ terms of this License, in the form shown in the Addendum below.
+ 
+           <li>Preserve in that license notice the full lists of Invariant Sections
+ and required Cover Texts given in the Document's license notice.
+ 
+           <li>Include an unaltered copy of this License.
+ 
+           <li>Preserve the section Entitled &ldquo;History&rdquo;, Preserve its Title, and add
+ to it an item stating at least the title, year, new authors, and
+ publisher of the Modified Version as given on the Title Page.  If
+ there is no section Entitled &ldquo;History&rdquo; in the Document, create one
+ stating the title, year, authors, and publisher of the Document as
+ given on its Title Page, then add an item describing the Modified
+ Version as stated in the previous sentence.
+ 
+           <li>Preserve the network location, if any, given in the Document for
+ public access to a Transparent copy of the Document, and likewise
+ the network locations given in the Document for previous versions
+ it was based on.  These may be placed in the &ldquo;History&rdquo; section. 
+ You may omit a network location for a work that was published at
+ least four years before the Document itself, or if the original
+ publisher of the version it refers to gives permission.
+ 
+           <li>For any section Entitled &ldquo;Acknowledgements&rdquo; or &ldquo;Dedications&rdquo;, Preserve
+ the Title of the section, and preserve in the section all the
+ substance and tone of each of the contributor acknowledgements and/or
+ dedications given therein.
+ 
+           <li>Preserve all the Invariant Sections of the Document,
+ unaltered in their text and in their titles.  Section numbers
+ or the equivalent are not considered part of the section titles.
+ 
+           <li>Delete any section Entitled &ldquo;Endorsements&rdquo;.  Such a section
+ may not be included in the Modified Version.
+ 
+           <li>Do not retitle any existing section to be Entitled &ldquo;Endorsements&rdquo; or
+ to conflict in title with any Invariant Section.
+ 
+           <li>Preserve any Warranty Disclaimers.
+           </ol>
+ 
+      <p>If the Modified Version includes new front-matter sections or
+ appendices that qualify as Secondary Sections and contain no material
+ copied from the Document, you may at your option designate some or all
+ of these sections as invariant.  To do this, add their titles to the
+ list of Invariant Sections in the Modified Version's license notice. 
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+ in part, as part of another Document.
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+      <p>An MMC is &ldquo;eligible for relicensing&rdquo; if it is licensed under this
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+ 
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+        Permission is granted to copy, distribute and/or modify this document
+        under the terms of the GNU Free Documentation License, Version 1.3
+        or any later version published by the Free Software Foundation;
+        with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+        Texts.  A copy of the license is included in the section entitled ``GNU
+        Free Documentation License''.
+ </pre>
+    <p>If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+ replace the &ldquo;with<small class="dots">...</small>Texts.&rdquo; line with this:
+ 
+ <pre class="smallexample">         with the Invariant Sections being <var>list their titles</var>, with
+          the Front-Cover Texts being <var>list</var>, and with the Back-Cover Texts
+          being <var>list</var>.
+ </pre>
+    <p>If you have Invariant Sections without Cover Texts, or some other
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+    <p>If your document contains nontrivial examples of program code, we
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+ to permit their use in free software.
+ 
+ <!-- Local Variables: -->
+ <!-- ispell-local-pdict: "ispell-dict" -->
+ <!-- End: -->
+ <!-- The Data Type Index is merged with the Variable Index, because the -->
+ <!-- former has so few entries. -->
+ <!-- "@syncodeindex tp vr" appears after "@c %**end of header", above. -->
+ <!-- LDF 2003.09.01. -->
+ <!-- varidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Geometry.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Geometry.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Geometry.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Geometry - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="prev" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="next" href="Curves-and-Surfaces.html#Curves-and-Surfaces" title="Curves and Surfaces">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Geometry"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Future-Plans.html#Future-Plans">Future Plans</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Future-Plans.html#Future-Plans">Future Plans</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">40.1 Geometry</h3>
+ 
+ <p>3DLDF currently provides a set of basic plane and solid geometrical
+ figures.  However, some important ones are still missing. 
+ There are many useful geometrical data types and functions whose
+ implementation would require no more than elementary geometry.
+ 
+      <ul>
+ <li>Add constructors with a normal vector argument rather than angles of
+ rotation about the main axes.
+ 
+      <li>I have started defining <code>class Triangle</code>, which can be used for
+ calculating triangle solutions.
+ 
+      <li><a name="index-multiple-inheritance-890"></a><a name="index-derived-classes-891"></a><a name="index-derivation-892"></a>Add a class <code>Conic_Section</code> and derive <code>Ellipse</code>
+ from it.  This will be the first case of
+ <dfn>multiple inheritance</dfn><a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ in 3DLDF, since <code>Ellipse</code> is already
+ derived from <code>Path</code>.  See <a href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>. 
+ Add the classes <code>Parabola</code> and <code>Hyperbola</code>.
+ 
+      <li>Add more functions for finding the intersections of objects of various
+ types, starting with the plane figures. 
+ In particular, I believe I've found an algebraic solution for
+ the intersection of an <code>Ellipse</code> and a <code>Circle</code> in a plane,
+ but I haven't had a chance to try implementing it yet.
+ 
+      <p>If this works, I think it will make it possible to find the intersection
+ of two coplanar ellipses algebraically, because it will be possible to
+ transform them both such that one of them becomes circular.
+ 
+      <li>Class <code>Octahedron</code> will complete the set of regular Platonic
+ polyhedra.
+ 
+      <li>Add classes for the Kepler-Poinsot polyhedra, the semi-regular
+ Archimedean polyhedra,  the dual solids, the stellated Archimedean
+ polyhedra, and the regular compounds.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+      <li>Add class <code>Ellipsoid</code> and a derived class <code>Sphere</code>.
+ 
+      <li>Improve the specification of <code>Solid</code> and
+ <code>Solid_Faced</code>. 
+ In particular, it would help to store the vertices of
+ <code>Polyhedra</code> as individual <code>Points</code>, rather
+ than using <code>Reg_Polygons</code>.  I'd also
+ like to find a better way of generating <code>Solids</code>, without using
+ rotations, if possible.
+ 
+    </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>,
+ &amp;sect;15.2
+ &ldquo;Multiple Inheritance&rdquo;, pp.&nbsp;<!-- /@w -->390&ndash;92.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Cundy and Rollet, <cite>Mathematical Models</cite>, Chapter 3,
+ &ldquo;Polyhedra&rdquo;, pp. 76&ndash;160.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Get-Path.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Get-Path.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Get-Path.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Get Path - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Line-Operators.html#Line-Operators" title="Line Operators">
+ <link rel="next" href="Showing.html#Showing" title="Showing">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Get-Path"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing.html#Showing">Showing</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Operators.html#Line-Operators">Line Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.5 Get Path</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>get_path</b> (<var>void</var>)<var><a name="index-get_005fpath-506"></a></var><br>
+ <blockquote><p>Returns a linear <code>Path</code> with two <code>Points</code>
+ on the <code>Line</code>.  The first <code>Point</code> will be <code>position</code>, and
+ the second will be <code>position + direction</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Get-Second-Largest-Real.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Get-Second-Largest-Real.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Get-Second-Largest-Real.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Get Second Largest Real - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="System-Information.html#System-Information" title="System Information">
+ <link rel="prev" href="Register-Width.html#Register-Width" title="Register Width">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Get-Second-Largest-Real"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Register-Width.html#Register-Width">Register Width</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="System-Information.html#System-Information">System Information</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">15.3 Get Second Largest Real</h3>
+ 
+ <div class="defun">
+ &mdash; Template function: template &lt;class Real&gt; Real <b>get_second_largest</b> (<var>Real MAX_VAL, </var>[<var>bool verbose = </var><code>false</code>])<var><a name="index-get_005fsecond_005flargest-159"></a></var><br>
+ &mdash; Template specialization: float <b>get_second_largest</b> (<var>float, bool</var>)<var><a name="index-get_005fsecond_005flargest-160"></a></var><br>
+ &mdash; Template specialization: double <b>get_second_largest</b> (<var>double, bool</var>)<var><a name="index-get_005fsecond_005flargest-161"></a></var><br>
+ <blockquote><p><code>get_second_largest</code> returns the second largest floating point
+ number of the type specified the template paramater <var>Real</var>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output.
+ 
+         <p>This function is used for setting the value of <code>MAX_REAL</code>. 
+ See <a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a>.
+ 
+         <p><code>get_second_largest</code> depends on there
+ being an unsigned integer type with the same length as <var>Real</var>. 
+ This should always be the case for <code>float</code> and <code>double</code>, but
+ may not be <code>long double</code>.
+ 
+         <p><var>MAX_VAL</var> should be the largest number of type <var>Real</var> on a given
+ architecture.  The GNU C++
+  compiler GCC 3.3 does not currently supply
+ the <code>numeric_limits</code> template, so it is necessary to pass
+ one of the macros <code>FLT_MAX</code> or <code>DBL_MAX</code> explicitly, depending
+ on which specialization you use<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>. 
+ When and if GCC supplies the <code>numeric_limits</code> template, I will
+ eliminate the <var>MAX_REAL</var> argument. 
+ </p></blockquote></div>
+ 
+ <!-- color.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> If your system supplies an unsigned integer type with the same
+ length as <code>long double</code>, then you can instantiate
+ <code>get_second_largest&lt;long double&gt;()</code> and call
+ &lsquo;<samp><span class="samp">get_second_largest&lt;long double&gt;(LDBL_MAX)</span></samp>&rsquo;.  However, I doubt
+ that this amount of precision would be worthwhile.  If it ever were
+ required, 3DLDF would have to be changed in other ways, too.  In
+ particular, it would have to use more precise trigonometric functions
+ for rotations.  See <a href="Accuracy.html#Accuracy">Accuracy</a>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Getting-Shape-Centers-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Getting-Shape-Centers-Solids.html
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+ <html lang="en">
+ <head>
+ <title>Getting Shape Centers Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids" title="Returning Elements and Information Solids">
+ <link rel="prev" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids" title="Returning Elements and Information Solids">
+ <link rel="next" href="Getting-Shapes-Solids.html#Getting-Shapes-Solids" title="Getting Shapes Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Getting-Shape-Centers-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <hr>
+ </div>
+ 
+ <h4 class="unnumberedsubsec">Getting Shape Centers</h4>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: const Point&amp; <b>get_shape_center</b> (<var>const unsigned short shape_type, const unsigned short s</var>)<var><a name="index-get_005fshape_005fcenter-800"></a></var><br>
+ <blockquote><p>Returns the <code>center</code> of a <code>Shape</code> belonging to the <code>Solid</code>. 
+ Currently, the object can be a <code>Circle</code>, <code>Ellipse</code>,
+ <code>Rectangle</code>, or <code>Reg_Polygon</code>, and it is accessed through a pointer
+ on one of the following vectors of pointers to <code>Shape</code>:
+ <code>circles</code>, <code>ellipses</code>,
+ <code>rectangles</code>, or <code>reg_polygons</code>. 
+ The type of
+ object is specified
+ using the <var>shape_type</var> argument. 
+ The following <code>public static const</code> data members of <code>Solid</code>
+ can (and probably should) be passed as the <var>shape_type</var> argument:
+ <code>CIRCLE</code>, <code>ELLIPSE</code>, <code>RECTANGLE</code>, and
+ <code>REG_POLYGON</code>.
+ 
+         <p>The argument <var>s</var> is used to index the vector.
+ 
+         <p>This function is called within the more specialized functions in this
+ section, namely: <code>get_circle_center()</code>,
+ <code>get_ellipse_center()</code>, <code>get_rectangle_center()</code>, and
+ <code>get_reg_polygon_center()</code>.  I don't expect it to be needed in user
+ code very often.
+ 
+      <pre class="example">          Dodecahedron d(origin, 3);
+           d.filldraw();
+           Point C = d.get_shape_center(Solid::REG_POLYGON, 1);
+           C.dotlabel("C");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF182.png"
+ alt="[Figure 182. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 182. 
+ <br>
+ </p>
+ 
+      <!-- !! NOTE.  LDF 2003.08.15. -->
+         <p>Note that this function will have to be changed, if new vectors of
+ <code>Shape</code> pointers are added to <code>class Solid</code>! 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: const Point&amp; <b>get_circle_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fcircle_005fcenter-801"></a></var><br>
+ &mdash; : const Point&amp; <b>get_ellipse_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fellipse_005fcenter-802"></a></var><br>
+ &mdash; : const Point&amp; <b>get_rectangle_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005frectangle_005fcenter-803"></a></var><br>
+ &mdash; : const Point&amp; <b>get_reg_polygon_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005freg_005fpolygon_005fcenter-804"></a></var><br>
+ <blockquote><p>These functions all return the center of the <code>Shape</code> pointed to by a pointer on
+ one of the vectors of <code>Shapes</code> belonging to the <code>Solid</code>.  The argument <var>s</var>
+ indicates which element on the vector is to be accessed.  For example,
+ <code>get_rectangle_center(2)</code> returns the center of the
+ <code>Rectangle</code> pointed to by <code>rectangles[2]</code>.
+ 
+      <pre class="example">          Cuboid c(origin, 3, 4, 5, 0, 30);
+           c.draw();
+           for (int i = 0; i &lt; 6; ++i)
+             c.get_rectangle_center(i).label(i, "");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF183.png"
+ alt="[Figure 183. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 183. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Getting-Shapes-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Getting-Shapes-Solids.html
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+ <html lang="en">
+ <head>
+ <title>Getting Shapes Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids" title="Returning Elements and Information Solids">
+ <link rel="prev" href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids" title="Getting Shape Centers Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Getting-Shapes-Solids"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <hr>
+ </div>
+ 
+ <h4 class="unnumberedsubsec">Getting Shapes</h4>
+ 
+ <p>The functions in this section
+ all return <code>const</code> pointers to <code>Shape</code>, or one of its derived
+ classes. Therefore, they must be invoked in such a way, that
+ the <code>const</code> qualifier is not discarded.  See
+ the description of <code>get_reg_polygon_ptr()</code> below, for an example.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_shape_ptr</b> (<var>const unsigned short shape_type, const unsigned short s</var>)<var><a name="index-get_005fshape_005fptr-805"></a></var><br>
+ <blockquote><p>Copies one of the objects belonging to the <code>Solid</code>, and returns a
+ pointer to <code>Shape</code> that points to the copy. 
+ The object is found by dereferencing one of the pointers on one of the
+ vectors of pointers belonging to the <code>Solid</code>. 
+ Currently, these
+ vectors are <code>circles</code>, <code>ellipses</code>, <code>paths</code>,
+ <code>rectangles</code>, and <code>reg_polygons</code>.  The argument
+ <var>shape_type</var> specifies the vector, and the
+ argument <var>s</var> specifies which element of the vector should be
+ accessed.  The following <code>public static const</code> data members of
+ <code>Solid</code> can (and probably should) be passed as the <var>shape_type</var>
+ argument: <code>CIRCLE</code>, <code>ELLIPSE</code>, <code>PATH</code>, <code>RECTANGLE</code>,
+ and <code>REG_POLYGON</code>.
+ 
+         <p>This function was originally intended to be called within the more
+ specialized functions in this
+ section, namely: <code>get_circle_ptr()</code>, <code>get_ellipse_ptr()</code>,
+ <code>get_path_ptr()</code>, <code>get_rectangle_ptr</code>, and <code>get_reg_polygon_ptr</code>. 
+ However, these functions no longer use <code>get_shape_ptr()</code>, so this
+ function is probably no longer needed.
+ 
+      <pre class="example">          Icosahedron I(origin, 3);
+           I.filldraw();
+           Reg_Polygon* t =
+           static_cast&lt;Reg_Polygon*&gt;(I.get_shape_ptr(Solid::REG_POLYGON, 9));
+           t-&gt;fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF184.png"
+ alt="[Figure 184. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 184. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: const Reg_Polygon* <b>get_circle_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fcircle_005fptr-806"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_ellipse_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fellipse_005fptr-807"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_path_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fpath_005fptr-808"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_rectangle_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005frectangle_005fptr-809"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_reg_polygon_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005freg_005fpolygon_005fptr-810"></a></var><br>
+ <blockquote><p>Each of these functions returns a pointer from one of the vectors of
+ <code>Shape</code> pointers belonging to the <code>Solid</code>.  The argument <var>s</var>
+ specifies which element of the appropriate vector should be returned. 
+ For example, <code>get_reg_polygon_ptr(2)</code> returns the <code>Reg_Polygon*</code>
+ in <code>reg_polygons[2]</code>.
+ 
+         <p>Since these functions return <code>const</code> pointers, they must be invoked
+ in such a way, that the <code>const</code> qualifier is not discarded, as
+ noted at the beginning of this section.  The following example
+ demonstrates two ways of invoking <code>get_reg_polygon_ptr()</code>:
+ 
+      <pre class="example">          Dodecahedron d(origin, 3);
+           d.draw();
+           const Reg_Polygon* ptr = d.get_reg_polygon_ptr(0);
+           ptr-&gt;draw(black, "evenly scaled 4", "pencircle scaled 1mm");
+           Reg_Polygon A = *d.get_reg_polygon_ptr(5);
+           A.fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF185.png"
+ alt="[Figure 185. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 185. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Global-Constants-and-Variables.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Global-Constants-and-Variables.html
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+ <html lang="en">
+ <head>
+ <title>Global Constants and Variables - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures" title="Typedefs and Utility Structures">
+ <link rel="next" href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes" title="Dynamic Allocation of Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Global-Constants-and-Variables"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">13 Global Constants and Variables</h2>
+ 
+ <p>The global constants and variables described in this chapter are
+ found in <samp><span class="file">pspglb.web</span></samp>.  Others, of types
+ defined in 3DLDF, are described in subsequent chapters.
+ 
+ <div class="defun">
+ &mdash; Constants: bool <b>ldf_real_float</b><var><a name="index-ldf_005freal_005ffloat-140"></a></var><br>
+ &mdash; : bool <b>ldf_real_double</b><var><a name="index-ldf_005freal_005fdouble-141"></a></var><br>
+ <blockquote><p>Set to 0 or 1 to match the values of the preprocessor macros
+ <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.  The latter are used
+ for conditional compilation and determine whether <code>real</code> is
+ &ldquo;typedeffed&rdquo; to <code>float</code> or <code>double</code>, i.e., whether
+ <code>real</code> is made to be a synonym of <code>float</code> or <code>double</code>
+ using <code>typedef</code>.
+ 
+         <p><code>ldf_real_float</code> and <code>ldf_real_double</code> can be used to control
+ conditional expressions in non-conditionally compiled code. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>PI</b><var><a name="index-PI-142"></a></var><br>
+ <blockquote><p>The value of <code>PI</code>
+ is calculated as
+ 4.0 * arctan(1.0). 
+ I believe that a preprocessor macro &ldquo;<code>PI</code>&rdquo; was
+ available when I compiled 3DLDF using the DEC C++
+  compiler, and that
+ it wasn't, when I used GNU CC under Linux, but I'm no longer sure. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: valarray &lt;real&gt; <b>null_coordinates</b><var><a name="index-null_005fcoordinates-143"></a></var><br>
+ <blockquote><p>Contains four elements, all 0.  Used for resetting the sets of
+ coordinates belonging to <code>Points</code>, but only when the DEC C++
+ 
+         <p>compiler is used.  This doesn't work when GCC is used. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>INVALID_REAL</b><var><a name="index-INVALID_005fREAL-144"></a></var><br>
+ <blockquote><p>Actually, <code>INVALID_REAL</code> is the largest possible <code>real</code> value
+ (i.e., <code>float</code> or <code>double</code>) on a given machine. 
+ So, from the point of view of the compiler, it's not invalid at all. 
+ However, 3DLDF uses it to indicate failure of some kind.  For example,
+ the return value of a function returning <code>real</code> can be compared
+ with <code>INVALID_REAL</code> to check whether the function succeeded or
+ failed.
+ 
+         <p>An alternative approach would be to use the exception handling
+ facilities of C++
+ .  I do use these, but only in a couple of places,
+ so far. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real_pair <b>INVALID_REAL_PAIR</b><var><a name="index-INVALID_005fREAL_005fPAIR-145"></a></var><br>
+ <blockquote><p><code>first</code> and <code>second</code> are both <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>INVALID_REAL_SHORT</b><var><a name="index-INVALID_005fREAL_005fSHORT-146"></a></var><br>
+ <blockquote><p><code>first</code> is <code>INVALID_REAL</code> and <code>second</code> is 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>MAX_REAL</b><var><a name="index-MAX_005fREAL-147"></a></var><br>
+ <blockquote><p><a name="index-system-dependencies-148"></a>The largest <code>real</code> value permitted in the the elements of
+ <code>Transforms</code> and the coordinates of
+ <code>Points</code>.  It is the second largest <code>real</code> value (i.e.,
+ <code>float</code> or <code>double</code>) on a given machine (<code>INVALID_REAL</code>
+ is the largest).
+ 
+         <p><code>MAX_REAL</code> is a variable, but it should be used like a constant. 
+ In other words, users should never reset its value.  It can't be
+ declared <code>const</code> because its value must be calculated using
+ function calls, which can't be done before the entry point of the
+ program, i.e., <code>main()</code>.  Therefore, the value of <code>MAX_REAL</code>
+ is calculated at the beginning of <code>main()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>MAX_REAL_SQRT</b><var><a name="index-MAX_005fREAL_005fSQRT-149"></a></var><br>
+ <blockquote><p>The square root of <code>MAX_REAL</code>.
+ 
+         <p><code>MAX_REAL_SQRT</code> is a variable, but it should be used like a
+ constant. In other words, users should never reset its value.  It can't
+ be declared <code>const</code> because its value is calculated using the
+ <code>sqrt()</code> function,
+ which can't be done before the entry point of the
+ program, i.e., <code>main()</code>.  Therefore, the value of
+ <code>MAX_REAL_SQRT</code> is set after <code>MAX_REAL</code> is calculated, at the
+ beginning of <code>main()</code>.
+ 
+         <p><code>MAX_REAL_SQRT</code> is used in <code>Point::magnitude()</code>
+ (see <a href="Vector-Operations.html#Vector-Operations">Vector Operations</a>).  The magnitude of a <code>Point</code> is found
+ by using the formula
+ \sqrtx^2 + y^2 + z^2. 
+ x, y, and z are all tested against
+ <code>MAX_REAL_SQRT</code> to ensure that
+ x^2, y^2, and z^2
+ will all be
+ less than or equal to <code>MAX_REAL</code> before trying to calculate them.
+ 
+      <!-- !! TO DO. -->
+         <p>Metafont implements an operation called <dfn>Pythagorean addition</dfn>,
+ notated as &ldquo;<code>++</code>&rdquo;which
+ can be used to calculate distances without first squaring and then
+ taking square roots:<!-- !! GET REF., Metafont the program. -->
+ <a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ a++b == \sqrt(a^2 + b^2)
+ and
+ a++b++c == \sqrt(a^2 + b^2 + c^2). 
+ This makes it possible to calculate distances for greater values of
+ a, b, and c, that would otherwise cause floating point errors. 
+ Metafont also implements the inverse operation
+ <dfn>Pythagorean subtraction</dfn>, notated as &ldquo;<code>+-+</code>&rdquo;:
+ <!-- !! TO DO:   There's an ugly space before ``a+-+b'' in the TeX -->
+ <!-- output.  It probably has to do with finding the best line breaks. -->
+ <!-- There's not much leeway, because of the shortness of the paragraph. -->
+ <!-- That's my interpretation, anyway.  LDF 2003.12.08. -->
+ <!-- It might be worthwhile trying to find out how Knuth did it for _The -->
+ <!-- METAFONTbook_.  LDF 2003.12.08. -->
+ a+-+b == \sqrt(a^2 - b^2). 
+ Unfortunately, 3DLDF implements neither Pythagorean addition
+ nor subtraction as yet, but it's on my
+ <a name="index-TO-DO-150"></a>list of &ldquo;things to do&rdquo;. 
+ </p></blockquote></div>
+ 
+ <!-- creatnew.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Knuth, Donald E. <cite>The Metafontbook</cite>, p. 66.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/I_002fO-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/I_002fO-Functions.html
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--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/I_002fO-Functions.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,92 ----
+ <html lang="en">
+ <head>
+ <title>I/O Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Input-and-Output.html#Input-and-Output" title="Input and Output">
+ <link rel="prev" href="I_002fO-Global-Variables.html#I_002fO-Global-Variables" title="I/O Global Variables">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="I%2fO-Functions"></a>
+ <a name="I_002fO-Functions"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Input-and-Output.html#Input-and-Output">Input and Output</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">17.2 I/O Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>initialize_io</b> (<var>string in_stream_name, string out_stream_name, string tex_stream_name, char* program_name</var>)<var><a name="index-initialize_005fio-226"></a></var><br>
+ <blockquote><p>Opens files with names specified by the first three arguments, and
+ attaches them to the file streams <code>in_stream</code>, <code>out_stream</code>, and
+ <code>tex_stream</code>, respectively.  Comments are written at the beginning
+ of the files, containing their names, a datestamp, and the name of the
+ program used to generate them. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>write_footers</b> (<var>void</var>)<var><a name="index-write_005ffooters-227"></a></var><br>
+ <blockquote><p>Writes code at the end of the files attached to <code>in_stream</code>,
+ <code>out_stream</code>, and <code>tex_stream</code>, before the streams are
+ closed.  Currently, they write comments containing
+ <a name="index-local-variable-lists-228"></a>local variable lists
+ for use in
+ <a name="index-Emacs-229"></a>Emacs. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>beginfig</b> (<var>unsigned short i</var>)<var><a name="index-beginfig-230"></a></var><br>
+ <blockquote><p>Writes &ldquo;<code>beginfig(</code><var>i</var><code>)</code>&rdquo; to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>endfig</b> ([<var>unsigned short i = 0</var>])<var><a name="index-endfig-231"></a></var><br>
+ <blockquote><p>Writes &ldquo;<code>endfig()</code>&rdquo; to <code>out_stream</code>.  The argument <var>i</var>
+ is &ldquo;syntactic sugar&rdquo;;  it's ignored by <code>endfig()</code>,
+ but may help the user keep track of what figure is being ended. 
+ </p></blockquote></div>
+ 
+ <!-- shape.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/I_002fO-Global-Variables.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/I_002fO-Global-Variables.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/I_002fO-Global-Variables.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/I_002fO-Global-Variables.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,83 ----
+ <html lang="en">
+ <head>
+ <title>I/O Global Variables - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Input-and-Output.html#Input-and-Output" title="Input and Output">
+ <link rel="prev" href="Input-and-Output.html#Input-and-Output" title="Input and Output">
+ <link rel="next" href="I_002fO-Functions.html#I_002fO-Functions" title="I/O Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="I%2fO-Global-Variables"></a>
+ <a name="I_002fO-Global-Variables"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Input-and-Output.html#Input-and-Output">Input and Output</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Input-and-Output.html#Input-and-Output">Input and Output</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">17.1 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: ifstream <b>in_stream</b><var><a name="index-in_005fstream-223"></a></var><br>
+ <blockquote><p>Intended for inputting files of input code.  However, 3DLDF does not
+ currently have a routine for reading input code. 
+ <code>in_stream</code> is currently attached to the file <samp><span class="file">ldfinput.ldf</span></samp>
+ by <code>initialize_io()</code> (see <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>). 
+ <code>in_stream</code> is read in character-by-character in <code>main()</code>,
+ however this serves no useful purpose as yet. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: ofstream <b>out_stream</b><var><a name="index-out_005fstream-224"></a></var><br>
+ <blockquote><p>Used for writing the file of MetaPost code, which is 3DLDF's output. 
+ Currently attached to the file <samp><span class="file">subpersp.mp</span></samp> by
+ <code>initialize_io()</code> (see <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: ofstream <b>tex_stream</b><var><a name="index-tex_005fstream-225"></a></var><br>
+ <blockquote><p>TeX code can be written to a file through <code>tex_stream</code>, if
+ desired.  3DLDF makes no use of it itself. 
+ Currently attached to <samp><span class="file">subpersp.tex</span></samp> by
+ <code>initialize_io()</code> (see <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,101 ----
+ <html lang="en">
+ <head>
+ <title>Icosahedron Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Icosahedron.html#Icosahedron" title="Icosahedron">
+ <link rel="prev" href="Icosahedron-Data-Members.html#Icosahedron-Data-Members" title="Icosahedron Data Members">
+ <link rel="next" href="Icosahedron-Net.html#Icosahedron-Net" title="Icosahedron Net">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Icosahedron-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Icosahedron-Net.html#Icosahedron-Net">Icosahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">Icosahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Icosahedron.html#Icosahedron">Icosahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Icosahedron</b> (<code>void</code>)<var><a name="index-Icosahedron-874"></a></var><br>
+ <blockquote><p>Creates an empty <code>Icosahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Icosahedron</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Icosahedron-875"></a></var><br>
+ <blockquote><p>Creates an <code>Icosahedron</code> with its center at the origin, where the
+ triangular faces have enclosing circles of diameter
+ <var>diameter_of_triangle</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Icosahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Icosahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+      <pre class="example">          Icosahedron i(origin, 3, 0, 10);
+           i.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF195.png"
+ alt="[Figure 195. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 195. 
+ <br>
+ </p>
+ 
+      <pre class="example">          i.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF196.png"
+ alt="[Figure 196. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 196. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,73 ----
+ <html lang="en">
+ <head>
+ <title>Icosahedron Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Icosahedron.html#Icosahedron" title="Icosahedron">
+ <link rel="prev" href="Icosahedron.html#Icosahedron" title="Icosahedron">
+ <link rel="next" href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions" title="Icosahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Icosahedron-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Icosahedron.html#Icosahedron">Icosahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Icosahedron.html#Icosahedron">Icosahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-872"></a></var><br>
+ <blockquote><p>The angle between the faces of the <code>Icosahedron</code>, namely
+ 138 degrees
+  11'
+  = \pi - \arcsin(2/3). 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>triangle_radius</b><var><a name="index-triangle_005fradius-873"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a triangular face of
+ the <code>Icosahedron</code>. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Getstart.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Getstart.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Getstart.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,133 ----
+ <html lang="en">
+ <head>
+ <title>Icosahedron Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Getstart.html#Polyhedron-Getstart" title="Polyhedron Getstart">
+ <link rel="prev" href="Dodecahedron-Getstart.html#Dodecahedron-Getstart" title="Dodecahedron Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Icosahedron-Getstart"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">Dodecahedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">8.2.3 Icosahedron</h4>
+ 
+ <p><a name="index-Icosahedron-67"></a>An icosahedron has 20 similar regular triangular faces. 
+ The following examples show the same <code>Icosahedron</code> using different
+ projections:
+ 
+ <pre class="example">     default_focus.set(3, 0, -10, 2, 0, 10, 10);
+      Icosahedron i(origin, 3);
+      i.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF45.png"
+ alt="[Figure 45. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 45. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF46.png"
+ alt="[Figure 46. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 46. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF47.png"
+ alt="[Figure 47. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 47. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF48.png"
+ alt="[Figure 48. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 48. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p>In [next figure]
+ , <code>i</code> is filldrawn.  In this case,
+ the surface hiding algorithm has worked properly. 
+ See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF49.png"
+ alt="[Figure 49. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 49. 
+ <br>
+ </p>
+ 
+ <!-- chapter Pictures -->
+ <!-- gspict.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Net.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron-Net.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron-Net.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,115 ----
+ <html lang="en">
+ <head>
+ <title>Icosahedron Net - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Icosahedron.html#Icosahedron" title="Icosahedron">
+ <link rel="prev" href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions" title="Icosahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Icosahedron-Net"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Icosahedron.html#Icosahedron">Icosahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real triangle_diameter, </var>[<var>bool do_half = </var><code>false</code>])<var><a name="index-get_005fnet-876"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn>, i.e., the two-dimensional pattern of triangles
+ that can be folded into a model of an icosahedron.  The net lies
+ in the x-z plane.  The triangles have enclosing circles of diameter
+ <var>triangle_diameter</var>. 
+ If the argument <var>do_half</var> = <code>true</code>, only the first half of the
+ net is created.  This is used in the non-default constructor. 
+ See <a href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Icosahedron; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Icosahedron::get_net(1.5);
+           for (vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+                iter != vrp.end(); ++iter)
+              (**iter).draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF197.png"
+ alt="[Figure 197. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 197. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real triangle_diameter, </var>[<var>bool portrait = true, </var>[<var>bool make_tabs = </var><code>true</code>]])<var><a name="index-draw_005fnet-877"></a></var><br>
+ <blockquote><p>Draws the net for an <code>Icosahedron</code> in the x-z plane.  The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>. 
+ If the argument <var>portrait</var> is <code>true</code> (the default), the net
+ will be arranged for printing in portrait format.  If it's <code>false</code>,
+ it will be arranged for printing in landscape format. 
+ In portrait format, the center of the bottom right triangle is at the
+ origin.  In landscape format, the center of the bottom left
+ triangle is at the origin.  The triangles are numbered.
+ 
+         <p>The argument <var>make_tabs</var> currently has no effect. 
+ When I get around to programming this, it will be used for specifying
+ whether tabs for gluing and/or sewing a cardboard model should be drawn,
+ too.
+ 
+      <pre class="example">          Icosahedron::draw_net(2, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF198.png"
+ alt="[Figure 198. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 198. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Icosahedron.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Icosahedron.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Icosahedron - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link rel="prev" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Icosahedron"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">37.2.3 Icosahedron</h4>
+ 
+ <p><a name="index-Icosahedron-871"></a>Class <code>Icosahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p>Icosahedra have 20 regular triangular faces.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">Icosahedron Data Members</a>
+ <li><a accesskey="2" href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Icosahedron-Net.html#Icosahedron-Net">Icosahedron Net</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Illustrations.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Illustrations.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Illustrations.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Illustrations.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,186 ----
+ <html lang="en">
+ <head>
+ <title>Illustrations - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="About-This-Manual.html#About-This-Manual" title="About This Manual">
+ <link rel="prev" href="Manual-Conventions.html#Manual-Conventions" title="Manual Conventions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Illustrations"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="About-This-Manual.html#About-This-Manual">About This Manual</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">1.2.2 Illustrations</h4>
+ 
+ <p>The illustrations in this manual have been created using 3DLDF.  The
+ code that generates them is in the Texinfo files themselves, that
+ contain the text of the manual.  Texinfo is based on TeX, so it's
+ possible to make use of the latter's facility for writing ASCII text to
+ files using TeX's <code>\write</code> command.
+ 
+    <p>The file <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> contains the
+ C++
+  code, and the file <samp><span class="file">3DLDF-1.1.5.1/CWEB/examples.mp</span></samp>
+ contains the MetaPost code for generating the illustrations. 
+ 3DLDF was built using GCC 2.95 when the illustrations were generated. 
+ For some reason, GCC 3.3 has difficulty with them.  It works to generate
+ them in batches of about 50 with GCC 3.3.
+ 
+    <p><a name="index-PNG-_0028Portable-Network-Graphics_0029-6"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-7"></a><a name="index-PS-_0028PostScript_0029-8"></a><a name="index-PostScript-_0028PS_0029-9"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-10"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-11"></a>MetaPost outputs Encapsulated PostScript files.  These can be included
+ in TeX files, as explained below.  However, in order to display the
+ illustrations in the HTML version of this manual, I had to convert them
+ to <a href="http://www.libpng.org/pub/png/index.html">PNG (&ldquo;Portable Network Graphics&rdquo;) format</a>. 
+ See <a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>, for instructions on how to do this.
+ 
+    <p>Please note that the illustrations cannot be shown in the Info output
+ format!
+ 
+    <p>If you have problems including the illustrations in the printed version,
+ for example, if your
+ installation doesn't have <samp><span class="command">dvips</span></samp>, look for the following lines
+ in <samp><span class="file">3DLDF.texi</span></samp>:
+ 
+ <pre class="example">     \doepsftrue    %% One of these two lines should be commented-out.
+      %\doepsffalse
+ </pre>
+    <p class="noindent">Now, remove the &lsquo;<samp><span class="samp">%</span></samp>&rsquo; from in front of &lsquo;<samp><span class="samp">\doepsffalse</span></samp>&rsquo; and put
+ one in front of &lsquo;<samp><span class="samp">\doepsftrue</span></samp>&rsquo;.  This will prevent the illustrations
+ from being included.  This should only be done as a last resort,
+ however, because it will make it difficult if
+ not impossible to understand this manual.
+ 
+    <p>The C++
+  code in an example is not always the complete code used to
+ create the illustration that follows it, since the latter may be
+ cluttered with commands that would detract from the clarity of the
+ example.  The actual code used always follows the example in the Texinfo
+ source file, so the latter may be referred to, if the reader wishes
+ to see exactly what code was used to generate the illustration.
+ 
+    <p>You may want to skip the following paragraphs in this section, if you're
+ reading this manual for the
+ first time.  Don't worry if you don't understand it, it's meaning should
+ become clear after reading the manual and some experience with
+ using 3DLDF.
+ 
+    <p>The file <samp><span class="file">3DLDF.texi</span></samp> in the directory
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO</span></samp>, the driver file for this manual, contains
+ the following TeX code:
+ 
+ <pre class="example">     \newif\ifmakeexamples
+      \makeexamplestrue     %% One of these two lines should be commented-out.
+      %\makeexamplesfalse
+ </pre>
+    <p class="noindent">When <samp><span class="command">texi2dvi</span></samp> is run on <samp><span class="file">3DLDF.texi</span></samp>,
+ <code>\makeexamplestrue</code> is not commented-out, and
+ <code>\makeexamplesfalse</code> is,
+ the C++
+  code for the illustrations is written to the file
+ <samp><span class="file">examples.web</span></samp>. 
+ If the EPS files don't already exist (in the directory
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/EPS</span></samp>),
+ the TeX macro <code>\PEX</code>,
+ which includes them in the Texinfo files, will signal an error each time
+ it can't find one.  Just type &lsquo;<samp><span class="samp">s</span></samp>&rsquo; at the command line to tell
+ TeX to keep going. 
+ If you want to be sure that these are indeed the only errors, you can
+ type &lsquo;<samp><span class="samp">&lt;RETURN&gt;</span></samp>&rsquo; after each one instead.
+ 
+    <p><samp><span class="command">texi2dvi 3DLDF.texi</span></samp> also generates the file
+ <samp><span class="file">extext.tex</span></samp>, which contains TeX code for including the
+ illustrations by themselves.
+ 
+    <p><samp><span class="file">examples.web</span></samp> must now be moved to <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> and
+ ctangled, <samp><span class="file">examples.c</span></samp> must compiled,
+ and 3DLDF must be relinked.  <samp><span class="command">ctangle examples</span></samp> also generates
+ the header file <samp><span class="file">example.h</span></samp>, which is included
+ in <samp><span class="file">main.web</span></samp>.  Therefore, if the contents of <samp><span class="file">examples.h</span></samp> have
+ changed since the last time <samp><span class="file">main.web</span></samp> was ctangled,
+ <samp><span class="file">main.web</span></samp> will have to be ctangled, and <samp><span class="file">main.c</span></samp> recompiled,
+ before <samp><span class="file">3dldf</span></samp> is relinked.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+    <p>Running <samp><span class="command">3dldf</span></samp> and MetaPost now
+ generates the EPS (Encapsulated PostScript) files
+ <samp><span class="file">3DLDFmp.1</span></samp> through (currently) <samp><span class="file">3DLDFmp.199</span></samp>
+ for the illustrations.  They must be moved to
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/EPS</span></samp>. 
+ Now, when <samp><span class="command">texi2dvi 3DLDF.texi</span></samp> is run again, the
+ <samp><span class="command">dvips</span></samp> command
+ &lsquo;<samp><span class="samp">\epsffile</span></samp>&rsquo; includes the EPS files for the illustrations in the
+ manual.  <samp><span class="file">3DLDF.texi</span></samp> includes the line &lsquo;<samp><span class="samp">\input epsf</span></samp>&rsquo;, so
+ that &lsquo;<samp><span class="samp">\epsffile</span></samp>&rsquo; works. 
+ Of course, <samp><span class="command">dvips</span></samp> (or some other program that does the
+ job) must be used to convert <samp><span class="file">3DLDF.dvi</span></samp> to  a PostScript file. 
+ To see exactly how this is done, take a look at the
+ <samp><span class="file">.texi</span></samp> source files of this manual.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+    <p>In the <samp><span class="file">3DLDF.texi</span></samp> belonging to the 3DLDF distribution,
+ <code>\makeexamplestrue</code> will be commented-out, and
+ <code>makeexamplesfalse</code> won't be, because the EPS files for the
+ illustrations are included in the distribution.
+ 
+    <p>The version of <samp><span class="file">examples.web</span></samp> in <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp> merely
+ includes the files <samp><span class="file">subex1.web</span></samp> and <samp><span class="file">subex2.web</span></samp>. 
+ If you rename <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> to <samp><span class="file">examples.web</span></samp>,
+ you can generate the illustrations.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <samp><span class="command">ctangle</span></samp> creates
+ <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp> from
+ <samp><i>&lt;filename&gt;</i><span class="file">.web</span></samp>,
+ so the compiler must compile the C++
+  files
+ using the <samp><span class="option">-x c++</span></samp> option.  Otherwise, it would handle them as if
+ they contained C code.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> If you want to try generating the illustrations yourself, you
+ can save a little run-time by calling <samp><span class="command">tex 3DLDF.texi</span></samp> the
+ first time, rather than <samp><span class="command">texi2dvi</span></samp>.  The latter program runs
+ TeX twice, because it needs two passes in order to generate the
+ contents, indexing, and cross reference information (and maybe some
+ other things, too).</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Initial-version.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Initial-version.html
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+ <html lang="en">
+ <head>
+ <title>Initial version - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Changes.html#Changes" title="Changes">
+ <link rel="prev" href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4" title="Changes in 3DLDF 1.1.4">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Initial-version"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Changes.html#Changes">Changes</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">41.6 3DLDF 1.1.1</h3>
+ 
+ <p>3DLDF 1.1.1 was the first version of 3DLDF since it became a GNU
+ package (the current version is 1.1.5.1).  It is now conformant
+ to the GNU Coding Standards, except that
+ a functioning <samp><span class="file">3DLDF.info</span></samp> cannot be generated from
+ <samp><span class="file">3DLDF.texi</span></samp>.   The
+ distribution now includes a <code>configure</code> script,
+ <samp><span class="file">Makefile.in</span></samp> files, and other files generated by Autoconf and
+ Automake.  Recompilation is now handled by <samp><span class="command">make</span></samp> rather than
+ the auxilliary program <samp><span class="command">3DLDFcpl</span></samp>.  The files
+ <samp><span class="file">3DLDFcpl.web</span></samp> and <samp><span class="file">3DLDFprc.web</span></samp> have been removed from the
+ distribution.
+ 
+    <p>The extension of the C++
+  files generated by <samp><span class="command">ctangle</span></samp> is
+ changed from <samp><span class="file">c</span></samp> to <samp><span class="file">cxx</span></samp> before they are compiled. 
+ After <samp><span class="command">ctangle</span></samp> is run on a CWEB file, <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp>
+ is compared to the old <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.cxx</span></samp> using <samp><span class="command">diff</span></samp>. 
+ Whitespace, comments, and <code>#line</code> preprocessor commands are
+ ignored.  The <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp> is only renamed to
+ <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.cxx</span></samp> and compiled if they differ.  This way,
+ changes to the TeX text only in a CWEB file no longer cause
+ recompilation and relinking.
+ 
+    <p>The main Texinfo file is now called <samp><span class="file">3DLDF.texi</span></samp>.  It was formerly
+ called <samp><span class="file">3DLDFman.texi</span></samp>.  This is because Automake expects this
+ name.  For this reason, the CWEB
+ file passed as an argument to cweave has been renamed
+ <samp><span class="file">3DLDFprg.web</span></samp>.  It was formerly called <samp><span class="file">3DLDF.web</span></samp>.
+ 
+ <!-- biblio.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Input-and-Output.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Input-and-Output.html
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+ <html lang="en">
+ <head>
+ <title>Input and Output - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="next" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Input-and-Output"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Color-Reference.html#Color-Reference">Color Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">17 Input and Output</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a>
+ <li><a accesskey="2" href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Installing-3DLDF.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Installing-3DLDF.html
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+ <html lang="en">
+ <head>
+ <title>Installing 3DLDF - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF" title="Installing and Running 3DLDF">
+ <link rel="prev" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF" title="Installing and Running 3DLDF">
+ <link rel="next" href="Running-3DLDF.html#Running-3DLDF" title="Running 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Installing-3DLDF"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">11.1 Installing 3DLDF</h3>
+ 
+ <p>3DLDF is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/3dldf">http://ftp.gnu.org/gnu/3dldf</a>. 
+ The official 3DLDF website is
+ <a href="http://www.gnu.org/software/3dldf">http://www.gnu.org/software/3dldf</a>. 
+ The &ldquo;tarball&rdquo;, i.e., the compressed archive file
+ <samp><span class="file">3DLDF-1.1.5.1.tar.gz</span></samp> unpacks into a directory called
+ <samp><span class="file">/3DLDF-1.1.5.1/</span></samp>.
+ 
+    <p>On a typical Unix-like system, entering the following commands
+ at the command line in a shell will unpack the 3DLDF distribution. 
+ Please note that the form of the commands may differ on your system.
+ 
+ <pre class="example">     gunzip 3DLDF-1.1.5.1.tar.gz
+      tar xpvf 3DLDF-1.1.5.1.tar
+ </pre>
+    <p>The &lsquo;<samp><span class="samp">p</span></samp>&rsquo; option to <samp><span class="command">tar</span></samp> ensures that the files will have
+ the same permissions as when they were packed.
+ 
+    <p>The directory <samp><span class="file">3DLDF-1.1.5.1/</span></samp> contains a
+ <samp><span class="command">configure</span></samp> script, which should
+ be called from the command line in the shell, using the absolute path of
+ <samp><span class="file">3DLDF-1.1.5.1/</span></samp> as the prefix argument.  For example, if
+ the path is <samp><span class="file">/usr/local/mydir/3DLDF-1.1.5.1/</span></samp>,
+ <samp><span class="command">configure</span></samp> should be invoked as follows:
+ 
+ <pre class="example">     cd 3DLDF-1.1.5.1
+      configure --prefix=/usr/local/mydir/3DLDF-1.1.5.1/
+ </pre>
+    <p><samp><span class="command">configure</span></samp> generates a <samp><span class="file">Makefile</span></samp>
+ from the <samp><span class="file">Makefile.in</span></samp> in <samp><span class="file">3DLDF-1.1.5.1/</span></samp>, and
+ in each of the subdirectories <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>,
+ <samp><span class="file">3DLDF-1.1.5.1/DOC</span></samp>,
+ and <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO</span></samp>. 
+ Now, <samp><span class="command">make install</span></samp> causes the 3DLDF to be built. 
+ The executable is called <samp><span class="file">3dldf</span></samp>.
+ 
+    <p>See the files <samp><span class="file">README</span></samp> and <samp><span class="file">INSTALL</span></samp> in the 3DLDF distribution
+ for more information.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Template-Functions.html#Template-Functions">Template Functions</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Installing-and-Running-3DLDF.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Installing-and-Running-3DLDF.html
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*** 0 ****
--- 1,61 ----
+ <html lang="en">
+ <head>
+ <title>Installing and Running 3DLDF - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Intersections.html#Intersections" title="Intersections">
+ <link rel="next" href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures" title="Typedefs and Utility Structures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Installing-and-Running-3DLDF"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Intersections.html#Intersections">Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">11 Installing and Running 3DLDF</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Installing-3DLDF.html#Installing-3DLDF">Installing 3DLDF</a>
+ <li><a accesskey="2" href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Intersections.html
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+ <html lang="en">
+ <head>
+ <title>Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Pictures.html#Pictures" title="Pictures">
+ <link rel="next" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF" title="Installing and Running 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Intersections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Pictures.html#Pictures">Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">10 Intersections</h2>
+ 
+ <p><a name="index-intersection-81"></a><a name="index-intersection-points-82"></a><a name="index-Path-intersections-83"></a><a name="index-output-file-84"></a><a name="index-arbitrary-Path-85"></a>There are no functions for finding the intersection points of two (or
+ more) arbitrary <code>Paths</code>.  This is impossible, so long as 3DLDF
+ outputs MetaPost code. 
+ 3DLDF only &ldquo;knows&rdquo; about the <code>Points</code> on a
+ <code>Path</code>;  it doesn't actually generate the curve or other figure
+ that passes through the <code>Points</code>, and consequently doesn't &ldquo;know&rdquo;
+ how it does this.
+ 
+    <p><a name="index-arbitrary-Path-86"></a><a name="index-intersection-87"></a><a name="index-intersection-points-88"></a><a name="index-Path-intersections-89"></a><a name="index-connectors-90"></a><a name="index-Path-connectors-91"></a>In addition, an arbitrary <code>Path</code> can contain connectors. 
+ In 3DLDF, the connectors are
+ merely <code>strings</code> and are written verbatim to the output file,
+ however, in MetaPost they influence the form of a <code>Path</code>.
+ 
+    <p><a name="index-non_002darbitrary-Path-92"></a><a name="index-intersection-93"></a><a name="index-intersection-points-94"></a><a name="index-Path-intersections-95"></a>3DLDF can, however, find the intersection points of some
+ <em>non-arbitrary</em> <code>Paths</code>.  So far, it can find the intersection
+ point of the following combinations of <code>Paths</code>:
+ 
+    <p><a name="index-Point_003a_003aintersection_005fpoints-96"></a>
+      <ol type=1 start=1>
+ <li>Two linear <code>Paths</code>, i.e., <code>Paths</code>
+ for which <code>Path::is_linear()</code> returns <code>true</code>
+ (see <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>). 
+ In addition, the <code>static Point</code> member function
+ <code>Point::intersection_points()</code> can be called with four <code>Point</code>
+ arguments.  The first and second arguments are treated as the end points
+ of one line, and the third and fourth arguments as the end points of the
+ other.
+ 
+      <li>A line and a <code>Polygon</code>.  Currently, <code>Reg_Polygon</code> and
+ <code>Rectangle</code> are the only classes derived from <code>Polygon</code>.
+ 
+      <li>Two <code>Polygons</code>.
+ 
+      <li>A line and a Regular Closed Plane Curve (<code>Reg_Cl_Plane_Curve</code>,
+ see <a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>).  Currently,
+ <code>Ellipse</code> and <code>Circle</code> are the only classes derived from
+ <code>Reg_Cl_Plane_Curve</code>.
+ 
+      <li>Two <code>Ellipses</code>.  Since a <code>Circle</code> is also an <code>Ellipse</code>,
+ one or both of the <code>Ellipses</code> may be a <code>Circle</code>. 
+ See <a href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Reference; Intersections</a>.
+         </ol>
+ 
+    <p>Adding more functions for finding the intersections of various geometric
+ figures is one of my main priorities with respect to extending 3DLDF.
+ 
+    <p>There are currently no special
+ functions for finding the intersection points
+ of a line and a <code>Circle</code> or two <code>Circles</code>.  Since the
+ <code>class Circle</code> is derived from <code>class Ellipse</code>,
+ <code>Circle::intersection_points()</code> resolves to
+ <code>Ellipse::intersection_points()</code>, which, in turn, calls
+ <code>Reg_Cl_Plane_Curve::intersection_points()</code>. 
+ This does the trick, but it's much easier to find the intersections for
+ <code>Circles</code> that it is for <code>Ellipses</code>.  In particular, the
+ intersections of two coplanar <code>Circles</code> can be found
+ algebraically, whereas I've had to implement a numerical solution for
+ the case of two coplanar <code>Ellipses</code> with different centers and/or
+ axis orientation.  It may also be worthwhile to write
+ a specialization for
+ finding the intersection points of a <code>Circle</code> and an
+ <code>Ellipse</code>.
+ 
+    <p><a name="index-intersection-theory-97"></a><a name="index-theory-of-intersection-98"></a><a name="index-future-plans-99"></a><a name="index-contributing-to-3DLDF-100"></a>The theory of intersections is a fascinating and non-trivial branch of
+ mathematics.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ As I learn more about it, I plan to define more
+ <code>classes</code> to represent various curves (two-dimensional ones to
+ start with) and functions for finding their intersection points.
+ 
+ <!-- instlrun.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> The books on computer graphics and the fairly elementary
+ mathematics books that I own or have referred to don't go into
+ intersections very deeply.  One that does is
+ Fischer, Gerd.  <cite>Ebene Algebraische Kurven</cite>, which is a bit over my
+ head.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Introduction.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Introduction.html
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+ <html lang="en">
+ <head>
+ <title>Introduction - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="index.html#Top" title="Top">
+ <link rel="next" href="Contributing-to-3DLDF.html#Contributing-to-3DLDF" title="Contributing to 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Introduction"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Contributing-to-3DLDF.html#Contributing-to-3DLDF">Contributing to 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="index.html#Top">Top</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">1 Introduction</h2>
+ 
+ <p>3DLDF is a free software package for three-dimensional drawing written by
+ Laurence D. Finston, who is also the author of this manual. 
+ It is written in C++
+  using CWEB and it outputs MetaPost code.
+ 
+    <p>3DLDF is a GNU package. 
+ It is part of the GNU Project of the
+ Free Software Foundation
+ and is published under the GNU General Public License. 
+ See the website <a href="http://www.gnu.org">http://www.gnu.org</a> for more
+ information. 
+ 3DLDF is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/3dldf">http://ftp.gnu.org/gnu/3dldf</a>. 
+ The official 3DLDF website is
+ <a href="http://www.gnu.org/software/3dldf">http://www.gnu.org/software/3dldf</a>. 
+ More information about 3DLDF can be found at the author's website:
+ <a href="http://wwwuser.gwdg.de/~lfinsto1">http://wwwuser.gwdg.de/~lfinsto1</a>.
+ 
+    <p>Please send bug reports to:
+ 
+ <pre class="display">     <a href="mailto:bug-3DLDF@gnu.org">bug-3DLDF@gnu.org</a> and
+ </pre>
+    <!-- Not currently listing DANTE as a site for downloading. -->
+ <!-- LDF 2003.11.20. -->
+ <!-- @uref{http://www.dante.de/software/ctan/, the Dante www-server} -->
+    <p>Two other mailing lists may be of interest to users of 3DLDF:
+ <a href="mailto:help-3DLDF@gnu.org">help-3DLDF@gnu.org</a> is for people to ask other
+ users for help and <a href="mailto:info-3DLDF@gnu.org">info-3DLDF@gnu.org</a> is for sending
+ announcements to users.  To subscribe, send an email to the
+ appropriate mailing list or lists with the word "subscribe" as the
+ subject. 
+ The author's website is <a href="http://wwwuser.gwdg.de/~lfinsto1">http://wwwuser.gwdg.de/~lfinsto1</a>.
+ 
+    <p>My primary purpose in writing 3DLDF was to make it possible to use
+ MetaPost for three-dimensional drawing.  I've always enjoyed using MetaPost,
+ and thought it was a shame that I could only use it for making
+ two-dimensional drawings.  3DLDF is a front-end that operates on
+ three-dimensional data, performs the necessary calculations for the
+ projection onto two dimensions, and writes its output in the form of
+ MetaPost code.
+ 
+    <p>While 3DLDF's data types and operations are modelled on those of
+ Metafont and MetaPost, and while the only form of output 3DLDF currently
+ produces is MetaPost code, it is nonetheless not in principle tied to
+ MetaPost.  It could be modified to produce PostScript code directly, or
+ output in other formats.  It would also be possible to modify 3DLDF so
+ that it could be used for creating graphics interactively on a terminal,
+ by means of an appropriate interface to the computer's graphics
+ hardware.
+ 
+    <p>The name  &ldquo;3DLDF&rdquo; (&ldquo;3D&rdquo;  plus the  author's initials)  was
+ chosen because,  while not  pretty, it's  unlikely to conflict
+ with any of the other programs called &ldquo;3D&rdquo;-something.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a>
+ <li><a accesskey="2" href="About-This-Manual.html#About-This-Manual">About This Manual</a>
+ <li><a accesskey="3" href="CWEB-Documentation.html#CWEB-Documentation">CWEB Documentation</a>
+ <li><a accesskey="4" href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a>
+ <li><a accesskey="5" href="Caveats.html#Caveats">Caveats</a>
+ <li><a accesskey="6" href="Ports.html#Ports">Ports</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Inverting-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Inverting-Transforms.html
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+ <html lang="en">
+ <head>
+ <title>Inverting Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforms.html#Transforms" title="Transforms">
+ <link rel="prev" href="Applying-Transforms-to-Points-Intro.html#Applying-Transforms-to-Points-Intro" title="Applying Transforms to Points Intro">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Inverting-Transforms"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Applying-Transforms-to-Points-Intro.html#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforms.html#Transforms">Transforms</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">4.2 Inverting Transforms</h3>
+ 
+ <p><a name="index-matrix-inversion-42"></a><a name="index-inversion-43"></a><dfn>Inversion</dfn> is another operation that can be performed on
+ <code>Transforms</code>.  This makes it possible to reverse the effect of a
+ <code>Transform</code>, which may represent multiple transformations.
+ 
+ <pre class="example">     Point p;
+      Transform t;
+      t.shift(1, 2, 3);
+      t.scale(2, 3, 4);
+      t.rotate(45, 45, 30);
+      t.show("t:");
+      -| t:
+         1.22   0.707    1.41       0
+        0.238    2.59    -1.5       0
+        -3.15    1.45       2       0
+        -7.74    10.2    4.41       1
+      p *= t;
+      p.show("p:");
+      -| p: (-7.74, 10.2, 4.41)
+      Transform u;
+      u = t.inverse();
+      u.show("u:");
+      -| u:
+        0.306  0.0265  -0.197 2.85e-09
+        0.177   0.287  0.0906 -1.12e-09
+        0.354  -0.167   0.125       0
+           -1      -2      -3       1
+      p *= u;
+      p.show("p:");
+      -| p: (0, 0, 0)
+      u *= t;
+      u.show("u:");
+      -| u:
+            1       0       0       0
+            0       1       0       0
+            0       0       1       0
+            0       0       0       1
+ </pre>
+    <p>If <code>inverse()</code> is called with no argument, or with the argument
+ <code>false</code>, it returns a
+ <code>Transform</code> representing its inverse, and remains unchanged.  If it
+ is called with the argument <code>true</code>, it is set to its inverse.
+ 
+    <p>Complete reversal of the transformations applied to a <code>Point</code>, as
+ in the previous example, probably won't make much sense.  However,
+ partial reversal is a valuable technique.  For example, it is used in
+ <code>rotate()</code> for rotation about a line defined by two <code>Points</code>. 
+ The following example merely demonstrates the basic principle;  an
+ example that does something useful would be too complicated.
+ 
+ <!-- !! TO DO:  Change this example so that it demonstrates rotation about -->
+ <!-- a line defined by two @code{Points}.  Change the paragraph above to -->
+ <!-- correspond.  LDF 2003.08.15. -->
+ <pre class="example">     Transform t;
+      t.shift(3, 4, 5);
+      t.rotate(45);
+      t.scale(2, 2, 2);
+      Point p;
+      p *= t;
+      p.show("p:");
+      -| p: (6, 12.7279, 1.41421)
+      t.inverse(true);
+      p.rotate(90, 90);
+      p *= t;
+      p.show("p:");
+      -| p: (3.36396, -5.62132, -2.37868)
+ </pre>
+    <!-- chapter Drawing and Labeling Points -->
+ <!-- gsdlpt.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Label-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Label-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Label Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link rel="prev" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link rel="next" href="Copying-Labels.html#Copying-Labels" title="Copying Labels">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Label-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Copying-Labels.html#Copying-Labels">Copying Labels</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Label-Reference.html#Label-Reference">Label Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Label-Reference.html#Label-Reference">Label Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">20.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point* <b>pt</b><var><a name="index-pt-294"></a></var><br>
+ <blockquote><p>A pointer to the <code>Point</code> representing the location of the
+ <code>Label</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>dot</b><var><a name="index-dot-295"></a></var><br>
+ <blockquote><p><code>true</code> if the label should be dotted, otherwise
+ <code>false</code>.
+ 
+         <p><code>dot</code> will be <code>false</code>, if the label was generated
+ by a call to <code>label()</code> with the &ldquo;<code>dot</code>&rdquo; argument
+ <code>false</code> (the default), <code>true</code>, if
+ the label was generated by a call to <code>dotlabel()</code>,
+ or to <code>label()</code> with the &ldquo;<code>dot</code>&rdquo; argument
+ <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>text</b><var><a name="index-text-296"></a></var><br>
+ <blockquote><p>The text of the label. 
+ <var>text</var> is always put between &ldquo;<code>btex</code>&rdquo; and &ldquo;<code>etex</code>&rdquo; in
+ the MetaPost code, so that TeX will be used to format the labels. In
+ particular, this means that TeX's math mode can be used.  However,
+ double backslashes must be used instead of single backslashes, in order
+ that single backslashes be written to <code>out_stream</code>.
+ 
+      <pre class="example">          Point P(1, 1, 2);
+           origin.drawarrow(P);
+           P.label("$\\vec{P}$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF76.png"
+ alt="[Figure 76. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 76. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>position</b><var><a name="index-position-297"></a></var><br>
+ <blockquote><p>The position of the text with respect to
+ <code>*pt</code>.  Valid values are as in MetaPost:
+ &ldquo;top&rdquo;, &ldquo;bot&rdquo; (bottom), &ldquo;lft&rdquo; (left), &ldquo;rt&rdquo;
+ (right), &ldquo;ulft&rdquo; (upper left),
+ &ldquo;llft&rdquo; (lower left), &ldquo;urt&rdquo; (upper right),
+ &ldquo;lrt&rdquo; (lower right). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: bool <b>DO_LABELS</b><var><a name="index-DO_005fLABELS-298"></a></var><br>
+ <blockquote><p>Enables or disables creation
+ of <code>Labels</code>.  If <code>true</code>, <code>label</code>
+ and <code>dotlabel()</code> cause <code>Labels</code> to be
+ created and put onto a <code>Picture</code>.  If
+ <code>false</code>, they are not.  Note that it is also
+ possible to suppress output of existing
+ <code>Labels</code> when outputting a <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Label-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Label-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Label-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Label-Reference.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Label Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="next" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Label-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">20 Label Reference</h2>
+ 
+ <p><a name="index-Label-293"></a>Class <code>Label</code> is defined in <samp><span class="file">pictures.web</span></samp>. 
+ <code>Point</code> and <code>Picture</code> are <code>friends</code> of <code>Label</code>.
+ 
+    <p>Labels can be included in drawings by using the <code>label()</code> and
+ <code>dotlabel()</code> functions, which are currently defined for the classes
+ <code>Point</code> and <code>Path</code>, and the classes derived from them. 
+ See <a href="Labelling-Points.html#Labelling-Points">Point Reference; Labelling</a>, and
+ See <a href="Labelling-Paths.html#Labelling-Paths">Path Reference; Labelling</a>. 
+ They are currently not defined for <code>Solid</code>, and its derived classes. 
+ I plan to add them for <code>Solid</code> soon.
+ 
+    <p>Users will normally
+ never need to declare objects of type <code>Label</code>, access its data
+ members or call its member functions directly.
+ 
+    <p>When <code>label()</code> or <code>dotlabel()</code> is invoked, one or more <code>Labels</code> is
+ allocated dynamically and pointers to the new <code>Labels</code> are placed
+ onto the <code>vector&lt;Label*&gt; labels</code> of a <code>Picture</code>:
+ <code>current_picture</code>, by default.  There are no explicitly defined
+ constructors for <code>Label</code>, nor is it intended that <code>Labels</code>
+ ever be created in any way other than through <code>label()</code> or
+ <code>dotlabel()</code>.  When a <code>Picture</code> is copied, the <code>Labels</code> are
+ copied, too, and when a <code>Picture</code> is cleared (using
+ <code>Picture::clear()</code>) or destroyed, the <code>Labels</code> are deallocated
+ and destroyed.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a>
+ <li><a accesskey="2" href="Copying-Labels.html#Copying-Labels">Copying Labels</a>
+ <li><a accesskey="3" href="Outputting-Labels.html#Outputting-Labels">Outputting Labels</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labeling-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Labeling-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labeling-Ellipses.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Labeling Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Ellipse-Operators.html#Ellipse-Operators" title="Ellipse Operators">
+ <link rel="next" href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses" title="Affine Transformations for Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Labeling-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.5 Labeling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> ([<var>const string pos = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-723"></a></var><br>
+ <blockquote><p>Labels the <code>Points</code> on <code>points</code>, using lowercase letters. 
+ <var>pos</var> is used to position all of the labels.  It is currently not
+ possible to have different positions for the labels.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+           e.label();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF161.png"
+ alt="[Figure 161. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 161. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: void <b>dotlabel</b> ([<var>string pos = "top", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-dotlabel-724"></a></var><br>
+ <blockquote><p>Like <code>label()</code>, except that the <code>Points</code> are dotted.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+           e.dotlabel();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF162.png"
+ alt="[Figure 162. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 162. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labeling-Points-Intro.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Labeling-Points-Intro.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labeling-Points-Intro.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Labeling Points Intro - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points" title="Drawing and Labeling Points">
+ <link rel="prev" href="Drawing-Points-Intro.html#Drawing-Points-Intro" title="Drawing Points Intro">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Labeling-Points-Intro"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">5.2 Labeling Points</h3>
+ 
+ <p>The labels in the previous examples were made by using the functions
+ <code>Point::label()</code> and <code>Point::dotlabel()</code>, which make it
+ possible to include TeX text in a drawing.
+ 
+    <p><code>label()</code> and <code>dotlabel()</code> take <code>string</code> arguments for
+ the text of the label and the position of the label with respect to the
+ <code>Point</code>.  The label text is formatted using TeX, so it can contain
+ math mode material between dollar signs.  Please note that double backslashes
+ must be used, where a single backslash would suffice in a file of
+ MetaPost code, for example, for TeX control sequences. 
+ Alternatively, a <code>short</code> argument can be used for the label.
+ 
+    <p>The position argument is optional, with <code>"top"</code> as the default.  If
+ the empty <code>string</code> <code>""</code> is used, the label will centered about
+ the <code>Point</code> itself.  This will usually only make sense for
+ <code>label()</code>, because it would otherwise interfere with the dot. 
+ Valid arguments for the
+ position are the same as in MetaPost: <code>"top"</code>, <code>"bot"</code>
+ (bottom), <code>"lft"</code> (left), <code>"rt"</code> (right),
+ <code>"ulft"</code> (upper left), <code>"urt"</code> (upper right),
+ <code>"llft"</code> (lower left), and <code>"lrt"</code> (lower right).
+ 
+ <pre class="example">     Point p0;
+      Point p1(1);
+      Point p2(2);
+      Point p3(p0);
+      Point p4(p1);
+      Point p5(p2);
+      p3 *= p4 *= p5.shift(0, 1);
+      p0.draw(p1);
+      p1.draw(p2);
+      p2.draw(p5);
+      p5.draw(p4);
+      p4.draw(p3);
+      p3.draw(p0);
+      p0.label($p_0$, "");
+      p1.dotlabel(1);
+      p2.dotlabel("p2", "bot");
+      p3.dotlabel("This is $p_3$", "lft");
+      p4.label(4);
+      p5.label("$\\leftarrow p_5$", "rt");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF8.png"
+ alt="[Figure 8. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 8. 
+ <br>
+ </p>
+ 
+    <p>For complete descriptions of <code>Point::label()</code> and
+ <code>Point::dotlabel()</code>, see <a href="Labelling-Points.html#Labelling-Points">Points; Labelling</a>.
+ 
+ <!-- chapter Paths -->
+ <!-- gspaths.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labelling-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Labelling-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labelling-Paths.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,78 ----
+ <html lang="en">
+ <head>
+ <title>Labelling Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths" title="Drawing and Filling Paths">
+ <link rel="next" href="Showing-Paths.html#Showing-Paths" title="Showing Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Labelling-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Paths.html#Showing-Paths">Showing Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.13 Labelling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> ([<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, </var>[<var>bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-label-602"></a></var><br>
+ &mdash; <code>const</code> function: void <b>label</b> (<var>Picture&amp; picture, </var>[<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, </var>[<var>bool dot = </var><code>false</code>]]]])<var><a name="index-label-603"></a></var><br>
+ <blockquote><p>Calls <code>Point::label()</code> on all of the <code>Points</code> on
+ <code>points</code>.  They are numbered consecutively starting with <var>i</var>. 
+ The other arguments are used for all of the <code>Points</code>, so it's not
+ possible to specify different positions for the labels for different
+ <code>Points</code>.  <var>dot</var> will normally not be specified, unless a
+ <var>picture</var> argument is used in the first version.  <code>dotlabel()</code>
+ calls <code>label()</code> with <var>dot</var> = <code>true</code>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>dotlabel</b> ([<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-dotlabel-604"></a></var><br>
+ &mdash; <code>const</code> function: void <b>dotlabel</b> (<var>Picture&amp; picture, </var>[<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0</var>]]])<var><a name="index-dotlabel-605"></a></var><br>
+ <blockquote><p>Like <code>label()</code>, except that the <code>Points</code> are dotted. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labelling-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Labelling-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Labelling-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Labelling-Points.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,155 ----
+ <html lang="en">
+ <head>
+ <title>Labelling Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Drawing-Functions.html#Point-Drawing-Functions" title="Point Drawing Functions">
+ <link rel="next" href="Showing-Points.html#Showing-Points" title="Showing Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Labelling-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Points.html#Showing-Points">Showing Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.19 Labelling</h3>
+ 
+ <p>Labels make it possible to include TeX text within a drawing. 
+ Labels are implemented by means of <code>class Label</code>. 
+ The functions <code>label()</code> and <code>dotlabel()</code>, described in this
+ section, create objects of type <code>Label</code>, and add them to the
+ <code>Picture</code>, which was passed to them as an argument
+ (<code>current_picture</code>, by default). 
+ See <a href="Label-Reference.html#Label-Reference">Label Reference</a>, for more information.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> (<var>const string text_str, </var>[<var>const string position_str = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-457"></a></var><br>
+ &mdash; <code>const</code> function: void <b>label</b> (<var>const short text_short, </var>[<var>const string position_str = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-458"></a></var><br>
+ <blockquote><p>These functions cause a <code>Point</code> to be labelled in the drawing. 
+ The first argument is the text of the label. It can either be a
+ <code>string</code>, in the first version, or a <code>short</code>, in the second. 
+ It will often be the name of the <code>Point</code> in the C++
+  code, for
+ example, <code>"p0"</code>. 
+ It is not possible to automate this kind of
+ labelling, because it is not possible to access the names of variables
+ through the variables themselves in C++
+ .
+ 
+         <p><var>text_str</var> is always placed between
+ &ldquo;<code>btex''</code> and &ldquo;<code>etex</code>&rdquo; in the MetaPost <code>label</code> command
+ written to <code>out_stream</code>.  This makes it possible to include math
+ mode material in the text of labels, as in the following example.
+ 
+      <pre class="example">          Point p0(2, 3);
+           p0.label("$p_0$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF101.png"
+ alt="[Figure 101. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 101. 
+ <br>
+ </p>
+ 
+         <p>If backslashes are needed in the text of the label, then
+ <var>text_str</var> must contain double backslashes, so that single
+ backslashes will be written to <code>out_stream</code>.
+ 
+      <pre class="example">          Point P;
+           Point Q(2, 2);
+           Point R(P.mediate(Q));
+           R.label("$\\overrightarrow{PQ}$", "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF102.png"
+ alt="[Figure 102. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 102. 
+ <br>
+ </p>
+ 
+         <p>The <var>position</var> argument indicates where the text of the label should
+ be located relative to the <code>Point</code>.  The valid values are the
+ strings used in MetaPost for this purpose, i.e., &lsquo;<samp><span class="samp">top</span></samp>&rsquo;, &lsquo;<samp><span class="samp">bot</span></samp>&rsquo;,
+ &lsquo;<samp><span class="samp">lft</span></samp>&rsquo;, &lsquo;<samp><span class="samp">rt</span></samp>&rsquo;, &lsquo;<samp><span class="samp">llft</span></samp>&rsquo; (lower left), &lsquo;<samp><span class="samp">lrt</span></samp>&rsquo; (lower
+ right), &lsquo;<samp><span class="samp">ulft</span></samp>&rsquo; (upper left), and &lsquo;<samp><span class="samp">urt</span></samp>&rsquo; (upper right).  The
+ default is &lsquo;<samp><span class="samp">top</span></samp>&rsquo;.  3DLDF does not catch the error if an invalid
+ <code>position</code> argument is used; the <code>string</code> is written to the
+ output file and an error will occur when MetaPost is run.
+ 
+         <p>The <var>dot</var> argument is used to determine whether the label should be
+ dotted or not.  The default is <code>false</code>.  The function
+ <code>dotlabel()</code> calls <code>label()</code>, passing <code>true</code> as the
+ latter's <var>dot</var> argument. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>dotlabel</b> ([<var>const string text_str, </var>[<var>const string position_str = "top", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-dotlabel-459"></a></var><br>
+ &mdash; <code>const</code> function: void <b>dotlabel</b> (<var>const short text_short, </var>[<var>const string position_str = "top", </var>[<var>Picture&amp; picture = current_picture</var>]])<var><a name="index-dotlabel-460"></a></var><br>
+ <blockquote><p>These functions are like <code>label()</code> except that they always produces a
+ dot.
+ 
+      <pre class="example">          Point p0(2, 3);
+           p0.dotlabel("$p_0$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF103.png"
+ alt="[Figure 103. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 103. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Constructors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Constructors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Constructors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Constructors.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Line Constructors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Line-Global-Constants.html#Line-Global-Constants" title="Line Global Constants">
+ <link rel="next" href="Line-Operators.html#Line-Operators" title="Line Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Line-Constructors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Line-Operators.html#Line-Operators">Line Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Global-Constants.html#Line-Global-Constants">Line Global Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Line</b> (<var>const Point&amp; pos = </var><code>origin</code><var>, const Point&amp; dir = </var><code>origin</code>)<var><a name="index-Line-503"></a></var><br>
+ <blockquote><p>Creates a <code>Line</code>, setting <code>position</code> to <var>pos</var>, and
+ <code>direction</code> to <var>dir</var>.  If this function is called with no
+ arguments, it creates a <code>Line</code> at the <code>origin</code> with no
+ direction.
+ 
+      <pre class="example">          Point p(2, 1, 2);
+           Point d(-3, 3, 3.5);
+           Line L0(p, d);
+           Line L1 = p.get_line(d);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF104.png"
+ alt="[Figure 104. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 104. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Line</b> (<var>const Line&amp; l</var>)<var><a name="index-Line-504"></a></var><br>
+ <blockquote><p>Creates a <code>Line</code>, making it a copy of <var>l</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,67 ----
+ <html lang="en">
+ <head>
+ <title>Line Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="next" href="Line-Global-Constants.html#Line-Global-Constants" title="Line Global Constants">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Line-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Line-Global-Constants.html#Line-Global-Constants">Line Global Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Reference.html#Line-Reference">Line Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>position</b><var><a name="index-position-500"></a></var><br>
+ <blockquote><p>Represents the position vector of the <code>Line</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>direction</b><var><a name="index-direction-501"></a></var><br>
+ <blockquote><p>Represents the direction vector of the <code>Line</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Global-Constants.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Global-Constants.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Global-Constants.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,62 ----
+ <html lang="en">
+ <head>
+ <title>Line Global Constants - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Line-Data-Members.html#Line-Data-Members" title="Line Data Members">
+ <link rel="next" href="Line-Constructors.html#Line-Constructors" title="Line Constructors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Line-Global-Constants"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Line-Constructors.html#Line-Constructors">Line Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Data-Members.html#Line-Data-Members">Line Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.2 Global Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Line <b>INVALID_LINE</b><var><a name="index-INVALID_005fLINE-502"></a></var><br>
+ <blockquote><p><code>position</code> and <code>direction</code> are both <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Operators.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Line Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Line-Constructors.html#Line-Constructors" title="Line Constructors">
+ <link rel="next" href="Get-Path.html#Get-Path" title="Get Path">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Line-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Get-Path.html#Get-Path">Get Path</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Constructors.html#Line-Constructors">Line Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Line&amp; l</var>)<var><a name="index-operator_003d-505"></a></var><br>
+ <blockquote><p>Sets <code>*this</code> to <var>l</var>. 
+ </p></blockquote></div>
+ 
+ <!-- LDF 2003.06.03.  Add description of @code{get_distance()}, when I've -->
+ <!-- fixed it. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Line-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Line-Reference.html
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*** 0 ****
--- 1,76 ----
+ <html lang="en">
+ <head>
+ <title>Line Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="next" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Line-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">24 Line Reference</h2>
+ 
+ <p><a name="index-Line-499"></a>The <code>struct Line</code> is defined in <samp><span class="file">lines.web</span></samp>. 
+ <code>Lines</code> are not <code>Shapes</code>.  They are used for
+ performing vector operations.  A <code>Line</code> is defined by a
+ <code>Point</code> representing a position vector and a <code>Point</code>
+ representing a direction vector.
+ 
+    <p>See also the descriptions of <code>Point::get_line()</code> in
+ <a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a>, and
+ <code>Path::get_line()</code> in
+ <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Line-Data-Members.html#Line-Data-Members">Line Data Members</a>
+ <li><a accesskey="2" href="Line-Global-Constants.html#Line-Global-Constants">Line Global Constants</a>
+ <li><a accesskey="3" href="Line-Constructors.html#Line-Constructors">Line Constructors</a>
+ <li><a accesskey="4" href="Line-Operators.html#Line-Operators">Line Operators</a>
+ <li><a accesskey="5" href="Get-Path.html#Get-Path">Get Path</a>
+ <li><a accesskey="6" href="Showing.html#Showing">Showing</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Manual-Conventions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Manual-Conventions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Manual-Conventions.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Manual Conventions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="About-This-Manual.html#About-This-Manual" title="About This Manual">
+ <link rel="prev" href="About-This-Manual.html#About-This-Manual" title="About This Manual">
+ <link rel="next" href="Illustrations.html#Illustrations" title="Illustrations">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Manual-Conventions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Illustrations.html#Illustrations">Illustrations</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="About-This-Manual.html#About-This-Manual">About This Manual</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="About-This-Manual.html#About-This-Manual">About This Manual</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">1.2.1 Conventions</h4>
+ 
+ <p>Data types are formatted like this:  <code>int</code>,
+ <code>Point</code>, <code>Path</code>.  Plurals are formatted in the same way:
+ <code>ints</code>, <code>Points</code>, <code>Paths</code>.  It is poor
+ typographical practice to typeset a single word using more than one
+ font, e.g., <code>int</code>s, <code>Point</code>s, <code>Path</code>s.  This applies to
+ data types whose plurals do not end in &ldquo;s&rdquo; as well, e.g.,
+ the plural of the C++
+  <code>class Polyhedron</code> is <code>Polyhedra</code>.
+ 
+    <p>When C++
+  functions are discussed in this manual, I always include a
+ pair
+ of parentheses to make it clear that the item in question is a function
+ and not a variable, but I generally do not
+ include the arguments.  For example, if I mention the
+ function
+ <code>foo()</code>, this doesn't imply that <code>foo()</code> takes no
+ arguments.  If it were appropriate, I would include the argument type:
+ 
+ <pre class="example">     foo(int)
+ </pre>
+    <p class="noindent">or the argument type and a placeholder name:
+ 
+ <pre class="example">     foo(int arg)
+ </pre>
+    <p class="noindent">or I would write
+ 
+ <pre class="example">     foo(void)
+ </pre>
+    <p><a name="index-member-function-3"></a><a name="index-function_002c-member-4"></a>to indicate that <code>foo()</code> takes no arguments.  Also, I
+ generally don't indicate the return type, unless it is relevant.  If it
+ is a member function
+ of a class, I may indicate this,
+ e.g.,, <code>bar_class::foo()</code>, or not,
+ depending on whether this information is relevant.  This convention
+ differs from that used in the <a href="Function-Index.html#Function-Index">Function Index</a>, which is generated
+ automatically by Texinfo.  There, only the name of the function appears,
+ without parentheses, parameters, or return values.  The class type
+ of member functions may appear in the Function Index, (e.g.,
+ <code>bar_class::foo</code>), but only in index entries that have been entered
+ explicitly by the author;  such entries are not generated by Texinfo
+ automatically.
+ 
+    <p>Examples are formatted as follows:
+ 
+ <pre class="example">     Point p0(1, 2, 3);
+      Point p1(5, 6, 7.9);
+      Path pa(p0, p1);
+      p0.show("p0:");
+      -| p0: (1, 2, 3)
+ </pre>
+    <p>The beautiful mathematical typesetting produced by TeX
+ unfortunately does not appear in the Info and HTML versions of this
+ manual.  In these, the following symbols are used to replace the proper
+ mathematical symbols.
+ 
+      <dl>
+ <dt>^<dd>Precedes a superscript.  For example, read &lsquo;<samp><span class="samp">a^2</span></samp>&rsquo; as
+ &ldquo;a squared&rdquo;.
+ 
+      <br><dt>_<dd>Precedes a subscript.  For example, read &lsquo;<samp><span class="samp">x_1</span></samp>&rsquo; as
+ &ldquo;x sub one&rdquo;.
+ 
+      <br><dt>*<dd>Multiplication.  For example, read &lsquo;<samp><span class="samp">x * y</span></samp>&rsquo; as
+ &ldquo;x times y&rdquo;.
+ 
+      <br><dt>sqrt()<dd>The square root function.  For example, read &lsquo;<samp><span class="samp">sqrt(x)</span></samp>&rsquo; as
+ &ldquo;the square root of x&rdquo;. 
+ </dl>
+ 
+    <p>In addition, examples
+ can contain the following symbols:
+ 
+      <dl>
+ <dt>-|<dd>Indicates output to the terminal when 3DLDF is
+ run.
+ 
+      <br><dt>&rArr;<dd>Indicates a result of some sort.  It may precede a illustration
+ generated by the code in the example.
+ 
+      <br><dt>error--&gt;<dd>Indicates that the following text is an error message. 
+ </dl>
+ 
+    <p>This manual does not use all of the symbols provided by Texinfo.  If you
+ find a symbol you don't understand in this manual (which shouldn't
+ happen), see page 103 of the Texinfo manual.
+ 
+    <p><a name="index-symbols-5"></a>
+    <pre class="sp">
+ 
+ </pre>
+ Symbols:
+      <dl>
+ <dt>N
+ <dd>The set of the natural numbers
+ {0, 1, 2, 3, 4, <small class="dots">...</small>}
+ 
+      <br><dt>I
+ <dd>The set of the integers
+ {<small class="dots">...</small>, -3, -2, -1, 0, 1, 2, 3, 4, <small class="dots">...</small>}
+ 
+      <br><dt>R
+ <dd>The set of the real numbers. 
+ </dl>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Matrix-Inversion.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Matrix-Inversion.html
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*** 0 ****
--- 1,71 ----
+ <html lang="en">
+ <head>
+ <title>Matrix Inversion - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Transform-Operators.html#Transform-Operators" title="Transform Operators">
+ <link rel="next" href="Setting-Values-Transforms.html#Setting-Values-Transforms" title="Setting Values Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Matrix-Inversion"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Setting-Values-Transforms.html#Setting-Values-Transforms">Setting Values Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Operators.html#Transform-Operators">Transform Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.5 Matrix Inversion</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Transform <b>inverse</b> (<var>void</var>)<var><a name="index-inverse-275"></a></var><br>
+ &mdash; Function: Transform <b>inverse</b> ([<var>bool assign = </var><code>false</code>])<var><a name="index-inverse-276"></a></var><br>
+ <blockquote><p>Returns a <code>Transform</code> <code>T</code> with a <code>T.matrix</code> that is the
+ inverse of <code>matrix</code>.  If <var>assign</var>==<code>true</code>, then
+ <code>matrix</code> is set to its inverse.
+ 
+         <p>In the <code>const</code> version, <code>matrix</code> remains unchanged. 
+ The second should only ever be called with <code>true</code> as its
+ <var>assign</var> argument.  If you're tempted call <code>inverse(false)</code>,
+ you might as well just leave out the argument, which issues a warning
+ message, and calls the <code>const</code> version. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Metafont-and-MetaPost.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Metafont-and-MetaPost.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Metafont-and-MetaPost.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,143 ----
+ <html lang="en">
+ <head>
+ <title>Metafont and MetaPost - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="CWEB-Documentation.html#CWEB-Documentation" title="CWEB Documentation">
+ <link rel="next" href="Caveats.html#Caveats" title="Caveats">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Metafont-and-MetaPost"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Caveats.html#Caveats">Caveats</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="CWEB-Documentation.html#CWEB-Documentation">CWEB Documentation</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.4 Metafont and MetaPost</h3>
+ 
+ <p><a name="index-Metafont-12"></a>Metafont is  a system created by Donald E. Knuth for generating fonts,
+ in particular for use with TeX, his well-known
+ typsetting system.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ Expressed in a
+ somewhat simplified way,  Metafont is a system for programming
+ curves, which  are then  digitized and  output in  the form of
+ run-time encoded bitmaps. (See Knuth's <cite>The Metafontbook</cite> for more
+ information).
+ 
+    <p><a name="index-MetaPost-13"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-14"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-15"></a>John D. Hobby  modified  Metafont's  source  code  to  create
+ MetaPost, which  functions in  much the same way, but outputs
+ encapsulated PostScript (EPS) files instead of bitmaps.  MetaPost is
+ very  useful   for  creating  graphics  and  is  a  convenient
+ interface to  PostScript.   It is also easy both to imbed
+ TeX code  in MetaPost  programs, for instance, for typesetting
+ labels, and  to include  MetaPost  graphics  in  ordinary  TeX
+ files, e.g., by using <samp><span class="command">dvips</span></samp>.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ Apart from simply printing the PostScript file output by
+ <samp><span class="command">dvips</span></samp>, there are many programs that can process ordinary
+ or encapsulated PostScript files and convert them to other formats. 
+ Just two of the many possibilities are ImageMagick and GIMP, both of
+ which can be used to create animations from MetaPost graphics. 
+ <!-- !! GET REFERENCES TO IMAGEMAGICK AND GIMP!!  Maybe someday I'll do -->
+ <!-- this.  At the moment, I don't feel like looking for any more references. -->
+ 
+    <p>However, MetaPost  inherited  a  significant  limitation  from
+ Metafont:  it's not possible to use it for making
+ three-dimensional graphics, except in a very limited way. 
+ One insuperable problem is the severe limitation on the magnitude
+ of user-defined numerical variables in Metafont and
+ MetaPost.<a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>
+ This
+ made  sense for Metafont's and MetaPost's original
+ purposes,  but   they  make   it  impossible  to  perform  the
+ calculations needed for 3D graphics.
+ 
+    <p>Another problem is the data types defined in Metafont:  Points
+ are  represented   as  pairs   of  real   values  and   affine
+ transformations as sets of 6 real values.  This corresponds to
+ the representation of points and affine transformations in the
+ plane as  a two-element  vector on  the one  hand  and  a  six
+ element matrix  on the  other.  While  it  is
+ possible to  work around  the  limitation  imposed  by  having
+ points be  represented by  only two  values, it is
+ impracticable in   the   case   of   the
+ transformations.
+ 
+    <p>For these reasons, I decided to write a program that would behave more
+ or less like Metafont, but with suitable extensions, and the ability to
+ handle three dimensional data;  namely 3DLDF.  It stores the data and
+ performs the transformations and other necessary calculations and is not
+ subject to the limitations of MetaPost and its data types.  Upon output,
+ it performs a perspective transformation, converting the 3D image into a
+ 2D one.  The latter can now be expressed as an ordinary MetaPost
+ program, so 3DLDF writes its output as MetaPost code to a file.
+ 
+    <p>In the following, it may be a little unclear why I sometimes refer to
+ Metafont and sometimes to MetaPost.  The reason is that Metafont
+ inherited much of its functionality from Metafont.  Certain operations
+ in Metafont have no meaning in MetaPost and so have been removed, while
+ MetaPost's function of interfacing with PostScript has caused other
+ operations to be added.  For example, in MetaPost, <code>color</code> is a
+ data type, but not in Metafont.  Unless otherwise stated, when I refer to
+ Metafont, it can be assumed that what I say applies to MetaPost as well. 
+ However, when I refer to MetaPost, it will generally be in connection
+ with features specific to MetaPost.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Knuth, Donald E. <em>The
+ TeXbook</em>. Computers and Typesetting; A. 
+ Addison-Wesley Publishing Company. Reading, Massachusetts 1986.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Rokicki, Tomas. <em>Dvips: A
+ DVI-to-PostScript Translator</em> February 1997.  Available from CTAN. 
+ See <a href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> &ldquo;&lt;<small class="dots">...</small>&gt;
+ METAFONT deals only with numbers in a limited
+ range:  A numeric token must be less than 4096, and its value is always
+ rounded to the nearest  multiple of
+ 1 / 65536.&rdquo;  Knuth, The METAFONTbook, p. 50. 
+ </p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Colors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Colors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Colors.html	Thu Jan  1 00:00:00 1970
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***************
*** 0 ****
--- 1,91 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Colors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Color-Operators.html#Color-Operators" title="Color Operators">
+ <link rel="next" href="Showing-Colors.html#Showing-Colors" title="Showing Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Colors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Colors.html#Showing-Colors">Showing Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Color-Operators.html#Color-Operators">Color Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.4 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_name</b> (<var>const string s</var>)<var><a name="index-set_005fname-182"></a></var><br>
+ <blockquote><p>Sets <code>name</code> to <var>s</var>.  <code>use_name</code> is not reset. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_use_name</b> (<var>const bool b</var>)<var><a name="index-set_005fuse_005fname-183"></a></var><br>
+ <blockquote><p>Sets <code>use_name</code> to <var>b</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>modify</b> (<var>const real r, </var>[<var>const real g = 0, </var>[<var>const real b = 0</var>]])<var><a name="index-modify-184"></a></var><br>
+ <blockquote><p>Adds <var>r</var>, <var>g</var>, and <var>b</var> to <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code>, respectively.  Following the
+ addition, if <code>red_part</code>, <code>green_part</code>, and/or <code>blue_part</code>
+ is greater than 1, it is reduced to 1.  If it is less than 0, it is
+ increased to 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_red_part</b> (<var>const real q</var>)<var><a name="index-set_005fred_005fpart-185"></a></var><br>
+ &mdash; Function: void <b>set_green_part</b> (<var>const real q</var>)<var><a name="index-set_005fgreen_005fpart-186"></a></var><br>
+ &mdash; Function: void <b>set_blue_part</b> (<var>const real q</var>)<var><a name="index-set_005fblue_005fpart-187"></a></var><br>
+ <blockquote><p>Let p stand for <code>red_part</code>,
+ <code>green_part</code>, or <code>blue_part</code>, depending upon which function is
+ used. 
+ If
+ 0 &lt;= q &lt;= 1,
+ p is set to q.  If
+ q &lt; 0, p is set to 0. 
+ If q &gt; 1, p is set to 1. 
+ </p></blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Focuses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Focuses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Focuses.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Focuses.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,63 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Focuses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Focus-Operators.html#Focus-Operators" title="Focus Operators">
+ <link rel="next" href="Querying-Focuses.html#Querying-Focuses" title="Querying Focuses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Focuses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focus-Operators.html#Focus-Operators">Focus Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.5 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_angle</b> (<var>const real ang</var>)<var><a name="index-reset_005fangle-489"></a></var><br>
+ <blockquote><p>Resets the value of <code>angle</code> and recalculates the <code>Transforms</code>
+ <code>transform</code> and <code>persp</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,122 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Clearing-Paths.html#Clearing-Paths" title="Clearing Paths">
+ <link rel="next" href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths" title="Affine Transformations for Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Clearing-Paths.html#Clearing-Paths">Clearing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.8 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = </var><code>true</code>])<var><a name="index-set_005fon_005ffree_005fstore-563"></a></var><br>
+ <blockquote><p>Sets <code>on_free_store</code> to <var>b</var>.  This is used in the
+ template function <code>create_new()</code>. 
+ See <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_fill_draw_value</b> (<var>const signed short s</var>)<var><a name="index-set_005ffill_005fdraw_005fvalue-564"></a></var><br>
+ <blockquote><p>Sets <code>fill_draw_value</code> to <var>s</var>, which should be one of
+ <code>Shape::DRAW</code>, <code>Shape::FILL</code>, <code>Shape::FILLDRAW</code>,
+ <code>Shape::UNDRAW</code>, <code>Shape::UNFILL</code>, or <code>Shape::UNFILLDRAW</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_draw_color</b> (<var>const Color&amp; c</var>)<var><a name="index-set_005fdraw_005fcolor-565"></a></var><br>
+ &mdash; Virtual function: void <b>set_draw_color</b> (<var>const Color * c</var>)<var><a name="index-set_005fdraw_005fcolor-566"></a></var><br>
+ <blockquote><p>Sets <code>draw_color</code> (a pointer to a <code>const Color</code>) to <var>&amp;c</var>
+ or <var>c</var>, depending on whether the
+ version with a reference argument or the version with a pointer argument
+ is used.
+ 
+         <p><code>set_draw_color()</code> is used in the <code>Solid</code> drawing and filling
+ functions, because <code>Path::draw_color</code> is <code>protected</code>, and
+ the <code>Solid</code> cannot access it directly. 
+ See <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_fill_color</b> (<var>const Color&amp; c</var>)<var><a name="index-set_005ffill_005fcolor-567"></a></var><br>
+ &mdash; Virtual function: void <b>set_fill_color</b> (<var>const Color* c</var>)<var><a name="index-set_005ffill_005fcolor-568"></a></var><br>
+ <blockquote><p>Sets <code>fill_color</code> (a pointer to a <code>const Color</code>) to <var>&amp;c</var>
+ or <var>c</var>, depending on whether the
+ version with a reference argument or the version with a pointer argument
+ is used.
+ 
+         <p><code>set_fill_color()</code> is used in the <code>Solid</code> drawing and filling
+ functions, because
+ <code>Path::fill_color</code> is <code>protected</code>, and
+ the <code>Solid</code> cannot access it directly. 
+ See <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_dash_pattern</b> ([<var>const string s = ""</var>])<var><a name="index-set_005fdash_005fpattern-569"></a></var><br>
+ <blockquote><p>Sets <code>dashed</code> to <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_pen</b> ([<var>const string s = ""</var>])<var><a name="index-set_005fpen-570"></a></var><br>
+ <blockquote><p>Sets <code>pen</code> to <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_connectors</b> ([<var>const string s = ".."</var>])<var><a name="index-set_005fconnectors-571"></a></var><br>
+ <blockquote><p>Clears <code>connectors</code> and then pushes <var>s</var> onto it, making <var>s</var>
+ the only connector.  Additional connectors can be added by using
+ <code>Path::operator+=(const string)</code>. 
+ See <a href="Path-Operators.html#Path-Operators">Path Reference; Operators</a>.
+ 
+         <p>I plan to add a version of this function taking a vector of
+ <code>strings</code> as its argument, to make it possible to set several
+ connectors at one time. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Pictures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Pictures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Pictures.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Pictures.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,82 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Pictures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures" title="Affine Transformations for Pictures">
+ <link rel="next" href="Showing-Pictures.html#Showing-Pictures" title="Showing Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Pictures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.6 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-319"></a></var><br>
+ <blockquote><p>Destroys the <code>Shapes</code> and <code>Labels</code> on the
+ <code>Picture</code> and removes all the <code>Shape</code> pointers from
+ <code>shapes</code> and the <code>Label</code> pointers from <code>labels</code>. 
+ All dynamically allocated objects are deallocated, namely the
+ <code>Shapes</code>, the <code>Labels</code>, and the <code>Points</code> belonging to the
+ <code>Labels</code>. <code>transform</code> is reset to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_transform</b> (<var>void</var>)<var><a name="index-reset_005ftransform-320"></a></var><br>
+ <blockquote><p>Resets <code>transform</code> to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>set_transform</b> (<var>const Transform&amp; t</var>)<var><a name="index-set_005ftransform-321"></a></var><br>
+ <blockquote><p>Sets <code>transform</code> to <code>t</code> and returns <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>kill_labels</b> (<var>void</var>)<var><a name="index-kill_005flabels-322"></a></var><br>
+ <blockquote><p>Removes the <code>Labels</code> from the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Returning-Information-for-Points.html#Returning-Information-for-Points" title="Returning Information for Points">
+ <link rel="next" href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points" title="Affine Transformations for Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Information-for-Points.html#Returning-Information-for-Points">Returning Information for Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.11 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = true</var>])<var><a name="index-set_005fon_005ffree_005fstore-411"></a></var><br>
+ <blockquote><p>This function is used in the template function
+ <code>create_new()</code>.  It sets <code>on_free_store</code> to <code>true</code>. 
+ See <a href="Point-Data-Members.html#Point-Data-Members">Point Reference; Data Members</a>, and
+ <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-412"></a></var><br>
+ <blockquote><p>Sets all of the coordinates in all of the sets of coordinates (i.e.,
+ <code>world_coordinates</code>, <code>user_coordinates</code>, <code>view_coordinates</code>, and
+ <code>projective_coordinates</code>) to 0 and resets <code>transform</code>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clean</b> ([<var>int factor = 1</var>])<var><a name="index-clean-413"></a></var><br>
+ <blockquote><p>Calls <code>apply_transform()</code> and sets the values of
+ <code>world_coordinates</code> to 0, whose absolute values are less than
+ <code>epsilon()</code> * <var>factor</var>
+ . 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_transform</b> (<var>void</var>)<var><a name="index-reset_005ftransform-414"></a></var><br>
+ <blockquote><p>Sets <code>Transform</code> to the identity <code>Transform</code>.  Performed in
+ <code>apply_transform()</code>, after the latter updates <code>world_coordinates</code>. 
+ <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Modifying-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Modifying-Shapes.html	Thu Jan  1 00:00:00 1970
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--- 1,69 ----
+ <html lang="en">
+ <head>
+ <title>Modifying Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Copying-Shapes.html#Copying-Shapes" title="Copying Shapes">
+ <link rel="next" href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes" title="Affine Transformations for Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Modifying-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Copying-Shapes.html#Copying-Shapes">Copying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.4 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: bool <b>set_on_free_store</b> (<var>bool b = </var><code>true</code>)<var><a name="index-set_005fon_005ffree_005fstore-243"></a></var><br>
+ <blockquote><p>Sets the data member <code>on_free_store</code> to <var>b</var>.  All classes
+ derived from <code>Shape</code> must therefore also have a data member
+ <code>on_free_store</code>.
+ 
+         <p>This function is used in the template function
+ <code>create_new&lt;</code><i>type</i><code>&gt;</code>. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Multi_002dThreading.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Multi_002dThreading.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Multi_002dThreading.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Multi_002dThreading.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Multi-Threading - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="prev" href="Shadows.html#Shadows" title="Shadows">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Multi-Threading"></a>
+ <a name="Multi_002dThreading"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shadows.html#Shadows">Shadows</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Future-Plans.html#Future-Plans">Future Plans</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">40.4 Multi-Threading</h3>
+ 
+ <p><a name="index-multi_002dthreading-910"></a>When 3DLDF is run, there is only one thread of execution. 
+ However, it could benefit from the use of multiple threads. 
+ In particular, it may be faster and more efficient to have
+ <code>Picture::output()</code> run in its own thread. 
+ In this case, it will no longer be possible to share
+ <code>current_picture</code> among figures.
+ 
+    <p>It may also be
+ worthwhile to execute the code for &ldquo;figures&rdquo;, i.e., the code
+ between &lsquo;<samp><span class="samp">beginfig()</span></samp>&rsquo; and &lsquo;<samp><span class="samp">endfig()</span></samp>&rsquo;, inclusive,
+ in their own threads.  This will require some changes in the way data
+ are handled.  For example, if non-constant objects are shared
+ among figures, there may be no advantage to multi-threading because of
+ the need to coordinate the access of the threads to the objects. 
+ If threads are used, then non-constant objects should be
+ declared locally within the figure.  They may be locally declared
+ copies of global objects.  Alternatively,  <code>beginfig()</code> could be
+ changed so that objects could be passed to it as  arguments, perhaps as
+ a <code>vector&lt;void*&gt;</code> and/or a <code>vector&lt;Shape*&gt;</code>.
+ 
+ <!-- Local Variables: -->
+ <!-- eval:(outline-minor-mode) -->
+ <!-- eval:(read-abbrev-file) -->
+ <!-- run-texi2dvi-on-file:"3DLDF.texi" -->
+ <!-- run-dvips-on-file:"3DLDF.dvi" -->
+ <!-- End: -->
+ <!-- changes.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Colors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Colors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Colors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Colors.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,123 ----
+ <html lang="en">
+ <head>
+ <title>Namespace Colors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors" title="Defining and Initializing Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Namespace-Colors"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.8 Namespace Colors.</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Color <b>red</b><var><a name="index-red-197"></a></var><br>
+ &mdash; Constant: const Color <b>green</b><var><a name="index-green-198"></a></var><br>
+ &mdash; Constant: const Color <b>blue</b><var><a name="index-blue-199"></a></var><br>
+ &mdash; Constant: const Color <b>cyan</b><var><a name="index-cyan-200"></a></var><br>
+ &mdash; Constant: const Color <b>yellow</b><var><a name="index-yellow-201"></a></var><br>
+ &mdash; Constant: const Color <b>magenta</b><var><a name="index-magenta-202"></a></var><br>
+ &mdash; Constant: const Color <b>orange_red</b><var><a name="index-orange_005fred-203"></a></var><br>
+ &mdash; Constant: const Color <b>violet_red</b><var><a name="index-violet_005fred-204"></a></var><br>
+ &mdash; Constant: const Color <b>pink</b><var><a name="index-pink-205"></a></var><br>
+ &mdash; Constant: const Color <b>green_yellow</b><var><a name="index-green_005fyellow-206"></a></var><br>
+ &mdash; Constant: const Color <b>orange</b><var><a name="index-orange-207"></a></var><br>
+ &mdash; Constant: const Color <b>violet</b><var><a name="index-violet-208"></a></var><br>
+ &mdash; Constant: const Color <b>purple</b><var><a name="index-purple-209"></a></var><br>
+ &mdash; Constant: const Color <b>blue_violet</b><var><a name="index-blue_005fviolet-210"></a></var><br>
+ &mdash; Constant: const Color <b>yellow_green</b><var><a name="index-yellow_005fgreen-211"></a></var><br>
+ &mdash; Constant: const Color <b>black</b><var><a name="index-black-212"></a></var><br>
+ &mdash; Constant: const Color <b>white</b><var><a name="index-white-213"></a></var><br>
+ &mdash; Constant: const Color <b>gray</b><var><a name="index-gray-214"></a></var><br>
+ &mdash; Constant: const Color <b>light_gray</b><var><a name="index-light_005fgray-215"></a></var><br>
+ <blockquote><p>These constant <code>Colors</code> can be used in drawing and filling
+ commands. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: const Color <b>default_background</b><var><a name="index-default_005fbackground-216"></a></var><br>
+ <blockquote><p>The default background color.  Equal to <code>white</code> per default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>background_color</b><var><a name="index-background_005fcolor-217"></a></var><br>
+ <blockquote><p>Points to <code>default_background</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>default_color</b><var><a name="index-default_005fcolor-218"></a></var><br>
+ <blockquote><p>Points to <code>black</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>help_color</b><var><a name="index-help_005fcolor-219"></a></var><br>
+ <blockquote><p>Points to <code>green</code> by default. 
+ </p></blockquote></div>
+ 
+    <p>The following vectors of pointers to <code>Color</code> can be used in the
+ drawing and filling functions for <code>Solid</code>
+ (see <a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>).
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>default_color_vector</b><var><a name="index-default_005fcolor_005fvector-220"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>default_color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>help_color_vector</b><var><a name="index-help_005fcolor_005fvector-221"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>help_color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>background_color_vector</b><var><a name="index-background_005fcolor_005fvector-222"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>background_color</code>. 
+ </p></blockquote></div>
+ 
+ <!-- io.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Projections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Projections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Projections.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Projections.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,72 ----
+ <html lang="en">
+ <head>
+ <title>Namespace Projections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces" title="Picture Output Namespaces">
+ <link rel="prev" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces" title="Picture Output Namespaces">
+ <link rel="next" href="Namespace-Sorting.html#Namespace-Sorting" title="Namespace Sorting">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Namespace-Projections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">21.8.1.1 Namespace Projections</h5>
+ 
+ <p>The namespace <code>Projections</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <div class="defun">
+ &mdash; Constant: const unsigned short <b>PERSP</b><var><a name="index-PERSP-325"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_X_Y</b><var><a name="index-PARALLEL_005fX_005fY-326"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_X_Z</b><var><a name="index-PARALLEL_005fX_005fZ-327"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_Z_Y</b><var><a name="index-PARALLEL_005fZ_005fY-328"></a></var><br>
+ &mdash; Constant: const unsigned short <b>AXON</b><var><a name="index-AXON-329"></a></var><br>
+ &mdash; Constant: const unsigned short <b>ISO</b><var><a name="index-ISO-330"></a></var><br>
+ <blockquote><p>These constants can be used for the <var>projection</var> argument in
+ <code>Picture::output()</code>, described in
+ <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>,
+ below. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Sorting.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Sorting.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Namespace-Sorting.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Namespace-Sorting.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Namespace Sorting - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces" title="Picture Output Namespaces">
+ <link rel="prev" href="Namespace-Projections.html#Namespace-Projections" title="Namespace Projections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Namespace-Sorting"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">21.8.1.2 Namespace Sorting</h5>
+ 
+ <p>The namespace <code>Sorting</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <div class="defun">
+ &mdash; Constant: const unsigned short <b>NO_SORT</b><var><a name="index-NO_005fSORT-331"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MAX_Z</b><var><a name="index-MAX_005fZ-332"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MIN_Z</b><var><a name="index-MIN_005fZ-333"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MEAN_Z</b><var><a name="index-MEAN_005fZ-334"></a></var><br>
+ <blockquote><p>These constants can be used for the <var>sort_value</var> argument in
+ <code>Picture::output()</code>, described in
+ <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>,
+ below. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/No-Input-Routine.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/No-Input-Routine.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/No-Input-Routine.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>No Input Routine - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Caveats.html#Caveats" title="Caveats">
+ <link rel="prev" href="Accuracy.html#Accuracy" title="Accuracy">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="No-Input-Routine"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Accuracy.html#Accuracy">Accuracy</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Caveats.html#Caveats">Caveats</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">1.5.2 No Input Routine</h4>
+ 
+ <p>3DLDF does not yet include a routine for reading input
+ files.   This means  that user  code must  be written  in C++
+ ,
+ compiled, and  linked with  the rest of the program.  I admit,
+ this is  not ideal, and writing an input routine for user code
+ is one of the next things I plan to add to 3DLDF.
+ 
+    <p>I plan to use Flex and Bison to write the input routine.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ The syntax of the input code should be as close
+ as possible  to that  of MetaPost, while taking account of the
+ differences between  MetaPost and 3DLDF.
+ 
+    <p>For the present, however, the  use of 3DLDF is limited to
+ those who  feel comfortable  using  C++
+  and compiling  and
+ relinking programs.  Please don't be put off by this!  It's not so
+ difficult, and <samp><span class="command">make</span></samp> does most of the work of recompiling and
+ running 3DLDF.  See <a href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>, for more
+ information.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Flex is a program for generating text scanners and Bison is a
+ parser generator.  They are available from
+ <a href="http://www.gnu.org">http://www.gnu.org</a>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Labels.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Labels.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Labels.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Outputting Labels - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link rel="prev" href="Copying-Labels.html#Copying-Labels" title="Copying Labels">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Labels"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Copying-Labels.html#Copying-Labels">Copying Labels</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Label-Reference.html#Label-Reference">Label Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">20.3 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>const Focus&amp; f, const unsigned short proj, real factor, const Transform&amp; t</var>)<var><a name="index-output-300"></a></var><br>
+ <blockquote><p>Writes MetaPost code for the labels to <code>out_stream</code>. 
+ It is called in <code>Picture::output()</code>
+ (see <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>). 
+ Users should never need to call this function directly.
+ 
+         <p>When <code>Picture::output()</code> is
+ invoked, the MetaPost code for <code>Labels</code> is written to <code>out_stream</code>
+ after the code for the drawing and filling commands.  This prevents the
+ <code>Labels</code> from being covered up.  However, they can still be covered
+ by other <code>Labels</code>, or by <code>Shapes</code> or <code>Labels</code> from
+ subsequent invocations of <code>Picture::output()</code> within the same
+ figure (see <a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>, for descriptions of <code>beginfig() and
+ endfig()</code>). 
+ </p></blockquote></div>
+ 
+ <!-- picture.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,123 ----
+ <html lang="en">
+ <head>
+ <title>Outputting Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Querying-Paths.html#Querying-Paths" title="Querying Paths">
+ <link rel="next" href="Path-Intersections.html#Path-Intersections" title="Path Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Path-Intersections.html#Path-Intersections">Path Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Paths.html#Querying-Paths">Querying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.16 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>project</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-project-625"></a></var><br>
+ <blockquote><p>Calls <code>Point::project(</code><var>f</var><code>, </code><var>proj</var><code>, </code><var>factor</var><code>)</code> on the
+ <code>Points</code> on the <code>Path</code>. 
+ If <code>Point::project()</code> fails (i.e., returns <code>false</code>), for any of
+ the <code>Points</code>, this function
+ returns <code>false</code>.  Otherwise, it returns <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-626"></a></var><br>
+ <blockquote><p>Checks that the <code>Points</code> on <code>points</code> can be projected using
+ the values for <var>f</var>, <var>proj</var>, and <var>factor</var>.  If they can, a
+ <code>vector&lt;Shape*&gt;</code> containing only <code>this</code> is returned.  Called in
+ <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-627"></a></var><br>
+ <blockquote><p>Sets the appropriate elements in <code>projective_extremes</code> to the
+ minimum and maximum values of the x, y, and z-coordinates of
+ the <code>Points</code> on the <code>Path</code>.  Used in <code>Picture::output()</code>
+ for determining whether a <code>Path</code> can be output using the arguments
+ passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-628"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>.  Used in <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-629"></a></var><br>
+ &mdash; <code>const</code> virtual function: real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-630"></a></var><br>
+ &mdash; <code>const</code> virtual function: real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-631"></a></var><br>
+ <blockquote><p>These functions return the minimum, mean, or maximum value,
+ respectively, of the
+ z-coordinates of the <code>Points</code> on the <code>Path</code>. 
+ Used in the surface hiding algorithm in <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-632"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>. 
+ Sets <code>do_output</code> to
+ <code>false</code>, if the <code>Path</code> cannot  be output using the arguments
+ passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>unsuppress_output</b> (<var>void</var>)<var><a name="index-unsuppress_005foutput-633"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  Resets <code>do_output</code> to
+ <code>true</code> after <code>output()</code> is called on the <code>Shapes</code> on
+ <code>shapes</code> in a <code>Picture</code>, so that the <code>Path</code> can be output
+ if <code>Picture::output()</code> is called again, with arguments that allow
+ the <code>Path</code> to be output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>output</b> (<var>void</var>)<var><a name="index-output-634"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  Writes the MetaPost code to
+ <code>out_stream</code> for drawing, filling, filldrawing, undrawing,
+ unfilling, or unfilldrawing the <code>Path</code>, if the latter was
+ projectable using the arguments passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Pictures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Pictures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Pictures.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Pictures.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,60 ----
+ <html lang="en">
+ <head>
+ <title>Outputting Pictures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Showing-Pictures.html#Showing-Pictures" title="Showing Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Pictures"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.8 Outputting</h3>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <li><a accesskey="2" href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Points.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,137 ----
+ <html lang="en">
+ <head>
+ <title>Outputting Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Showing-Points.html#Showing-Points" title="Showing Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Points"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Points.html#Showing-Points">Showing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.21 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Non-member function: ostream&amp; <b>operator&lt;&lt;</b> (<var>ostream&amp; o, Point&amp; p</var>)<var><a name="index-operator_003c_003c-463"></a></var><br>
+ <blockquote><p>Used in <code>Path::output()</code> for writing
+ the x and y values of the <code>projective_coordinates</code> of <code>Points</code> to
+ <code>out_stream</code>.  See <a href="Outputting-Paths.html#Outputting-Paths">Path Reference; Outputting</a>. 
+ This is a low-level function that ordinary users should never have to
+ invoke directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>void</var>)<var><a name="index-output-464"></a></var><br>
+ <blockquote><p>Writes the MetaPost code for drawing or undrawing a <code>Point</code> to
+ <code>out_stream</code>.  Called by <code>Picture::output()</code>, when a
+ <code>Shape</code> on the <code>Picture</code> is a <code>Point</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-465"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>false</code>, which causes a <code>Point</code>
+ not to be output.  This function is called in
+ <code>Picture::output()</code>, when a <code>Point</code> cannot be projected. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: virtual <b>void</b><var> unsuppress_output </var>(<var>void</var>)<var><a name="index-void-466"></a></var><br>
+ <blockquote><p>Resets <code>do_output</code> to <code>true</code>, so that a <code>Point</code> can
+ potentially be output, if <code>Picture::output()</code> is called again for
+ the <code>Picture</code> the <code>Point</code> is on. 
+ This function is called in
+ <code>Picture::output()</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: <code>vector&lt;shape*&gt;</code> <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-467"></a></var><br>
+ <blockquote><p>Attempts to project the <code>Point</code>
+ using the arguments passed to <code>Picture::output()</code>, which calls this
+ function.  If <code>extract()</code> succeeds,
+ it returns a <code>vector&lt;shape*&gt;</code> containing only the <code>Point</code>. 
+ Otherwise, it returns an empty <code>vector&lt;shape*&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-468"></a></var><br>
+ <blockquote><p>Sets &ldquo;extreme&rdquo; values
+ for x, y, and z in <code>projective_coordinates</code>.  This
+ is, of course, trivial for
+ <code>Points</code>, because they only have one x, y and z-coordinate. 
+ So the maxima and minima for each coordinate are always the same. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual inline <code>const</code> function: <code>valarray &lt;real&gt;</code> <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-469"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual <code>const</code> function: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-470"></a></var><br>
+ &mdash; Virtual <code>const</code> function: real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-471"></a></var><br>
+ &mdash; Virtual <code>const</code> function: real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-472"></a></var><br>
+ <blockquote><p>These functions return the minimum, maximum, and mean z-value of the
+ <code>Point</code>. 
+ <code>get_minimum_z()</code> returns <code>projective_extremes[4]</code>,
+ <code>get_maximum_z()</code> returns <code>projective_extremes[5]</code>, and
+ <code>get_mean_z()</code> returns
+ <code>(projective_extremes[4] + projective_extremes[5]) / 2</code>. 
+ However, since a <code>Point</code> has only one z-coordinate
+ (from <code>world_coordinates</code>), these values will all be the same.
+ 
+         <p>These functions are pure virtual functions in <code>Shape</code>, and are
+ called on <code>Points</code> through pointers to <code>Shape</code>.  Therefore,
+ they must be consistent with the versions for other types derived from
+ <code>Shape</code>.  See <a href="Outputting-Shapes.html#Outputting-Shapes">Shape Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <!-- focus.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Shapes.html
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+ <html lang="en">
+ <head>
+ <title>Outputting Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Showing-Shapes.html#Showing-Shapes" title="Showing Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Shapes"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Shapes.html#Showing-Shapes">Showing Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.10 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>output</b> (<var>void</var>)<var><a name="index-output-253"></a></var><br>
+ <blockquote><p>Called by <code>Picture::output()</code> for writing MetaPost code to
+ <code>out_stream</code> for a <code>Shape</code> pointed to by a pointer on the
+ <code>vector&lt;Shape*&gt; shapes</code> belonging to the <code>Picture</code>.  Such
+ a <code>Shape</code> will have been created by a drawing or filling
+ function. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-254"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  It determines whether a
+ <code>Shape</code> can be output.  If it can, and an <code>output()</code> function
+ for the type of the <code>Shape</code> exists, a <code>vector&lt;Shape*&gt;</code>
+ containing a pointer to the <code>Shape</code> is returned.
+ 
+         <p>On the other
+ hand, it is possible to define a type derived from <code>Shape</code>, without
+ an <code>output()</code> function of its own, and not derived from a type that
+ has one.  It may then consist of one or more objects of types that do
+ have <code>output()</code> functions.  In this case, the <code>vector&lt;Shape*&gt;</code>
+ returned by <code>extract()</code> will contain pointers to all of these
+ subsidiary <code>Shapes</code>, and <code>Picture::output()</code> will treat them
+ as independent objects.  In particular, if any one of them cannot be
+ projected using the arguments passed to <code>Picture::output()</code>, this
+ will have no effect on whether the others are outputted or not.
+ 
+         <p>Currently, there are no <code>Shapes</code> without an <code>output()</code>
+ function, either belonging to the class, or inherited.  However, it's
+ useful to be able to define <code>Shapes</code> in this way, so that they can
+ be tested without having to define an <code>output()</code> function first. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-255"></a></var><br>
+ <blockquote><p>Sets the values of <code>projective_extremes</code> for the <code>Shape</code>. 
+ This is needed in <code>Picture::output()</code> for determining the order in
+ which objects are output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual functions: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-256"></a></var><br>
+ &mdash; : real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-257"></a></var><br>
+ &mdash; : real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-258"></a></var><br>
+ <blockquote><p>These functions return the minimum, maximum, and mean z-value
+ respectively of the projected <code>Points</code> belonging to
+ the <code>Shape</code>, i.e., from <code>projective_extremes</code>.  The values for
+ the <code>Shapes</code> on the <code>Picture</code> are used for determining the
+ order in which they are output
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-259"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-260"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>false</code>.  This function is called in
+ <code>Picture::output()</code>, if a <code>Shape</code> on a <code>Picture</code> cannot
+ be output using the arguments passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>unsuppress_output</b> (<var>void</var>)<var><a name="index-unsuppress_005foutput-261"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>true</code>.  Called in
+ <code>Picture::output()</code> after <code>output()</code> is called on the <code>Shapes</code>. 
+ This way, output of <code>Shapes</code> that couldn't be output when
+ <code>Picture::output()</code> was called with a particular set of arguments
+ won't necessarily be suppressed when
+ <code>Picture::output()</code> is called again with different arguments. 
+ </p></blockquote></div>
+ 
+    <p>f<!-- transfor.texi -->
+ 
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Outputting-Solids.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Outputting-Solids.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,113 ----
+ <html lang="en">
+ <head>
+ <title>Outputting Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids" title="Applying Transformations to Solids">
+ <link rel="next" href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids" title="Drawing and Filling Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Outputting-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.12 Outputting</h3>
+ 
+ <p>The functions in this section are are called, directly or indirectly, by
+ <code>Picture::output()</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>.
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>output</b> (<code>void</code>)<var><a name="index-output-819"></a></var><br>
+ <blockquote><p>Writes the MetaPost code for drawing, filling, filldrawing, undrawing,
+ unfilling, or unfilldrawing the <code>Solid</code> to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<code>void</code>)<var><a name="index-suppress_005foutput-820"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Sets <code>do_output</code> to <code>false</code>, if the
+ <code>Solid</code> cannot be projected using a particular set of arguments to
+ <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>unsuppress_output</b> (<code>void</code>)<var><a name="index-unsuppress_005foutput-821"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Resets <code>do_output</code> to <code>true</code>,
+ so that the <code>Solid</code> will be tested for projectability again, if the
+ <code>Picture</code> it's on is output again. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-822"></a></var><br>
+ <blockquote><p>Tests whether all of the <code>Shapes</code> belonging to the <code>Solid</code> are
+ projectable, using the arguments passed to <code>output()</code>.  If it is,
+ this function returns a
+ vector of pointers to <code>Shape</code> containing a single pointer to
+ the <code>Solid</code>.  If not, an empty vector is returned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<code>void</code>)<var><a name="index-set_005fextremes-823"></a></var><br>
+ <blockquote><p>Sets <code>projective_extremes</code> to contain the maximum and minimum
+ values for the x, y, and z-coordinates of the <code>Points</code> on the
+ <code>Shape</code>.  Used for determining projectability of a <code>Solid</code>
+ using a particular set of arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<code>void</code>)<var><a name="index-get_005fextremes-824"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: real <b>get_minimum_z</b> (<code>void</code>)<var><a name="index-get_005fminimum_005fz-825"></a></var><br>
+ &mdash; : real <b>get_maximum_z</b> (<code>void</code>)<var><a name="index-get_005fmaximum_005fz-826"></a></var><br>
+ &mdash; : real <b>get_mean_z</b> (<code>void</code>)<var><a name="index-get_005fmean_005fz-827"></a></var><br>
+ <blockquote><p>Returns the minimum, maximum, or mean z-value, respectively, of the
+ <code>Points</code> belonging to the <code>Solid</code>. 
+ Used for surface hiding. 
+ See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Parallel-Projections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Parallel-Projections.html
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--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Parallel-Projections.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,132 ----
+ <html lang="en">
+ <head>
+ <title>Parallel Projections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Projections.html#Projections" title="Projections">
+ <link rel="prev" href="Projections.html#Projections" title="Projections">
+ <link rel="next" href="The-Perspective-Projection.html#The-Perspective-Projection" title="The Perspective Projection">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Parallel-Projections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="The-Perspective-Projection.html#The-Perspective-Projection">The Perspective Projection</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Projections.html#Projections">Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Projections.html#Projections">Projections</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">9.1.1 Parallel Projections</h4>
+ 
+ <p>When a <code>Picture</code> is projected onto the x-y plane, the
+ x and y-values from the <code>world_coordinates</code> of the <code>Points</code>
+ belonging to the objects on the
+ <code>Picture</code> are copied to
+ their <code>projective_coordinates</code>, which are
+ used in the MetaPost code written to <code>out_stream</code>. 
+ If a <code>Picture</code> <var>p</var> contains an object in the x-y plane,
+ or in a plane parallel to the x-y plane, then
+ the result of <var>p</var><code>.output(Projections::PARALLEL_X_Y)</code> is more-or-less
+ equivalent to just using MetaPost without 3DLDF.
+ 
+ <pre class="example">     Rectangle r(origin, 3, 3, 90);
+      Circle c(origin, 3, 90);
+      c *= r.shift(0, 0, 5);
+      r.draw();
+      c.draw();
+      current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF53.png"
+ alt="[Figure 53. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 53. 
+ <br>
+ </p>
+ 
+    <p>If the objects do not lie in the x-y plane, or a plane parallel to the
+ x-y plane, then the projection will be distorted:
+ 
+ <pre class="example">     current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF54.png"
+ alt="[Figure 54. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 54. 
+ <br>
+ </p>
+ 
+    <p><code>Picture::output()</code> can be called with an additional <code>real</code>
+ argument <var>factor</var> for magnifying or shrinking the <code>Picture</code>.
+ 
+ <!-- !! TO DO:  Try using the code above and removing here.  Change -->
+ <!-- factor, if necessary.  LDF 2003.08.15. -->
+ <pre class="example">     Rectangle r(origin, 4, 4, 90, 60);
+      Circle c(origin, 4, 90, 60);
+      c *= r.shift(0, 0, 5);
+      r.filldraw(black, gray);
+      c.unfilldraw(black);
+      current_picture.output(Projections::PARALLEL_X_Y, .5);
+      current_picture.shift(2.5);
+      current_picture.output(Projections::PARALLEL_X_Y);
+      current_picture.shift(1);
+      current_picture.output(Projections::PARALLEL_X_Y, 2);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF55.png"
+ alt="[Figure 55. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 55. 
+ <br>
+ </p>
+ 
+    <p>Parallel projection onto the x-z and z-y planes are completely analogous
+ to parallel projection onto the x-y plane.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Constructors-and-Setting-Functions.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Path Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Path-Data-Members.html#Path-Data-Members" title="Path Data Members">
+ <link rel="next" href="Path-Destructor.html#Path-Destructor" title="Path Destructor">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Path-Destructor.html#Path-Destructor">Path Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Path</b> (<var>void</var>)<var><a name="index-Path-543"></a></var><br>
+ <blockquote><p>Creates an empty <code>Path</code> with no
+ <code>Points</code> and no connectors. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-Path-544"></a></var><br>
+ <blockquote><p>Creates a line (more precisely, a line segment) between <var>p0</var>
+ and <var>p1</var>.  The single
+ connector between the two <code>Points</code> is set to <code>"--"</code> and the
+ data member <code>line_switch</code> (of type <code>bool</code>) is set to
+ <code>true</code>.  There are certain operations on <code>Paths</code> that are only
+ applicable to lines, so it's necessary to store the information that a
+ <code>Path</code> is a line.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+      <pre class="example">          Point A(-2, -2.5, -1);
+           Point B(3, 2, 2.5)
+           Path p(A, B);
+           p.show("p:");
+           -| p:
+              (-2, -2.5, -1) -- (3, 2, 2.5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF110.png"
+ alt="[Figure 110. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 110. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-set-545"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+      <pre class="example">          Point P0(1, 2, 3);
+           Point P1(3.5, -12, 75);
+           Path q;
+           q.set(P0, P1);
+           q.show("q:");
+           -| q:
+              (1, 2, 3) -- (3.5, -12, 75);
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>string connector, bool cycle, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-Path-546"></a></var><br>
+ <blockquote><p>For <code>Paths</code> with an arbitrary number of <code>Points</code>
+ and one type of connector.
+ 
+         <p><var>connector</var> is passed unchanged to <code>out_file</code>, so it
+ must be a valid connector in MetaPost.
+ 
+         <p><var>cycle</var> indicates whether the <code>Path</code> is a cycle or not. 
+ <code>cycle_switch</code> is set to <var>cycle</var>. 
+ See <a href="Path-Data-Members.html#Path-Data-Members">Path Reference; Data Members</a>. 
+ The filling and unfilling functions
+ only work for
+ <code>Paths</code> that are cycles. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ If a <code>Path</code> is a cycle, it is up to the user to make sure that it
+ has sensible <code>Point</code> and connector values;  3DLDF doesn't check
+ them.  If they are not sensible, for instance, if the <code>Path</code>
+ crosses itself, and you try to fill it, this will cause an error in
+ MetaPost.  It is possible that a <code>Path</code> will be &ldquo;sensible&rdquo; in
+ some projections and not in others, although I have not tested this.
+ 
+         <p><var>p</var> is a pointer to the first <code>Point</code> that should go onto the
+ <code>Path</code>. 
+ The ellipsis points (<code>...</code>) represent an arbitrary number of
+ pointers to <code>Points</code> that should go onto the <code>Path</code>. 
+ The final
+ argument must be <code>0</code>,
+ which is interpreted by the C++
+  compiler as the null
+ pointer.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+         <p>It is admittedly a bit
+ awkward to have to type &ldquo;<code>&amp;p0</code>&rdquo; rather than &ldquo;<code>p0</code>&rdquo;, and
+ I have frequently forgotten to do it, which causes a compiler error,
+ but all of the arguments must be pointers in order to be able to use 0 to
+ indicate the end of the argument list.  Convenience in typing function
+ calls is not a high priority in 3DLDF, because once I've written
+ an input routine, these function calls should be generated
+ automatically.  It will be more important to define a convenient syntax
+ for the input routine.
+ 
+      <pre class="example">          Point P0;
+           Point P1(2);
+           Point P2(2,2);
+           Point P3(0,2);
+           Path p("..", true, &amp;P0, &amp;P1, &amp;P2, &amp;P3, 0);
+           p.draw();
+           
+           
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF111.png"
+ alt="[Figure 111. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 111. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>string connector, bool cycle, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-set-547"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+      <pre class="example">          Point P[4];
+           P[0].set(2, 1, 3);
+           P[3] = P[2] =  P[1] = P[0];
+           P[3] *= P[2] *=  P[1].rotate(3, 12, 18);
+           P[3] *= P[2].shift(-2, -1, 3);
+           P[3].shear(1.5, .5, 3.5);
+           Path q("...", false, &amp;P[0], &amp;P[1], &amp;P[2], &amp;P[3], 0);
+           q.show("q:");
+           -| q:
+              (2, 1, 3) ... (0.92139, 1.51449, 3.29505) ...
+              (-1.07861, 0.514487, 6.29505) ... (2.84065, -3.26065, 6.29505);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF112.png"
+ alt="[Figure 112. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 112. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>Point* first_point_ptr, char* s, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-Path-548"></a></var><br>
+ <blockquote><p>Constructor for <code>Paths</code> with an arbitrary number of <code>Points</code>
+ and connectors.  The first, required, argument is a pointer to a
+ <code>Point</code>, followed by pointers to <code>char</code> alternating with pointers to
+ <code>Points</code>.<a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>
+ The last argument must be 0, i.e., the null pointer.
+ 
+         <p>There is no need to indicate by means of an argument whether the
+ <code>Path</code> is a cycle or not:  If it is, the last argument before the 0
+ will be a <code>char*</code> (pointer to <code>char</code>), if not, it will be a
+ <code>Point*</code>.  The data member <code>cycle_switch</code> (of type
+ <code>bool</code>) will be set to <code>true</code> or <code>false</code> accordingly.
+ 
+      <pre class="example">          Point A;
+           Point B(2, 0);
+           Point C(3, 2);
+           Point D(1, 3);
+           Path p(&amp;A, "..", &amp;B, "..", &amp;C, "--", &amp;D, "...", 0);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF113.png"
+ alt="[Figure 113. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 113. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>Point *first_point_ptr, string s, Point *p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-set-549"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Path</b> (<var>const Path&amp; p</var>)<var><a name="index-Path-550"></a></var><br>
+ <blockquote><p>Creates a new <code>Path</code>, making it a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Path* <b>create_new&lt;Path&gt;</b> (<var>const Path* p</var>)<var><a name="index-create_005fnew_003cPath_003e-551"></a></var><br>
+ &mdash; : Path* <b>create_new&lt;Path&gt;</b> (<var>const Path&amp; p</var>)<var><a name="index-create_005fnew_003cPath_003e-552"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Paths</code>. 
+ They create a <code>Path</code> on the free store and allocate memory for it using
+ <code>new(Path)</code>.  They return a pointer to the new <code>Path</code>.
+ 
+         <p>If <var>p</var> is a non-zero pointer or a reference,
+ the new <code>Path</code> will be a copy of
+ <var>p</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Path&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+         <p><code>create_new&lt;Path&gt;()</code> is used in the drawing and filling functions
+ for copying a <code>Path</code> and putting the copy onto a <code>Picture</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> It isn't sufficient to check whether a
+ <code>Path</code> consists of only two <code>Points</code> to determine whether it
+ is a line or not, since a connector with &ldquo;<code>curl</code>&rdquo; could cause it
+ to be non-linear.  On the other hand, <code>Paths</code> containing only
+ colinear <code>Points</code> and the connector <code>"--"</code> are perfectly
+ legitimate lines.  I'm in the process of changing all of the code that
+ tests for linearity by checking the value of <code>line_switch</code>, so that
+ it uses <code>is_linear()</code> instead.  When I've done this, it may be
+ possible to eliminate <code>line_switch</code>. 
+ See <a href="Path-Data-Members.html#Path-Data-Members">Path Reference; Data Members</a>, and
+ <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>, p.&nbsp;<!-- /@w -->88.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> Where possible, I prefer to use the C++
+  data
+ type <code>string</code> rather than <code>char*</code>, however it was necessary to
+ use <code>char*</code> here because 0 is not a valid <code>string</code>, even
+ though <code>string</code> may be implemented as <code>char*</code>,
+ and 0 must be a valid argument, since it is needed to indicate the end
+ of the argument list.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Data-Members.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Data-Members.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Path Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="next" href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions" title="Path Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Reference.html#Path-Reference">Path Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>line_switch</b><var><a name="index-line_005fswitch-526"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> was created using the constructor
+ <code>Path(const Point&amp; p0, const Point&amp; p1)</code>, directly or indirectly. 
+ See <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          Point p0;
+           Point p1(1, 1);
+           Point p2(2, 3);
+           Path q0(p0, p1);
+           cout &lt;&lt; q0.get_line_switch();
+           -| 1
+           Path q1;
+           q1 = q0;
+           cout &lt;&lt; q1.get_line_switch();
+           -| 1
+           Path q2 = p0.draw(p1);
+           cout &lt;&lt; q2.get_line_switch();
+           -| 1
+           Path q3("..", false, &amp;p1, &amp;p2, &amp;p0, 0);
+           cout &lt;&lt; q3.get_line_switch();
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF109.png"
+ alt="[Figure 109. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 109. 
+ <br>
+ </p>
+ 
+         <p><a name="index-linear-_0040code_007bPaths_007d-527"></a>Some <code>Path</code> functions only work on <em>linear </em><code>Paths</code>,
+ so it's necessary to be able to distinguish them from non-linear ones. 
+ The function <code>is_linear()</code> should be enough to ensure that all of
+ these functions work, so I plan to make <code>line_switch</code> obsolete
+ soon.  However, at the moment, it's still needed. 
+ See <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>cycle_switch</b><var><a name="index-cycle_005fswitch-528"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> is cyclical, otherwise
+ <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-529"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> was dynamically allocated on the free
+ store.  Otherwise <code>false</code>.  Set to <code>true</code> only in
+ <code>create_new&lt;Path&gt;()</code>, which should be the only way <code>Paths</code> are
+ ever dynamically allocated. 
+ See <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-530"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Set to <code>false</code> if the <code>Path</code>
+ isn't projectable using the arguments passed to
+ <code>Picture::output()</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: signed short <b>fill_draw_value</b><var><a name="index-fill_005fdraw_005fvalue-531"></a></var><br>
+ <blockquote><p>Set in the drawing and filling functions, and
+ used in <code>Path::output()</code>, to determine what MetaPost code to write
+ to <code>out_stream</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ and <a href="Outputting-Paths.html#Outputting-Paths">Path Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: const Color* <b>draw_color</b><var><a name="index-draw_005fcolor-532"></a></var><br>
+ <blockquote><p>Pointer to the <code>Color</code> used if the <code>Path</code> is drawn. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: const Color* <b>fill_color</b><var><a name="index-fill_005fcolor-533"></a></var><br>
+ <blockquote><p>Pointer to the <code>Color</code> used if the <code>Path</code> is filled. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: string <b>dashed</b><var><a name="index-dashed-534"></a></var><br>
+ <blockquote><p>String written to <code>out_stream</code> for the &ldquo;dash pattern&rdquo; in a
+ MetaPost <code>draw</code> or <code>undraw</code> command.  If and only if
+ <code>dashed</code> is not the empty string, &ldquo;<code>dashed</code>
+ &lt;<em>dash pattern</em>&gt;&rdquo; is written to <code>out_stream</code>.
+ 
+         <p>Dash patterns have no meaning inside 3DLDF;  <code>dashed</code>, if
+ non-empty, is written unchanged to <code>out_stream</code>.  I may change this
+ in the future. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: string <b>pen</b><var><a name="index-pen-535"></a></var><br>
+ <blockquote><p>String written to <code>out_stream</code> for the <code>pen</code> to be used in a
+ MetaPost <code>draw</code>, <code>undraw</code>, <code>filldraw</code>, or
+ <code>unfilldraw</code> command.  If and only if <code>pen</code> is not the
+ empty string, &ldquo;<code>withpen</code> &lt;<small class="dots">...</small>&gt;&rdquo; is written to
+ <code>out_stream</code>.
+ 
+         <p>Pens have no meaning inside 3DLDF;  <code>pen</code>, if
+ non-empty, is written unchanged to <code>out_stream</code>.  I may change this
+ in the future. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>arrow</b><var><a name="index-arrow-536"></a></var><br>
+ <blockquote><p>Indicates whether an arrow should be drawn when outputting a
+ <code>Path</code>.  Set to <code>true</code> on a <code>Path</code> created on the free
+ store and put onto a <code>Picture</code> by <code>drawarrow()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-537"></a></var><br>
+ <blockquote><p>Contains the maxima and minima of the x, y, and z-coordinates of the
+ <em>projections</em> of <code>Points</code> on a <code>Path</code> using a particular
+ <code>Focus</code>.  Set in <code>set_extremes()</code> and used in
+ <code>Picture::output()</code> for surface hiding. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: vector&lt;Point*&gt; <b>points</b><var><a name="index-points-538"></a></var><br>
+ <blockquote><p>Pointers to the <code>Points</code> on the <code>Path</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: vector&lt;string&gt; <b>connectors</b><var><a name="index-connectors-539"></a></var><br>
+ <blockquote><p>The connectors between the <code>Points</code> on the <code>Path</code>.  Connectors
+ are simply <code>strings</code> in 3DLDF, they are written unchanged to
+ <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: const Color* <b>help_color</b><var><a name="index-help_005fcolor-540"></a></var><br>
+ <blockquote><p>Pointer to a <code>const Color</code>, which becomes the default for
+ <code>draw_help()</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+         <p>Please note that <code>help_color</code> is a pointer to a
+ <code>const Color</code>, not a <code>const</code> pointer to a <code>Color</code> or a
+ <code>const</code> pointer to a <code>const Color</code>!  It's easy to get confused
+ by the syntax for these types of pointers.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: string <b>help_dash_pattern</b><var><a name="index-help_005fdash_005fpattern-541"></a></var><br>
+ <blockquote><p>The default dash pattern for <code>draw_help()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: bool <b>do_help_lines</b><var><a name="index-do_005fhelp_005flines-542"></a></var><br>
+ <blockquote><p><code>true</code> if help lines should be output, otherwise <code>false</code>. 
+ If <code>false</code>, a call to <code>draw_help()</code> does not cause a copy of
+ the <code>Path</code> to be created and put onto a <code>Picture</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>, p.&nbsp;<!-- /@w -->96.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Destructor.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Destructor.html
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+ <html lang="en">
+ <head>
+ <title>Path Destructor - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions" title="Path Constructors and Setting Functions">
+ <link rel="next" href="Path-Operators.html#Path-Operators" title="Path Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Destructor"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Path-Operators.html#Path-Operators">Path Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.3 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Path</b> (<code>void</code>)<var><a name="index-g_t_007ePath-553"></a></var><br>
+ <blockquote><p>All of the <code>Points</code> on a <code>Path</code> are created by
+ <code>create_new&lt;Point&gt;()</code>, which allocates them dynamically on
+ the free store.  Therefore, the destructor calls <code>delete()</code> on all
+ of the pointers on <code>points</code>.  Following this, it calls
+ <code>points.clear()</code> and <code>connectors.clear()</code>. 
+ <code>draw_color</code> and <code>fill_color</code> may or may not have been
+ allocated on the free store, so <code>~Path()</code> checks this first, and
+ deletes them, if they were.  Then, it sets them to 0. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Intersections.html
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--- 1,103 ----
+ <html lang="en">
+ <head>
+ <title>Path Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Outputting-Paths.html#Outputting-Paths" title="Outputting Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Intersections"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.17 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool_point <b>intersection_point</b> (<var>const Path&amp; p, const bool trace</var>)<var><a name="index-intersection_005fpoint-635"></a></var><br>
+ <blockquote><p>Finds the intersection point, if any, of two linear <code>Paths</code>. 
+ Let <code>bp</code> be the <code>bool_point</code> returned by
+ this function.  <code>bp.pt</code> will contains the
+ intersection point, if it exists.  If not, it will contain
+ <code>INVALID_POINT</code>.  If the intersection point exists and lies on both
+ of the line segments represented by the <code>Path</code> and <code>p</code>,
+ <code>bp.b</code> will be <code>true</code>, otherwise, <code>false</code>.
+ 
+         <p>This function calls <code>Point::intersection_points()</code>, passing the first
+ and last <code>Points</code> on <code>*this</code> and <var>p</var> as its arguments.  If
+ the <var>trace</var> argument is <code>false</code>, the version of
+ <code>Point::intersection_points()</code> that finds the intersection point by
+ means of a vector calculation is used.  If it's <code>true</code>, the version
+ that finds the intersection point of the traces of the lines on the
+ major planes is used. 
+ See <a href="Point-Intersections.html#Point-Intersections">Point Reference; Intersections</a>.
+ 
+      <pre class="example">          Point A(-1, -1, -1);
+           Point B(1, 1, 1);
+           Path p0(A, B);
+           Point C(-2, 1, 1);
+           Point D(1.75, 0.25, 0.25);
+           Path p1(C, D);
+           bool_point bp = p0.intersection_point(p1);
+           bp.pt.dotlabel("$i$");
+           bp.pt.show("bp.pt:");
+           -| bp.pt: (0.5, 0.5, 0.5)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF138.png"
+ alt="[Figure 138. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 138. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- polygon.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Operators.html
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+ <html lang="en">
+ <head>
+ <title>Path Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Path-Destructor.html#Path-Destructor" title="Path Destructor">
+ <link rel="next" href="Appending-to-Paths.html#Appending-to-Paths" title="Appending to Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Appending-to-Paths.html#Appending-to-Paths">Appending to Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Destructor.html#Path-Destructor">Path Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-554"></a></var><br>
+ <blockquote><p>Calls <code>Point::operator*=(</code><var>t</var><code>)</code> on each of the <code>Points</code>
+ on the <code>Path</code>. 
+ See <a href="Point-Operators.html#Point-Operators">Point Reference; Operators</a>. 
+ This has the effect of
+ transforming the entire <code>Path</code> by <var>t</var>.  Please note that
+ <code>Path</code> does not have a <code>transform</code> data member of its own. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator+=</b> (<var>const Point&amp; pt</var>)<var><a name="index-operator_002b_003d-555"></a></var><br>
+ <blockquote><p>Copies <var>pt</var> and pushes a pointer to the copy onto
+ <code>points</code>.  The last connector
+ in the <code>Path</code> will be used to connect the new <code>Point</code> and the
+ previous one.
+ 
+      <pre class="example">          Point A(1, 2, 3);
+           Point B(3, 4, 5);
+           Path q;
+           q += A;
+           q += B;
+           q.show("q:");
+           -| q:
+              (1, 2, 3) -- (3, 4, 5);
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>operator+</b> (<var>const Point&amp; pt</var>)<var><a name="index-operator_002b-556"></a></var><br>
+ <blockquote><p>Copies the <code>Path</code> and <var>pt</var>, and pushes a pointer to the copy of
+ <var>pt</var> onto <code>points</code> in the new <code>Path</code>.  The
+ last connector in the new <code>Path</code> will be used to connect the new
+ <code>Point</code> and the previous one.  The <code>Path</code> remains unchanged. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator&amp;=</b> (<var>const Path&amp; pa</var>)<var><a name="index-operator_0026_003d-557"></a></var><br>
+ <blockquote><p>Concatenates two <code>Paths</code>.  The result is assigned to <code>*this</code>. 
+ Neither <code>*this</code> nor <var>pa</var> may be cyclical, i.e.,
+ <code>cycle_switch</code> must be <code>false</code> for both <code>Paths</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>operator&amp;</b> (<var>const Path&amp; pa</var>)<var><a name="index-operator_0026-558"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> representing the concatenation of <code>*this</code> and
+ <var>pa</var>.  <code>*this</code> remains unchanged. 
+ Neither <code>*this</code> nor <var>pa</var> may be cyclical, i.e.,
+ <code>cycle_switch</code> must be <code>false</code> for both <code>Paths</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator+=</b> (<var>const string s</var>)<var><a name="index-operator_002b_003d-559"></a></var><br>
+ <blockquote><p>Pushes <var>s</var> onto <code>connectors</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Path-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Path-Reference.html
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+ <html lang="en">
+ <head>
+ <title>Path Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="next" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Path-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">26 Path Reference</h2>
+ 
+ <p><a name="index-Path-525"></a>Class <code>Path</code> is defined in <samp><span class="file">paths.web</span></samp>. 
+ It is derived from <code>Shape</code> using <code>protected</code> derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a>
+ <li><a accesskey="2" href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Path-Destructor.html#Path-Destructor">Path Destructor</a>
+ <li><a accesskey="4" href="Path-Operators.html#Path-Operators">Path Operators</a>
+ <li><a accesskey="5" href="Appending-to-Paths.html#Appending-to-Paths">Appending to Paths </a>
+ <li><a accesskey="6" href="Copying-Paths.html#Copying-Paths">Copying Paths</a>
+ <li><a accesskey="7" href="Clearing-Paths.html#Clearing-Paths">Clearing Paths </a>
+ <li><a accesskey="8" href="Modifying-Paths.html#Modifying-Paths">Modifying Paths </a>
+ <li><a accesskey="9" href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>
+ <li><a href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>
+ <li><a href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>
+ <li><a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>
+ <li><a href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a>
+ <li><a href="Showing-Paths.html#Showing-Paths">Showing Paths</a>
+ <li><a href="Querying-Paths.html#Querying-Paths">Querying Paths</a>
+ <li><a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a>
+ <li><a href="Path-Intersections.html#Path-Intersections">Path Intersections</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,114 ----
+ <html lang="en">
+ <head>
+ <title>Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points" title="Drawing and Labeling Points">
+ <link rel="next" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">6 Paths</h2>
+ 
+ <p><a name="index-Path-50"></a><a name="index-paths-51"></a><a name="index-connectors-52"></a><code>Points</code> alone are not enough for making useful drawings.  The next
+ step is to combine them into <code>Paths</code>, which are similar to
+ Metafont's <b>paths</b>, except that they are three-dimensional. 
+ A <code>Path</code> consists of a number of <code>Points</code> and <code>strings</code>
+ representing the <dfn>connectors</dfn>.  The latter are not processed by
+ 3DLDF, but are passed unchanged to the output file.  They must be valid
+ connectors for MetaPost, e.g.:
+ 
+    <p><a name="index-curl-53"></a><a name="index-tension-54"></a><a name="index-controls-55"></a><a name="index-control-points-56"></a>
+ <pre class="example">     <tt>..</tt>
+      <tt>...</tt>
+      <tt>--</tt>
+      <tt>---</tt>
+      <tt>&amp;</tt>
+      <tt>curl{2}..</tt>
+      <tt>{dir 60}..</tt>
+      <tt>{z1 - z2}..</tt>
+      <tt>.. tension 1 and 1.5..</tt>
+      <tt>..controls z1 and z2..</tt>
+ </pre>
+    <p>Usually, it will only make sense to use <tt>..</tt> or <tt>&ndash;</tt>, and not
+ <tt>...</tt>, <tt>&mdash;</tt>, <tt>tension</tt>, <tt>curl</tt>, <tt>controls</tt>, or any of the
+ other possibilities, in <code>Paths</code>, unless
+ you are sure that they will only be viewed with no foreshortening due to
+ the perspective
+ projection.  This can be the case, when a <code>Path</code> lies in a plane
+ parallel to one of the major planes, and is projected using parallel
+ projection onto that plane.  Otherwise,
+ the result of using these connectors is likely to be unsatisfactory, because
+ MetaPost performs its calculations based purely on the two-dimensional
+ values of the points in the perspective projection. 
+ While the <code>Points</code> on the <code>Path</code> will be projected correctly,
+ the course of the <code>Path</code> between these <code>Points</code> is likely to
+ differ, depending on the values of the <code>Focus</code>
+ used (see <a href="Focuses-Getstart.html#Focuses-Getstart">Focuses</a>), so that
+ different views of the same <code>Path</code> may well be mutually
+ inconsistent. 
+ This problem doesn't arise with &ldquo;<tt>&ndash;</tt>&rdquo;, since the perspective
+ projection does not &ldquo;unstraighten&rdquo; straight lines,
+ but it does with &ldquo;<tt>..</tt>&rdquo;, even without <tt>tension</tt>, <tt>curl</tt>,
+ or <tt>controls</tt>. 
+ The solution is to use enough <code>Points</code>, since a greater number of
+ <code>Points</code> on a <code>Path</code> tends to reduce the number
+ of possible courses through the <code>Points</code>.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Declaring-and-Initializing-Paths.html#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>
+ <li><a accesskey="2" href="Drawing-and-Filling-Paths-Intro.html#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> I believe that
+ counter-examples could probably constructed, but for the most common
+ cases, the principle applies.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Pattern-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Pattern-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Pattern-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Pattern-Reference.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Pattern Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="next" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Pattern-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">33 Pattern Reference</h2>
+ 
+ <p>There is no currently no class &ldquo;<code>Pattern</code>&rdquo;. 
+ If it turns out to be
+ useful for this purpose, I will define a <code>Pattern</code> class, and
+ perhaps additional derived classes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Plane-Tesselations.html#Plane-Tesselations">Plane Tesselations</a>
+ <li><a accesskey="2" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Performing-Transformations-on-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Performing-Transformations-on-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Performing-Transformations-on-Ellipses.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Performing-Transformations-on-Ellipses.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,79 ----
+ <html lang="en">
+ <head>
+ <title>Performing Transformations on Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions" title="Ellipse Constructors and Setting Functions">
+ <link rel="next" href="Ellipse-Operators.html#Ellipse-Operators" title="Ellipse Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Performing-Transformations-on-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.3 Performing Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>do_transform</b> (<var>const Transform&amp; t, </var>[<var>bool check = </var><code>false</code>])<var><a name="index-do_005ftransform-720"></a></var><br>
+ <blockquote><p>Performs a transformation on an <code>Ellipse</code>.  The <code>Points</code> on
+ the <code>Ellipse</code> are multiplied by <var>t</var>. 
+ Then, if <var>check</var> is <code>true</code>,
+ <code>is_elliptical()</code> is called on the <code>Ellipse</code>. 
+ If the transformation has caused it to
+ become non-elliptical, <code>axis_h</code> and <code>axis_v</code> are set to
+ <code>INVALID_REAL</code>, and a warning is issued to <code>stderr</code>. 
+ <code>center</code>, <code>focus0</code>, and <code>focus1</code> are not set to
+ <code>INVALID_POINT</code>.  They may may no longer really be
+ the center and foci of the (non-elliptical) <code>Ellipse</code>, but they may
+ have some use for the programmer and/or user.
+ 
+         <p>If <var>check</var> is <code>true</code>, and the transformation does not cause
+ <code>*this</code> to become non-elliptical,
+ <code>axis_h</code>, <code>axis_v</code>, <code>linear_eccentricity</code>,
+ <code>numerical_eccentricity</code>, <code>focus0</code>, and
+ <code>focus1</code> are recalculated.
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Perspective-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Perspective-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Perspective-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Perspective-Functions.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,117 ----
+ <html lang="en">
+ <head>
+ <title>Perspective Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Utility-Functions.html#Utility-Functions" title="Utility Functions">
+ <link rel="prev" href="Utility-Functions.html#Utility-Functions" title="Utility Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Perspective-Functions"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Utility-Functions.html#Utility-Functions">Utility Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Utility-Functions.html#Utility-Functions">Utility Functions</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">38.1 Perspective Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>persp_0</b> (<var>const real front_corner_x, const real front_corner_z, const real side_lft, const real side_rt, const real angle_rt, const real f_2_cv, const real gl_2_cv, </var>[<var>const real horizon_lft = 6, </var>[<var>real horizon_rt = 0, </var>[<var>real gl_lft = 0, </var>[<var>real gl_rt = 0</var>]]]])<var><a name="index-persp_005f0-889"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">utility.web</span></samp>. 
+ This function is used for the figure in <a href="The-Perspective-Projection.html#The-Perspective-Projection">The Perspective Projection</a>, illustrating a perspective projection as it could be done
+ by hand.  It draws a rectangle in the ground plane and the construction
+ lines used for putting it into perspective.  It also labels the
+ vanishing and measuring points.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><code>const real</code><var> front_corner_x</var><dd>The x-coordinate of the front corner of the rectangle.
+ 
+           <br><dt><code>const real</code><var> front_corner_z</var><dd>The z-coordinate of the front corner of the rectangle.
+ 
+           <br><dt><code>const real</code><var> side_lft</var><dd>The length of the left side of the rectangle.
+ 
+           <br><dt><code>const real</code><var> side_rt</var><dd>The length of the right side of the rectangle.
+ 
+           <br><dt><code>const real</code><var> angle_rt</var><dd>The angle at which the right side of the rectangle recedes to the
+ horizon.
+ 
+           <br><dt><code>const real</code><var> f_2_cv</var><dd>The distance from the focus to the center of vision.
+ 
+           <br><dt><code>const real</code><var> gl_2_cv</var><dd>The distance of the ground line to the center of vision.
+ 
+           <br><dt><code>const real</code><var> horizon_lft</var><dd>Default: 6. 
+ The length of the horizon line leftwards of the center of vision.
+ 
+           <br><dt><code>real</code><var> horizon_rt</var><dd>Default: 0. 
+ The length of the horizon line rightwards of the center of vision.
+ 
+           <br><dt><code>real</code><var> gl_lft</var><dd>Default: 0. 
+ The length of the ground line leftwards of the line from the focus to
+ the center of vision.
+ 
+           <br><dt><code>real</code><var> gl_rt</var><dd>Default: 0. 
+ The length of the ground line rightwards of the line from the focus to
+ the center of vision. 
+ </dl>
+ 
+         <p>Example:
+ 
+      <pre class="example">          persp_0(3, 2, 10, 5, 47.5, 7, 5, 8.5, 9.5, 8.5, 9.5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF199.png"
+ alt="[Figure 199. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 199. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- addfile.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Constructors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Constructors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Constructors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Constructors.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Picture Constructors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Picture-Global-Variables.html#Picture-Global-Variables" title="Picture Global Variables">
+ <link rel="next" href="Picture-Operators.html#Picture-Operators" title="Picture Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Constructors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Picture-Operators.html#Picture-Operators">Picture Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Global-Variables.html#Picture-Global-Variables">Picture Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.3 Constructors</h3>
+ 
+ <!-- !! Change text for all default constructors, as below. -->
+ <div class="defun">
+ &mdash; Default constructor: void <b>Picture</b> (<var>void</var>)<var><a name="index-Picture-307"></a></var><br>
+ <blockquote><p>Creates an empty <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Picture</b> (<var>const Picture&amp; p</var>)<var><a name="index-Picture-308"></a></var><br>
+ <blockquote><p>Creates a copy of <code>Picture</code> <var>p</var>.
+ 
+      <pre class="example">          Circle c(origin, 3);
+           c.draw();
+           current_picture.output(Projections::PARALLEL_X_Z);
+           Picture new_picture(current_picture);
+           new_picture.shift(2);
+           new_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF77.png"
+ alt="[Figure 77. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 77. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Data-Members.html
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*** 0 ****
--- 1,110 ----
+ <html lang="en">
+ <head>
+ <title>Picture Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="next" href="Picture-Global-Variables.html#Picture-Global-Variables" title="Picture Global Variables">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Picture-Global-Variables.html#Picture-Global-Variables">Picture Global Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-302"></a></var><br>
+ <blockquote><p>Applied to the <code>Shapes</code> on the <code>Picture</code> when the latter is
+ output.  It is initialized as the identity <code>Transform</code>, and can be
+ modified by the transformation functions, by
+ <code>Picture::operator*=(const Transform&amp;)</code>
+ (see <a href="Picture-Operators.html#Picture-Operators">Picture Reference; Operators</a>), and by
+ <code>Picture::set_transform()</code>
+ (see <a href="Modifying-Pictures.html#Modifying-Pictures">Picture Reference; Modifying</a>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: vector&lt;Shape*&gt; <b>shapes</b><var><a name="index-shapes-303"></a></var><br>
+ <blockquote><p>Contains pointers to the <code>Shapes</code> on the <code>Picture</code>. 
+ When a drawing or filling function is invoked for a <code>Shape</code>, a copy
+ is dynamically allocated and a pointer to the copy is placed onto
+ <code>shapes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: vector&lt;Label*&gt; <b>labels</b><var><a name="index-labels-304"></a></var><br>
+ <blockquote><p>Contains pointers to the <code>Labels</code> on the <code>Picture</code>.  When a
+ <code>Point</code> is labelled, either directly or through a call to
+ <code>label()</code> or <code>dotlabel()</code> for another type of
+ <code>Shape</code><a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>,
+ a <code>Label</code> is dynamically allocated, the <code>Point</code> is copied to
+ <code>*Label::pt</code>, and a pointer to the <code>Label</code> is placed onto
+ <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>do_labels</b><var><a name="index-do_005flabels-305"></a></var><br>
+ <blockquote><p>Used for enabling or disabling output of <code>Labels</code> when outputting a
+ <code>Picture</code>.  The default value is <code>true</code>.  It is set to
+ <code>false</code> by using <code>suppress_labels()</code> and can be reset to
+ <code>true</code> by using <code>unsuppress_labels()</code>. 
+ See <a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Reference; Output Functions</a>.
+ 
+         <p>Often, when a <code>Picture</code> is copied, transformed, and output again in
+ a single figure, it's undesirable to have the <code>Labels</code> output again
+ in their new positions.  To avoid this, use <code>suppress_labels()</code>
+ after outputting the <code>Picture</code> the first time. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <code>label()</code> and <code>dotlabel()</code>
+ are currently only defined for <code>Point</code> and <code>Path</code> (and the
+ latter's derived classes), i.e., not for <code>Solid</code> and its derived
+ classes.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Global-Variables.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Global-Variables.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Global-Variables.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Global-Variables.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,63 ----
+ <html lang="en">
+ <head>
+ <title>Picture Global Variables - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Picture-Data-Members.html#Picture-Data-Members" title="Picture Data Members">
+ <link rel="next" href="Picture-Constructors.html#Picture-Constructors" title="Picture Constructors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Global-Variables"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Picture-Constructors.html#Picture-Constructors">Picture Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.2 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Variable <b>Picture</b><var> current_picture<a name="index-Picture-306"></a></var><br>
+ <blockquote><p>The <code>Picture</code> used as the default by the drawing and filling
+ functions. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,114 ----
+ <html lang="en">
+ <head>
+ <title>Picture Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Picture-Constructors.html#Picture-Constructors" title="Picture Constructors">
+ <link rel="next" href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures" title="Affine Transformations for Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Constructors.html#Picture-Constructors">Picture Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Picture&amp; p</var>)<var><a name="index-operator_003d-309"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>p</var>, destroying the old contents of <code>*this</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>const Picture&amp; p</var>)<var><a name="index-operator_002b_003d-310"></a></var><br>
+ <blockquote><p>Adds the contents of <var>p</var> to <code>*this</code>.  <var>p</var> remains unchanged. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Shape* s</var>)<var><a name="index-operator_002b_003d-311"></a></var><br>
+ <blockquote><p>Puts <var>s</var> onto <code>shapes</code>.  Note that the pointer <var>s</var>
+ itself is put onto <code>shapes</code>, so any allocation and copying must be
+ performed first.  This is a low-level function that users normally won't
+ need to use directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Label* label</var>)<var><a name="index-operator_002b_003d-312"></a></var><br>
+ <blockquote><p>Puts <var>label</var> onto <code>labels</code>. 
+ Note that the pointer <var>label</var>
+ itself is put onto <code>labels</code>, so any allocation and copying must be
+ performed first.  This is a low-level function that users normally won't
+ need to invoke directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-313"></a></var><br>
+ <blockquote><p>Multiplies <code>transform</code> by <var>t</var>.  This has the effect of
+ transforming all of the <code>Shapes</code> on <code>shapes</code> and all of
+ the <code>Points</code> of the <code>Labels</code> on <code>labels</code> by <var>t</var> upon
+ output.
+ 
+      <pre class="example">          Transform t;
+           t.rotate(0, 0, 180);
+           t.shift(3);
+           Reg_Polygon pl(origin, 5, 3, 90);
+           pl.draw();
+           pl.label();
+           current_picture.output(Projections::PARALLEL_X_Y);
+           current_picture *= t;
+           current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF78.png"
+ alt="[Figure 78. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 78. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Output-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Output-Functions.html
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*** 0 ****
--- 1,237 ----
+ <html lang="en">
+ <head>
+ <title>Picture Output Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Outputting-Pictures.html#Outputting-Pictures" title="Outputting Pictures">
+ <link rel="prev" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces" title="Picture Output Namespaces">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Output-Functions"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">21.8.2 Output Functions</h4>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>const Focus&amp; f, </var>[<var>const unsigned short projection = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1, </var>[<var>const unsigned short sort_value = </var><code>Sorting::MAX_Z</code><var>, </var>[<var>const bool do_warnings = </var><code>true</code><var>, </var>[<var>const real min_x_proj = -40, </var>[<var>const real max_x_proj = 40, </var>[<var>const real min_y_proj = -40, </var>[<var>const real max_y_proj = 40, </var>[<var>const real min_z_proj = -40, </var>[<var>const real max_z_proj = 40</var>]]]]]]]]]])<var><a name="index-output-335"></a></var><br>
+ &mdash; Function: void <b>output</b> ([<var>const unsigned short projection = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1, </var>[<var>const unsigned short sort_value = </var><code>Sorting::MAX_Z</code><var>, </var>[<var>const bool do_warnings = </var><code>true</code><var>, </var>[<var>const real min_x_proj = -40, </var>[<var>const real max_x_proj = 40, </var>[<var>const real min_y_proj = -40, </var>[<var>const real max_y_proj = 40, </var>[<var>const real min_z_proj = -40, </var>[<var>const real max_z_proj = 40</var>]]]]]]]]]])<var><a name="index-output-336"></a></var><br>
+ <blockquote><p>These functions create a two-dimensional projection of the objects on the
+ <code>Picture</code> and write MetaPost code to <code>out_stream</code> for
+ drawing it.
+ 
+         <p>The arguments:
+ 
+           <dl>
+ <dt><code>const Focus&amp;</code> <var>f</var><dd>The <code>Focus</code> used for projection, also known as the center of
+ projection, or the camera. 
+ This argument is used in the first version only. 
+ The second version, without a <code>const Focus&amp;</code> <var>f</var> argument,
+ merely calls the first version and passes it the global variable
+ <code>default_focus</code> as its first argument, so <code>default_focus</code> is
+ effectively the default for <var>f</var>.  Defining two versions in this way makes it
+ possible to call
+ <code>output()</code> with <code>projection</code> as its first (and possibly only)
+ argument.  If instead, <var>f</var> were an optional argument with
+ <code>default_focus</code> as its default, this wouldn't have been possible.  It
+ also wouldn't be possible to have <var>f</var> have a default in the first
+ version, and to retain the second version, because the compiler wouldn't
+ be able to resolve a call to <code>output()</code> with no arguments.
+ 
+           <br><dt><code>const unsigned short</code> <var>projection</var><dd>Default: <code>Projections::PERSP</code>. 
+ The type of projection.  Valid values are <code>const unsigned shorts</code>
+ defined in <code>namespace Projections</code>
+ (see <a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a>):<br>
+ <code>PERSP</code> for the perspective projection,<br>
+ <code>PARALLEL_X_Y</code> for parallel projection onto the x-y plane,<br>
+ <code>PARALLEL_X_Z</code> for parallel projection onto the x-z plane, and<br>
+ <code>PARALLEL_Z_Y</code> for parallel projection onto the z-y plane. 
+ %% !! TO DO:
+ I plan to add isometric and axionometric projections soon.
+ 
+           <br><dt><code>real</code> <var>factor</var><dd>Default: 1. 
+ Passed from <code>output()</code> to
+ <code>extract()</code> and from there to <code>project()</code>.  The
+ <code>world_coordinates</code> of the <code>Points</code> that are projected are
+ multiplied by <var>factor</var>, which enlarges or shrinks the projected
+ image without altering the <code>Picture</code> itself.  <var>factor</var>
+ is probably most useful for parallel projections, where the <code>Focus</code>
+ <var>f</var> isn't used;  with a perspective projection, the parameters of
+ the <code>Focus</code> can be used to influence the size of the projected
+ image.
+ 
+           <br><dt><code>const unsigned short</code> <var>sort_value</var><dd>Default: <code>Sorting::MAX_Z</code>. 
+ The value used should be one of the constants defined in
+ <code>namespace Sorting</code>, See <a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a>, above. 
+ If <code>MAX_Z</code> (the default) is used, the <code>Shapes</code> on the
+ <code>Picture</code> are sorted according to the maximum z-value of the
+ <code>projective_extremes</code> of the <code>Points</code> belonging to the
+ <code>Shape</code>.  If <code>MIN_Z</code> is used,
+ they are sorted according to the minimum z-value, and
+ if <code>MEAN_Z</code> is used, they are sorted according to the  mean of
+ the maximum and minimum z-values.  If <code>NO_SORT</code> is used, the
+ <code>Shapes</code> are output in the order in which they were put onto the
+ <code>Picture</code>.
+ 
+           <p>The surface hiding algorithm
+ implemented in 3DLDF is quite primitive, and doesn't always work right. 
+ For <code>Shapes</code> that intersect, it <em>can't</em> work right. 
+ <!-- !! TO DO: -->
+ I plan to work on improving the surface hiding algorithm soon.  This is
+ not a trivial problem.  To solve it properly, each <code>Shape</code> on a
+ <code>Picture</code> must be tested for intersection with every other
+ <code>Shape</code> on the <code>Picture</code>.  If two or more <code>Shapes</code> intersect,
+ they must be broken up into smaller objects until there are no more
+ intersections.  I don't expect to have a proper solution soon, but I
+ expect that I will be able to make some improvements. 
+ See <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>.
+ 
+           <br><dt><code>const bool</code> <var>do_warnings</var><dd>Default: <code>true</code>.  If <code>true</code>, <code>output()</code> issues warnings
+ to <code>stderr</code> (standard error output) if a <code>Shape</code> cannot be
+ output because it lies
+ outside the limits set by the following arguments.  Sometimes, a user
+ may only want to project a portion of a <code>Picture</code>, in which case
+ such warnings would not be helpful.  In this case, <var>do_warnings</var>
+ should be <code>false</code>.
+ 
+           <br><dt><code>const real</code> <var>min_x_proj</var><dd>Default: -40.  The minimum x-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[0]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_x_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_x_proj</var><dd>Default: 40. 
+ The maximum x-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[0]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_x_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>min_y_proj</var><dd>Default: -40. 
+ The minimum y-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[1]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_y_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_y_proj</var><dd>Default: 40. 
+ The maximum y-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[1]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_y_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>min_z_proj</var><dd>Default: -40. 
+ The minimum z-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[2]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_z_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_z_proj</var><dd>Default: 40. 
+ The maximum z-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[2]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_z_proj</var>, the <code>Shape</code> will not be
+ projected at all. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>suppress_labels</b> (<var>void</var>)<var><a name="index-suppress_005flabels-337"></a></var><br>
+ <blockquote><p>Suppresses output of the <code>Labels</code> on a <code>Picture</code> when
+ <code>output()</code> is called.  This can be useful when a <code>Picture</code> is
+ output, transformed, and output again, one or more times, in a single figure. 
+ Usually, it will not be desirable to have the <code>Labels</code> output more
+ than once.
+ 
+         <p>In [next figure]
+ , <code>current_picture</code> is output three times, but the
+ <code>Labels</code> on it are only output once.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5);
+           e.label();
+           e.draw();
+           Point pt0(-3);
+           Point pt1(3);
+           pt0.draw(pt1);
+           Point pt2(0, 0, -4);
+           Point pt3(0, 0, 4);
+           pt2.draw(pt3);
+           pt0.dotlabel("0", "lft");
+           pt1.dotlabel("1", "rt");
+           pt2.dotlabel("2", "bot");
+           pt3.dotlabel("3");
+           current_picture.output(Projections::PARALLEL_X_Z);
+           current_picture.rotate(0, 60);
+           current_picture.suppress_labels();
+           current_picture.output(Projections::PARALLEL_X_Z);
+           current_picture.rotate(0, 60);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF79.png"
+ alt="[Figure 79. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 79. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>unsuppress_labels</b> (<var>void</var>)<var><a name="index-unsuppress_005flabels-338"></a></var><br>
+ <blockquote><p>Sets <code>do_labels</code> to <code>true</code>.  If a <code>Picture</code> contains
+ <code>Labels</code>, <code>unsuppress_labels()</code> ensures that they will be
+ output, when <code>Picture::output()</code> is called, so long as there is no
+ intervening call to <code>suppress_labels()</code> or <code>kill_labels()</code>. 
+ </p></blockquote></div>
+ 
+ <!-- point.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Output-Namespaces.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Output-Namespaces.html
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+ <html lang="en">
+ <head>
+ <title>Picture Output Namespaces - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Outputting-Pictures.html#Outputting-Pictures" title="Outputting Pictures">
+ <link rel="prev" href="Outputting-Pictures.html#Outputting-Pictures" title="Outputting Pictures">
+ <link rel="next" href="Picture-Output-Functions.html#Picture-Output-Functions" title="Picture Output Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Output-Namespaces"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">21.8.1 Namespaces</h4>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a>
+ <li><a accesskey="2" href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Picture-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Picture-Reference.html
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+ <html lang="en">
+ <head>
+ <title>Picture Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link rel="next" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Picture-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Reference.html#Point-Reference">Point Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Label-Reference.html#Label-Reference">Label Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">21 Picture Reference</h2>
+ 
+ <p><a name="index-Picture-301"></a>Class <code>Picture</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a>
+ <li><a accesskey="2" href="Picture-Global-Variables.html#Picture-Global-Variables">Picture Global Variables</a>
+ <li><a accesskey="3" href="Picture-Constructors.html#Picture-Constructors">Picture Constructors</a>
+ <li><a accesskey="4" href="Picture-Operators.html#Picture-Operators">Picture Operators</a>
+ <li><a accesskey="5" href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>
+ <li><a accesskey="6" href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a>
+ <li><a accesskey="7" href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a>
+ <li><a accesskey="8" href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Pictures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Pictures.html
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+ <html lang="en">
+ <head>
+ <title>Pictures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Solid-Figures.html#Solid-Figures" title="Solid Figures">
+ <link rel="next" href="Intersections.html#Intersections" title="Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Pictures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Intersections.html#Intersections">Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Figures.html#Solid-Figures">Solid Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">9 Pictures</h2>
+ 
+ <p><a name="index-Picture-68"></a>Applying drawing and filling operations to the drawable objects described
+ in the previous chapters isn't enough to produce output.  These
+ operations merely modify the <code>Picture</code> object that was passed to
+ them as an argument (<code>current_picture</code>, by default).
+ 
+    <p><code>Pictures</code> in 3DLDF are quite different from <code>pictures</code> in
+ MetaPost. 
+ When a drawing or filling operation is applied to an object <var>O</var>, a
+ copy of <var>O</var>, <var>C</var>, is allocated on the free store, a pointer to
+ <code>Shape</code> <var>S</var> is pointed at <var>C</var>, and <var>S</var> is pushed onto
+ the <code>vector&lt;Shape*&gt; shapes</code> on the <code>Picture</code> <var>P</var>, which
+ was passed as an argument to the drawing or filling command.  The
+ arguments for the pen,
+ dash pattern, <code>Color</code>, and any others, are used to set the
+ corresponding data members of <var>C</var> (not <var>O</var>).
+ 
+    <p><a name="index-output-file-69"></a><a name="index-out_005fstream-70"></a>In order to actually
+ cause MetaPost code to be written to the output file, it is necessary
+ to invoke <var>P</var>.<code>output()</code>.  Now, the appropriate version of
+ <code>output()</code> is applied to each of the objects pointed to
+ by a pointer on <var>P</var>.<code>shapes</code>.  <code>output()</code> is a pure
+ virtual function in <code>Shape</code>, so all classes derived from
+ <code>Shape</code> must have an <code>output()</code> function.  So, if
+ <code>shapes[0]</code> points to a <code>Path</code>,
+ <code>Path::output()</code> is called, if
+ <code>shapes[1]</code> points to a <code>Point</code>,
+ <code>Point::output()</code> is called, and if <code>shapes[2]</code> points to an
+ object of a type derived from <code>Solid</code>, <code>Solid::output()</code> is
+ called. 
+ <code>Point</code>, <code>Path</code>, and <code>Solid</code> are namely the only classes
+ derived from <code>Shape</code> for which a version of <code>output()</code> is defined.  All
+ other <code>Shapes</code> are derived from one of these classes. 
+ These <code>output()</code>
+ functions then write the MetaPost code to the
+ output file through the output file stream <code>out_stream</code>.
+ 
+ <pre class="example">     beginfig(1);
+      default_focus.set(0, 0, -10, 0, 0, 10, 10);
+      Circle c(origin, 3, 90);
+      c.draw();
+      c.shift(1.5);
+      c.draw();
+      current_picture.output();
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF50.png"
+ alt="[Figure 50. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 50. 
+ <br>
+ </p>
+ 
+    <p>The C++
+  code for [the previous figure]
+  starts with the command
+ <code>beginfig(1)</code> and ends with the command
+ <code>endfig(1)</code>. 
+ They simply write &ldquo;<code>beginfig(&lt;arg&gt;
+ )</code>&rdquo; and
+ &ldquo;<code>endfig()</code>&rdquo; to
+ <a name="index-out_005fstream-71"></a><code>out_stream</code>,
+ <a name="index-output-files-72"></a>The optional
+ <code>unsigned int</code> argument to <code>endfig()</code> is not written to
+ <code>out_stream</code>, it's merely
+ &ldquo;syntactic sugar&rdquo; for the user. 
+ <!-- !! TO DO:  Try to find the place in the @TeX{}book, where Knuth -->
+ <!-- explains what ``syntactic sugar'' is. -->
+ 
+    <p>In MetaPost, the <code>endfig</code> command causes output and then clears
+ <code>currentpicture</code>.  This is not the case in 3DLDF, where
+ <code>Picture::output()</code> and <code>Picture::clear()</code> must
+ be invoked explicitly:
+ 
+ <pre class="example">     beginfig(1);
+      Point p0;
+      Point p1(1, 2, 3);
+      p0.draw(p1);
+      current_picture.output();
+      endfig(1);
+      
+      beginfig(2);
+      current_picture.clear();
+      Circle C(origin, 3);
+      C.fill();
+      current_picture.output();
+      endfig(2);
+ </pre>
+    <p>In [next figure]
+ , two <code>Pictures</code> are used within a single figure.
+ 
+ <pre class="example">     beginfig(1);
+      Picture my_picture;
+      default_focus.set(0, 0, -10, 0, 0, 10, 10);
+      Circle c(origin, 3, 90);
+      c.draw(my_picture);
+      my_picture.output();
+      c.shift(1.5);
+      c.fill(light_gray);
+      current_picture.output();
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF51.png"
+ alt="[Figure 51. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 51. 
+ <br>
+ </p>
+ 
+    <p>Multiple objects, or complex objects made up of sub-objects, can be
+ stored in a <code>Picture</code>, so that operations can be applied to them
+ as a group:
+ 
+ <pre class="example">     default_focus.set(7, 5, -10, 7, 5, 10, 10);
+      Cuboid c0(origin, 5, 5, 5);
+      c0.shift(0, 0, 3);
+      c0.draw();
+      Circle z0(c0.get_rectangle_center(0), 2.5, 90, 0, 0, 64);
+      z0.draw();
+      Circle z1(z0);
+      z1.shift(0, 0, -1);
+      z1.draw();
+      int i;
+      int j = z0.get_size();
+      for (i = 0; i &lt; 8; ++i)
+          z0.get_point(i * j/8).draw(z1.get_point(i * j/8));
+      Cuboid c1(c0.get_rectangle_center(4), 5, 3, 3);
+      c1.shift(0, 2.5);
+      c1.draw();
+      Rectangle r0 = *c1.get_rectangle_ptr(3);
+      Point p[10];
+      for (i = 0; i &lt; 4; ++i)
+        p[i] = r0.get_point(i);
+      p[4] = r0.get_mid_point(0);
+      p[5] = r0.get_mid_point(2);
+      p[6] = p[4].mediate(p[5], 2/3.0);
+      Circle z2(p[6], 2, 90, 90, 0, 16);
+      z2.draw();
+      Circle z3 = z2;
+      z3.shift(3);
+      z3.draw();
+      j = z2.get_size();
+      for (i = 0; i &lt; 8; ++i)
+          z2.get_point(i * j/8).draw(z3.get_point(i * j/8));
+      p[7] = c0.get_rectangle_center(2);
+      p[7].shift(-4);
+      p[8] = c0.get_rectangle_center(3);
+      p[8].shift(4);
+      current_picture.output();
+      current_picture.rotate(45, 45);
+      current_picture.shift(10, 0, 3);
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF52.png"
+ alt="[Figure 52. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 52. 
+ <br>
+ </p>
+ 
+    <p>Let's say the complex object in [the previous figure]
+  represents a
+ furnace.  From the point of view of 3DLDF, however, it's not an object
+ at all, and the drawing consists of a collection of unrelated
+ <code>Cuboids</code>, <code>Circles</code>, <code>Rectangles</code>, and <code>Paths</code>. 
+ If we hadn't put it into a <code>Picture</code>, we could still have rotated
+ and shifted it, but only by applying the operations to each of the
+ sub-objects individually.
+ 
+    <p>One consequence of the way <code>Pictures</code> are output in 3DLDF is, that
+ the following code will not work:
+ 
+ <pre class="example">     beginfig(1);
+      Point p(1, 2);
+      Point q(1, 3);
+      out_stream &lt;&lt; "pickup pencircle scaled .5mm;" &lt;&lt; endl;
+      origin.draw(p);
+      out_stream &lt;&lt; "pickup pensquare xscaled .3mm rotated 30;" &lt;&lt; endl;
+      origin.draw(q);
+      current_picture.output();
+      endfig();
+ </pre>
+    <p>This is the MetaPost code that results:
+ 
+ <pre class="example">     beginfig(1);
+      pickup pencircle scaled .5mm;
+      pickup pensquare xscaled .3mm rotated 30;
+      draw (0.000000cm, -3.000000cm) -- (1.000000cm, -1.000000cm);
+      draw (0.000000cm, -3.000000cm) -- (1.000000cm, 0.000000cm);
+      endfig;
+ </pre>
+    <p>It's perfectly legitimate to write
+ <a name="index-raw-MetaPost-code-73"></a>raw MetaPost code to <code>out_stream</code>, as in lines 4 and 6 of this
+ example.  However, the <code>draw()</code> commands do not cause any output to
+ <code>out_stream</code>.  The MetaPost drawing commands are written to
+ <code>out_stream</code> when <code>current_picture.output()</code> is called. 
+ Therefore, the <code>pickup</code> commands are &ldquo;bunched up&rdquo; before the
+ drawing commands. 
+ In this example,
+ setting <code>currentpen</code> to <code>pencircle scaled .5mm</code> has no effect,
+ because it is immediately reset to
+ <code>pensquare xscaled .3mm rotated 30</code> in the MetaPost code, before
+ the <code>draw</code> commands. 
+ It is not possible to change <code>currentpen</code> in this way within a
+ <code>Picture</code>. 
+ Since the <code>draw()</code> commands in the 3DLDF
+ code didn't specify a <var>pen</var> argument,
+ <code>currentpen</code> with its final value is used for both of the MetaPost
+ <code>draw</code> commands.  For any given invocation of
+ <code>Picture::output()</code>, there can only be one value of
+ <code>currentpen</code>.  All other pens must be passed as arguments to the
+ drawing commands.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Projections.html#Projections">Projections</a>
+ <li><a accesskey="2" href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a>
+ <li><a accesskey="3" href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Plane-Figures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Plane-Figures.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Plane Figures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Paths.html#Paths" title="Paths">
+ <link rel="next" href="Solid-Figures.html#Solid-Figures" title="Solid Figures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Plane-Figures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solid-Figures.html#Solid-Figures">Solid Figures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Paths.html#Paths">Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">7 Plane Figures</h2>
+ 
+ <p><a name="index-Circle-57"></a><a name="index-Ellipse-58"></a><a name="index-Polygon-59"></a><a name="index-Rectangle-60"></a><a name="index-Reg_005fCl_005fPlane_005fCurve-61"></a><a name="index-Reg_005fPolygon-62"></a>3DLDF currently includes the following classes representing plane
+ geometric figures:  <code>Polygon</code>, <code>Reg_Cl_Plane_Curve</code>
+ (&ldquo;Regular Closed Plane Curve&rdquo;), <code>Reg_Polygon</code> (&ldquo;Regular
+ Polygon&rdquo;), <code>Rectangle</code>, <code>Ellipse</code> and
+ <code>Circle</code>.  <code>Polygon</code> and <code>Reg_Cl_Plane_Curve</code> are derived
+ from <code>Path</code>, <code>Reg_Polygon</code> and <code>Rectangle</code> are derived
+ from <code>Polygon</code>, and <code>Ellipse</code> and <code>Circle</code> are derived
+ from <code>Reg_Cl_Plane_Curve</code>.  <code>Polygon</code> and
+ <code>Reg_Cl_Plane_Curve</code> are meant to be used as base classes only, so
+ objects of these types should normally never be declared.
+ 
+    <p>Since <code>Reg_Polygon</code>, <code>Rectangle</code>, <code>Ellipse</code>, and
+ <code>Circle</code> all ultimately derive from <code>Path</code>, they are really
+ just special kinds of <code>Path</code>. 
+ In particular, they inherit their drawing and filling functions from
+ <code>Path</code>, and their transformation functions take the same arguments
+ as the <code>Path</code> versions. 
+ They also have constructors
+ and setting functions that work in a similar way, with a few minor
+ differences, to account for their different natures. 
+ See <a href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>, <a href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>,
+ <a href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>, and <a href="Circle-Reference.html#Circle-Reference">Circle Reference</a>, for complete
+ information on these classes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Regular-Polygons-Getstart.html#Regular-Polygons-Getstart">Regular Polygons Getstart</a>
+ <li><a accesskey="2" href="Rectangles-Getstart.html#Rectangles-Getstart">Rectangles Getstart</a>
+ <li><a accesskey="3" href="Ellipses-Getstart.html#Ellipses-Getstart">Ellipses Getstart</a>
+ <li><a accesskey="4" href="Circles-Getstart.html#Circles-Getstart">Circles Getstart</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Plane-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Plane-Intersections.html
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*** 0 ****
--- 1,170 ----
+ <html lang="en">
+ <head>
+ <title>Plane Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Planes-Returning-Information.html#Planes-Returning-Information" title="Planes Returning Information">
+ <link rel="next" href="Planes-Showing.html#Planes-Showing" title="Planes Showing">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Plane-Intersections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Planes-Showing.html#Planes-Showing">Planes Showing</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Planes-Returning-Information.html#Planes-Returning-Information">Planes Returning Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.6 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point <b>intersection_point</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoint-521"></a></var><br>
+ &mdash; <code>const</code> function: bool_point <b>intersection_point</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoint-522"></a></var><br>
+ <blockquote><p>These functions find the intersection point of the <code>Plane</code> and a
+ line.  In the first version, the
+ line is defined by the two <code>Point</code> arguments.  In the second
+ version, the <code>Path</code> <var>p</var> must be linear, i.e.,
+ <var>p</var>.<code>is_linear()</code> must be <code>true</code>.
+ 
+         <p>Both versions of <code>intersection_point()</code> return a <code>bool_point</code>
+ <var>bp</var>, where  <var>bp</var>.<code>pt</code> is the intersection point, or
+ <code>INVALID_POINT</code>, if there is none.  If an intersection point is
+ found, <var>bp</var>.<code>b</code> will be <code>true</code>, otherwise <code>false</code>. 
+ Returning a <code>bool_point</code> makes it possible to test for success
+ without comparing the <code>Point</code> returned against <code>INVALID_POINT</code>.
+ 
+      <pre class="example">          Point center(2, 2, 3.5);
+           Reg_Polygon h(center, 6, 4, 80, 30, 10);
+           Plane q = h.get_plane();
+           Point P0 = center.mediate(h.get_point(2));
+           P0.shift(5 * (N - center));
+           Point P1(P0);
+           P1.rotate(h.get_point(1), h.get_point(4));
+           P1 = 3 * (P1 - P0);
+           P1.shift(P0);
+           P1.shift(3, -.5, -2);
+           bool_point bp = q.intersection_point(P0, P1);
+           Point i_P = bp.pt;
+           Point P4 = h.get_point(3).mediate(h.get_point(0), .75);
+           P4.shift(N - center);
+           Point P5(P4);
+           P5.rotate(h.get_point(3), h.get_point(0));
+           P4.shift(-1, 2);
+           Path theta(P4, P5);
+           bp = q.intersection_point(theta);
+           Point i_theta = bp.pt;
+           draw_axes();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF107.png"
+ alt="[Figure 107. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 107. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>intersection_line</b> (<var>const Plane&amp; p</var>)<var><a name="index-intersection_005fline-523"></a></var><br>
+ <blockquote><p>Returns a <code>Line</code> <var>l</var>.  representing the line of intersection of two
+ <code>Planes</code>.  See <a href="Line-Reference.html#Line-Reference">Line Reference</a>.
+ 
+         <p>In [next figure]
+ , <code>intersection_line()</code> is used to find the line of
+ intersection of the <code>Planes</code> derived from the <code>Rectangles</code>
+ r_0 and r_1 using <code>get_plane()</code>
+ (see <a href="Querying-Paths.html#Querying-Paths">Paths Reference; Querying</a>). 
+ Please note that there is no guarantee that <var>l</var>.<code>position</code> will
+ be in a convenient place for your drawing.  A bit of fiddling was
+ needed to find the <code>Points</code> P_2 and P_3. 
+ <!-- !! TO DO: -->
+ I plan to add functions for finding the intersection lines of plane
+ figures, but haven't done so yet.
+ 
+      <pre class="example">          Rectangle r0(origin, 5, 5, 10, 15, 6);
+           Rectangle r1(origin, 5, 5, 90, 50, 10);
+           r1 *= r0.rotate(30, 30, 30);
+           r1 *= r0.shift(1, -1, 3);
+           Plane q0 = r0.get_plane();
+           Plane q1 = r1.get_plane();
+           Line l = q0.intersection_line(q1);
+           l.show("l:");
+           -| l:
+              position: (0, 11.2193, 20.0759)
+              direction: (0.0466595, -0.570146, -0.796753)
+           Point P0(l.direction);
+           P0.shift(l.position);
+           P0.show("P0:");
+           -| P0: (0.0466595, 10.6491, 19.2791)
+           Point P1(-l.direction);
+           P1.shift(l.position);
+           Point P2(P0 - P1);
+           P2 *= 12.5;
+           P2.shift(P0);
+           cout &lt;&lt; P2.is_on_plane(q0);
+           -| 1
+           cout &lt;&lt; P2.is_on_plane(q1);
+           -| 1
+           Point P3(P0 - P1);
+           P3 *= 7;
+           P3.shift(P0);
+           cout &lt;&lt; P3.is_on_plane(q0);
+           -| 1
+           cout &lt;&lt; P3.is_on_plane(q1);
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF108.png"
+ alt="[Figure 108. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 108. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Plane-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Plane-Reference.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Plane Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="next" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Plane-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Path-Reference.html#Path-Reference">Path Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Line-Reference.html#Line-Reference">Line Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">25 Plane Reference</h2>
+ 
+ <p><a name="index-Plane-508"></a>The <code>struct Plane</code>  is defined in <samp><span class="file">planes.web</span></samp>. 
+ <code>Planes</code> are not <code>Shapes</code>.  They are used for
+ performing vector operations.  A <code>Plane</code> is defined by a
+ <code>Point</code> representing a point on the plane, a <code>Point</code>
+ representing the normal to the plane, and the distance of the plane from
+ the origin.
+ 
+    <p>The most common use of <code>Planes</code> is to represent the
+ plane in which an existing plane figure lies.  Therefore, they
+ most likely to be created by using <code>Path::get_plane()</code>. 
+ See <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>.  However, <code>class
+ Plane</code> does have constructors for creating <code>Planes</code> directly, if
+ desired. 
+ See <a href="Planes-Constructors.html#Planes-Constructors">Planes Reference; Constructors</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a>
+ <li><a accesskey="2" href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Global Constants</a>
+ <li><a accesskey="3" href="Planes-Constructors.html#Planes-Constructors">Planes Constructors</a>
+ <li><a accesskey="4" href="Planes-Operators.html#Planes-Operators">Planes Operators</a>
+ <li><a accesskey="5" href="Planes-Returning-Information.html#Planes-Returning-Information">Planes Returning Information</a>
+ <li><a accesskey="6" href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a>
+ <li><a accesskey="7" href="Planes-Showing.html#Planes-Showing">Planes Showing</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Plane-Tesselations.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Plane-Tesselations.html
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+ <html lang="en">
+ <head>
+ <title>Plane Tesselations - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Pattern-Reference.html#Pattern-Reference" title="Pattern Reference">
+ <link rel="prev" href="Pattern-Reference.html#Pattern-Reference" title="Pattern Reference">
+ <link rel="next" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes" title="Roulettes and Involutes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Plane-Tesselations"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">Roulettes and Involutes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">33.1 Plane Tesselations</h3>
+ 
+ <p>3DLDF can be used to make perspective projections of plane tesselations
+ and other two-dimensional patterns.  These can be used for
+ drawing tiled floors and other architectural items, among other things. 
+ While patterns can be generated by using the basic facilities of C++
+  and
+ 3DLDF without any specially defined functions, it can be useful to
+ define such functions.
+ 
+    <p>3DLDF currently contains only one function for drawing patterns based on
+ a plane tessellation.  I plan to add more soon.
+ 
+ <div class="defun">
+ &mdash; Function: unsigned int <b>hex_pattern_1</b> ([<var>real diameter_outer = 5, </var>[<var>real diameter_middle = 0, </var>[<var>real diameter_inner = 0, </var>[<var>unsigned short first_row = 5, </var>[<var>unsigned short double_rows = 10, </var>[<var>unsigned short row_shift = 2, </var>[<var>Color draw_color_outer = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_outer = </var><code>*Colors::background_color</code><var>, </var>[<var>Color draw_color_middle = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_middle = </var><code>*Colors::background_color</code><var>, </var>[<var>Color draw_color_inner = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_inner = </var><code>*Colors::background_color</code><var>, </var>[<var>string pen_outer = "pencircle scaled .5mm", </var>[<var>string pen_middle = "pencircle scaled .3mm", </var>[<var>string pen_inner = "pencircle scaled .3mm", </var>[<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>unsigned int max_hexagons = 1000</var>]]]]]]]]]]]]]]]]])<var><a name="index-hex_005fpattern_005f1-772"></a></var><br>
+ <blockquote><p>Draws a pattern consisting of hexagons forming a tesselation of the x-z
+ plane, with additional hexagons within them.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><code>real</code> <var>diameter_outer</var><dd>Default:  5.  The diameter of the outer hexagon in each set of three
+ hexagons.  The outer hexagons form a tessellation of the plane.
+ 
+           <br><dt><code>real</code> <var>diameter_middle</var><dd>Default: 0.  The diameter of the middle hexagon in a set of three
+ hexagons.
+ 
+           <br><dt><code>real</code> <var>diameter_inner</var><dd>Default: 0.  The diameter of the inner hexagon in a set of three
+ hexagons.
+ 
+           <br><dt><code>unsigned short</code> <var>first_row</var><dd>Default: 5.  The number of sets of hexagons in the first single row. 
+ The second single row will have
+ <var>first_row</var> + 1 sets of hexagons.
+ 
+           <br><dt><code>unsigned short</code> <var>double_rows</var><dd>Default: 10.  The number of double rows drawn.
+ 
+           <br><dt><code>unsigned short</code> <var>row_shift</var><dd>Default: 2. 
+ For <var>row_shift</var>
+ != 0,
+ the number of sets of hexagons in each (single) row is
+ increased by 2 every <var>row_shift</var> rows.  If <var>row_shift</var> ==
+ 0, the number sets of hexagons remains constant. 
+ The rows remain centered around the z-axis.
+ 
+           <br><dt><code>Color</code> <var>draw_color_outer</var><dd>Default: <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the outer hexagons.
+ 
+           <br><dt><code>Color</code> <var>fill_color_outer</var><dd>Default: <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the outer hexagons.
+ 
+           <br><dt><code>Color</code> <var>draw_color_middle</var><dd>Default:  <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the middle hexagon.
+ 
+           <br><dt><code>Color</code> fill_color_middle<dd>Default:  <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the middle hexagons.
+ 
+           <br><dt><code>Color</code> <var>draw_color_inner</var><dd>Default:  <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the inner hexagons.
+ 
+           <br><dt><code>Color</code> <var>fill_color_inner</var><dd>Default:  <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the inner hexagons.
+ 
+           <br><dt><code>string</code> <var>pen_outer</var><dd>Default: <code>"pencircle scaled .5mm"</code>. 
+ The pen used for drawing the outer hexagons.
+ 
+           <br><dt><code>string</code> <var>pen_middle</var><dd>Default:  <code>"pencircle scaled .3mm"</code>. 
+ The pen used for drawing the middle hexagons.
+ 
+           <br><dt><code>string</code> pen_inner<dd>Default:  <code>"pencircle scaled .3mm"</code>. 
+ The pen used for drawing the inner hexagons.
+ 
+           <br><dt><code>Picture&amp;</code> <var>picture</var><dd>Default:  <code>current_picture</code>. 
+ The <code>Picture</code> onto which the pattern is put.
+ 
+           <br><dt><code>unsigned int</code> <var>max_hexagons</var><dd>Default:  1000. 
+ The maximum number of hexagons that will be drawn.
+ 
+         </dl>
+ 
+         <p>Draws a pattern in the x-z plane consisting of hexagons.  The outer
+ hexagons form a tessellation.  The middle and inner hexagons fit
+ within the outer hexagons.  The hexagons are drawn in double rows. 
+ The tessellation can be repeated by copying a
+ double row and shifting the copy to lie directly behind the first double
+ row.  If the <code>Picture</code> with the pattern is projected with the
+ <code>Focus</code> in front of the pattern, looking in the direction of the back
+ of the pattern,
+ the first row of hexagons will appear larger than the rows
+ behind it.  Therefore, in order for the perspective projection of the
+ pattern to fill a rectangular area on the plane of projection,
+ it will generally be necessary to increase the number of sets of
+ hexagons in each double row.  On the other hand, if the same number of
+ sets of hexagons were used in the front double row, as will be needed for the
+ back double row, many of them would probably be unprojectable.
+ 
+         <p>The return value of this function is the number of hexagons drawn.
+ 
+      <pre class="example">          default_focus.set(0, 10, -10, 0, 10, 25, 10);
+           hex_pattern_1(1, 0, 0, 5, 5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF178.png"
+ alt="[Figure 178. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 178. 
+ <br>
+ </p>
+ 
+      <pre class="example">          default_focus.set(-5, 5, -10, 0, 10, 25, 10);
+           hex_pattern_1(2, 1.5, 1, 2, 5, 2, black, gray, black,
+                         light_gray, black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF179.png"
+ alt="[Figure 179. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 179. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Constructors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Constructors.html
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+ <html lang="en">
+ <head>
+ <title>Planes Constructors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Planes-Global-Constants.html#Planes-Global-Constants" title="Planes Global Constants">
+ <link rel="next" href="Planes-Operators.html#Planes-Operators" title="Planes Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Constructors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Planes-Operators.html#Planes-Operators">Planes Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Global Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Plane</b> (<var>void</var>)<var><a name="index-Plane-513"></a></var><br>
+ <blockquote><p>Creates a degenerate <code>Plane</code> with
+ <code>point</code> == <code>normal</code> == <code>origin</code>, and
+ <code>distance</code> == 0.
+ 
+         <p><code>Planes</code> constructed using this constructor will probably be set
+ using the assignment operator
+ or <code>Path::get_plane()</code>
+ immediately, or
+ very soon after being declared. 
+ See <a href="Planes-Operators.html#Planes-Operators">Planes Reference; Operators</a>, and
+ <a href="Querying-Paths.html#Querying-Paths">Paths Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Plane</b> (<var>const Plane&amp; p</var>)<var><a name="index-Plane-514"></a></var><br>
+ <blockquote><p>Creates a new <code>Plane</code>, making it a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Plane</b> (<var>const Point&amp; p, const Point&amp; n</var>)<var><a name="index-Plane-515"></a></var><br>
+ <blockquote><p>If <var>p</var> is not equal to <var>n</var>, this constructor creates a
+ <code>Plane</code> and sets <code>point</code> to <var>p</var>.  <code>normal</code>
+ is set to <var>n</var>, and made a unit vector. 
+ <code>distance</code> is calculated according to the following formula:
+ Let n stand for <code>normal</code>, p for <code>point</code>, and d for
+ <code>distance</code>:
+ d = -p \dot n. 
+ If d = 0, <code>origin</code>
+ lies in the <code>Plane</code>.  If d &gt; 0, <code>origin</code> lies on the side of the
+ <code>Plane</code> that <code>normal</code> points to, considered to be &ldquo;outside&rdquo;. 
+ If d&lt;0, <code>origin</code> lies on the side of the
+ <code>Plane</code> that <code>normal</code> does not point to, considered to be
+ &ldquo;inside&rdquo;.
+ 
+         <p>However, if <var>p</var> == <var>n</var>, <code>point</code> and <code>normal</code> are
+ both set to <code>INVALID_POINT</code>, and <code>distance</code> is set to
+ <code>INVALID_REAL</code>, i.e., <code>*this</code> will be equal to
+ <code>INVALID_PLANE</code>
+ (see <a href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Reference; Global Constants</a>).
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Point N(0, 1);
+           N.rotate(-35, 30, 20);
+           N.show("N:");
+           -| N: (-0.549659, 0.671664, 0.496732)
+           Plane q(P, N);
+           cout &lt;&lt; q.distance;
+           -| -0.618736
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF105.png"
+ alt="[Figure 105. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 105. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Planes Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="next" href="Planes-Global-Constants.html#Planes-Global-Constants" title="Planes Global Constants">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Global Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.1 Data Members</h3>
+ 
+ <p>Because the main purpose of <code>Plane</code> is to
+ provide information about <code>Shapes</code>, its data members are all
+ <code>public</code>.
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>point</b><var><a name="index-point-509"></a></var><br>
+ <blockquote><p>Represents a point on the plane. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>normal</b><var><a name="index-normal-510"></a></var><br>
+ <blockquote><p>Represents the normal to the plane. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: real <b>distance</b><var><a name="index-distance-511"></a></var><br>
+ <blockquote><p>The distance of the plane from the origin. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Global-Constants.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Global-Constants.html
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*** 0 ****
--- 1,66 ----
+ <html lang="en">
+ <head>
+ <title>Planes Global Constants - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Planes-Data-Members.html#Planes-Data-Members" title="Planes Data Members">
+ <link rel="next" href="Planes-Constructors.html#Planes-Constructors" title="Planes Constructors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Global-Constants"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Planes-Constructors.html#Planes-Constructors">Planes Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.2 Global Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Plane <b>INVALID_PLANE</b><var><a name="index-INVALID_005fPLANE-512"></a></var><br>
+ <blockquote><p>A <code>Plane</code> with <code>point</code> == <code>normal</code>, and
+ <code>distance</code> == <code>INVALID_REAL</code>.
+ 
+         <p><code>INVALID_PLANE</code> is returned from <code>Path::get_plane()</code>, if the
+ <code>Path</code> is not planar.  See <a href="Querying-Paths.html#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,101 ----
+ <html lang="en">
+ <head>
+ <title>Planes Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Planes-Constructors.html#Planes-Constructors" title="Planes Constructors">
+ <link rel="next" href="Planes-Returning-Information.html#Planes-Returning-Information" title="Planes Returning Information">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Planes-Returning-Information.html#Planes-Returning-Information">Planes Returning Information</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Planes-Constructors.html#Planes-Constructors">Planes Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: const Plane&amp; <b>operator=</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_003d-516"></a></var><br>
+ <blockquote><p>Sets <code>point</code> to <var>p</var>.<code>point</code>, <code>normal</code> to
+ <var>p</var>.<code>normal</code>, and <code>distance</code> to <var>p</var>.<code>distance</code>. 
+ The return value is <var>p</var>, so that invocations of this function can be
+ chained.
+ 
+      <pre class="example">          Point pt(2, 2.3, 6);
+           Point norm(-1, 12, -36);
+           Plane A(pt, norm);
+           Plane B;
+           Plane C;
+           B = C = A;
+           A.show("A:");
+           -| A:
+              normal: (-0.0263432, 0.316118, -0.948354)
+              point: (2, 2.3, 6)
+              distance == 5.01574
+           cout &lt;&lt; (A == B &amp;&amp; A == C &amp;&amp; B == C);
+           -| 1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_003d_003d-517"></a></var><br>
+ <blockquote><p>Equality operator.  Compares <code>*this</code> and <var>p</var>, and returns
+ <code>true</code>, if <code>point</code> == <var>p</var>.<code>point</code>,
+ <code>normal</code> == <var>p</var>.<code>normal</code>, and
+ <code>distance</code> == <var>p</var>.<code>distance</code>,
+ otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_0021_003d-518"></a></var><br>
+ <blockquote><p>Inequality operator.  Compares <code>*this</code> and <var>p</var> and returns
+ <code>true</code>, if <code>point</code> != 
+  <var>p</var>.<code>point</code>, or
+ <code>normal</code> != 
+  <var>p</var>.<code>normal</code>, or
+ <code>distance</code> != 
+  <var>p</var>.<code>distance</code>. 
+ Otherwise, it returns <code>false</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Returning-Information.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Returning-Information.html
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*** 0 ****
--- 1,133 ----
+ <html lang="en">
+ <head>
+ <title>Planes Returning Information - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Planes-Operators.html#Planes-Operators" title="Planes Operators">
+ <link rel="next" href="Plane-Intersections.html#Plane-Intersections" title="Plane Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Returning-Information"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Planes-Operators.html#Planes-Operators">Planes Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.5 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_short <b>get_distance</b> (<var>const Point&amp; p</var>)<var><a name="index-get_005fdistance-519"></a></var><br>
+ &mdash; <code>const</code> function: real_short <b>get_distance</b> (<var>void</var>)<var><a name="index-get_005fdistance-520"></a></var><br>
+ <blockquote><p>The version of this function taking a <code>Point</code> argument returns
+ a <code>real_short</code> <var>r</var>, whose <code>real</code> part
+ (<var>r</var>.<code>first</code>) represents
+ the distance of <var>p</var> from the <code>Plane</code>.  This value is always
+ positive.  <var>r</var>.<code>second</code> can take on three values:
+ 
+           <dl>
+ <dt>0<dd>If the <code>Point</code> lies in the <code>Plane</code>.
+ 
+           <br><dt>1<dd>If it lies on the side of the <code>Plane</code> pointed at by the
+ normal to the <code>Plane</code>, considered to be the &ldquo;outside&rdquo;.
+ 
+           <br><dt>-1<dd>If it lies on the side of the <code>Plane</code> <em>not</em> pointed at
+ by the normal to the <code>Plane</code>, considered to be the &ldquo;inside&rdquo;. 
+ </dl>
+ 
+         <p>The version taking no argument returns
+ the absolute of the data member <code>distance</code> and its sign, i.e., the
+ distance of <code>origin</code> to the <code>Plane</code>, and which side of the
+ <code>Plane</code> it lies on.
+ 
+         <p>It would have been possible to use <code>origin</code> as the default for an
+ optional <code>Point</code> argument, but I've chosen to overload this
+ function, because of problems that may arise, when I implement
+ <code>user_coordinates</code> and <code>view_coordinates</code>
+ (see <a href="Point-Data-Members.html#Point-Data-Members">Point Reference; Data Members</a>).
+ 
+      <pre class="example">          Point N(0, 1);
+           N.rotate(-10, 20, 20);
+           Point P(1, 1, 1);
+           Plane q(P, N);
+           Point A(4, -2, 4);
+           Point B(-1, 3, 2);
+           Point C = q.intersection_point(A, B).pt;
+           real_short bp;
+           
+           bp = q.get_distance();
+           cout &lt;&lt; bp.first;
+           -| 0.675646
+           cout &lt;&lt; bp.second
+           -| -1
+           
+           bp = q.get_distance(A)
+           cout &lt;&lt; bp.first;
+           -| 3.40368
+           cout &lt;&lt; bp.second;
+           -|  -1
+           
+           bp = q.get_distance(B)
+           cout &lt;&lt; bp.first;
+           -| 2.75865
+           cout &lt;&lt; bp.second;
+           -| 1
+           
+           bp = q.get_distance(C)
+           cout &lt;&lt; bp.first;
+           -| 0
+           cout &lt;&lt; bp.second;
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF106.png"
+ alt="[Figure 106. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 106. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Showing.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Showing.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Planes-Showing.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Planes-Showing.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,85 ----
+ <html lang="en">
+ <head>
+ <title>Planes Showing - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Reference.html#Plane-Reference" title="Plane Reference">
+ <link rel="prev" href="Plane-Intersections.html#Plane-Intersections" title="Plane Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Planes-Showing"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">25.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-524"></a></var><br>
+ <blockquote><p>Prints information about the <code>Plane</code> to standard output. 
+ If <var>text</var> is not the empty <code>string</code>, it is printed to the
+ standard output.  Otherwise,
+ &lsquo;<samp><span class="samp">Plane:</span></samp>&rsquo; is printed. 
+ Following this,
+ if the <code>Plane</code> is equal to <code>INVALID_PLANE</code>
+ (see <a href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Reference; Global Constants</a>),
+ a message to this effect is printed to standard output. 
+ Otherwise, <code>normal</code> and
+ <code>point</code> are shown using <code>Point::show()</code>
+ (see <a href="Showing-Points.html#Showing-Points">Point Reference; Showing</a>).  Finally,
+ <code>distance</code> is printed.
+ 
+      <pre class="example">          Point A(1, 3, 2.5);
+           Rectangle r0(A, 5, 5, 10, 15, 6);
+           Plane p = r0.get_plane();
+           -| p:
+              normal: (-0.0582432, 0.984111, -0.167731)
+              point: (-0.722481, 2.38245, -0.525176)
+              distance == -2.47476
+ </pre>
+         </blockquote></div>
+ 
+ <!-- path.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,121 ----
+ <html lang="en">
+ <head>
+ <title>Point Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables" title="Point Global Constants and Variables">
+ <link rel="next" href="Point-Destructor.html#Point-Destructor" title="Point Destructor">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Destructor.html#Point-Destructor">Point Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.4 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Point</b> (<var>void</var>)<var><a name="index-Point-375"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and initializes its x, y, and z-coordinates
+ to 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Point</b> (<var>const real x, </var>[<var>const real y = </var><code>CURR_Y</code><var>, </var>[<var>const real z = </var><code>CURR_Z</code>]])<var><a name="index-Point-376"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and initializes its x, y, and z-coordinates
+ to the values of the arguments <var>x</var>, <var>y</var>, and <var>z</var>.  The
+ arguments <var>y</var> and <var>z</var> are optional.  If they are not specified,
+ the values of <code>CURR_Y</code> and <code>CURR_Z</code> are used.  They are 0 by
+ default, but can be changed by the user.  This can be convenient, if all
+ of the <code>Points</code> being drawn in a particular section of a program
+ have the same z or y and z values. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real x, </var>[<var>const real y = </var><code>CURR_Y</code><var>, </var>[<var>const real z = </var><code>CURR_Z</code>]])<var><a name="index-set-377"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above, but is used for resetting the coordinates of an existing
+ <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Point</b> (<var>const Point&amp; p</var>)<var><a name="index-Point-378"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and copies the values for its x, y, and z-coordinates
+ from <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p</var>)<var><a name="index-set-379"></a></var><br>
+ <blockquote><p>Corresponds to the copy constructor above, but is used for resetting the coordinates
+ of an existing <code>Point</code>.  This function exists purely as a convenience;
+ the operator <code>operator=()</code>
+ (see <a href="Point-Operators.html#Point-Operators">Point Reference; Operators</a>)
+ performs exactly the
+ same function. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Point* <b>create_new&lt;Point&gt;</b> (<var>const Point* p</var>)<var><a name="index-create_005fnew_003cPoint_003e-380"></a></var><br>
+ &mdash; : Point* <b>create_new&lt;Point&gt;</b> (<var>const Point&amp; p</var>)<var><a name="index-create_005fnew_003cPoint_003e-381"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Points</code>. 
+ They create a <code>Point</code> on the free store and allocate memory for it using
+ <code>new(Point)</code>.  They return a pointer to the new <code>Point</code>.
+ 
+         <p>If <var>p</var> is a non-zero pointer or a reference,
+ the new <code>Point</code> will be a copy of
+ <var>p</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Point&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+         <p>One use for <code>create_new&lt;Point&gt;</code> is in the constructors for
+ <code>classes</code> of
+ objects that can contain a variable number of <code>Points</code>, such as
+ <code>Path</code> and <code>Polygon</code>.  Another use is in the drawing and
+ filling functions, where objects are copied and the copies put onto a
+ <code>Picture</code>.
+ 
+         <p>Programmers who dynamically allocate <code>Points</code> must ensure that they
+ are deallocated properly using <code>delete</code>! 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Point Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="next" href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures" title="Point Typedefs and Utility Structures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Reference.html#Point-Reference">Point Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>world_coordinates</b><var><a name="index-world_005fcoordinates-340"></a></var><br>
+ <blockquote><p>The set of four homogeneous coordinates x, y, z, and w that represent
+ the position of the <code>Point</code> within 3DLDF's global coordinate
+ system. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>projective_coordinates</b><var><a name="index-projective_005fcoordinates-341"></a></var><br>
+ <blockquote><p>The set of four homogeneous coordinates x, y, z, and w that represent
+ the position of the <em>projection</em> of the <code>Point</code> onto a
+ two-dimensional plane for output.  The x and y values are used in the
+ MetaPost code written to <code>out_stream</code>.  The z value is used
+ in the hidden surface algorithm (which is currently rather primitive and
+ doesn't work very well.  see <a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>).  The w value can be
+ != 1
+ ,
+ depending on the projection used;  the perspective projection is
+ non-affine, so w can take on other values. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>user_coordinates</b><var><a name="index-user_005fcoordinates-342"></a></var><br>
+ <blockquote><p>A set of four homogeneous coordinates x, y, z, and w.
+ 
+         <p><code>user_coordinates</code> currently has no function. 
+ It is intended for use in user-defined coordinate systems.  For example,
+ a coordinate system could be defined with respect to a plane surface
+ that isn't parallel to one of the major planes.  Such a coordinate
+ system would be convenient for drawing on the plane.  A <code>Transform</code>
+ would make it possible to convert between <code>user_coordinates</code> and
+ <code>world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>view_coordinates</b><var><a name="index-view_005fcoordinates-343"></a></var><br>
+ <blockquote><p>A set of four homogeneous coordinates x, y, z, and w.
+ 
+         <p><code>view_coordinates</code> currently has no function.  It may be useful for
+ displaying multiple views in an interactive graphical user interface, or
+ for some other purpose. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-344"></a></var><br>
+ <blockquote><p>Contains the product of the transformations applied to the <code>Point</code>. 
+ When <code>apply_transform()</code> is called for the <code>Point</code>, directly
+ or indirectly, the <code>world_coordinates</code> are updated and
+ <code>transform</code> is reset to the identity <code>Transform</code>. 
+ See <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-345"></a></var><br>
+ <blockquote><p>Returns <code>on_free_store</code>.  This should only be <code>true</code> if
+ the <code>Point</code> was dynamically allocated on the
+ free store.  <code>Points</code> should only ever be dynamically
+ allocated by <code>create_new&lt;Point&gt;()</code>, which
+ uses <code>set_on_free_store()</code> to set <code>on_free_store</code>
+ to <code>true</code>. 
+ See <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>, and
+ <a href="Modifying-Points.html#Modifying-Points">Point Reference; Modifying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: signed short <b>drawdot_value</b><var><a name="index-drawdot_005fvalue-346"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what MetaPost drawing command
+ (<code>drawdot()</code> or <code>undrawdot()</code>) to write to <code>out_stream</code>
+ when outputting a <code>Point</code>.
+ 
+         <p>When <code>drawdot()</code> or <code>undrawdot()</code> is called on a <code>Point</code>,
+ the <code>Point</code> is copied and put onto the <code>Picture</code>, which was
+ passed to
+ <code>drawdot()</code> or <code>undrawdot()</code> as an argument
+ (<code>current_picture</code> by
+ default).  <code>drawdot_value</code> is either set to <code>Shape::DRAWDOT</code>
+ or <code>Shape::UNDRAWDOT</code> on the copy; <code>this-&gt;drawdot</code> is
+ not set. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: const Color* <b>drawdot_color</b><var><a name="index-drawdot_005fcolor-347"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what string to write to <code>out_stream</code>
+ for the color when outputting a <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>pen</b><var><a name="index-pen-348"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what string to write to <code>out_stream</code>
+ for the pen when outputting a <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-349"></a></var><br>
+ <blockquote><p>A set of 6 <code>real</code> values indicating the maximum and minumum x, y,
+ and
+ z-coordinates of the <code>Point</code>. 
+ Used for determining whether a <code>Point</code> is projectable with the
+ parameters of a particular invocation of <code>Picture::output()</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>.
+ 
+         <p>Obviously, the maxima and minima
+ will always be the same for a <code>Point</code>, namely the x, y, and
+ z-coordinates. 
+ However, <code>set_extremes()</code> and <code>get_extremes()</code>,
+ the functions that access <code>projective_extremes</code>, are pure virtual
+ functions in <code>class Shape</code>,
+ so the <code>Point</code> versions must be consistent with the versions for
+ other types derived from <code>Shape</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-350"></a></var><br>
+ <blockquote><p><code>true</code> by default.  Set to <code>false</code> by <code>suppress_output()</code>,
+ which is called on a <code>Shape</code> by <code>Picture::output()</code>, if the
+ <code>Shape</code> is not projectable. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: string <b>measurement_units</b><var><a name="index-measurement_005funits-351"></a></var><br>
+ <blockquote><p>The unit of measurement for all distances within a <code>Picture</code>,
+ <code>"cm"</code> (for centimeters) by default.  The x and y-coordinates of
+ the  projected <code>Points</code> are always followed by <code>measurement_units</code>
+ when they're written to <code>out_stream</code>.  Unlike Metafont, units of
+ measurement cannot be indicated for individual coordinates.  Nor can
+ <code>measurement_unit</code> be changed within a <code>Picture</code>.
+ 
+         <p>When I write an input routine, I plan to make it behave the way Metafont
+ does, however, 3DLDF will probably also convert all of the input values
+ to a standard unit, as Metafont does. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: real <b>CURR_Y</b><var><a name="index-CURR_005fY-352"></a></var><br>
+ &mdash; Public static variable: real <b>CURR_Z</b><var><a name="index-CURR_005fZ-353"></a></var><br>
+ <blockquote><p>Default values for the y and z-coordinate of <code>Points</code>, when the
+ x-coordinate, or the x and y-coordinates only are specified. 
+ Both are 0 by default.
+ 
+         <p>These values only used in the constructor and setting function taking
+ one required <code>real</code> value (for the x-coordinate), and two optional
+ <code>real</code> values (for the y and z-coordinates).  They are not used
+ when a <code>Point</code> is declared using the
+ default constructor with no arguments.  In this case, the x, y, and
+ z-coordinates will all be 0. 
+ See <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          Point A(1);
+           A.show("A:");
+           -| A: (1, 0, 0);
+           CURR_Y = 5;
+           A.set(2);
+           A.show("A:");
+           -| A: (2, 5, 0);
+           CURR_Z = 12;
+           Point B(3);
+           B.show("B:");
+           -| B: (3, 5, 12);
+           Point C;
+           C.show("C:");
+           -| C: (0, 0, 0);
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Destructor.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Destructor.html
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--- 1,64 ----
+ <html lang="en">
+ <head>
+ <title>Point Destructor - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions" title="Point Constructors and Setting Functions">
+ <link rel="next" href="Point-Operators.html#Point-Operators" title="Point Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Destructor"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Operators.html#Point-Operators">Point Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.5 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Point</b> (<code>void</code>)<var><a name="index-g_t_007ePoint-382"></a></var><br>
+ <blockquote><p>This function currently has an empty definition, but its existence
+ prevents GCC 3.3 from issuing the following warning:
+ &ldquo;`class Point' has virtual functions but non-virtual destructor&rdquo;. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Drawing-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Drawing-Functions.html
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+ <html lang="en">
+ <head>
+ <title>Point Drawing Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Intersections.html#Point-Intersections" title="Point Intersections">
+ <link rel="next" href="Labelling-Points.html#Labelling-Points" title="Labelling Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Drawing-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Labelling-Points.html#Labelling-Points">Labelling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Intersections.html#Point-Intersections">Point Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.18 Drawing</h3>
+ 
+ <p>There are two versions for each of the drawing functions.  The second
+ one has the <code>Picture</code> argument <var>picture</var> at the beginning of the
+ argument list, rather than at the end.  This is convenient when passing
+ a <code>picture</code> argument.  Where <var>picture</var> is optional, the default
+ is always <code>current_picture</code>.
+ 
+    <p><a name="index-output-file-441"></a><a name="index-file_002c-output-442"></a><a name="index-pen-expression-443"></a>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>drawdot</b> ([<var>const Color&amp; ddrawdot_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-drawdot-444"></a></var><br>
+ &mdash; <code>const</code> function: void <b>drawdot</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddrawdot_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ppen = "", </var>]]])<var><a name="index-drawdot-445"></a></var><br>
+ <blockquote><p>Draws a dot on <var>picture</var>.  If <var>ppen</var> is specified, a &ldquo;pen
+ expression&rdquo; is included in the <code>drawdot</code> command written to
+ <code>out_stream</code>.  Otherwise, MetaPost's <code>currentpen</code> is used. 
+ If <var>ddrawdot_color</var> is specified, the dot will be drawn using that
+ <code>Color</code>.  Otherwise, the <code>Color</code> currently pointed to by the pointer
+ <code>Colors::default_color</code> will be used.  This will normally be
+ <code>Colors::black</code>.  See <a href="Color-Reference.html#Color-Reference">Color Reference</a>, for more information
+ about <code>Colors</code> and the <code>namespace Colors</code>.
+ 
+         <p>Please note that the &ldquo;dot&rdquo; will always be parallel to the plane of
+ projection.  Even where it appears to be a surface, as in [next figure]
+ , it
+ is never put into perspective, but will always have the same size and
+ shape.
+ 
+      <pre class="example">          Point P(1, 1);
+           P.drawdot(gray, "pensquare scaled 1cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF96.png"
+ alt="[Figure 96. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 96. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undrawdot</b> ([<var>string pen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-undrawdot-446"></a></var><br>
+ &mdash; Function: void <b>undrawdot</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>string pen = ""</var>]])<var><a name="index-undrawdot-447"></a></var><br>
+ <blockquote><p>Undraws a dot on <var>picture</var>.  If <var>ppen</var> is specified, a &ldquo;pen
+ expression&rdquo; is included in the <code>undrawdot</code> command written to
+ <code>out_stream</code>.  Otherwise, MetaPost's <code>currentpen</code> is used.
+ 
+      <pre class="example">          Point P(1, 1);
+           P.drawdot(gray, "pensquare scaled 1cm");
+           P.undrawdot("pencircle scaled .5cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF97.png"
+ alt="[Figure 97. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 97. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>draw</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>bool aarrow = </var><code>false</code>]]]]])<var><a name="index-draw-448"></a></var><br>
+ &mdash; Function: void <b>draw</b> (<var>Picture&amp; picture = </var><code>current_picture</code><var>, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>bool aarrow = </var><code>false</code>]]]])<var><a name="index-draw-449"></a></var><br>
+ <blockquote><p>Draws a line from <code>*this</code> to <var>p</var>. 
+ Returns the <code>Path *this -- p1</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ for more information.
+ 
+      <pre class="example">          Point P(-1, -1, -1);
+           Point Q(2, 3, 5);
+           P.draw(Q, Colors::gray, "", "pensquare scaled .5cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF98.png"
+ alt="[Figure 98. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 98. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undraw</b> (<var>const Point&amp; p, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-450"></a></var><br>
+ &mdash; Function: void <b>undraw</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]])<var><a name="index-undraw-451"></a></var><br>
+ <blockquote><p>Undraws a line from <code>*this</code> to <var>p</var>. 
+ Returns the <code>Path *this -- p1</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ for more information.
+ 
+      <pre class="example">          Point P(-1, -1, -1);
+           Point Q(2, 3, 5);
+           P.draw(Q, Colors::gray, "", "pensquare scaled .5cm");
+           P.undraw(Q, "evenly scaled 6", "pencircle scaled .3cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF99.png"
+ alt="[Figure 99. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 99. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    <p><a name="index-help-lines-452"></a>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>draw_help</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = *Colors::help_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = current_picture</var>]]]])<var><a name="index-draw_005fhelp-453"></a></var><br>
+ &mdash; Function: Path <b>draw_help</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = *Colors::help_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw_005fhelp-454"></a></var><br>
+ <blockquote><p>Draws a &ldquo;help line&rdquo; from <code>*this to </code><var>p</var>, but only if the
+ <code>static Path</code> data member <code>do_help_lines</code> is <code>true</code>. 
+ See <a href="Path-Data-Members.html#Path-Data-Members">Path Reference; Data Members</a>.
+ 
+         <p>&ldquo;Help lines&rdquo; are lines that are used when constructing a drawing, but
+ that should not be printed in the final version. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>drawarrow</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-drawarrow-455"></a></var><br>
+ &mdash; Function: Path <b>drawarrow</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-drawarrow-456"></a></var><br>
+ <blockquote><p>Draws an arrow from <code>*this</code> to <var>p</var> and returns
+ the <code>Path</code> <code>*this -- p</code>. 
+ The second version is convenient for passing a <code>Picture</code> argument
+ without having to specify all of the other arguments.
+ 
+      <pre class="example">          Point P(-3, -2, 1);
+           Point Q(3, 3, 5);
+           P.drawarrow(Q);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF100.png"
+ alt="[Figure 100. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 100. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Global-Constants-and-Variables.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Global-Constants-and-Variables.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Global-Constants-and-Variables.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Global-Constants-and-Variables.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,89 ----
+ <html lang="en">
+ <head>
+ <title>Point Global Constants and Variables - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures" title="Point Typedefs and Utility Structures">
+ <link rel="next" href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions" title="Point Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Global-Constants-and-Variables"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.3 Global Constants and Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: Point <b>INVALID_POINT</b><var><a name="index-INVALID_005fPOINT-369"></a></var><br>
+ <blockquote><p>The x, y, and z-values in <code>world_coordinates</code> are all <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: Point <b>origin</b><var><a name="index-origin-370"></a></var><br>
+ <blockquote><p>The x, y, and z-values in <code>world_coordinates</code> are all 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point <b>INVALID_BOOL_POINT</b><var><a name="index-INVALID_005fBOOL_005fPOINT-371"></a></var><br>
+ <blockquote><p><code>b</code> is <code>false</code> and <code>pt</code> is <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point_pair <b>INVALID_BOOL_POINT_PAIR</b><var><a name="index-INVALID_005fBOOL_005fPOINT_005fPAIR-372"></a></var><br>
+ <blockquote><p><code>first</code> and <code>second</code> are both <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_real_point <b>INVALID_BOOL_REAL_POINT</b><var><a name="index-INVALID_005fBOOL_005fREAL_005fPOINT-373"></a></var><br>
+ <blockquote><p><code>b</code> is <code>false</code>, <code>r</code> is <code>INVALID_REAL</code>, and <code>pt</code>
+ is <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point_quadruple <b>INVALID_BOOL_POINT_QUADRUPLE</b><var><a name="index-INVALID_005fBOOL_005fPOINT_005fQUADRUPLE-374"></a></var><br>
+ <blockquote><p><code>first</code>, <code>second</code>, <code>third</code>, and <code>fourth</code> are all
+ <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Intersections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Intersections.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Intersections.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,119 ----
+ <html lang="en">
+ <head>
+ <title>Point Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Points-and-Lines.html#Points-and-Lines" title="Points and Lines">
+ <link rel="next" href="Point-Drawing-Functions.html#Point-Drawing-Functions" title="Point Drawing Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Intersections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.17 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: bool_point <b>intersection_point</b> (<var>Point p0, Point p1, Point q0, Point q1</var>)<var><a name="index-intersection_005fpoint-439"></a></var><br>
+ &mdash; Static function: bool_point <b>intersection_point</b> (<var>Point p0, Point p1, Point q0, Point q1, const bool trace</var>)<var><a name="index-intersection_005fpoint-440"></a></var><br>
+ <blockquote><p>These functions find the intersection point, if any, of the lines determined by
+ <var>p0</var> and <var>p1</var> on the one hand, and <var>q0</var> and <var>q1</var> on the other.
+ 
+         <p>Let <code>bp</code> be the <code>bool_point</code> returned by
+ <code>intersection_point()</code>.  If an intersection point is found, the
+ corresponding <code>Point</code> will be stored in <code>bp.pt</code>, otherwise,
+ <code>bp.pt</code> will be set to <code>INVALID_POINT</code>.  If the intersection
+ point lies on both of the line segments, <code>bp.b</code> will be
+ <code>true</code>, otherwise, <code>false</code>.
+ 
+         <p>The two versions use different methods of finding the intersection
+ point.  The first uses a vector calculation, the second looks for the
+ intersections of the traces of the lines on the major planes.  If the
+ <var>trace</var> argument is used, the second version will be called, whether
+ <var>trace</var> is <code>true</code> or <code>false</code>.  Ordinarily, there should be
+ no need to use the trace version.
+ 
+      <pre class="example">          Point A(-1, -1);
+           Point B(1, 1);
+           Point C(-1, 1);
+           Point D(1, -1);
+           bool_point bp = Point::intersection_point(A, B, C, D);
+           bp.pt.dotlabel("$i$");
+           cout &lt;&lt; "bp.b == " &lt;&lt; bp.b &lt;&lt; endl &lt;&lt; flush;
+           -| bp.b == 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF94.png"
+ alt="[Figure 94. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 94. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point A(.5, .5);
+           Point B(1.5, 1.5);
+           Point C(-1, 1);
+           Point D(1, -1);
+           bool_point bp = Point::intersection_point(A, B, C, D, true);
+           bp.pt.dotlabel("$i$");
+           cout &lt;&lt; "bp.b == " &lt;&lt; bp.b &lt;&lt; endl &lt;&lt; flush;
+           -| bp.b == 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF95.png"
+ alt="[Figure 95. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 95. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,210 ----
+ <html lang="en">
+ <head>
+ <title>Point Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Destructor.html#Point-Destructor" title="Point Destructor">
+ <link rel="next" href="Copying-Points.html#Copying-Points" title="Copying Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Copying-Points.html#Copying-Points">Copying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Destructor.html#Point-Destructor">Point Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.6 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_003d-383"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-384"></a></var><br>
+ <blockquote><p>Multiplies <code>transform</code> by <var>t</var>. 
+ By multiplying a <code>Point</code> successively by
+ one or more <code>Transforms</code>, the effect of the transformations is
+ &ldquo;saved up&rdquo; in <code>transform</code>.  Only when an operation that needs
+ updated values for the <code>world_coordinates</code> is called on a
+ <code>Point</code>, or the <code>Point</code> is passed as an argument to such an
+ operation, is the transformation stored in <code>transform</code> applied to
+ <code>world_coordinates</code> by <code>apply_transform()</code>,
+ which subsequently, resets <code>transform</code> to
+ the identity <code>Transform</code>. 
+ See <a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator+</b> (<var>Point p</var>)<var><a name="index-operator_002b-385"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with <code>world_coordinates</code> that are the sums of
+ the corresponding <code>world_coordinates</code> of <code>*this</code> and <var>p</var>,
+ after they've been updated. 
+ <code>*this</code> remains unchanged; as in many other functions with
+ <code>Point</code> arguments, <var>p</var> is passed by value, because
+ <code>apply_transform()</code> must be called on it, in order to update its
+ <code>world_coordinates</code>.  If <var>p</var> were a <code>const Point&amp;</code>, it
+ would have to copied within the function anyway, because
+ <code>apply_transform()</code> is a non-<code>const</code> operation.
+ 
+      <pre class="example">          Point p0(-2, -6, -28);
+           Point p1(3, 14, 92);
+           Point p2(p0 + p1);
+           p2.show("p2:");
+           -| p2: (1, 8, 64)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Point p</var>)<var><a name="index-operator_002b_003d-386"></a></var><br>
+ <blockquote><p>Adds the updated <code>world_coordinates</code> of <var>p</var> to those of
+ <code>*this</code>. 
+ Equivalent in effect to <code>shift(</code><var>p</var><code>)</code>
+ In fact, this
+ function merely calls <code>p.apply_transform()</code> and
+ <code>Point::shift(real, real, real)</code> with <var>p</var>'s x, y, and z
+ coordinates (from <code>world_coordinates</code>) as its arguments. 
+ See <a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator-</b> (<var>Point p</var>)<var><a name="index-operator_002d-387"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with <code>world_coordinates</code> representing the
+ difference between the updated values of
+ <code>this-&gt;world_coordinates</code><!-- /@w --> and
+ <var>p</var><code>.world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator-=</b> (<var>Point p</var>)<var><a name="index-operator_002d_003d-388"></a></var><br>
+ <blockquote><p>Subtracts the updated values of <var>p</var><code>.world_coordinates</code> from
+ those of <code>this-&gt;world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: real <b>operator*=</b> (<var>const real r</var>)<var><a name="index-operator_002a_003d-389"></a></var><br>
+ <blockquote><p>Multiplies the updated x, y, and z coordinates (<code>world_coordinates</code>) of
+ the <code>Point</code> by <var>r</var> and returns <var>r</var>.  This makes it possible to
+ chain invocations of this function.
+ 
+         <p>If <code>P</code> is a <code>Point</code> then
+ <code>P *= </code><var>r</var> is
+ equivalent in its effect to <code>P.scale(</code><var>r</var><code>, </code><var>r</var><code>, </code><var>r</var><code>)</code>,
+ except that
+ <code>P.world_coordinates</code> is modified directly and immediately,
+ without changing <code>P.transform</code>.  This is possible, because this
+ function calls <code>apply_transform()</code> to update the
+ <code>world_coordinates</code> before multiplying them <code>r</code>, so
+ <code>transform</code> is the identity <code>Transform</code>.
+ 
+      <pre class="example">          Point P(1, 2, 3);
+           P *= 7;
+           P.show("P:");
+           -| P: (7, 14, 21);
+           Point Q(1.5, 2.7, 13.82);
+           Q *= P *= -1.28;
+           P.show("P:");
+           -| P: (-8.96, -17.92, -26.88)
+           Q.show("Q:");
+           -| Q: (-1.92, -3.456, -17.6896)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator*</b> (<var>const real r</var>)<var><a name="index-operator_002a-390"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with x, y, and z coordinates
+ (<code>world_coordinates</code>) equal to the updated x, y, and z coordinates
+ of <code>*this</code> multiplied by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member operator: Point <b>operator*</b> (<var>const real r, const Point&amp; p</var>)<var><a name="index-operator_002a-391"></a></var><br>
+ <blockquote><p>Equivalent to <code>Point::operator*(const real </code><var>r</var><code>)</code> (see above),
+ but with <var>r</var> placed first.
+      <pre class="example">          Point p0(10, 11, 12);
+           real r = 2.5;
+           Point p1 = r * p0;
+           p1.show();
+           -|Point:
+           -|(25, 27.5, 30)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator-</b> (<var>void</var>)<var><a name="index-operator_002d-392"></a></var><br>
+ <blockquote><p>Unary minus (prefix).  Returns a <code>Point</code> with x, y, and z
+ coordinates (<code>world_coordinates</code>) equal to the
+ the x, y, and z-coordinates (<code>world_coordinates</code>) of
+ <code>*this</code> multiplied by -1. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator/=</b> (<var>const real r</var>)<var><a name="index-operator_002f_003d-393"></a></var><br>
+ <blockquote><p>Divides the updated x, y, and z coordinates (<code>world_coordinates</code>) of
+ the <code>Point</code> by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator/</b> (<var>const real r</var>)<var><a name="index-operator_002f-394"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with x, y, and z coordinates
+ (<code>world_coordinates</code>) equal to the updated x, y, and z coordinates
+ of <code>*this</code>
+ divided by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: bool <b>operator==</b> (<var>Point p</var>)<var><a name="index-operator_003d_003d-395"></a></var><br>
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_003d_003d-396"></a></var><br>
+ <blockquote><p>Equality comparison for <code>Points</code>.  These functions return
+ <code>true</code> if the updated values of the <code>world_coordinates</code> of the two
+ <code>Points</code> differ by less than the value returned by
+ <code>Point::epsilon()</code>, otherwise <code>false</code>. 
+ See <a href="Returning-Information-for-Points.html#Returning-Information-for-Points">Point Reference; Returning Information</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_0021_003d-397"></a></var><br>
+ <blockquote><p>Inequality comparison for <code>Points</code>.  Returns <code>false</code> if
+ <code>*this == </code><var>p</var>, otherwise <code>true</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Reference.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,86 ----
+ <html lang="en">
+ <head>
+ <title>Point Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="next" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
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+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">22 Point Reference</h2>
+ 
+ <p><a name="index-Point-339"></a>Class <code>Point</code> is defined in <samp><span class="file">points.web</span></samp>. 
+ It is derived from <code>Shape</code> using <code>protected</code> derivation. 
+ The function
+ <code>Transform Transform::align_with_axis(Point, Point, char)</code>
+ is a <code>friend</code> of <code>Point</code>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a>
+ <li><a accesskey="2" href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>
+ <li><a accesskey="3" href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>
+ <li><a accesskey="4" href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>
+ <li><a accesskey="5" href="Point-Destructor.html#Point-Destructor">Point Destructor</a>
+ <li><a accesskey="6" href="Point-Operators.html#Point-Operators">Point Operators</a>
+ <li><a accesskey="7" href="Copying-Points.html#Copying-Points">Copying Points</a>
+ <li><a accesskey="8" href="Querying-Points.html#Querying-Points">Querying Points</a>
+ <li><a accesskey="9" href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a>
+ <li><a href="Returning-Information-for-Points.html#Returning-Information-for-Points">Returning Information for Points</a>
+ <li><a href="Modifying-Points.html#Modifying-Points">Modifying Points</a>
+ <li><a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a>
+ <li><a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Applying Transformations to Points</a>
+ <li><a href="Projecting-Points.html#Projecting-Points">Projecting Points</a>
+ <li><a href="Vector-Operations.html#Vector-Operations">Vector Operations</a>
+ <li><a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a>
+ <li><a href="Point-Intersections.html#Point-Intersections">Point Intersections</a>
+ <li><a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a>
+ <li><a href="Labelling-Points.html#Labelling-Points">Labelling Points</a>
+ <li><a href="Showing-Points.html#Showing-Points">Showing Points</a>
+ <li><a href="Outputting-Points.html#Outputting-Points">Outputting Points</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Typedefs-and-Utility-Structures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Typedefs-and-Utility-Structures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Point-Typedefs-and-Utility-Structures.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Point-Typedefs-and-Utility-Structures.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,147 ----
+ <html lang="en">
+ <head>
+ <title>Point Typedefs and Utility Structures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Point-Data-Members.html#Point-Data-Members" title="Point Data Members">
+ <link rel="next" href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables" title="Point Global Constants and Variables">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Point-Typedefs-and-Utility-Structures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.2 Typedefs and Utility Structures</h3>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>point_pair</b><var> first second<a name="index-point_005fpair-354"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;Point, Point&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_point</b><var> b pt<a name="index-bool_005fpoint-355"></a></var><br>
+ <blockquote><p><code>b</code> is a <code>bool</code> and <code>pt</code> is a <code>Point</code>. 
+ <code>bool_point</code> also contains two constructors and an assignment
+ operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point</b> (<var>void</var>)<var><a name="index-bool_005fpoint-356"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point</code> and sets <code>b</code> to <code>false</code> and
+ <code>pt</code> to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point</b> (<var>bool bb, const Point&amp; ppt</var>)<var><a name="index-bool_005fpoint-357"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point</code> and sets <code>b</code> to <var>bb</var> and <code>pt</code>
+ to <var>ppt</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_point::operator=</b> (<var>const bool_point&amp; bp</var>)<var><a name="index-bool_005fpoint_003a_003aoperator_003d-358"></a></var><br>
+ <blockquote><p>Sets <code>b</code> to
+ <var>bp</var>.<code>b</code> and <code>pt</code> to <var>bp</var>.<code>pt</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_point_pair</b><var> first second<a name="index-bool_005fpoint_005fpair-359"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair &lt;bool_point, bool_point&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_point_quadruple</b><var> first second third fourth<a name="index-bool_005fpoint_005fquadruple-360"></a></var><br>
+ <blockquote><p>This structure contains four <code>bool_points</code>.  It also has two
+ constructors and an assignment operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point_quadruple</b> (<var>void</var>)<var><a name="index-bool_005fpoint_005fquadruple-361"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point_quadruple</code>, and sets
+ <code>first</code>, <code>second</code>, <code>third</code>, and <code>fourth</code> all to
+ <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>bool_point_quadruple</b> (<var>bool_point a, bool_point b, bool_point c, bool_point d</var>)<var><a name="index-bool_005fpoint_005fquadruple-362"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point_quadruple</code> and sets
+ <code>first</code> to <var>a</var>, <code>second</code> to <var>b</var>, <code>third</code> to
+ <var>c</var>, and <code>fourth</code> to <var>d</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_point_quadruple::operator=</b> (<var>const bool_point_quadruple&amp; arg</var>)<var><a name="index-bool_005fpoint_005fquadruple_003a_003aoperator_003d-363"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>arg</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_real_point</b><var> b r pt<a name="index-bool_005freal_005fpoint-364"></a></var><br>
+ <blockquote><p><code>b</code> is a <code>bool</code>, <code>r</code> is a <code>real</code>, and <code>pt</code> is a
+ <code>Point</code>.  <code>bool_real_point</code> also contains three constructors
+ and an assignment operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_real_point</b> (<var>void</var>)<var><a name="index-bool_005freal_005fpoint-365"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <code>false</code>,
+ <code>r</code> to <code>INVALID_REAL</code> and  <code>pt</code> to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>bool_real_point</b> (<var>const bool_real_point&amp; brp</var>)<var><a name="index-bool_005freal_005fpoint-366"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <var>brp</var>.<code>b</code>,
+ <code>r</code> to <var>brp</var>.<code>r</code>, and  <code>pt</code> to <var>brp</var>.<code>pt</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>bool_real_point</b> (<var>const bool&amp; bb, const real&amp; rr, const Point&amp; ppt</var>)<var><a name="index-bool_005freal_005fpoint-367"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <var>bb</var>,
+ <code>r</code> to <var>rr</var>, and  <code>pt</code> to <var>ppt</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_real_point::operator=</b> (<var>const bool_real_point&amp; brp</var>)<var><a name="index-bool_005freal_005fpoint_003a_003aoperator_003d-368"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>brp</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Points-and-Lines.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Points-and-Lines.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Points-and-Lines.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Points-and-Lines.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,215 ----
+ <html lang="en">
+ <head>
+ <title>Points and Lines - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Vector-Operations.html#Vector-Operations" title="Vector Operations">
+ <link rel="next" href="Point-Intersections.html#Point-Intersections" title="Point Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Points-and-Lines"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Point-Intersections.html#Point-Intersections">Point Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Vector-Operations.html#Vector-Operations">Vector Operations</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.16 Points and Lines</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>get_line</b> (<var>const Point&amp; p</var>)<var><a name="index-get_005fline-433"></a></var><br>
+ <blockquote><p>Returns the <code>Line</code> <var>l</var> corresponding to the line from <code>*this</code> to
+ <var>p</var>.  <var>l</var>.<code>position</code> will be <code>*this</code>, and
+ <var>l</var>.<code>direction</code> will be <var>p</var> - <code>*this</code>. 
+ See <a href="Line-Reference.html#Line-Reference">Line Reference</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>slope</b> (<var>Point p, </var>[<var>char m = 'x', </var>[<var>char n = 'y'</var>]])<var><a name="index-slope-434"></a></var><br>
+ <blockquote><p>Returns a <code>real</code> number representing the slope of the <em>trace</em>
+ of the line defined by
+ <code>*this</code> and <var>p</var> on the plane indicated by the arguments <var>m</var>
+ and <var>n</var>.
+ 
+      <pre class="example">          Point p0(3, 4, 5);
+           Point p1(2, 7, 12);
+           real r = p0.slope(p1, 'x', 'y');
+           &rArr; r == -3
+           r = p0.slope(p1, 'x', 'z');
+           &rArr; r == -7
+           r = p0.slope(p1, 'z', 'y');
+           &rArr; r == 0.428571
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool_real <b>is_on_segment</b> (<var>Point p0, Point p1</var>)<var><a name="index-is_005fon_005fsegment-435"></a></var><br>
+ &mdash; <code>const</code> function: bool_real <b>is_on_segment</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-is_005fon_005fsegment-436"></a></var><br>
+ <blockquote><p>These functions return a <code>bool_real</code>, where the <code>bool</code> part is
+ <code>true</code>, if
+ the <code>Point</code> lies on the line segment between <var>p0</var> and <var>p1</var>,
+ otherwise <code>false</code>.  If the <code>Point</code> lies on the line segment, the
+ <code>real</code> part is a value
+ r such that
+ 0 &lt;= r &lt;= 1
+ indicating how far the <code>Point</code> is along the way from
+ <var>p0</var> to <var>p1</var>.  For example, if the <code>Point</code> is half of the way
+ from <var>p0</var> to <var>p1</var>, r will be .5.  If the <code>Point</code>
+ does not lie on the line
+ segment, but on the <em>line</em> passing through <var>p0</var> and <var>p1</var>,
+ r will be &lt;0 or &gt;1.
+ 
+         <p>If the <code>Point</code> doesn't lie on the line passing through <var>p0</var> and
+ <var>p1</var>,
+ r will be <code>INVALID_REAL</code>.
+ 
+      <pre class="example">          Point p0(-1, -2, 1);
+           Point p1(3, 2, 5);
+           Point p2(p0.mediate(p1, .75));
+           Point p3(p0.mediate(p1, 1.5));
+           Point p4(p2);
+           p4.shift(-2, 1, -1);
+           bool_real br = p2.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 1
+           cout &lt;&lt; br.second;
+           -| 0.75
+           bool_real br = p3.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 0
+           cout &lt;&lt; br.second;
+           -| 1.5
+           bool_real br = p4.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 0
+           cout &lt;&lt; br.second;
+           -| 3.40282e+38
+           cout &lt;&lt; (br.second == INVALID_REAL)
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF91.png"
+ alt="[Figure 91. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 91. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_real <b>is_on_line</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-is_005fon_005fline-437"></a></var><br>
+ <blockquote><p>Returns a <code>bool_real</code> where the <code>bool</code> part is <code>true</code>, if
+ the <code>Point</code> lies on the line passing through <var>p0</var> and <var>p1</var>,
+ otherwise <code>false</code>.  If the <code>Point</code> lies on the line, the
+ <code>real</code> part is a value r indicating how how far the <code>Point</code>
+ is along the way from <var>p0</var> to <var>p1</var>, otherwise
+ <code>INVALID_REAL</code>.  The following
+ values of r are possible for a call to <code>P.is_on_line(A, B)</code>,
+ where the <code>Point</code> P lies on the line
+ AB:
+ 
+      <pre class="display">          P == A &mdash;&gt; r== 0.
+           
+           P == B &mdash;&gt; r== 1.
+           
+           P lies on the opposite side of A from B &mdash;&gt; r &lt; 0.
+           
+           P lies between A and B &mdash;&gt; 0 &lt;  r &lt; 1.
+           
+           P lies on the opposite side of A from B &mdash;&gt; r &gt; 1
+ </pre>
+         <pre class="example">          Point A(-1, -2);
+           Point B(2, 3);
+           Point C(B.mediate(A, 1.25));
+           bool_real br = C.is_on_line(A, B);
+           Point D(A.mediate(B));
+           br = D.is_on_line(A, B);
+           Point E(A.mediate(B, 1.25));
+           br = E.is_on_line(A, B);
+           Point F(D);
+           F.shift(-1, 1);
+           br = F.is_on_line(A, B);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF92.png"
+ alt="[Figure 92. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 92. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>mediate</b> (<var>Point p, </var>[<var>const real r = .5</var>])<var><a name="index-mediate-438"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> <var>r</var> of the way from <code>*this</code> to <var>p</var>.
+ 
+      <pre class="example">          Point p0(-1, 0, -1);
+           Point p1(10, 0, 10);
+           Point p2(5, 5, 5);
+           Point p3 = p0.mediate(p1, 1.5);
+           p3.show("p3:");
+           -| p3: (15.5, 0, 15.5)
+           Point p4 = p0.mediate(p2, 1/3.0);
+           p4.show("p4:");
+           -| p4: (1, 1.66667, 1)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF93.png"
+ alt="[Figure 93. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 93. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Points.html
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*** 0 ****
--- 1,61 ----
+ <html lang="en">
+ <head>
+ <title>Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Using-3DLDF.html#Using-3DLDF" title="Using 3DLDF">
+ <link rel="next" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Using-3DLDF.html#Using-3DLDF">Using 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">2 Points</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>
+ <li><a accesskey="2" href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polygon-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Polygon Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="prev" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="next" href="Polygon-Operators.html#Polygon-Operators" title="Polygon Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polygon-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Polygon-Operators.html#Polygon-Operators">Polygon Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">27.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>center</b><var><a name="index-center-637"></a></var><br>
+ <blockquote><p>The center of the <code>Polygon</code>, if it has one.  However, a
+ <code>Polygon</code> need not have a <code>center</code>.  If it doesn't,
+ <code>center</code> should be set to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polygon-Intersections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Intersections.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,265 ----
+ <html lang="en">
+ <head>
+ <title>Polygon Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="prev" href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons" title="Affine Transformations for Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polygon-Intersections"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">27.5 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoints-650"></a></var><br>
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-651"></a></var><br>
+ <blockquote><p>These functions find the intersections of the
+ <code>Polygon</code> and a line. 
+ In the first version, the <code>Point</code> arguments are the end points of
+ the line.  The argument to the second version must be a linear
+ <code>Path</code>.
+ 
+         <p>A line and a regular polygon or rectangle<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ can intersect at two points at most. 
+ Let <code>b</code> be a <code>bool_point_pair</code> returned by
+ <code>intersection_points()</code>. 
+ If no
+ intersection points are found, <code>b.first.pt</code> and <code>b.second.pt</code>
+ will be <code>INVALID_POINT</code>, and <code>b.first.b</code> and <code>b.second.b</code>
+ will be <code>false</code>.  If a single intersection point is found, the
+ corresponding <code>Point</code> will be stored in <code>b.first.pt</code>.  If the
+ <code>Point</code> is on the line segment
+ p_0p_1
+ ,
+ <code>b.first.b</code> will be <code>true</code>,
+ otherwise <code>false</code>.  If a second intersection point is found, it
+ will be stored in <code>b.second.pt</code>, and <code>b.second.b</code> is set
+ analogously to <code>b.first.b</code>.
+ 
+         <p>When the <code>Point</code> arguments and the <code>Reg_Polygon</code> are coplanar,
+ as in [next figure]
+ , two intersection points are possible.  In this case,
+ only intersection points of the line with an edge of the
+ <code>Reg_Polygon</code> are returned in the <code>bool_point_pair</code>.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Reg_Polygon r(origin, 5, 3);
+           Transform t;
+           t.rotate(15, 12, 11);
+           t.shift(A);
+           Point P(-2, 0, -1);
+           Point Q(2, 0, 1);
+           P *= Q *= r *= t;
+           bool_point_pair bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$f$", "rt");
+           bpp.second.pt.dotlabel("$s$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF139.png"
+ alt="[Figure 139. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 139. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the lines BC
+  and
+ PQ
+ 
+         <p>are not coplanar with the <code>Reg_Polygon</code> r.  In each case, only
+ one intersection point is possible, and it can be either an intersection
+ with an edge of the
+ <code>Reg_Polygon</code>, or lie within its perimeter.
+ 
+      <pre class="example">          Point B(r.get_point(3).mediate(r.get_point(4)));
+           Point C(B);
+           B.shift(0, 2, .5);
+           C.shift(0, -2, -.5);
+           Point P(-1, -2, -1);
+           Point Q(0, 2, 1);
+           B *= C *= P *= Q *= r *= t;
+           bool_point_pair bpp = r.intersection_points(B, C);
+           bpp.first.pt.dotlabel("$i_0$", "rt");
+           bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$i_1$", "rt");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF140.png"
+ alt="[Figure 140. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 140. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the intersection point of r with the line
+ PQ
+ 
+         <p>does not lie on the line <em>segment</em> PQ.
+ 
+      <pre class="example">          bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$i$", "rt");
+           cout &lt;&lt; "bpp.first.b == " &lt;&lt; bpp.first.b &lt;&lt; endl &lt;&lt; flush;
+           -| bpp.first.b == 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF141.png"
+ alt="[Figure 141. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 141. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: vector&lt;Point&gt; <b>intersection_points</b> (<var>const Polygon&amp; r</var>)<var><a name="index-intersection_005fpoints-652"></a></var><br>
+ <blockquote><p>Finds the intersection points of two <code>Polygons</code>. 
+ Let v be the <code>vector&lt;Point&gt;</code> returned by
+ <code>intersection_points()</code>.  If the <code>Polygons</code> are coplanar,
+ v
+ will contain the intersection points of the edges of the
+ <code>Polygons</code>, as in [next figure]
+ .
+ 
+      <pre class="example">          Rectangle r(origin, 4, 4);
+           Reg_Polygon rp(origin, 5, 5, 0, 36);
+           rp.shift(0, 0, .25);
+           vector &lt;Point&gt; v = r.intersection_points(rp);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF142.png"
+ alt="[Figure 142. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 142. 
+ <br>
+ </p>
+ 
+         <p>If the <code>Polygons</code> lie in parallel planes, there can be no
+ intersection points.  If they lie in non-parallel, non-coplanar planes,
+ <code>intersection_points()</code> first finds the intersection line of the
+ two planes.  Then it finds the intersection points of this line with the
+ two <code>Polygons</code>, if they exist.  There can no more than four
+ intersection points, in this case. 
+ v[0] and v[1] will be the
+ intersection points of the line with <code>*this</code>, while v[2] and
+ v[3] will be the intersection points of the line with <var>r</var>.  If one
+ or more of the intersection points doesn't exist, the corresponding
+ member of v will contain <code>INVALID_POINT</code> as a placeholder.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Rectangle r(A, 4, 4);
+           Reg_Polygon p(A, 5, 5);
+           p.rotate(90, 30);
+           p.shift(2, 0, 3);
+           vector &lt;Point&gt; v = r.intersection_points(p);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF143.png"
+ alt="[Figure 143. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 143. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the <code>Rectangle</code> r and the <code>Reg_Polygon</code> p
+ don't overlap at all, nor does the intersection line of the two planes
+ intersect with p.  However, it does intersect with p at the
+ labelled <code>Points</code>.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Rectangle r(A, 4, 4);
+           Reg_Polygon p(A, 5, 5);
+           p.rotate(90, 30);
+           p.shift(4, 3, 3);
+           vector &lt;Point&gt; v = r.intersection_points(p);
+           int i = 0;
+           for (vector&lt;Point&gt;::iterator iter = v.begin();
+            iter != v.end(); ++iter)
+            iter-&gt;dotlabel(i++, "bot");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF144.png"
+ alt="[Figure 144. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 144. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- regpolyg.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <code>Reg_Polygon</code> and <code>Rectangle</code> are currently the only
+ classes derived from <code>Polygon</code>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polygon-Operators.html
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+ <html lang="en">
+ <head>
+ <title>Polygon Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="prev" href="Polygon-Data-Members.html#Polygon-Data-Members" title="Polygon Data Members">
+ <link rel="next" href="Querying-Polygons.html#Querying-Polygons" title="Querying Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polygon-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Polygons.html#Querying-Polygons">Querying Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polygon-Data-Members.html#Polygon-Data-Members">Polygon Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">27.2 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-638"></a></var><br>
+ <blockquote><p>Multiplies a <code>Polygon</code> by the <code>Transform</code> <var>t</var>. 
+ Similar to <code>Path::operator*=(const Transform&amp; t)</code>, except that
+ <code>center</code> is transformed as well. 
+ See <a href="Path-Operators.html#Path-Operators">Path Reference; Operators</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polygon-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polygon-Reference.html
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+ <html lang="en">
+ <head>
+ <title>Polygon Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="next" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polygon-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Path-Reference.html#Path-Reference">Path Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">27 Polygon Reference</h2>
+ 
+ <p><a name="index-Polygon-636"></a>Class <code>Polygon</code> is defined in <samp><span class="file">polygons.web</span></samp>, and
+ is derived from <code>Path</code>, using public derivation.
+ 
+    <p><code>Polygon</code> is mainly intended for use as a base class for more
+ specialized kinds of polygons.  Currently, the classes
+ <code>Reg_Polygon</code> (regular polygon) and <code>Rectangle</code> are defined. 
+ See <a href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>, and <a href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Polygon-Data-Members.html#Polygon-Data-Members">Polygon Data Members</a>
+ <li><a accesskey="2" href="Polygon-Operators.html#Polygon-Operators">Polygon Operators</a>
+ <li><a accesskey="3" href="Querying-Polygons.html#Querying-Polygons">Querying Polygons</a>
+ <li><a accesskey="4" href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>
+ <li><a accesskey="5" href="Polygon-Intersections.html#Polygon-Intersections">Polygon Intersections</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polyhedron-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polyhedron-Data-Members.html
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*** 0 ****
--- 1,83 ----
+ <html lang="en">
+ <head>
+ <title>Polyhedron Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link rel="prev" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link rel="next" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polyhedron-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">37.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>number_of_polygon_types</b><var><a name="index-number_005fof_005fpolygon_005ftypes-852"></a></var><br>
+ <blockquote><p>The number of different types of polygon making up the faces of a
+ <code>Polyhedron</code>.  The Platonic polyhedra have only one type of face,
+ while the Archimedean can have more. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>face_radius</b><var><a name="index-face_005fradius-853"></a></var><br>
+ <blockquote><p>The radius of the sphere that touches the centers of the polygonal faces
+ of the polyhedron (<em>Inkugel</em>, in German). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>edge_radius</b><var><a name="index-edge_005fradius-854"></a></var><br>
+ <blockquote><p>The radius of the sphere that touches the centers of the edges of the
+ polyhedron. 
+ <!-- ?? GERMAN TERM?? IS IT ALWAYS THE CENTERS?? -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>vertex_radius</b><var><a name="index-vertex_005fradius-855"></a></var><br>
+ <blockquote><p>The radius of the sphere touching the vertices of the polyhedron
+ (<em>Umkugel</em>, in German). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polyhedron-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polyhedron-Getstart.html
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*** 0 ****
--- 1,81 ----
+ <html lang="en">
+ <head>
+ <title>Polyhedron Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Figures.html#Solid-Figures" title="Solid Figures">
+ <link rel="prev" href="Cuboid-Getstart.html#Cuboid-Getstart" title="Cuboid Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polyhedron-Getstart"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Cuboid-Getstart.html#Cuboid-Getstart">Cuboid Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Figures.html#Solid-Figures">Solid Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">8.2 Polyhedron</h3>
+ 
+ <p><a name="index-Polyhedron-64"></a>The <code>class Polyhedron</code> is meant for use only as a base class;
+ no objects of type <code>Polyhedron</code> should be declared.  Instead, there
+ is a class for each of the different drawable polyhedra.  Currently,
+ 3DLDF defines only three: <code>Tetrahedron</code>, <code>Dodecahedron</code>, and
+ <code>Icosahedron</code>.  There's no need for a <code>Cube</code> class, because
+ cubes can be drawn using <code>Cuboid</code> (see <a href="Cuboid-Getstart.html#Cuboid-Getstart">Cuboid Getstart</a>).
+ 
+    <p>Polyhedra have a high priority in my plans for 3DLDF. 
+ I intend to add <code>Octahedron</code> soon, which will complete the set of regular
+ Platonic polyhedra.  Then I will begin adding the semi-regular
+ Archimedean polyhedra, and their duals.
+ 
+    <p>The constructors for the classes derived from <code>Polyhedron</code> follow
+ the pattern familiar from the classes already described.  The constructors
+ for the classes described below have identical arguments:  First, a
+ <code>Point</code> specifying the center, then a <code>real</code> for the
+ diameter of the surrounding circle (<em>Umkreis</em>, in German) of one of
+ its polygonal faces, followed by three
+ <code>real</code> arguments for the angles of rotation about the main axes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Tetrahedron-Getstart.html#Tetrahedron-Getstart">Tetrahedron Getstart</a>
+ <li><a accesskey="2" href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">Dodecahedron Getstart</a>
+ <li><a accesskey="3" href="Icosahedron-Getstart.html#Icosahedron-Getstart">Icosahedron Getstart</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polyhedron-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Polyhedron-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Polyhedron-Reference.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,71 ----
+ <html lang="en">
+ <head>
+ <title>Polyhedron Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Cuboid-Reference.html#Cuboid-Reference" title="Cuboid Reference">
+ <link rel="next" href="Utility-Functions.html#Utility-Functions" title="Utility Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Polyhedron-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Utility-Functions.html#Utility-Functions">Utility Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">37 Polyhedron Reference</h2>
+ 
+ <p><a name="index-Polyhedron-851"></a>Class <code>Polyhedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Solid_Faced</code> using public derivation.  It is
+ intended for use as a base class for specific types of polyhedra. 
+ Currently, the classes <code>Tetrahedron</code>, <code>Dodecahedron</code>,
+ <code>Icosahedron</code>, and <code>Trunc_Octahedron</code> (truncated octahedron)
+ are derived from <code>Polyhedron</code>.
+ 
+    <p>There is a great deal of work left to do on the polyhedra.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a>
+ <li><a accesskey="2" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <li><a accesskey="3" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ports.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ports.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Ports.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Ports.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,117 ----
+ <html lang="en">
+ <head>
+ <title>Ports - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="Caveats.html#Caveats" title="Caveats">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Ports"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Caveats.html#Caveats">Caveats</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.6 Ports</h3>
+ 
+ <p>I originally developed 3DLDF on a DECalpha Personal Workstation with two
+ processors running under the operating system Tru64 Unix 5.1, using the
+ DEC C++
+  compiler. 
+ I then ported it to a PC Pentium 4 running under Linux 2.4, using
+ the GNU C++
+  compiler
+ GCC 2.95.3, and a PC Pentium II XEON under Linux 2.4, using GCC 3.3. 
+ I am currently only maintaining the last version.  I do not believe that
+ it's worthwhile to maintain a version for GCC 2.95.  While I would like
+ 3DLDF to run on as many platforms as possible, I would
+ rather spend my time developing it than porting it. 
+ This is something where I would be grateful for help from other
+ programmers.
+ 
+    <p>Although I am no longer supporting ports to other systems,
+ I have left some conditionally compiled code for
+ managing platform dependencies in the CWEB sources of 3DLDF.  This may
+ make it easier for other people who want to port 3DLDF to other
+ platforms.
+ 
+    <p>Currently, the files <samp><span class="file">io.web</span></samp>, <samp><span class="file">loader.web</span></samp>, <samp><span class="file">main.web</span></samp>,
+ <samp><span class="file">points.web</span></samp>,
+ and  <samp><span class="file">pspglb.web</span></samp> contain conditionally compiled code, depending on
+ which compiler, or in the case of GCC, which version of the compiler, is
+ used.  The DEC C++
+  compiler defines the preprocessor macro
+ &lsquo;<samp><span class="samp">__DECCXX</span></samp>&rsquo; and GCC defines &lsquo;<samp><span class="samp">__GNUC__</span></samp>&rsquo;.  In order to
+ distinguish between GCC 2.95.3 and GCC 3.3, I've added the macros
+ &lsquo;<samp><span class="samp">LDF_GCC_2_95</span></samp>&rsquo; and  &lsquo;<samp><span class="samp">LDF_GCC_3_3</span></samp>&rsquo; in <samp><span class="file">loader.web</span></samp>, which
+ should be defined or undefined, depending on which compiler you're
+ using.  In the distribution,  &lsquo;<samp><span class="samp">LDF_GCC_3_3</span></samp>&rsquo; is defined and
+ &lsquo;<samp><span class="samp">LDF_GCC_2_95</span></samp>&rsquo; is undefined, so if you want to try using GCC 2.95, you'll
+ have to change this (it's not guaranteed to work).
+ 
+    <p>3DLDF 1.1.5.1 now uses Autoconf and Automake, and the
+ <samp><span class="file">configure</span></samp> script generates a <samp><span class="file">config.h</span></samp> file, which is now
+ included in <samp><span class="file">loader.web</span></samp>.  Some of
+ the preprocessor macros defined in <samp><span class="file">config.h</span></samp> are used to
+ conditionally include library header files, but so far, there is no error
+ handling code for the case that a file can't be included.  I hope to improve the
+ way 3DLDF works together with Autoconf and Automake in the near future.
+ 
+    <p>3DLDF 1.1.5 is the first release that contains template functions. 
+ Template instantiation differs from compiler to compiler, so using
+ template functions will tend to make 3DLDF less portable. 
+ See <a href="Template-Functions.html#Template-Functions">Template Functions</a>, for more information. 
+ I am no longer able to build 3DLDF on the DECalpha Personal Workstation. 
+ I'm fairly sure that it would be possible to port it, but
+ I don't plan to do this, since Tru64 Unix 5.1 and the DEC C++
+ 
+    <p>compiler are non-free software.
+ 
+ <!-- Local Variables: -->
+ <!-- mode:Texinfo -->
+ <!-- eval:(outline-minor-mode) -->
+ <!-- End: -->
+ <!-- contrib.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Projecting-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Projecting-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Projecting-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Projecting-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,73 ----
+ <html lang="en">
+ <head>
+ <title>Projecting Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points" title="Applying Transformations to Points">
+ <link rel="next" href="Vector-Operations.html#Vector-Operations" title="Vector Operations">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Projecting-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Vector-Operations.html#Vector-Operations">Vector Operations</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Applying Transformations to Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.14 Projecting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>project</b> (<var>const Focus&amp; f, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]])<var><a name="index-project-425"></a></var><br>
+ &mdash; Function: bool <b>project</b> ([<var>const unsigned short&amp; proj = Projections::PERSP, </var>[<var>real factor = 1</var>]])<var><a name="index-project-426"></a></var><br>
+ <blockquote><p>These functions calculate <code>projective_coordinates</code>. 
+ <var>proj</var> indicates which projection is to be performed. 
+ If it is <code>Projections::PERSP</code>, then <var>f</var> indicates which
+ <code>Focus</code> is to be used (in the first version), or the global variable
+ <code>default_focus</code> is used (in the second).  If
+ <code>Projections::PARALLEL_X_Y</code>, <code>Projections::PARALLEL_X_Z</code>, or
+ <code>Projections::PARALLEL_Z_Y</code> is used, <var>f</var> is ignored, since
+ these projections don't use a <code>Focus</code>.  Currently, no other
+ projections are defined.  The x and y coordinates in
+ <code>projective_coordinates</code> are multiplied by <var>factor</var> with the default
+ being 1. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Projections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Projections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Projections.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Projections.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,106 ----
+ <html lang="en">
+ <head>
+ <title>Projections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Pictures.html#Pictures" title="Pictures">
+ <link rel="prev" href="Pictures.html#Pictures" title="Pictures">
+ <link rel="next" href="Focuses-Getstart.html#Focuses-Getstart" title="Focuses Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Projections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Pictures.html#Pictures">Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Pictures.html#Pictures">Pictures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">9.1 Projections</h3>
+ 
+ <p>In order for a 3D graphic program to be useful, it must be able to
+ make two-dimensional projections of its three-dimensional constructions
+ so that they
+ can be displayed on computer screens and printed out. 
+ These are some of the possible projections:
+ 
+      <dl>
+ <dt>&bull; Parallel projection onto one of the major planes<dd>These projections are trivial, and can be performed by 3DLDF.  They are
+ discussed in the following section.
+ 
+      <br><dt>&bull; Parallel projection onto another plane<dd><!-- !! TO DO: -->
+ I haven't programmed these projections yet, but they might be useful, so
+ I probably will, when I get around to it.
+ 
+      <br><dt>&bull; The perspective projection<dd>This is the projection most people think of, when they think of
+ 3D-graphics.  It is discussed in
+ detail in <a href="The-Perspective-Projection.html#The-Perspective-Projection">The Perspective Projection</a>.
+ 
+      <br><dt>&bull; The isometric and axonometric projections<dd><!-- !! TO DO: -->
+ <a name="index-TO-DO-74"></a>These projections are important for engineering and drafting.  I have
+ not yet implemented them in 3DLDF, but they are on my list of &ldquo;Things
+ To Do&rdquo;. 
+ <!-- !! Get reference, Böttcher and ?? @cite{Technisches Zeichnen}. -->
+ </dl>
+ 
+    <p>The function <code>Picture::output()</code> takes a <code>const unsigned
+ short</code> argument specifying the projection to be used.  The user should
+ probably avoid using explicit <code>unsigned shorts</code>, but should use the
+ constants defined for this purpose in the
+ <dfn>namespace</dfn> <code>Projections</code>.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ The constants are <code>PERSP</code>, <code>PARALLEL_X_Y</code>,
+ <code>PARALLEL_X_Z</code>,
+ <code>PARALLEL_Z_Y</code>, <code>AXON</code>, and <code>ISO</code>.  The latter two should
+ not be used, because the axonometric and isometric projections have not
+ yet been implemented.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Parallel-Projections.html#Parallel-Projections">Parallel Projections</a>
+ <li><a accesskey="2" href="The-Perspective-Projection.html#The-Perspective-Projection">The Perspective Projection</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Namespaces are described in
+ Stroustrup, <cite>The C++
+  Programming Language</cite>, Chapter 8.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Circles.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Circles.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Circles.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Circles.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,99 ----
+ <html lang="en">
+ <head>
+ <title>Querying Circles - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Circle-Reference.html#Circle-Reference" title="Circle Reference">
+ <link rel="prev" href="Circle-Operators.html#Circle-Operators" title="Circle Operators">
+ <link rel="next" href="Circle-Intersections.html#Circle-Intersections" title="Circle Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Circles"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circle-Intersections.html#Circle-Intersections">Circle Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Circle-Operators.html#Circle-Operators">Circle Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">32.4 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_circular</b> (<var>void</var>)<var><a name="index-is_005fcircular-768"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Circle</code> is circular, otherwise
+ <code>false</code>.
+ 
+         <p>Certain transformations, such as shearing and scaling, can cause
+ <code>Circles</code> to become non-circular.
+ 
+      <pre class="example">          Circle c(origin, 3, 90);
+           cout &lt;&lt; c.is_circular();
+           -| 1
+           
+           Circle d = c;
+           d.shift(2.5);
+           d.scale(2, 3);
+           cout &lt;&lt; d.is_circular();
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF176.png"
+ alt="[Figure 176. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 176. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: real <b>get_radius</b> (<code>void</code>)<var><a name="index-get_005fradius-769"></a></var><br>
+ <blockquote><p>Returns <code>radius</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: real <b>get_diameter</b> (<code>void</code>)<var><a name="index-get_005fdiameter-770"></a></var><br>
+ <blockquote><p>Returns
+ 2 * <code>radius</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Colors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Colors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Colors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Colors.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Querying Colors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Showing-Colors.html#Showing-Colors" title="Showing Colors">
+ <link rel="next" href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors" title="Defining and Initializing Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Colors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Colors.html#Showing-Colors">Showing Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.6 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-189"></a></var><br>
+ <blockquote><p>Returns <code>on_free_store</code>.  This will only be true, if the
+ <code>Color</code> was created by <code>create_new&lt;Color&gt;()</code>. 
+ See <a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: real <b>get_red_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fred_005fpart-190"></a></var><br>
+ &mdash; Inline <code>const</code> function: real <b>get_green_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fgreen_005fpart-191"></a></var><br>
+ &mdash; Inline <code>const</code> function: real <b>get_blue_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fblue_005fpart-192"></a></var><br>
+ <blockquote><p>These functions return the <code>red_part</code>, <code>green_part</code>, or
+ <code>blue_part</code> of the <code>Color</code>, respectively.  If <var>decimal</var> is
+ <code>false</code> (the default), the actual <code>real</code> value of the &ldquo;part&rdquo;
+ is returned.  Otherwise, the corresponding whole number
+ n such that
+ 0 &lt;= n &lt;= 255
+ is returned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>get_use_name</b> (<var>void</var>)<var><a name="index-get_005fuse_005fname-193"></a></var><br>
+ <blockquote><p>Returns <code>use_name</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: string <b>get_name</b> (<var>void</var>)<var><a name="index-get_005fname-194"></a></var><br>
+ <blockquote><p>Returns <code>name</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Ellipses.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Ellipses.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,104 ----
+ <html lang="en">
+ <head>
+ <title>Querying Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses" title="Affine Transformations for Ellipses">
+ <link rel="next" href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses" title="Returning Elements and Information for Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_elliptical</b> (<var>void</var>)<var><a name="index-is_005felliptical-734"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Ellipse</code> is elliptical, otherwise
+ <code>false</code>.
+ 
+         <p>Certain transformations, such as shearing and scaling, can cause
+ <code>Ellipses</code> to become non-elliptical. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>is_quadratic</b> (<code>void</code>)<var><a name="index-is_005fquadratic-735"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, because the equation
+ for an ellipse in the x-y plane with its center at the
+ origin is the quadratic equation
+ x^2/a^2 + y^2/b^2 = 1
+ where a is half the horizontal axis
+ and b is half the vertical axis.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 2, 90);
+           e.draw();
+           Point P(e.angle_point(-35));
+           cout &lt;&lt; ((P.get_x() * P.get_x())
+                    / (e.get_axis_h()/2 * e.get_axis_h()/2))
+                   + ((P.get_y() * P.get_y())
+                      / (e.get_axis_v()/2 * e.get_axis_v()/2));
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF163.png"
+ alt="[Figure 163. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 163. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: bool <b>is_cubic</b> (<code>void</code>)<var><a name="index-is_005fcubic-736"></a></var><br>
+ &mdash; : bool <b>is_quartic</b> (<code>void</code>)<var><a name="index-is_005fquartic-737"></a></var><br>
+ <blockquote><p>These functions both return <code>false</code>, because the equation of an
+ ellipse is neither a cubic nor a quartic function. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Focuses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Focuses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Focuses.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Focuses.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,99 ----
+ <html lang="en">
+ <head>
+ <title>Querying Focuses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Modifying-Focuses.html#Modifying-Focuses" title="Modifying Focuses">
+ <link rel="next" href="Showing-Focuses.html#Showing-Focuses" title="Showing Focuses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Focuses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Focuses.html#Showing-Focuses">Showing Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Focuses.html#Modifying-Focuses">Modifying Focuses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.6 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_position</b> (<var>void</var>)<var><a name="index-get_005fposition-490"></a></var><br>
+ <blockquote><p>Returns <code>position</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_direction</b> (<var>void</var>)<var><a name="index-get_005fdirection-491"></a></var><br>
+ <blockquote><p>Returns <code>direction</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_distance</b> (<var>void</var>)<var><a name="index-get_005fdistance-492"></a></var><br>
+ <blockquote><p>Returns <code>distance</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_up</b> (<var>void</var>)<var><a name="index-get_005fup-493"></a></var><br>
+ <blockquote><p>Returns <code>up</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Transform&amp; <b>get_transform</b> (<var>void</var>)<var><a name="index-get_005ftransform-494"></a></var><br>
+ <blockquote><p>Returns <code>transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_transform_element</b> (<var>const unsigned int row, const unsigned int column</var>)<var><a name="index-get_005ftransform_005felement-495"></a></var><br>
+ <blockquote><p>Returns an element of <code>transform</code>, given two <code>unsigned ints</code> for the row
+ and the column. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Transform&amp; <b>get_persp</b> (<var>void</var>)<var><a name="index-get_005fpersp-496"></a></var><br>
+ <blockquote><p>Returns <code>persp</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_persp_element</b> (<var>const unsigned int row, const unsigned int column</var>)<var><a name="index-get_005fpersp_005felement-497"></a></var><br>
+ <blockquote><p>Returns an element of <code>persp</code>, given two <code>unsigned ints</code> for the row
+ and the column. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Paths.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,241 ----
+ <html lang="en">
+ <head>
+ <title>Querying Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Showing-Paths.html#Showing-Paths" title="Showing Paths">
+ <link rel="next" href="Outputting-Paths.html#Outputting-Paths" title="Outputting Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Showing-Paths.html#Showing-Paths">Showing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.15 Querying</h3>
+ 
+ <!-- !! ADD EXAMPLES to the function descriptions in this section. -->
+ <!-- LDF 2003.07.16. -->
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-608"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Path</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool <b>is_planar</b> ([<var>const bool verbose = </var><code>false</code><var>, </var>[<var>string text = ""</var>]])<var><a name="index-is_005fplanar-609"></a></var><br>
+ <blockquote><p>Uses <code>get_normal()</code> to determine
+ whether the <code>Path</code> is planar or not.  Returns <code>true</code>, if it is,
+ otherwise <code>false</code>.  If <var>verbose</var> is <code>true</code>, <var>text</var> is written to
+ standard output, or &ldquo;Path:&rdquo;, if <var>text</var> is the empty string,
+ followed by a message saying whether the <code>Path</code> is planar or not. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_linear</b> ([<var>const bool verbose = </var><code>false</code><var>, </var>[<var>string text = ""</var>]])<var><a name="index-is_005flinear-610"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if <code>line_switch</code> is <code>true</code>.  Otherwise,
+ <code>is_linear()</code> uses <code>get_normal()</code> to determine whether the
+ <code>Path</code> is linear.  If it is, <code>is_linear()</code> returns
+ <code>true</code>, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>is_cycle</b> (<var>void</var>)<var><a name="index-is_005fcycle-611"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Path</code> is cyclical, i.e.,
+ <code>cycle_switch = true</code>, otherwise <code>false</code>.  Only cyclical
+ <code>Paths</code> are fillable. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: int <b>size</b> (<var>void</var>)<var><a name="index-size-612"></a></var><br>
+ <blockquote><p>Returns the number of <code>Points</code> on <code>points</code>, i.e.,
+ <code>points.size()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>get_line_switch</b> (<var>void</var>)<var><a name="index-get_005fline_005fswitch-613"></a></var><br>
+ <blockquote><p>Returns the value of <code>line_switch</code>.  <code>line_switch</code> is only
+ true, if the <code>Path</code> was created, directly or indirectly, using the
+ constructor taking two <code>Point</code> arguments only. 
+ See <a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>slope</b> ([<var>char a = 'x', </var>[<var>char b = 'y'</var>]])<var><a name="index-slope-614"></a></var><br>
+ <blockquote><p>Returns the slope of the <code>Path</code> in the plane indicated by the
+ arguments, if <code>is_linear()</code> returns <code>true</code>.  Otherwise,
+ <code>slope()</code> issues an error message and returns <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>subpath</b> (<var>size_t start, size_t end, </var>[<var>const bool cycle = false, </var>[<var>const string connector = ""</var>]])<var><a name="index-subpath-615"></a></var><br>
+ <blockquote><p>Returns a new <code>Path</code> using <code>points[</code><var>start</var><code>]</code> through
+ <code>points[</code><var>end</var><code> - 1]</code>.  If <var>cycle</var> is <code>true</code>, then the new
+ <code>Path</code> will be a cycle, whether
+ <code>*this</code> is or not.  One optional connector
+ argument can be used.  If it is, it will be the only connector. 
+ Otherwise, the appropriate connectors from <code>*this</code> are used.
+ 
+         <p><var>start</var> must be &lt; <var>end</var>.  It is not possible to
+ have <var>start</var> &gt; <var>end</var>, even if <code>*this</code> is a cycle. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: const Point&amp; <b>get_point</b> (<var>const unsigned short a</var>)<var><a name="index-get_005fpoint-616"></a></var><br>
+ <blockquote><p>Returns the <code>Point</code> <code>*points[</code><var>a</var><code>]</code>, if <var>a</var> &lt;
+ <code>points.size()</code> and the <code>Path</code> is non-empty, otherwise
+ <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: const Point&amp; <b>get_last_point</b> (<var>void</var>)<var><a name="index-get_005flast_005fpoint-617"></a></var><br>
+ <blockquote><p>Returns the <code>Point</code> pointed to by the last pointer on <code>points</code>. 
+ Equivalent to  <code>get_point(get_size() - 1)</code>, but more convenient to
+ type.  Returns <code>INVALID_POINT</code>, if the <code>Path</code> is empty. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: size_t <b>get_size</b> (<var>void</var>)<var><a name="index-get_005fsize-618"></a></var><br>
+ <blockquote><p>Returns <code>points.size()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>get_line</b> (<var>void</var>)<var><a name="index-get_005fline-619"></a></var><br>
+ <blockquote><p>Returns a <code>Line</code> corresponding to the <code>Path</code>, if the latter is
+ linear.  Otherwise, <code>INVALID_LINE</code> is returned. 
+ See <a href="Line-Reference.html#Line-Reference">Line Reference</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Point <b>get_normal</b> (<var>void</var>)<var><a name="index-get_005fnormal-620"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> representing a unit vector in the direction of the
+ normal to the plane of the <code>Path</code>, or <code>INVALID_POINT</code>, if
+ the <code>Path</code> is non-planar.
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 30, 30, 30);
+           Point N = r.get_normal();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF136.png"
+ alt="[Figure 136. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 136. 
+ <br>
+ </p>
+ 
+         <p>In 3DLDF, plane figures generally have constructors taking a |Point|
+ argument for the center, a variable number of |real| arguments for the
+ dimensions, and three |real| arguments for the rotation about the major
+ axes.  The object is first created in the x-z plane, and the
+ <code>Points</code> are generated to be traversed in the counter-clockwise
+ direction, when seen from a <code>Point</code> with a positive y-coordinate. 
+ If no rotation is specified, the normal will point in the direction of
+ the positive y-axis.  If non-zero arguments are used for rotation, the
+ normal will be rotated accordingly.  This direction considered to be
+ &ldquo;outside&rdquo;.  However, according to Huw
+ Jones, <cite>Computer Graphics Through Key Mathematics</cite>, p. 197,
+ &ldquo;outside&rdquo; is considered to be the side of a plane, where the
+ <code>Points</code> are meant to be traversed in the clockwise direction. 
+ I hope that no problems arise from this discrepancy! 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Plane <b>get_plane</b> (<var>void</var>)<var><a name="index-get_005fplane-621"></a></var><br>
+ <blockquote><p>Creates and returns a <code>Plane</code> <var>p</var> corresponding to the <code>Path</code>,
+ if the latter is planar, otherwise <code>INVALID_PLANE</code>. 
+ If the <code>Path</code> is planar, <var>p</var>.<code>point</code> will be the
+ <code>Point</code> pointed to by <code>this-&gt;points[0]</code>. 
+ See <a href="Plane-Reference.html#Plane-Reference">Plane Reference</a>.
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 45, 20, 15);
+           Plane q = r.get_plane();
+           q.show("q:");
+           -| q:
+              normal: (0.0505914, 0.745607, -0.664463)
+              point: (0.0178869, -0.727258, -1.01297)
+              distance == -0.131735
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF137.png"
+ alt="[Figure 137. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 137. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_cycle</b> ([<var>const bool c = </var><code>true</code>])<var><a name="index-set_005fcycle-622"></a></var><br>
+ <blockquote><p>Sets <code>cycle_switch</code> to <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>reverse</b> (<var>bool assign</var>)<var><a name="index-reverse-623"></a></var><br>
+ &mdash; <code>const</code> function: Path <b>reverse</b> (<var>void</var>)<var><a name="index-reverse-624"></a></var><br>
+ <blockquote><p>These functions return a <code>Path</code> with the same <code>Points</code> and
+ connectors as <code>*this</code>, but in reversed order. 
+ <code>reverse()</code> can only be applied to non-cyclical <code>Paths</code>.  If
+ <code>*this</code> is a cycle, <code>reverse()</code> issues an error message and
+ returns <code>*this</code> unreversed.
+ 
+         <p>If the first version is called with <var>assign</var> = <code>true</code>,
+ <code>*this</code> itself is reversed.  If <code>*this</code> should remain
+ unchanged, the <code>const</code> version without an argument should be
+ called.  If, on the other hand, the first version is called with
+ <var>assign</var> = <code>false</code>, a warning message is issued, but the
+ reversed <code>Path</code> is returned just the same, leaving <code>*this</code>
+ unchanged.
+ 
+      <!-- !! ADD EXAMPLE.  LDF 2003.07.16. -->
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Querying Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Copying-Points.html#Copying-Points" title="Copying Points">
+ <link rel="next" href="Returning-Coordinates.html#Returning-Coordinates" title="Returning Coordinates">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Copying-Points.html#Copying-Points">Copying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.8 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>inline</code> function: bool <b>is_identity</b> (<var>void</var>)<var><a name="index-is_005fidentity-399"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if <code>transform</code> is the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Transform <b>get_transform</b> (<var>void</var>)<var><a name="index-get_005ftransform-400"></a></var><br>
+ <blockquote><p>Returns <code>transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-401"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if memory for the <code>Point</code> has been dynamically
+ allocated on the
+ free store, i.e., if the <code>Point</code> has been created using
+ <code>create_new&lt;Point&gt;()</code>. 
+ See <a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_plane</b> (<var>const Plane&amp; p</var>)<var><a name="index-is_005fon_005fplane-402"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Point</code> lies on the
+ <code>Plane</code> <var>p</var>, otherwise <code>false</code>.
+ 
+         <p>Planes are conceived of as having infinite extension, so while
+ the <code>Point</code> C in [next figure]
+  does not lie within
+ the <code>Rectangle</code> r, it does lie on q, so
+ <code>C.is_on_plane(q)</code> returns
+ <code>true</code>.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 20, 45, 35);
+           Plane q = r.get_plane();
+           Point A(2, 0, 2);
+           Point B(2, 1.64143, 2);
+           Point C(0.355028, 2.2185, 6.48628);
+           cout &lt;&lt; A.is_on_plane(q);
+           -| 0
+           cout &lt;&lt; B.is_on_plane(q);
+           -| 1
+           cout &lt;&lt; "C.is_on_plane(q)";
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF80.png"
+ alt="[Figure 80. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 80. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_in_triangle</b> (<var>const Point&amp; p0, const Point&amp; p1, const Point&amp; p2, </var>[<var>bool verbose = </var><code>false</code><var>, </var>[<var>bool test_points = </var><code>true</code>]])<var><a name="index-is_005fin_005ftriangle-403"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if <code>*this</code> lies within the triangle determined by
+ the three <code>Point</code> arguments, otherwise <code>false</code>.
+ 
+         <p>If the code calling <code>is_in_triangle()</code> has ensured that
+ p_0, p_1, and p_2 determine a plane, i.e., that they are not
+ colinear, and that <code>*this</code> lies in that plane, then
+ <code>false</code> can be passed to <code>is_in_triangle()</code> as its
+ <var>test_points</var> argument.
+ 
+         <p>If the <var>verbose</var> argument is <code>true</code>, information resulting from
+ the execution of the function are printed to standard output or standard
+ error.
+ 
+         <p>This function is needed for determining whether a line intersects with a
+ polygon. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> It's unlikely that <code>Points</code> will lie on a <code>Plane</code>,
+ unless the user constructs the case specially. 
+ In [next figure]
+ , the coordinates for B and C were found by using
+ <code>Plane::intersection_point()</code>. 
+ See <a href="Plane-Intersections.html#Plane-Intersections">Planes; Intersections</a>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Polygons.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Polygons.html
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+ <html lang="en">
+ <head>
+ <title>Querying Polygons - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="prev" href="Polygon-Operators.html#Polygon-Operators" title="Polygon Operators">
+ <link rel="next" href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons" title="Affine Transformations for Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Polygons"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polygon-Operators.html#Polygon-Operators">Polygon Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">27.3 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: const Point&amp; <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-639"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-640"></a></var><br>
+ <blockquote><p>These functions return <code>center</code>.  If the <code>Polygon</code> doesn't
+ contain any <code>Points</code>, a warning is issued, and <code>INVALID_POINT</code>
+ is returned. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Rectangles.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Rectangles.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Rectangles.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Querying Rectangles - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles" title="Returning Points for Rectangles">
+ <link rel="next" href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles" title="Ellipses for Rectangles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Rectangles"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.5 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> functions: real <b>get_axis_h</b> (<var>void</var>)<var><a name="index-get_005faxis_005fh-685"></a></var><br>
+ &mdash; : real <b>get_axis_v</b> (<var>void</var>)<var><a name="index-get_005faxis_005fv-686"></a></var><br>
+ <blockquote><p>These functions return <code>axis_h</code> and <code>axis_v</code>, respectively.
+ 
+         <p>Please note, that <code>axis_h</code> and <code>axis_v</code> are currently not
+ recalculated, when a <code>Rectangle</code> is transformed.  I plan to do
+ something about this soon. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_rectangular</b> (<var>void</var>)<var><a name="index-is_005frectangular-687"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Rectangle</code> is rectangular, otherwise
+ <code>false</code>.  Transformations, such as shearing, can cause
+ <code>Rectangles</code> to become non-rectangular. 
+ <!-- !! TO DO:  Add example and illustration. -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Regular-Closed-Plane-Curves.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Regular-Closed-Plane-Curves.html
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+ <html lang="en">
+ <head>
+ <title>Querying Regular Closed Plane Curves - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="prev" href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members" title="Regular Closed Plane Curve Data Members">
+ <link rel="next" href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections" title="Regular Closed Plane Curve Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
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+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Regular-Closed-Plane-Curves"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">30.2 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual functions: bool <b>is_quadratic</b> (<var>void</var>)<var><a name="index-is_005fquadratic-695"></a></var><br>
+ &mdash; : bool <b>is_cubic</b> (<var>void</var>)<var><a name="index-is_005fcubic-696"></a></var><br>
+ &mdash; : bool <b>is_quartic</b> (<var>void</var>)<var><a name="index-is_005fquartic-697"></a></var><br>
+ <blockquote><p>These functions all return <code>false</code>.  They are intended to be
+ overloaded by member functions of derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: real_triple <b>get_coefficients</b> (<var>real Slope, real v_intercept</var>)<var><a name="index-get_005fcoefficients-698"></a></var><br>
+ <blockquote><p>Returns a <code>real_triple</code> with all three values ==
+ <code>INVALID_REAL</code>.  Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: pair&lt;real, real&gt; <b>solve</b> (<var>char axis_unknown, real known</var>)<var><a name="index-solve-699"></a></var><br>
+ <blockquote><p>Returns a <code>pair&lt;real, real&gt;</code> with <code>first</code> =
+ <code>second</code> = <code>INVALID_REAL</code>. 
+ Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: signed short <b>location</b> (<var>Point ref_pt, Point p</var>)<var><a name="index-location-700"></a></var><br>
+ <blockquote><p>Returns a <code>signed short</code> indicating the location of <var>p</var> with
+ respect to the <code>Reg_Cl_Plane_Curve</code>, which must be planar. 
+ The <code>Reg_Cl_Plane_Curve</code> constructors should ensure that
+ <code>Reg_Cl_Plane_Curves</code> are, but there is no guarantee that they will
+ not have been manipulated into a non-planar state, by shearing, for
+ example.
+ 
+         <p>The argument <var>ref_pt</var> is used within the function for
+ shifting a copy of the <code>Reg_Cl_Plane_Curve</code> to a convenient
+ position.  It need not be the |center| of the <code>Reg_Cl_Plane_Curve</code>,
+ however, classes derived from <code>Reg_Cl_Plane_Curve</code> will probably
+ have their own versions of <code>location()</code>, which will pass <code>center</code>
+ as the <var>ref_pt</var> argument to this function. 
+ <code>Reg_Cl_Plane_Curves</code> need not have a meaningful |center|.
+ 
+         <p><code>location()</code> returns the following values:
+           <dl>
+ <dt>-1<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies
+ outside the perimeter of <code>*this</code>.
+ 
+           <br><dt>0<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies on the perimeter
+ of <code>*this</code>.
+ 
+           <br><dt>1<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies inside
+ the perimeter of <code>*this</code>.
+ 
+           <br><dt>-2<dd><var>p</var> and <code>*this</code> are not coplanar.
+ 
+           <br><dt>-3<dd>Something has gone terribly wrong.
+ 
+           <br><dt>-4<dd>The normal to <code>*this</code> has 0 magnitude, i.e., the
+ |Points| on <code>*this</code> are colinear.
+ 
+           <br><dt>-5<dd>An error occurred in putting <code>*this</code> in one of
+ the major planes. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Point <b>angle_point</b> (<var>real angle</var>)<var><a name="index-angle_005fpoint-701"></a></var><br>
+ <blockquote><p>Returns <code>INVALID_POINT</code>.  Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Regular-Polygons.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Regular-Polygons.html
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+ <html lang="en">
+ <head>
+ <title>Querying Regular Polygons - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="prev" href="Regular-Polygon-Operators.html#Regular-Polygon-Operators" title="Regular Polygon Operators">
+ <link rel="next" href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons" title="Circles for Regular Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Regular-Polygons"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">Regular Polygon Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">28.4 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: real <b>get_radius</b> (<var>void</var>)<var><a name="index-get_005fradius-664"></a></var><br>
+ <blockquote><p>Returns <code>radius</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Shapes.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Querying Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Clearing-Shapes.html#Clearing-Shapes" title="Clearing Shapes">
+ <link rel="next" href="Showing-Shapes.html#Showing-Shapes" title="Showing Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Shapes.html#Showing-Shapes">Showing Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Clearing-Shapes.html#Clearing-Shapes">Clearing Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.8 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-251"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the object was allocated on the free store,
+ otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Solids.html
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+ <html lang="en">
+ <head>
+ <title>Querying Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Setting-Solid-Members.html#Setting-Solid-Members" title="Setting Solid Members">
+ <link rel="next" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids" title="Returning Elements and Information Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Setting-Solid-Members.html#Setting-Solid-Members">Setting Solid Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool <b>is_on_free_store</b> (<code>void</code>)<var><a name="index-is_005fon_005ffree_005fstore-798"></a></var><br>
+ <blockquote><p>Returns the value of <code>on_free_store</code>; <code>true</code>, if the
+ <code>Solid</code> was dynamically allocated on the free store, otherwise
+ <code>false</code>. 
+ <code>Solids</code>, and objects of classes derived from <code>Solid</code>,
+ should only ever be allocated on the free store by
+ a specialization of the template function <code>create_new()</code>. 
+ See <a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Querying-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Querying-Transforms.html
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+ <html lang="en">
+ <head>
+ <title>Querying Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Setting-Values-Transforms.html#Setting-Values-Transforms" title="Setting Values Transforms">
+ <link rel="next" href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms" title="Returning Information for Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Querying-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Returning Information for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Setting-Values-Transforms.html#Setting-Values-Transforms">Setting Values Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_identity</b> (<var>void</var>)<var><a name="index-is_005fidentity-278"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if <code>*this</code> is the identity <code>Transform</code>,
+ otherwise <code>false</code>.  This function has both a <code>const</code> and a
+ non-<code>const</code> version.  In the non-<code>const</code> version,
+ <code>clean()</code> is called on <code>*this</code> before comparing the elements of
+ <code>matrix</code> with 1 (for the main diagonal) and 0 (for the other
+ elements).  In the <code>const</code> version, <code>*this</code> is copied,
+ <code>clean()</code> is called on the copy, and the elements of the copy's
+ <code>matrix</code> are compared with 0 and 1. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_element</b> (<var>const unsigned short row, const unsigned short col</var>)<var><a name="index-get_005felement-279"></a></var><br>
+ <blockquote><p>Returns the value stored in the element of <code>matrix</code> indicated by the arguments.
+ 
+      <pre class="example">          Transform t;
+           t.shift(1, 2, 3);
+           t.scale(2.5, -1.2, 4);
+           t.rotate(30, 15, 60);
+           t.show("t:");
+           -| t:
+               1.21    2.09   0.647       0
+              0.822  -0.654    0.58       0
+              -2.18   0.224    3.35       0
+              -3.69    1.45    11.8       1
+           cout &lt;&lt; t.get_element(2, 1);
+           -| 0.224
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangle-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Rectangle Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Rectangle-Data-Members.html#Rectangle-Data-Members" title="Rectangle Data Members">
+ <link rel="next" href="Rectangle-Operators.html#Rectangle-Operators" title="Rectangle Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangle-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rectangle-Operators.html#Rectangle-Operators">Rectangle Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Rectangle</b> (<var>void</var>)<var><a name="index-Rectangle-675"></a></var><br>
+ <blockquote><p>Creates an empty <code>Rectangle</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Rectangle</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-Rectangle-676"></a></var><br>
+ <blockquote><p>Creates a <code>Rectangle</code> in the x-z plane, centered at the origin,
+ with width == <var>aaxis_h</var>
+ (in the + or - x
+  direction),
+ and height == <var>aaxis_v</var>
+ (in the
+ + or - z
+  direction). 
+ If one or more of the arguments
+ <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> are used, it is rotated
+ by those amounts around the appropriate axes. 
+ Finally, the <code>Rectangle</code> is shifted such that
+ its center lies at <var>ccenter</var>.
+ 
+      <pre class="example">          Point C(-1, -1, 1);
+           Rectangle r(C, 3, 4, 30, 30, 30);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF151.png"
+ alt="[Figure 151. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 151. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-677"></a></var><br>
+ <blockquote><p>Corresponds to the constructor described above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Rectangle</b> (<var>const Point&amp; p0, const Point&amp; p1, const Point&amp; p2, const Point&amp; p3</var>)<var><a name="index-Rectangle-678"></a></var><br>
+ <blockquote><p>Creates <code>Rectangle</code> using four <code>Point</code>
+ arguments.  The order of the arguments must correspond with a path
+ around the <code>Rectangle</code>.
+ 
+         <p>This function does not currently check that the arguments yield a valid
+ <code>Rectangle</code>, therefore all code using it must ensure that they do. 
+ <!-- !! TO DO:  Change this function, so that it checks! -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; pt0, const Point&amp; pt1, const Point&amp; pt2, const Point&amp; pt3</var>)<var><a name="index-set-679"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Rectangle* <b>create_new&lt;Rectangle&gt;</b> (<var>const Rectangle* r</var>)<var><a name="index-create_005fnew_003cRectangle_003e-680"></a></var><br>
+ &mdash; : Rectangle* <b>create_new&lt;Rectangle&gt;</b> (<var>const Rectangle&amp; r</var>)<var><a name="index-create_005fnew_003cRectangle_003e-681"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Rectangles</code>. 
+ They create a <code>Rectangle</code> on the free store and allocate memory for it using
+ <code>new(Rectangle)</code>.  They return a pointer to the new <code>Rectangle</code>.
+ 
+         <p>If <var>r</var> is a non-zero pointer or a reference,
+ the new <code>Rectangle</code> will be a copy of
+ <var>r</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Rectangle&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangle-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Rectangle Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="next" href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions" title="Rectangle Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangle-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variables: real <b>axis_h</b><var><a name="index-axis_005fh-672"></a></var><br>
+ &mdash; : real <b>axis_v</b><var><a name="index-axis_005fv-673"></a></var><br>
+ <blockquote><p>The lengths of the horizontal and vertical axes, respectively, of the
+ <code>Rectangle</code>.  Actually,
+ they are merely the horizontal and vertical axes by convention, since
+ there are no restrictions on the orientation of an <code>Rectangle</code>.
+ 
+         <p>Please note that <code>axis_h</code> and <code>axis_v</code> are currently not
+ recalculated, when a <code>Rectangle</code> is transformed.  I plan to do
+ something about this soon. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-674"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Rectangle</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>.  Dynamic allocation of
+ <code>Rectangles</code> should only be
+ performed by <code>create_new&lt;Rectangle&gt;()</code>, which sets
+ <code>on_free_store</code> to <code>true</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangle-Operators.html
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*** 0 ****
--- 1,62 ----
+ <html lang="en">
+ <head>
+ <title>Rectangle Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions" title="Rectangle Constructors and Setting Functions">
+ <link rel="next" href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles" title="Returning Points for Rectangles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangle-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment Operator: const Rectangle&amp; <b>operator=</b> (<var>const Rectangle&amp; r</var>)<var><a name="index-operator_003d-682"></a></var><br>
+ <blockquote><p>Makes the <code>Rectangle</code> a copy of <var>r</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangle-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangle-Reference.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,78 ----
+ <html lang="en">
+ <head>
+ <title>Rectangle Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="next" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangle-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">29 Rectangle Reference</h2>
+ 
+ <p><a name="index-Rectangle-671"></a>Class <code>Rectangle</code> is defined in <samp><span class="file">rectangs.web</span></samp>, and
+ is derived from <code>Polygon</code>, using public derivation.
+ 
+    <p>As noted above in <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Polygon Reference; Affine Transformations</a>, <code>class Rectangle</code>,
+ like <code>class Reg_Polygon</code>,
+ currently inherits its transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Polygon</code>.  Consequently,
+ the data members of a <code>Rectangle</code>, except for <code>center</code>, are
+ not recalculated when it's transformed.  I plan to change this soon!  It
+ will also be necessary to add the function
+ <code>Rectangle::is_rectangular()</code>, in order to test whether a
+ <code>Rectangle</code> is still rectangular.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a>
+ <li><a accesskey="2" href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Rectangle-Operators.html#Rectangle-Operators">Rectangle Operators</a>
+ <li><a accesskey="4" href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>
+ <li><a accesskey="5" href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a>
+ <li><a accesskey="6" href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangles-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangles-Getstart.html
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+ <html lang="en">
+ <head>
+ <title>Rectangles Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="prev" href="Regular-Polygons-Getstart.html#Regular-Polygons-Getstart" title="Regular Polygons Getstart">
+ <link rel="next" href="Ellipses-Getstart.html#Ellipses-Getstart" title="Ellipses Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangles-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipses-Getstart.html#Ellipses-Getstart">Ellipses Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygons-Getstart.html#Regular-Polygons-Getstart">Regular Polygons Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">7.2 Rectangles</h3>
+ 
+ <p>A <code>Rectangle</code> can be constructed in the x-z plane by specifying a
+ center <code>Point</code>, the width, and the height:
+ 
+ <pre class="example">     Rectangle r(origin, 2, 3);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF27.png"
+ alt="[Figure 27. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 27. 
+ <br>
+ </p>
+ 
+    <p>Three additional arguments can be used to specify rotation about the x,
+ y, and z-axes respectively:
+ 
+ <pre class="example">     Rectangle r(origin, 2, 3, 30, 45, 15);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF28.png"
+ alt="[Figure 28. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 28. 
+ <br>
+ </p>
+ 
+    <p>If a <code>Point</code> <var>p</var> other than the origin is specified as the center of
+ the <code>Rectangle</code>, the latter is first created in the x-z plane,
+ centered about the origin, as above.  Then, any rotations specified are
+ performed.  Finally, the <code>Rectangle</code> is shifted such that its center
+ comes to lie at <var>p</var>:
+ 
+ <pre class="example">     Point p0(.5, 1, 3);
+      Rectangle r(p0, 4, 2, 30, 30, 30);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF29.png"
+ alt="[Figure 29. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 29. 
+ <br>
+ </p>
+ 
+    <p>This constructor has a corresponding setting function:
+ 
+ <pre class="example">     Rectangle r;
+      for (int i = 0; i &lt; 180; i += 30)
+        {
+          r.set(origin, 4, 2, i);
+          r.draw();
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF30.png"
+ alt="[Figure 30. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 30. 
+ <br>
+ </p>
+ 
+    <p><code>Rectangles</code> can also be specified using four <code>Points</code> as
+ arguments, whereby they must be ordered so that they are contiguous in
+ the resulting <code>Rectangle</code>:
+ 
+ <pre class="example">     Point pt[4];
+      pt[0].shift(-1, -2);
+      pt[2] = pt[1] = pt[0];
+      pt[1].rotate(180);
+      pt[3] = pt[1];
+      pt[2] *= pt[3].rotate(0, 180);
+      Rectangle r(pt[0], pt[2], pt[3], pt[1]);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF31.png"
+ alt="[Figure 31. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 31. 
+ <br>
+ </p>
+ 
+    <p>This constructor checks whether the <code>Point</code> arguments are coplanar,
+ however, it does not check whether they are really the corners of a
+ valid rectangle;  the user, or the code that calls this function, must
+ ensure that they are.  In the following
+ example, <code>r</code>, although not rectangular, is a <code>Rectangle</code>, as
+ far as 3DLDF is concerned:
+ 
+ <pre class="example">     pt[0].shift(0, -1);
+      pt[3].shift(0, 1);
+      Rectangle q(pt[0], pt[2], pt[3], pt[1]);
+      q.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF32.png"
+ alt="[Figure 32. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 32. 
+ <br>
+ </p>
+ 
+    <p>This constructor is not really intended to be used directly, but should
+ mostly be called from within other functions, that should ensure that
+ the arguments produce a rectangular <code>Rectangle</code>.  There is also no
+ guarantee that transformations or other functions called on
+ <code>Rectangle</code>, <code>Circle</code>, or other classes representing
+ geometric figures won't cause them to become non-rectangular,
+ non-circular, or otherwise irregular.  Sometimes, this might even be
+ desirable.  I plan to add the function
+ <code>Rectangle::is_rectangular()</code> soon, so that users can test
+ <code>Rectangles</code> for rectangularity.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangles-for-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rectangles-for-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rectangles-for-Ellipses.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,152 ----
+ <html lang="en">
+ <head>
+ <title>Rectangles for Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Solving-Ellipses.html#Solving-Ellipses" title="Solving Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rectangles-for-Ellipses"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.11 Rectangles</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>out_rectangle</b> (<code>void</code>)<var><a name="index-out_005frectangle-755"></a></var><br>
+ <blockquote><p>Returns the <code>Rectangle</code> that surrounds the <code>Ellipse</code>.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 4, 45, 30, 17);
+           e.shift(1, -1, 2);
+           Rectangle r = e.out_rectangle();
+           r.filldraw(black, gray);
+           e.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF172.png"
+ alt="[Figure 172. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 172. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>in_rectangle</b> (<code>void</code>)<var><a name="index-in_005frectangle-756"></a></var><br>
+ <blockquote><p>Returns the <code>Rectangle</code> enclosed within the <code>Ellipse</code>.
+ 
+      <pre class="example">          Rectangle r = e.in_rectangle();
+           e.filldraw(black, gray);
+           r.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF173.png"
+ alt="[Figure 173. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 173. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>draw_out_rectangle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fout_005frectangle-757"></a></var><br>
+ <blockquote><p>Draws the <code>Rectangle</code> that surrounds the <code>Ellipse</code>.  The arguments
+ are like those of <code>Path::draw()</code>. 
+ The return value is the surrounding <code>Rectangle</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+      <pre class="example">          Ellipse e(origin, 2.5, 5, 10, 12, 15.5);
+           e.shift(-1, 1, 1);
+           e.draw_out_rectangle(black, "evenly", "pencircle scaled .3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF174.png"
+ alt="[Figure 174. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 174. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>draw_in_rectangle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fin_005frectangle-758"></a></var><br>
+ <blockquote><p>Draws the <code>Rectangle</code> enclosed within the <code>Ellipse</code>.  The arguments
+ are like those of <code>Path::draw()</code>. 
+ The return value is the enclosed <code>Rectangle</code>. 
+ See <a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+      <pre class="example">          Ellipse e(origin, 3.5, 6, 10, 12, 15.5);
+           e.shift(-1, 1, 1);
+           e.draw_in_rectangle(black, "evenly", "pencircle scaled .3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF175.png"
+ alt="[Figure 175. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 175. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- circle.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Register-Width.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Register-Width.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Register-Width.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Register-Width.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Register Width - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="System-Information.html#System-Information" title="System Information">
+ <link rel="prev" href="Endianness.html#Endianness" title="Endianness">
+ <link rel="next" href="Get-Second-Largest-Real.html#Get-Second-Largest-Real" title="Get Second Largest Real">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Register-Width"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">Get Second Largest Real</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Endianness.html#Endianness">Endianness</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="System-Information.html#System-Information">System Information</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">15.2 Register Width</h3>
+ 
+ <div class="defun">
+ &mdash; Function: unsigned short <b>get_register_width</b> (<var>void</var>)<var><a name="index-get_005fregister_005fwidth-156"></a></var><br>
+ <blockquote><p>Returns the register width of the CPU of the system on which 3DLDF is
+ being run.  This will normally be either 32 or 64 bits.
+ 
+         <p>This is the C++
+  code:
+ 
+      <pre class="example">          return (sizeof(void*) * CHAR_BIT);
+ </pre>
+         <p>This assumes that an address will be the same size as the processor's
+ registers, and that <code>CHAR_BIT</code> will be the number of bits in a
+ byte.  These are reasonable assumptions that apply to all architectures
+ I know about.
+ 
+         <p>This function is called by <code>is_32_bit()</code> and <code>is_64_bit()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_32_bit</b> (<var>void</var>)<var><a name="index-is_005f32_005fbit-157"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the CPU of the system on which 3DLDF is being run
+ has a register width of 32 bits, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_64_bit</b> (<var>void</var>)<var><a name="index-is_005f64_005fbit-158"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the CPU of the system on which 3DLDF is being run
+ has a register width of 64 bits, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Data-Members.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Regular Closed Plane Curve Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="prev" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="next" href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves" title="Querying Regular Closed Plane Curves">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">30.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: Point <b>center</b><var><a name="index-center-693"></a></var><br>
+ <blockquote><p>The center of the <code>Reg_Cl_Plane_Curve</code>, if it has one. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>number_of_points</b><var><a name="index-number_005fof_005fpoints-694"></a></var><br>
+ <blockquote><p>The number of <code>Points</code> on <code>points</code> in a
+ <code>Reg_Cl_Plane_Curve</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Intersections.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Intersections.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Intersections.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,146 ----
+ <html lang="en">
+ <head>
+ <title>Regular Closed Plane Curve Intersections - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="prev" href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves" title="Querying Regular Closed Plane Curves">
+ <link rel="next" href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments" title="Regular Closed Plane Curve Segments">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Intersections"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">30.3 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>Point ref_pt, Point p0, Point p1</var>)<var><a name="index-intersection_005fpoints-702"></a></var><br>
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; ref_pt, const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-703"></a></var><br>
+ <blockquote><p>The version of this function taking <code>Point</code> arguments finds the
+ intersection points, if any, of the
+ <code>Reg_Cl_Plane_Curve</code> and the line
+ p
+ that passes through the <code>Points</code>
+ p_0
+ and
+ p_1. 
+ In the other version, the <code>Path</code> argument must be a linear
+ <code>Path</code>, and its first and last <code>Points</code> are passed to the
+ first version of this function as <var>p0</var> and <var>p1</var>, respectively.
+ 
+         <p>Let
+ C
+ be the <code>Reg_Cl_Plane_Curve</code>. 
+ C and p can intersect at at most two intersection points
+ i_1 and i_2. 
+ Let <code>bpp</code> be the return
+ value of this function. 
+ The intersection points need not be on the <em>line segment</em>
+ between <code>pt0</code> and <code>pt1</code>. 
+ <code>bpp.first.pt</code> will be set
+ to the first intersection point if it exists, or <code>INVALID_POINT</code> if
+ it doesn't.  If the first intersection point exists and is on the line
+ segment between <code>pt0</code> and <code>pt1</code>
+ 
+         <p>In [next figure]
+ , the line AB
+  is normal to the
+ <code>Ellipse</code> e, or, to put it another way, AB
+  is
+ perpendicular to the plane of e.  The intersection point i_0 lies
+ within the perimeter of e.
+ 
+         <p>The line DE
+  is skew to the plane of e, and
+ intersects e at i_1, on the perimeter of e.
+ 
+      <pre class="example">          Point p0(2, 2, 3);
+           Ellipse e(p0, 3, 4, 30, -60, -5.2);
+           Point p1 = p0.mediate(e.get_point(11), .5);
+           Point A = e.get_normal();
+           A *= 2.5;
+           A.shift(p1);
+           Point B = A.mediate(p1, 2);
+           bool_point_pair bpp = e.intersection_points(A, B);
+           Point C(0, 2, 0);
+           Point D(0, -3.5, 0);
+           C *= D.rotate(2, 0, -5);
+           C *= D.shift(e.get_point(4));
+           bpp = e.intersection_points(C, D);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF154.png"
+ alt="[Figure 154. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 154. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , q and e are coplanar.  In this case,
+ only the intersections of q with the perimeter of e are returned by
+ <code>intersection_points()</code>.
+ 
+      <pre class="example">          A = p0.mediate(e.get_point(3), 1.5);
+           B = p0.mediate(e.get_point(11), 1.5);
+           Path q(A, B);
+           bpp = e.intersection_points(q);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF155.png"
+ alt="[Figure 155. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 155. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Reference.html
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*** 0 ****
--- 1,115 ----
+ <html lang="en">
+ <head>
+ <title>Regular Closed Plane Curve Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="next" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">30 Regular Closed Plane Curve Reference</h2>
+ 
+ <p><a name="index-Reg_005fCl_005fPlane_005fCurve-692"></a>Class <code>Reg_Cl_Plane_Curve</code> is defined in <samp><span class="file">curves.web</span></samp>. 
+ It is derived from <code>Path</code> using <code>public</code> derivation.
+ 
+    <p><code>Reg_Cl_Plane_Curve</code> is not called
+ &ldquo;<code>Regular_Closed_Plane_Curve</code>&rdquo; because the longer name
+ causes too many &ldquo;Overfull boxes&rdquo;<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ in the CWEAVE output of the program code. 
+ See <a href="CWEB-Documentation.html#CWEB-Documentation">CWEB Documentation</a>.
+ 
+    <p><code>Reg_Cl_Plane_Curve</code> is meant to be used as a base class;  no
+ objects should be declared of type <code>Reg_Cl_Plane_Curve</code>. 
+ Currently, <code>class Ellipses</code> is derived from
+ <code>Reg_Cl_Plane_Curve</code> and <code>class Circle</code> is derived from
+ <code>Ellipse</code>.
+ 
+    <p>At present, I have no fixed definition of what constitutes
+ &ldquo;regularity&rdquo; as far as <code>Reg_Cl_Plane_Curves</code> are concerned. 
+ Ellipses and circles are &ldquo;regular&rdquo; in the sense that they have axes of
+ symmetry.  There must be an equation for a <code>Reg_Cl_Plane_Curve</code>,
+ such as
+ x^2 + y^2 = r^2
+ for a circle. 
+ A derived class should have a <code>solve()</code> function that uses this
+ equation.  <code>Reg_Cl_Plane_Curve::intersection_points()</code> in turn uses
+ <code>solve()</code> to find the intersection points of a line with the
+ <code>Reg_Cl_Plane_Curve</code>.  This way, the derived classes don't need
+ their own functions for finding their intersections with a line. 
+ However, such functions can be added, if desired.
+ 
+    <p>It is assumed that classes derived from <code>Reg_Cl_Plane_Curve</code> are
+ fillable, which implies that they must be closed <code>Paths</code>. 
+ <code>Reg_Cl_Plane_Curves</code> inherit their drawing and filling functions
+ from <code>Path</code>.
+ 
+    <p>The constructors and setting functions of classes derived from
+ <code>Reg_Cl_Plane_Curve</code> must ensure that the resulting geometric
+ figures are planar, convex, and that the number of <code>Points</code> they contain is
+ a multiple of 4.  The latter assumption is of importance in
+ <code>intersection_points()</code>, <code>segment()</code>, <code>half()</code>, and
+ <code>quarter()</code>. 
+ See <a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>, and
+ <a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Reference; Segments</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>
+ <li><a accesskey="2" href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>
+ <li><a accesskey="3" href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>
+ <li><a accesskey="4" href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> If you don't
+ know what &ldquo;overfull boxes&rdquo; are, don't worry about it.  It has to do with
+ TeX's line and page breaking algorithms.  If you want to know more,
+ see Knuth, Donald E., <cite>The TeXbook</cite>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Segments.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Closed-Plane-Curve-Segments.html
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*** 0 ****
--- 1,152 ----
+ <html lang="en">
+ <head>
+ <title>Regular Closed Plane Curve Segments - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference" title="Regular Closed Plane Curve Reference">
+ <link rel="prev" href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections" title="Regular Closed Plane Curve Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Segments"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">30.4 Segments</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>segment</b> (<var>unsigned int factor, </var>[<var>real angle = 0, </var>[<var>bool closed = </var><code>true</code>]])<var><a name="index-segment-704"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> representing a segment of the <code>Reg_Cl_Plane_Curve</code>. 
+ <var>factor</var> must be
+ &gt;1 and &lt;= <code>number_of_points</code>.  If it is not, an error message is
+ issued and an empty <code>Path</code> is returned.
+ 
+         <p>If <var>angle</var> is non-zero, the segment <code>Path</code> is rotated by
+ <var>angle</var> about a line from <code>center</code> in the direction of the
+ normal to the plane of the <code>Reg_Cl_Plane_Curve</code>. 
+ Please note, that a <code>Reg_Cl_Plane_Curve</code> must have a meaningful
+ <code>center</code>, in order for rotation to work. 
+ If the absolute value of
+ <var>angle</var> &gt;360, a warning is issued, and
+ <code>fmod(</code><var>angle</var><code>, 360)</code> is used.
+ 
+         <p>If <var>closed</var> is <code>true</code>, the <code>Path</code> will be a cycle, with
+ the ends of the curved segment joined using the connector &lsquo;<samp><span class="samp">--</span></samp>&rsquo;. 
+ The curved segment is joined to the line using &lsquo;<samp><span class="samp">&amp;</span></samp>&rsquo; on each side.
+ 
+      <pre class="example">          Circle c(origin, 4, 30, 30, 30);
+           Path p = c.segment(3, 130);
+           p.show("p:");
+           -| p:
+           points.size() == 8
+           connectors.size() == 8(-0.00662541, -0.888379, -1.79185) ..
+           (0.741088, -0.673392, -1.73128) ..
+           (1.37598, -0.355887, -1.40714) ..
+           (1.80139, 0.0157987, -0.868767) ..
+           (1.95255, 0.385079, -0.198137) .. (1.80646, 0.695735, 0.502658) &amp;
+           (1.80646, 0.695735, 0.502658) --
+           (-0.00662541, -0.888379, -1.79185) &amp; cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF156.png"
+ alt="[Figure 156. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 156. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Path <b>half</b> ([<var>real angle = 0, </var>[<var>bool closed = true</var>]])<var><a name="index-half-705"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> using half of the <code>Points</code> on the
+ <code>Reg_Cl_Plane_Curve</code>. 
+ The effect of the arguments <var>angle</var> and <var>closed</var> is similar to
+ that in <code>segment()</code>, above.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 20, 15, 12.5);
+           Path p = e.half(0, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF157.png"
+ alt="[Figure 157. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 157. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Path <b>quarter</b> ([<var>real angle = 0, </var>[<var>bool closed = </var><code>true</code>]])<var><a name="index-quarter-706"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> using a quarter of the <code>Points</code> on the
+ <code>Reg_Cl_Plane_Curve</code>. 
+ The effect of the arguments <var>angle</var> and <var>closed</var> is similar to
+ that in <code>segment()</code>, above.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 60, 5, 2.5);
+           Path p = e.quarter(180, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF158.png"
+ alt="[Figure 158. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 158. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- ellipse.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Platonic-Polyhedra.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Platonic-Polyhedra.html
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*** 0 ****
--- 1,70 ----
+ <html lang="en">
+ <head>
+ <title>Regular Platonic Polyhedra - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link rel="prev" href="Polyhedron-Data-Members.html#Polyhedron-Data-Members" title="Polyhedron Data Members">
+ <link rel="next" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra" title="Semi-Regular Archimedean Polyhedra">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Platonic-Polyhedra"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">37.2 Regular Platonic Polyhedra</h3>
+ 
+ <p>3DLDF currently has classes for three of the five regular Platonic
+ polyhedra: <code>Tetrahedron</code>, <code>Dodecahedron</code>, and
+ <code>Icosahedron</code>.  There is no need for a special <code>Cube</code> class,
+ because cubes can be created using <code>Cuboid</code> with equal width,
+ height, and depth arguments (see <a href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>).  <code>Octahedron</code> is
+ missing at the moment, but I plan to add it soon.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>
+ <li><a accesskey="2" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>
+ <li><a accesskey="3" href="Icosahedron.html#Icosahedron">Icosahedron</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Constructors-and-Setting-Functions.html
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*** 0 ****
--- 1,136 ----
+ <html lang="en">
+ <head>
+ <title>Regular Polygon Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="prev" href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members" title="Regular Polygon Data Members">
+ <link rel="next" href="Regular-Polygon-Operators.html#Regular-Polygon-Operators" title="Regular Polygon Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Polygon-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">Regular Polygon Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">28.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Reg_Polygon</b> (<var>void</var>)<var><a name="index-Reg_005fPolygon-658"></a></var><br>
+ <blockquote><p>Creates an empty <code>Reg_Polygon</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Reg_Polygon</b> (<var>const Point&amp; ccenter, const unsigned short ssides, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-Reg_005fPolygon-659"></a></var><br>
+ <blockquote><p>Creates a <code>Reg_Polygon</code> in the x-z plane, centered at the origin,
+ with the number of sides specified by <var>ssides</var> and with
+ <code>radius</code> = <var>ddiameter</var> / 2.
+ 
+         <p>The <code>Reg_Polygon</code> is rotated
+ about the x, y, and z-axes in that order by the angles given by
+ <var>angle_x</var>, <var>angle_y</var>, and <var>angle_z</var>, respectively, if any
+ one of them is non-zero.  Finally, the
+ <code>Reg_Polygon</code> is shifted such that its center is located at
+ <var>ccenter</var>.
+ 
+      <pre class="example">          Reg_Polygon r(origin, 3, 2.75, 10, 15, 12.5);
+           r.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF145.png"
+ alt="[Figure 145. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 145. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const unsigned short ssides, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-660"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+         <p>A <code>Reg_Polygon</code> can theoretically have any number of sides, however
+ I haven't tested it for unreasonably large values.  The following
+ example demonstrates that <code>set()</code> can be used to change a
+ <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Reg_Polygon r;
+           real j = .5;
+           for (int i = 3; i &lt;= 16; ++i)
+             {
+               r.set(origin, i, j);
+               r.draw();
+               j += .5;
+             }
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF146.png"
+ alt="[Figure 146. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 146. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Reg_Polygon* <b>create_new&lt;Reg_Polygon&gt;</b> (<var>const Reg_Polygon* r</var>)<var><a name="index-create_005fnew_003cReg_005fPolygon_003e-661"></a></var><br>
+ &mdash; : Reg_Polygon* <b>create_new&lt;Reg_Polygon&gt;</b> (<var>const Reg_Polygon&amp; r</var>)<var><a name="index-create_005fnew_003cReg_005fPolygon_003e-662"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Reg_Polygons</code>. 
+ They create a <code>Reg_Polygon</code> on the free store and allocate memory for it using
+ <code>new(Reg_Polygon)</code>.  They return a pointer to the new <code>Reg_Polygon</code>. 
+ If <var>r</var> is a non-zero pointer or a reference,
+ the new <code>Reg_Polygon</code> will be a copy of
+ <var>r</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Reg_Polygon&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Regular Polygon Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="prev" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="next" href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions" title="Regular Polygon Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Polygon-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">28.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>internal_angle</b><var><a name="index-internal_005fangle-654"></a></var><br>
+ <blockquote><p>The angle at the center of the <code>Reg_Polygon</code> of the triangle formed
+ by the center and two adjacent corners. 
+ If n is the number of sides of a <code>Reg_Polygon</code>,
+ <code>internal_angle</code> will be 360.0/n, so <code>internal_angle</code>
+ will be 120 for a regular triangle, 90 for a square, 72 for a pentagon,
+ etc. 
+ <!-- !! Make figure. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>radius</b><var><a name="index-radius-655"></a></var><br>
+ <blockquote><p>The radius of the surrounding circle for a <code>Reg_Polygon</code> (<i>Umkreis</i>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: unsigned <b>short</b><var> sides<a name="index-short-656"></a></var><br>
+ <blockquote><p>The number of sides of a <code>Reg_Polygon</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-657"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Reg_Polygon</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>.  Dynamic allocation of
+ <code>Reg_Polygons</code> should only be
+ performed by <code>create_new&lt;Reg_Polygon&gt;()</code>, which sets
+ <code>on_free_store</code> to <code>true</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Operators.html
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--- 1,62 ----
+ <html lang="en">
+ <head>
+ <title>Regular Polygon Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference" title="Regular Polygon Reference">
+ <link rel="prev" href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions" title="Regular Polygon Constructors and Setting Functions">
+ <link rel="next" href="Querying-Regular-Polygons.html#Querying-Regular-Polygons" title="Querying Regular Polygons">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Polygon-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">Querying Regular Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">28.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Operator: const Reg_Polygon&amp; <b>operator=</b> (<var>const Reg_Polygon&amp; p</var>)<var><a name="index-operator_003d-663"></a></var><br>
+ <blockquote><p>Makes the <code>Reg_Polygon</code> a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Polygon-Reference.html
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*** 0 ****
--- 1,77 ----
+ <html lang="en">
+ <head>
+ <title>Regular Polygon Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Polygon-Reference.html#Polygon-Reference" title="Polygon Reference">
+ <link rel="next" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Polygon-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">28 Regular Polygon Reference</h2>
+ 
+ <p><a name="index-Reg_005fPolygon-653"></a>Class <code>Reg_Polygon</code> is defined in <samp><span class="file">polygons.web</span></samp>, and
+ is derived from <code>Polygon</code>, using public derivation.
+ 
+    <p>As noted above in <a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Polygon Reference; Affine Transformations</a>, <code>class Reg_Polygon</code>,
+ like <code>class Rectangle</code>,
+ currently inherits its transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Polygon</code>.  Consequently,
+ the data members of a <code>Reg_Polygon</code>, except for <code>center</code>, are
+ not recalculated when it's transformed.  I plan to change this soon!  It
+ will also be necessary to add the function
+ <code>Reg_Polygon::is_reg_polygonal()</code>, in order to test whether a
+ <code>Reg_Polygon</code> is still regular and polygonal.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>
+ <li><a accesskey="2" href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">Regular Polygon Operators</a>
+ <li><a accesskey="4" href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">Querying Regular Polygons</a>
+ <li><a accesskey="5" href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Regular-Polygons-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Regular-Polygons-Getstart.html
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+ <html lang="en">
+ <head>
+ <title>Regular Polygons Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="prev" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="next" href="Rectangles-Getstart.html#Rectangles-Getstart" title="Rectangles Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Regular-Polygons-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rectangles-Getstart.html#Rectangles-Getstart">Rectangles Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">7.1 Regular Polygons</h3>
+ 
+ <p>The following example creates a pentagon in the x-z plane, centered
+ about the origin, whose enclosing circle has a radius equal to 3cm.
+ 
+ <pre class="example">     default_focus.set(2, 3, -10, 2, 3, 10, 10);
+      Reg_Polygon p(origin, 5, 3);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF20.png"
+ alt="[Figure 20. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 20. 
+ <br>
+ </p>
+ 
+    <p>Three additional arguments cause the pentagon to be rotated about the x,
+ y, and z axes by the amount indicated.  In this example, it's rotated
+ 90 degrees
+ 
+    <p>about the x-axis, so that it comes to lie in the x-y plane:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 90);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF21.png"
+ alt="[Figure 21. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 21. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 36 degrees
+ 
+    <p>about the y-axis, so that it appears to point in the opposite
+ direction from the first example:
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 0, 36);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF22.png"
+ alt="[Figure 22. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 22. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 90 degrees
+ 
+    <p>about the z-axis, so that it lies in the z-y plane:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 0, 0, 90);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF23.png"
+ alt="[Figure 23. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 23. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 45 degrees
+ 
+    <p>about the x, y, and z-axes in that order:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 45, 45, 45);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF24.png"
+ alt="[Figure 24. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 24. 
+ <br>
+ </p>
+ 
+    <p><code>Reg_Polygons</code> need not be centered about the <code>origin</code>.  If
+ another <code>Point</code> <var>pt</var> is used as the first argument, the <code>Reg_Polygon</code>
+ is first created with its center at the origin, then the specified
+ rotations, if any, are performed.  Finally, the <code>Reg_Polygon</code> is
+ shifted such that its center comes to lie on <var>pt</var>:
+ 
+ <pre class="example">     Point P(-2, 1, 1);
+      Reg_Polygon hex(P, 6, 4, 60, 30, 30);
+      hex.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF25.png"
+ alt="[Figure 25. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 25. 
+ <br>
+ </p>
+ 
+    <p>In the following example, the <code>Reg_Polygon</code> <code>polygon</code> is first
+ declared using the default constructor, which creates an empty
+ <code>Reg_Polygon</code>.  Then, the <code>polygon</code> is repeatedly changed using
+ the setting function corresponding to the constructor used in the
+ previous examples.  [next figure]
+  demonstrates that a given
+ <code>Reg_Polygon</code> need not always have the same number of sides.
+ 
+ <pre class="example">     Point p(0, -3);
+      Reg_Polygon polygon;
+      for (int i = 3; i &lt; 9; ++i)
+        {
+          polygon.set(p, i, 3);
+          polygon.draw();
+          p.shift(0, 1);
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF26.png"
+ alt="[Figure 26. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 26. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Resetting-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Resetting-Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Resetting-Transforms.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Resetting Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms" title="Alignment with an Axis for Transforms">
+ <link rel="next" href="Cleaning-Transforms.html#Cleaning-Transforms" title="Cleaning Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Resetting-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Cleaning-Transforms.html#Cleaning-Transforms">Cleaning Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.12 Resetting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset</b> (<var>void</var>)<var><a name="index-reset-291"></a></var><br>
+ <blockquote><p>Resets <var>matrix</var> to the identity matrix. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Coordinates.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Coordinates.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Coordinates.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Returning Coordinates - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Querying-Points.html#Querying-Points" title="Querying Points">
+ <link rel="next" href="Returning-Information-for-Points.html#Returning-Information-for-Points" title="Returning Information for Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Coordinates"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Returning-Information-for-Points.html#Returning-Information-for-Points">Returning Information for Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Points.html#Querying-Points">Querying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.9 Returning Coordinates</h3>
+ 
+ <p>The functions in this section return either a single coordinate or a set of
+ coordinates.  Each has
+ a <code>const</code> and a non-<code>const</code> version.
+ 
+    <p>The arguments are the same, with one exception:
+ 
+      <dl>
+ <dt><code>char</code><var> c</var><dd>Only in <code>get_coord()</code>.  Indicates which coordinate should be
+ returned.  Valid values are <code>'x'</code>, <code>'X'</code>, <code>'y'</code>,
+ <code>'Y'</code>, <code>'z'</code>, <code>'Z'</code>, <code>'w'</code>, and <code>'W'</code>.
+ 
+      <br><dt><code>char </code><var>coords</var><dd>Indicates the set of coordinates which should be returned or from which
+ the coordinate to be returned should be chosen from.  Valid values are
+ <code>'w'</code> for <code>world_coordinates</code> (the default), <code>'p'</code> for
+ <code>projective_coordinates</code>, <code>'u'</code> for <code>user_coordinates</code>,
+ and <code>'v'</code> for <code>view_coordinates</code>.
+ 
+      <br><dt><code>const bool</code><var> do_persp</var><dd>Only relevant if <code>projective_coordinates</code>, or one of its elements
+ is to be returned.  If <code>true</code>, the
+ default, then <code>project()</code> is called, thereby generating values for
+ <code>projective_coordinates</code>.  If <var>do_persp</var> is <code>false</code>, then
+ <code>projective_coordinates</code>, or one of its elements, is
+ returned unchanged, which may sometimes be useful.
+ 
+      <br><dt><code>const bool</code><var> do_apply</var><dd>If <code>true</code> (the default), <code>apply_transform()</code> is called,
+ thereby updating the <code>world_coordinates</code>.  Otherwise, it's not, so
+ that the values stored in <code>world_coordinates</code> remain unchanged. 
+ Note that if <var>coords</var> is <code>'p'</code> and <var>do_persp</var> is <code>true</code>,
+ <code>apply_transform()</code> will be called in <code>project()</code>
+ whether <code>do_apply</code> is <code>true</code> or <code>false</code>.  If for some
+ reason, one wanted get <code>projective_coordinates</code>, or one of its
+ values, based on the
+ projection of <code>world_coordinates</code> without first updating them, one
+ would have to call <code>reset_transform()</code> before calling one of
+ these functions.  It would probably be a good idea to save <code>transform</code>
+ before doing so.
+ 
+      <br><dt><code>Focus*</code><var> f</var><dd>Indicates what <code>Focus</code> is to be used for projection. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is 0, in which case <var>f</var> points to the global
+ variable <code>default_focus</code>.
+ 
+      <br><dt><code>const unsigned short</code><var> proj</var><dd>Indicates what form of projection is to be used. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is <code>Projections::PERSP</code>, which causes the
+ perspective projection to be applied.
+ 
+      <br><dt><code>real</code><var> factor</var><dd>Passed to <code>project()</code>.  The values of the x and y coordinates in
+ <code>projective_coordinates</code> are multiplied by <var>factor</var>. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is 1. 
+ </dl>
+ 
+ <div class="defun">
+ &mdash; Function: valarray &lt;real&gt; <b>get_all_coords</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fall_005fcoords-404"></a></var><br>
+ <blockquote><p>Returns one of the sets of coordinates;  <code>world_coordinates</code> by
+ default. 
+ Returns a complete set of coordinates:  <code>'w'</code> for <code>world_coordinates</code>,
+ <code>'p'</code> for <code>projective_coordinates</code>, <code>'u'</code> for
+ <code>user_coordinates</code>, or<code>'v'</code> for  <code>view_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_coord</b> (<var>char c, </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fcoord-405"></a></var><br>
+ <blockquote><p>Returns one <code>coordinate</code>, x, y, z, or w, from the set of
+ coordinates indicated (or <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_x</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fx-406"></a></var><br>
+ <blockquote><p>Returns the x-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_y</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fy-407"></a></var><br>
+ <blockquote><p>Returns the y-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_z</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fz-408"></a></var><br>
+ <blockquote><p>Returns the z-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_w</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fw-409"></a></var><br>
+ <blockquote><p>Returns the w-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Elements-and-Information-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Elements-and-Information-Solids.html
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*** 0 ****
--- 1,69 ----
+ <html lang="en">
+ <head>
+ <title>Returning Elements and Information Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Querying-Solids.html#Querying-Solids" title="Querying Solids">
+ <link rel="next" href="Showing-Solids.html#Showing-Solids" title="Showing Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Elements-and-Information-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Solids.html#Showing-Solids">Showing Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Solids.html#Querying-Solids">Querying Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.8 Returning Elements and Information</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: const Point&amp; <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-799"></a></var><br>
+ <blockquote><p>Returns <code>center</code>.  If the <code>Solid</code> doesn't
+ have a meaningful center, the return value will probably be
+ <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>
+ <li><a accesskey="2" href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Elements-and-Information-for-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Elements-and-Information-for-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Elements-and-Information-for-Ellipses.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,223 ----
+ <html lang="en">
+ <head>
+ <title>Returning Elements and Information for Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Querying-Ellipses.html#Querying-Ellipses" title="Querying Ellipses">
+ <link rel="next" href="Ellipse-Intersections.html#Ellipse-Intersections" title="Ellipse Intersections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Elements-and-Information-for-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.8 Returning Elements and Information</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Point&amp; <b>get_center</b> (<code>void</code>)<var><a name="index-get_005fcenter-738"></a></var><br>
+ &mdash; <code>const</code> virtual function: Point <b>get_center</b> (<code>void</code>)<var><a name="index-get_005fcenter-739"></a></var><br>
+ <blockquote><p>These functions return <code>center</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: const Point&amp; <b>get_focus</b> (<var>const unsigned short s</var>)<var><a name="index-get_005ffocus-740"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>get_focus</b> (<var>const unsigned short s</var>)<var><a name="index-get_005ffocus-741"></a></var><br>
+ <blockquote><p>These functions return <code>focus0</code> or <code>focus1</code>, depending on the
+ value of <var>s</var>, which must be 0 or 1.  If <var>s</var> is not 0 or 1,
+ <code>get_focus()</code> returns <code>INVALID_POINT</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_linear_eccentricity</b> (<var>void</var>)<var><a name="index-get_005flinear_005feccentricity-742"></a></var><br>
+ <blockquote><p>Returns <code>linear_eccentricity</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_numerical_eccentricity</b> (<var>void</var>)<var><a name="index-get_005fnumerical_005feccentricity-743"></a></var><br>
+ <blockquote><p>Returns <code>numerical_eccentricity</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_axis_v</b> (<code>void</code>)<var><a name="index-get_005faxis_005fv-744"></a></var><br>
+ &mdash; <code>const</code> function: real <b>get_axis_v</b> (<code>void</code>)<var><a name="index-get_005faxis_005fv-745"></a></var><br>
+ <blockquote><p>Calculates and returns the value of <code>axis_h</code>.
+ 
+         <p><code>get_axis_v()</code> first checks if the <code>Ellipse</code> is still
+ elliptical, using <code>is_elliptical()</code>
+ (see <a href="Querying-Ellipses.html#Querying-Ellipses">Ellipse Reference; Querying</a>). 
+ Operations such as <code>scale()</code> and <code>shear()</code> can
+ cause an <code>Ellipse</code> to become non-elliptical. 
+ If this is the case, this function returns <code>INVALID_REAL</code>.
+ 
+         <p>If the <code>Ellipse</code> is still elliptical, <code>axis_v</code> is
+ recalculated and returned.  In the non-<code>const</code> version,
+ <code>axis_v</code> is also reset to the new value. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_axis_h</b> (<code>void</code>)<var><a name="index-get_005faxis_005fh-746"></a></var><br>
+ &mdash; <code>const</code> function: real <b>get_axis_h</b> (<code>void</code>)<var><a name="index-get_005faxis_005fh-747"></a></var><br>
+ <blockquote><p>Calculates and returns the value of <code>axis_h</code>.
+ 
+         <p><code>get_axis_h()</code> first checks if the <code>Ellipse</code> is still
+ elliptical, using <code>is_elliptical()</code>
+ (see <a href="Querying-Ellipses.html#Querying-Ellipses">Ellipse Reference; Querying</a>). 
+ Operations such as <code>scale()</code> and <code>shear()</code> can
+ cause an <code>Ellipse</code> to become non-elliptical. 
+ If this is the case, this function returns <code>INVALID_REAL</code>.
+ 
+         <p>If the <code>Ellipse</code> is still elliptical, <code>axis_h</code> is
+ recalculated and returned.  In the non-<code>const</code> version,
+ <code>axis_h</code> is also reset to the new value. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: signed short <b>location</b> (<var>Point p</var>)<var><a name="index-location-748"></a></var><br>
+ <blockquote><p>Returns a value l indicating the location of the <code>Point</code> argument
+ p with respect to the <code>Ellipse</code>.
+ 
+         <p>Let e stand for the <code>Ellipse</code>. 
+ The return values are as follows:
+ 
+           <dl>
+ <dt>0<dd>p lies on the perimeter of e.
+ 
+           <br><dt>1<dd>p lies in the plane of e, within its perimeter.
+ 
+           <br><dt>-1<dd>p lies in the plane of e, outside its perimeter.
+ 
+           <br><dt>-2<dd>p and e do not lie in the same plane.
+ 
+           <br><dt>-3<dd>e is not elliptical, possibly due to having been transformed. 
+ </dl>
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 45, 15, 3);
+           e.shift(2, 1, 1);
+           Point A = e.get_point(7);
+           cout &lt;&lt; e.location(A);
+           -| 0
+           Point B = center.mediate(e.get_point(2));
+           cout &lt;&lt; e.location(B);
+           -| 1
+           Point C = center.mediate(e.get_point(2), 1.5);
+           cout &lt;&lt; e.location(C);
+           -| -1
+           Point D = A;
+           D.shift(-2, 0, 4);
+           e.location(D);
+           -| WARNING! In Ellipse::location():
+              Point doesn't lie in plane of Ellipse.
+              Returning -2.
+           e.scale(1.5, 0, 1.5);
+           e.location(A);
+           -| WARNING! In Ellipse::do_transform(const Transform&amp;):
+              This transformation has made *this non-elliptical!
+           
+              ERROR! In Ellipse::location():
+              Ellipse is non-elliptical. Returning -3.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF164.png"
+ alt="[Figure 164. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 164. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>angle_point</b> (<var>real angle</var>)<var><a name="index-angle_005fpoint-749"></a></var><br>
+ <blockquote><p>Returns a point on the <code>Ellipse</code> given an angle. 
+ A <code>Point</code> <var>p</var> is set to the zeroth <code>Point</code> on the <code>Ellipse</code>
+ and rotated about the line from the center of the <code>Ellipse</code> in the
+ direction of the normal to the plane of the <code>Ellipse</code>. 
+ Then, the intersection of the ray from the center through
+ <var>p</var> and the perimeter of the <code>Ellipse</code> is returned.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           Point P = e.angle_point(135);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF165.png"
+ alt="[Figure 165. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 165. 
+ <br>
+ </p>
+ 
+         <p>[next figure]
+  demonstrates, that the rotation is unfortunately not always
+ in the direction one would prefer.  I don't have a solution to this
+ problem yet.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4, 90);
+           Point P = e.angle_point(135);
+           Point Q = e.angle_point(-135);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF166.png"
+ alt="[Figure 166. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 166. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Information-for-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Information-for-Points.html
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+ <html lang="en">
+ <head>
+ <title>Returning Information for Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Returning-Coordinates.html#Returning-Coordinates" title="Returning Coordinates">
+ <link rel="next" href="Modifying-Points.html#Modifying-Points" title="Modifying Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Information-for-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Modifying-Points.html#Modifying-Points">Modifying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.10 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: real <b>epsilon</b> (<var>void</var>)<var><a name="index-epsilon-410"></a></var><br>
+ <blockquote><p>Returns the positive <code>real</code> value of smallest magnitude
+ \epsilon that should be used as a coordinate value in a
+ <code>Point</code>. 
+ A coordinate of a <code>Point</code> may also contain
+ -\epsilon.
+ 
+         <p>The value \epsilon is used for testing the equality of
+ <code>Points</code> in <code>Point::operator==()</code>
+ (see <a href="Point-Operators.html#Point-Operators">Point Reference; Operators</a>):
+ 
+         <p>Let \epsilon be the value returned by <code>epsilon()</code>,
+ P and Q be
+ <code>Points</code>, and P_x, Q_x, P_y, Q_y,
+ P_z, and Q_z the updated x, y, and z-coordinates of P and Q,
+ respectively. 
+ If and only if
+ ||P_x| - |Q_x|| &lt; \epsilon, ||P_y| - |Q_y|| &lt; \epsilon,
+ and
+ ||P_z| - |Q_z|| &lt; \epsilon, then
+ P = Q.
+ 
+         <p><code>epsilon()</code> returns different values, depending on whether
+ <code>real</code> is <code>float</code> or <code>double</code>:
+ If <code>real</code> is <code>float</code> (the default), <code>epsilon()</code>
+ returns 0.00001. 
+ If <code>real</code> is <code>double</code>, it returns 0.000000001.
+ 
+         <p><b>Please note</b>:  I haven't tested whether 0.000000001 is a good
+ value yet, so users should be aware of this if they set <code>real</code> to
+ <code>double</code>!<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ The way to test this is to start with two <code>Points</code>
+ P and Q at different locations. 
+ Then they should be transformed using different rotations in such a way
+ that they should end up at the same location. 
+ Let \epsilon stand for the value returned by <code>epsilon()</code>,
+ and let x, y, and y stand for
+ the <code>world_coordinates</code> of the <code>Points</code> after
+ <code>apply_transform()</code> has been called on them. 
+ If x_P = x_Q, y_P = y_Q, and
+ z_P = z_Q,
+ \epsilon is a good value.
+ 
+         <p>Rotation causes a significant loss of precision to due to the use of the
+ <code>sin()</code> and <code>cos()</code> functions.  Therefore, neither
+ <code>Point::epsilon()</code> nor <code>Transform::epsilon()</code>
+ (see <a href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Tranform Reference; Returning Information</a>)
+ can be as small as I'd like them to be.  If they are two
+ small, operations that test for equality of <code>Transforms</code> and
+ <code>Points</code> will return <code>false</code> for objects that should be
+ equal. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> For that matter, I haven't really tested whether 0.00001 is a
+ good value when <code>real</code> is <code>float</code>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Information-for-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Information-for-Transforms.html
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+ <html lang="en">
+ <head>
+ <title>Returning Information for Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Querying-Transforms.html#Querying-Transforms" title="Querying Transforms">
+ <link rel="next" href="Showing-Transforms.html#Showing-Transforms" title="Showing Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Information-for-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Showing-Transforms.html#Showing-Transforms">Showing Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.8 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: real <b>epsilon</b> (<var>void</var>)<var><a name="index-epsilon-280"></a></var><br>
+ <blockquote><p>Returns the positive <code>real</code> value of smallest magnitude
+ \epsilon which an element of a <code>Transform</code> should
+ contain.  An element of a <code>Transform</code> may also contain
+ -\epsilon.
+ 
+         <p>The value \epsilon is used for in the
+ function <code>clean()</code> (see <a href="Cleaning-Transforms.html#Cleaning-Transforms">Transform Reference; Cleaning</a>). 
+ It will also be used for comparing <code>Transforms</code>, when I've added
+ the equality operator <code>Transform::operator==()</code>.
+ 
+         <p><code>epsilon()</code> returns different values, depending on whether
+ <code>real</code> is <code>float</code> or <code>double</code>:
+ If <code>real</code> is <code>float</code> (the default), <code>epsilon()</code>
+ returns 0.00001. 
+ If <code>real</code> is <code>double</code>, it returns 0.000000001.
+ 
+         <p><b>Please note</b>:  I haven't tested whether 0.000000001 is a good
+ value yet, so users should be aware of this if they set <code>real</code> to
+ <code>double</code>!<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ The way to test this is to transform two different
+ <code>Transforms</code>
+ t_1 and t_2
+ using different rotations in such a way that the end
+ result should be the same for both <code>Transforms</code>. 
+ Let \epsilon stand for the value returned by <code>epsilon()</code>. 
+ If for all sets of
+ corresponding elements E_1 and E_2 of t_1 and
+ t_2, ||E_1| - |E_2|| \le \epsilon, then
+ \epsilon is a good value. 
+ <!-- !! TO DO: -->
+ It will be easier to test this when I've added
+ <code>Transform::operator==()</code>.
+ 
+         <p>Rotation causes a significant loss of precision to due to the use of the
+ <code>sin()</code> and <code>cos()</code> functions.  Therefore, neither
+ <code>Transform::epsilon()</code> nor <code>Point::epsilon()</code>
+ (see <a href="Returning-Information-for-Points.html#Returning-Information-for-Points">Point Reference; Returning Information</a>) can be as small as I'd like them to be.  If they are two
+ small, operations that test for equality of <code>Transforms</code> and
+ <code>Points</code> will return <code>false</code> for objects that should be equal. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> For that matter, I haven't really tested whether 0.00001 is a
+ good value when <code>real</code> is <code>float</code>.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Returning-Points-for-Rectangles.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Returning-Points-for-Rectangles.html
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+ <html lang="en">
+ <head>
+ <title>Returning Points for Rectangles - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Rectangle-Reference.html#Rectangle-Reference" title="Rectangle Reference">
+ <link rel="prev" href="Rectangle-Operators.html#Rectangle-Operators" title="Rectangle Operators">
+ <link rel="next" href="Querying-Rectangles.html#Querying-Rectangles" title="Querying Rectangles">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Returning-Points-for-Rectangles"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Rectangle-Operators.html#Rectangle-Operators">Rectangle Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">29.4 Returning Points</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Point <b>corner</b> (<var>unsigned short c</var>)<var><a name="index-corner-683"></a></var><br>
+ <blockquote><p>Returns the corner <code>Point</code> indicated by the argument <var>c</var>, which must be
+ between 0 and 3. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>mid_point</b> (<var>unsigned short m</var>)<var><a name="index-mid_005fpoint-684"></a></var><br>
+ <blockquote><p>Returns the mid-point of one of the sides.  The argument <var>c</var> must be
+ between 0 and 3. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Rotating-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Rotating-Points.html
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+ <html lang="en">
+ <head>
+ <title>Rotating Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="prev" href="Shearing-Points.html#Shearing-Points" title="Shearing Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Rotating-Points"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shearing-Points.html#Shearing-Points">Shearing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">3.4 Rotating</h3>
+ 
+ <!-- !! TO DO:  Make illustration. -->
+ <p>The function <code>rotate()</code> rotates a <code>Point</code> about one or more of
+ the main axes. 
+ It takes three <code>real</code> arguments, specifying the
+ angles of rotation in degrees about the x, y, and z-axes respectively. 
+ Only the first argument is required, the other two are 0 by default.  If
+ rotation about the y-axis, or the y and z-axes only are required, then 0
+ must be used as a placeholder for the first and possibly the second
+ argument.
+ 
+ <pre class="example">     Point p(0, 1);
+      p.rotate(90);
+      p.show("p:");
+      -| p: (0, 0, -1)
+      p.rotate(0, 90);
+      p.show("p:");
+      -| p: (1, 0, 0)
+      p.rotate(0, 0, 90);
+      p.show("p:");
+      -| p: (0, 1, 0)
+ </pre>
+    <p>The rotations are performed successively about the
+ x, y, and z-axes.  However, rotation is not a commutative
+ operation, so if rotation about the main axes in a different
+ order is required, then <code>rotate()</code> must be invoked more than once:
+ 
+ <pre class="example">     Point A(2, 3, 4);
+      Point B(A);
+      A.rotate(30, 60, 90);
+      A.show("A:");
+      -| A: (-4.59808, -0.700962, 2.7141)
+      B.rotate(0, 0, 90);
+      B.rotate(0, 60);
+      B.rotate(30);
+      B.show("B:");
+      -| B: (-4.9641, 1.43301, -1.51795)
+ </pre>
+    <p>Rotation need not be about the main axes;  it can also be performed
+ about a line defined by two <code>Points</code>.  The function <code>rotate()</code>
+ with two <code>Point</code> arguments and a <code>real</code> argument for the
+ angle of rotation (in degrees) about the axis.  The <code>real</code> argument
+ is optional, with
+ 180 degrees
+ 
+    <p>as the default.
+ 
+ <!-- !! TO DO:  Simplify this example.  How did I get the original values -->
+ <!-- for @code{p0} and @code{p1}? -->
+ <!-- Make illustration larger, put values in illustration. -->
+ <pre class="example">     Point p0 (-1.06066, 0, 1.06066);
+      Point p1 (1.06066, 0, -1.06066);
+      p1 *= p0.rotate(0, 30, 30);
+      p0.show("p0:");
+      -| p0: (-1.25477, -0.724444, 0.388228)
+      p1.show("p1:");
+      -| p1: (1.25477, 0.724444, -0.388228)
+      p0.draw(p1);
+      Point p2(1.06066, 0, 1.06066);
+      p2.show("p2:");
+      -| p2: (1.06066, 0, 1.06066)
+      Point p3(p2);
+      p3.rotate(p1, p0, 45);
+      p3.show("p3:");
+      -| p3 (1.09721, 1.15036, 1.17879)
+      Point p4(p2);
+      p4.rotate(p1, p0, 90);
+      p4.show("p4:");
+      -| p4: (0.882625, 2.05122, 0.485242)
+      Point p5(p2);
+      p5.rotate(p1, p0, 135);
+      p5.show("p5:");
+      -| p5: (0.542606, 2.17488, -0.613716)
+      Point p6(p2);
+      p6.rotate(p1, p0);
+      p6.show("p6:");
+      -| p6: (0.276332, 1.44889, -1.47433)
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF2.png"
+ alt="[Figure 2. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 2. 
+ <br>
+ </p>
+ 
+    <p><a name="index-bugs-34"></a>I have sometimes gotten erroneous results using <code>rotate()</code> for
+ rotation about two <code>Points</code>.  It's usually worked to reverse the
+ order of the <code>Point</code> arguments, or to change sign of the angle
+ argument.  I think I've fixed the problem, though.
+ 
+ <!-- chapter Transforms -->
+ <!-- gstransf.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Roulettes-and-Involutes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Roulettes-and-Involutes.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Roulettes and Involutes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Pattern-Reference.html#Pattern-Reference" title="Pattern Reference">
+ <link rel="prev" href="Plane-Tesselations.html#Plane-Tesselations" title="Plane Tesselations">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Roulettes-and-Involutes"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Tesselations.html#Plane-Tesselations">Plane Tesselations</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">33.2 Roulettes and Involutes</h3>
+ 
+ <blockquote>
+ &ldquo;A <dfn>roulette</dfn> is the curve generated by a point which is carried by
+ a curve which rolls on a fixed curve. [<small class="dots">...</small>]  The locus of a point
+ carried by a circle rolling on a straight line is a <dfn>trochoid</dfn>.  If
+ the point is inside the circle the trochoid has inflexions;  if it is
+ outside the circle, but rigidly attached to it, the trochoid has loops. 
+ [<small class="dots">...</small>]  In the particular case when the point is on the circumference
+ of the rolling circle the roulette is a <dfn>cycloid</dfn>.  When the circle
+ rolls on the outside of another circle the corresponding curves are the
+ <dfn>epitrochoids</dfn> and <dfn>epicycloids</dfn>;  if it rolls on the inside,
+ they are the <dfn>hypotrochoids</dfn> and <dfn>hypocycloids</dfn>.&rdquo;
+ <div align="right">H. Martyn Cundy and A. P. Rollett, <em>Mathematical Models</em>, p. 46.
+    </div>
+ </blockquote>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Epicycloids.html#Epicycloids">Epicycloids</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Running-3DLDF.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Running-3DLDF.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Running-3DLDF.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Running-3DLDF.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,207 ----
+ <html lang="en">
+ <head>
+ <title>Running 3DLDF - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF" title="Installing and Running 3DLDF">
+ <link rel="prev" href="Installing-3DLDF.html#Installing-3DLDF" title="Installing 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Running-3DLDF"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Installing-3DLDF.html#Installing-3DLDF">Installing 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">11.2 Running 3DLDF</h3>
+ 
+ <p>To use 3DLDF, call
+ <samp><span class="command">make run</span></samp> from the command line in the
+ shell.  The working directory should be
+ <samp><span class="file">3DLDF-1.1.5.1/</span></samp> or <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>. 
+ Either will work, but the latter may be more convenient, because
+ this is the location of the CWEB, TeX and MetaPost files that you'll
+ be editing. 
+ Alternatively, call <samp><span class="command">ldfr</span></samp>, which is merely a
+ shell script that calls <samp><span class="command">make run</span></samp>. 
+ This takes care of running <samp><span class="command">3dldf</span></samp>, MetaPost, TeX,
+ and <samp><span class="command">dvips</span></samp>, producing a PostScript file containing your
+ drawings.  You can display the latter on your terminal using Ghostview
+ or some other
+ PostScript viewer, print it out, and whatever else you like to do with
+ PostScript files.
+ 
+    <p>However, you can also perform the actions performed by
+ <samp><span class="command">make run</span></samp> by hand, by writing your own shell
+ scripts, by defining Emacs-Lisp commands, or in other ways.  Even if you
+ choose to use <samp><span class="command">make run</span></samp>, it's important to understand what it
+ does.  The following explains how to do this by hand.
+ 
+    <p>The CWEB source files for 3DLDF are in the subdirectory
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp>.  They
+ must be <samp><span class="command">ctangled</span></samp>, and the resulting C++
+  files must be
+ compiled and
+ linked, in order to create the executable file <samp><span class="file">3dldf</span></samp>. 
+ The C++
+  files and header files generated by <samp><span class="command">ctangle</span></samp>,
+ the object files generated by the compiler, and the executable
+ <samp><span class="file">3dldf</span></samp> all  reside in <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp>. Therefore, the
+ latter must be your working directory.
+ 
+    <p>Since 3DLDF has no input routine as yet,
+ as explained in <a href="No-Input-Routine.html#No-Input-Routine">No Input Routine</a>,
+ it is necessary to add C++
+  code to the function <code>main()</code> in
+ <samp><span class="file">main.web</span></samp>, and/or in a separate function in another file.  In the
+ latter case, the function containing the user code must be invoked in
+ <code>main()</code>.  Look for the line &ldquo;Your code here!&rdquo; in
+ <samp><span class="file">main.web</span></samp>.
+ 
+    <p>This is an example of what you could write in <code>main()</code>. 
+ Feel free to make it more complicated, if you wish.
+ 
+ <pre class="example">     beginfig(1);
+      default_focus.set(2, 3, -10, 2, 3, 10, 20);
+      Rectangle R(origin, 5, 3);
+      Circle C(origin, 3, 90);
+      C.half(180).filldraw(black, light_gray);
+      R.filldraw();
+      C.half().filldraw(black, light_gray);
+      Point p = C.get_point(4);
+      p.shift(0, -.5 * p.get_y());
+      p.label("$C$", "");
+      Point q = R.get_mid_point(0);
+      q.shift(0, 0, -.5 * q.get_z());
+      q.label("$R$", "");
+      current_picture.output(default_focus, PERSP, 1, NO_SORT);
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF72.png"
+ alt="[Figure 72. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 72. 
+ <br>
+ </p>
+ 
+      <ol type=1 start=1>
+ <li>Save <samp><span class="file">main.web</span></samp>, and any other CWEB files you've changed. 
+ Since these files have changed, they must be <samp><span class="command">ctangled</span></samp>, and the
+ resulting C++
+  files must be recompiled.  If you've changed any files
+ other than
+ <samp><span class="file">main.web</span></samp>, <samp><span class="command">ctangle</span></samp> will also generate a header
+ file for each of these files.  If a header file differs from the version
+ that existed before <samp><span class="command">ctangle</span></samp> was run, all of the C++
+  files
+ that depend on it must be recompiled.  Then <samp><span class="file">3dldf</span></samp> must be
+ relinked.  To do this, call <samp><span class="command">make 3dldf</span></samp> from the command line.
+ 
+      <p>If you've made any errors in typing your code, the
+ compiler should have issued error messages, so go back into
+ the appropriate CWEB file and correct your errors.  Then call
+ <samp><span class="command">make 3dldf</span></samp> again.
+ 
+      <li>Call <samp><span class="command">CWEB/3dldf</span></samp> at the command line.  It writes a
+ file of MetaPost code called <samp><span class="file">3DLDFput.mp</span></samp>.
+ 
+      <li>Run MetaPost on the file <samp><span class="file">3DLDFmp.mp</span></samp>, which inputs
+ <samp><span class="file">3DLDFput.mp</span></samp>.
+ 
+      <pre class="example">          mpost 3DLDFput
+ </pre>
+      <p class="noindent">The result is an Encapsulated PostScript file
+ <samp><span class="file">3DLDFput.</span></samp>&lt;<i>integer</i>&gt; for each figure in your drawing.
+ 
+      <li>The file <samp><span class="file">3DLDFtex.tex</span></samp> should contain code for including the
+ <samp><span class="file">3DLDFput.</span></samp>&lt;<i>integer</i>&gt; files.  This is an example taken from
+ the <samp><span class="file">3DLDFtex.tex</span></samp> included in the distribution. 
+ You may change it to suit your purposes.
+ 
+      <pre class="example">          \vbox to \vsize{\vskip 2cm
+           \line{\hskip 2cm Figure 1.\hss}%
+           \vfil
+           \line{\hskip 2cm\epsffile{3DLDFmp.1}\hss}%
+           \vss}
+ </pre>
+      <li>Run TeX on <samp><span class="file">3DLDFtex.tex</span></samp> to produce the DVI file,
+ <samp><span class="file">3DLDFtex.dvi</span></samp>.
+ 
+      <pre class="example">          tex 3DLDFtex
+ </pre>
+      <li>Run <samp><span class="command">dvips</span></samp> on the DVI file to produce the PostScript file,
+ <samp><span class="file">3DLDFtex.ps</span></samp>.
+ 
+      <pre class="example">          dvips -o 3DLDFtex.ps 3DLDFtex
+ </pre>
+      <li><samp><span class="file">3DLDFtex.ps</span></samp> can be viewed using Ghostview, it can be printed using
+ <samp><span class="command">lpr</span></samp> (on a Unix-like system),  you can convert it to PDF with
+ <code>ps2pdf</code>, or to some other format using the appropriate program.
+         </ol>
+ 
+    <p>I sincerely hope that it worked.  If it didn't, ask your local computer
+ wizard for help.
+ 
+    <p>On the computer I'm using, I found that <code>special</code> arguments for
+ setting <code>landscape</code> and <code>papersize</code> in TeX files for
+ DIN A3 landscape didn't work.  Ghostview cut off the right sides of the
+ drawings.  Nor did it work to call
+ <samp><span class="command">dvips -t landscape -t a3</span></samp>. 
+ This caused an error message which said that
+ <code>landscape</code> would be ignored.  When I called <samp><span class="command">dvips</span></samp>
+ with the <samp><span class="option">-t landscape</span></samp> option alone, it worked, and
+ Ghostview showed the entire drawing.
+ 
+    <p>Another problem was Adobe Acrobat.  It would display the entire DIN A3
+ page, but not always in landscape format.  I was unable to find a way of
+ rotating the pages in Acrobat.  I finally found out, that if I included
+ even a single letter of text in a label, Acrobat would display the
+ document correctly.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>
+ <li><a accesskey="2" href="Command-Line-Arguments.html#Command-Line-Arguments">Command Line Arguments</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Scaling-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Scaling-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Scaling-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Scaling-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,82 ----
+ <html lang="en">
+ <head>
+ <title>Scaling Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="prev" href="Shifting-Points.html#Shifting-Points" title="Shifting Points">
+ <link rel="next" href="Shearing-Points.html#Shearing-Points" title="Shearing Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Scaling-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Shearing-Points.html#Shearing-Points">Shearing Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shifting-Points.html#Shifting-Points">Shifting Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">3.2 Scaling</h3>
+ 
+ <p>The function <code>scale()</code> takes three <code>real</code> arguments. 
+ The x, y, and z-coordinates of the <code>Point</code> are
+ multiplied by the first, second, and third arguments respectively.  Only
+ the first argument is required;  the default for the others is 1.
+ 
+    <p>If one wants to perform scaling in either the y-dimension only, or the y
+ and z-dimensions only, a dummy argument of 1 must be passed for
+ scaling in the x-dimension.  Similarly, if one wants to perform scaling
+ in the z-dimension only, dummy arguments of 1 must be passed for scaling
+ in the x and y-dimensions.
+ 
+ <pre class="example">     Point p0(1, 2, 3);
+      p0.scale(2, 3, 4);
+      p0.show("p0:");
+      -| p0: (2, 6, 12)
+      p0.scale(2);
+      p0.show("p0:");
+      -| p0: (4, 6, 12)
+      p0.scale(1, 3);
+      p0.show("p0:");
+      -| p0: (4, 18, 12)
+      p0.scale(1, 1, 3);
+      p0.show("p0:");
+      -| p0: (4, 18, 36)
+ </pre>
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Semi_002dRegular-Archimedean-Polyhedra.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Semi_002dRegular-Archimedean-Polyhedra.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Semi_002dRegular-Archimedean-Polyhedra.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Semi-Regular Archimedean Polyhedra - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link rel="prev" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Semi-Regular-Archimedean-Polyhedra"></a>
+ <a name="Semi_002dRegular-Archimedean-Polyhedra"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">37.3 Semi-Regular Archimedean Polyhedra</h3>
+ 
+ <p>Once I've added <code>class Octahedron</code>, the only Platonic polyhedron I
+ haven't programmed yet, I plan to start adding classes
+ for the semi-regular Archimedean polyhedra.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>
+ </ul>
+ 
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-Solid-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-Solid-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-Solid-Members.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-Solid-Members.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,65 ----
+ <html lang="en">
+ <head>
+ <title>Setting Solid Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Copying-Solids.html#Copying-Solids" title="Copying Solids">
+ <link rel="next" href="Querying-Solids.html#Querying-Solids" title="Querying Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Setting-Solid-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Solids.html#Querying-Solids">Querying Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Copying-Solids.html#Copying-Solids">Copying Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.6 Setting Members</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = </var><code>true</code>])<var><a name="index-set_005fon_005ffree_005fstore-797"></a></var><br>
+ <blockquote><p>Sets <code>on_free_store</code> to <var>b</var>.  This function is
+ called in the  template function
+ <code>create_new()</code>. 
+ See <a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-Values-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-Values-Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-Values-Transforms.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-Values-Transforms.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,72 ----
+ <html lang="en">
+ <head>
+ <title>Setting Values Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Matrix-Inversion.html#Matrix-Inversion" title="Matrix Inversion">
+ <link rel="next" href="Querying-Transforms.html#Querying-Transforms" title="Querying Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Setting-Values-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Matrix-Inversion.html#Matrix-Inversion">Matrix Inversion</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.6 Setting Values</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_element</b> (<var>const unsigned short row, const unsigned short col, real r</var>)<var><a name="index-set_005felement-277"></a></var><br>
+ <blockquote><p>Sets the element of <code>matrix</code> indicated by the arguments to <var>r</var>.
+ 
+      <pre class="example">          Transform t;
+           t.set_element(0, 2, -3.45569);
+           t.show("t:");
+           -| t:
+                 1       0   -3.46       0
+                 0       1       0       0
+                 0       0       1       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-and-Assigning-to-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-and-Assigning-to-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Setting-and-Assigning-to-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Setting-and-Assigning-to-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,99 ----
+ <html lang="en">
+ <head>
+ <title>Setting and Assigning to Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Points.html#Points" title="Points">
+ <link rel="prev" href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points" title="Declaring and Initializing Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Setting-and-Assigning-to-Points"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Points.html#Points">Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">2.2 Setting and Assigning to Points</h3>
+ 
+ <p><a name="index-Point_003a_003aoperator_003d-30"></a><a name="index-operator_003d-_0028for-Points_0029-31"></a><a name="index-Point_003a_003aset-32"></a><a name="index-set-_0028for-Points_0029-33"></a>It is possible to change the value of the coordinates of <code>Points</code>
+ by using the <dfn>assignment operator</dfn> <code>=</code>
+ (<code>Point::operator=()</code>) or the function <code>Point::set()</code>
+ (with appropriate arguments):
+ 
+ <pre class="example">     Point pt0(2, 3.3, 7);
+      Point pt1;
+      pt1 = pt0;
+      pt0.set(34, 99, 107.5);
+      pt0.show("pt0:");
+      -| pt0: (34, 99, 107.5)
+      pt1.show("pt1:");
+      -| pt1: (2, 3.3, 7)
+ </pre>
+    <p>In this example, <code>pt0</code> is initialized with the coordinates <code>(2, 3.3, 7)</code>,
+ and <code>pt1</code> with the coordinates <code>(0, 0, 0)</code>. 
+ <code>pt1 = pt0</code> causes <code>pt1</code> to have the same coordinates as
+ <code>pt0</code>, then the coordinates of <code>pt0</code> are changed to <code>(34,
+ 99, 107.5)</code>. This doesn't affect <code>pt1</code>, whose coordinates remain
+ <code>(2, 3.3, 7)</code>.
+ 
+    <p>Another way of declaring and initializing <code>Points</code> is by using the
+ <dfn>copy constructor</dfn>:
+ 
+ <pre class="example">     Point pt0(1, 3.5, 19);
+      Point pt1(pt0);
+      Point pt2 = pt0;
+      Point pt3;
+      pt3 = pt0;
+ </pre>
+    <p>In this example, <code>pt1</code> and <code>pt2</code> are both declared and
+ initialized using the copy constructor;  <code>Point pt2 = pt0</code> does not
+ invoke the assignment operator.  <code>pt3</code>, on the other hand, is
+ declared using the default constructor, and not initialized.  In the
+ following line, <code>pt3 = pt0</code> does invoke the assignment operator,
+ thus resetting the coordinate values of <code>pt3</code> to those of
+ <code>pt0</code>.
+ 
+ <!-- chapter Transforming Points -->
+ <!-- gstranpt.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shadows.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shadows.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shadows.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shadows.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Shadows - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Future-Plans.html#Future-Plans" title="Future Plans">
+ <link rel="prev" href="Curves-and-Surfaces.html#Curves-and-Surfaces" title="Curves and Surfaces">
+ <link rel="next" href="Multi_002dThreading.html#Multi_002dThreading" title="Multi-Threading">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shadows"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Multi_002dThreading.html#Multi_002dThreading">Multi-Threading</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Future-Plans.html#Future-Plans">Future Plans</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">40.3 Shadows, Reflections, and Rendering</h3>
+ 
+ <p><a name="index-shadows-907"></a><a name="index-reflections-908"></a>Shadows and reflections are closely related to transformations and
+ projections. 
+ A shadow is the projection of the outline of an object onto a surface or
+ surfaces, and reflection in a plane is an affine transformation.
+ 
+    <p><a name="index-shading-909"></a>3D rendering software generally implements shadows, or more generally,
+ <dfn>shading</dfn>, reflections, and certain other effects using methods
+ involving the calculation of individual pixel values. 
+ Surface hiding is also often implemented at the pixel level. 
+ 3DLDF does no scan converting ((see <a href="Accuracy.html#Accuracy">Accuracy</a>), and hence
+ no calculation of pixel values at all, so these methods cannot be
+ used in 3DLDF at present.
+ 
+    <p>However, it is possible to define functions for generating
+ shadows and reflections within 3DLDF by other means.
+ 
+    <p>I have defined the function <code>Point::reflect()</code> for reflecting a
+ <code>Point</code> in a <code>Plane</code>, and have begun definining versions for
+ other classes.
+ 
+    <p>However, in order for reflections to work, I must define functions for
+ breaking up objects into smaller units.  This is also necessary for
+ surface hiding to work properly.
+ 
+    <p>For MetaPost output, I will have to implement shadows, reflections, and
+ surface hiding in this way.  However, 3DLDF could be made to produce
+ output in other formats.  There are two possibilities:  implementing
+ rendering functionality within 3DLDF, or interfacing to
+ existing rendering software.  If I decide to do the latter, there are
+ again two possibilities:  having 3DLDF write output in a format that a
+ renderer can input, or linking to a library supplied by a rendering
+ package.
+ 
+    <p>I haven't yet decided which course to pursue.  However, in the long run,
+ I'd like it to be possible to use 3DLDF for fancier graphics than is
+ currently possible using MetaPost and PostScript alone.
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shape-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shape-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Shape Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="next" href="Shape-Operators.html#Shape-Operators" title="Shape Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shape-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Shape-Operators.html#Shape-Operators">Shape Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected static constants: signed short <b>DRAWDOT</b><var><a name="index-DRAWDOT-233"></a></var><br>
+ &mdash; : signed short <b>DRAW</b><var><a name="index-DRAW-234"></a></var><br>
+ &mdash; : signed short <b>FILL</b><var><a name="index-FILL-235"></a></var><br>
+ &mdash; : signed short <b>FILLDRAW</b><var><a name="index-FILLDRAW-236"></a></var><br>
+ &mdash; : signed short <b>UNDRAWDOT</b><var><a name="index-UNDRAWDOT-237"></a></var><br>
+ &mdash; : signed short <b>UNDRAW</b><var><a name="index-UNDRAW-238"></a></var><br>
+ &mdash; : signed short <b>UNFILL</b><var><a name="index-UNFILL-239"></a></var><br>
+ &mdash; : signed short <b>UNFILLDRAW</b><var><a name="index-UNFILLDRAW-240"></a></var><br>
+ <blockquote><p>Values used in the <code>output()</code> functions of the classes derived from
+ <code>Shape</code>.  For example, in <code>Path</code>, if the data member
+ <code>fill_draw_value</code> = <code>DRAW</code>, then the MetaPost command
+ <code>draw</code> is written to <code>out_stream</code> when that <code>Path</code> is
+ output. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shape-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shape-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shape-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shape-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Shape Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Shape-Data-Members.html#Shape-Data-Members" title="Shape Data Members">
+ <link rel="next" href="Copying-Shapes.html#Copying-Shapes" title="Copying Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shape-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Copying-Shapes.html#Copying-Shapes">Copying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.2 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-241"></a></var><br>
+      </div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shape-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shape-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shape-Reference.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shape-Reference.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Shape Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Input-and-Output.html#Input-and-Output" title="Input and Output">
+ <link rel="next" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shape-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Input-and-Output.html#Input-and-Output">Input and Output</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">18 Shape Reference</h2>
+ 
+ <p><a name="index-Shape-232"></a>Class <code>Shape</code> is defined in <samp><span class="file">shapes.web</span></samp>.
+ 
+    <p><code>Shape</code> is an <dfn>abstract class</dfn>, which means that
+ all of its member functions are pure virtual functions, and
+ that it's only used as a base class, i.e., no objects of type
+ <code>Shape</code> may be declared.
+ 
+    <p>All of the &ldquo;drawable&rdquo; types in 3DLDF, <code>Point</code>,
+ <code>Path</code>, <code>Ellipse</code>, etc., are derived from <code>Shape</code>.
+ 
+    <p>Deriving all of the drawable types from <code>Shape</code> makes it possible
+ to handle objects of different types in the same way.  This is
+ especially important in the <code>Picture</code> functions, where objects of
+ various types (but all derived from <code>Shape</code>) are accessed through
+ pointers to <code>Shape</code>.  See <a href="Picture-Reference.html#Picture-Reference">Picture Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a>
+ <li><a accesskey="2" href="Shape-Operators.html#Shape-Operators">Shape Operators</a>
+ <li><a accesskey="3" href="Copying-Shapes.html#Copying-Shapes">Copying Shapes</a>
+ <li><a accesskey="4" href="Modifying-Shapes.html#Modifying-Shapes">Modifying Shapes</a>
+ <li><a accesskey="5" href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>
+ <li><a accesskey="6" href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>
+ <li><a accesskey="7" href="Clearing-Shapes.html#Clearing-Shapes">Clearing Shapes</a>
+ <li><a accesskey="8" href="Querying-Shapes.html#Querying-Shapes">Querying Shapes</a>
+ <li><a accesskey="9" href="Showing-Shapes.html#Showing-Shapes">Showing Shapes</a>
+ <li><a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shearing-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shearing-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shearing-Points.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Shearing Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="prev" href="Scaling-Points.html#Scaling-Points" title="Scaling Points">
+ <link rel="next" href="Rotating-Points.html#Rotating-Points" title="Rotating Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shearing-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rotating-Points.html#Rotating-Points">Rotating Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Scaling-Points.html#Scaling-Points">Scaling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">3.3 Shearing</h3>
+ 
+ <p>Shearing is more complicated than shifting or scaling.  The function
+ <code>shear()</code> takes six <code>real</code> arguments. 
+ If p is a <code>Point</code>, then <code>p.shear(a, b, c, d, e, f)</code> sets
+ x_p to x_p + ay_p + bz_p, y_p to
+ y_p + cx_p + dz_p, and
+ z_p to z_p + ex_p + fy_p. 
+ In this way, each coordinate of a <code>Point</code> is modified based on the
+ values of the other two coordinates, whereby the influence of the
+ other coordinates on the new value is weighted according to the
+ arguments.
+ 
+ <pre class="example">     Point p(1, 1, 1);
+      p.shear(1);
+      p.show("p:");
+      -| p: (2, 1, 1)
+      p.set(1, 1, 1);
+      p.shear(1, 1);
+      p.show("p:");
+      -| p: (3, 1, 1)
+      p.set(1, 1, 1);
+      p.shear(1, 1, 2, 2, 3, 3);
+      p.show("p:");
+      -| p: (3, 5, 7)
+ </pre>
+    <!-- I've copied the following example from -->
+ <!-- the node ``Affine Transformations for Points''. -->
+    <p>[next figure]
+  demonstrates the effect of shearing the points of a rectangle
+ in the x-y plane.
+ 
+ <pre class="example">     Point P0;
+      Point P1(3);
+      Point P2(3, 3);
+      Point P3(0, 3);
+      Rectangle r(p0, p1, p2, p3);
+      r.draw();
+      Rectangle q(r);
+      q.shear(1.5);
+      q.draw(black, "evenly");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF1.png"
+ alt="[Figure 1. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 1. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shifting-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Shifting-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Shifting-Points.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Shifting Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="prev" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="next" href="Scaling-Points.html#Scaling-Points" title="Scaling Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Shifting-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Scaling-Points.html#Scaling-Points">Scaling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">3.1 Shifting</h3>
+ 
+ <p>The function
+ <code>shift()</code>
+ adds its arguments to the corresponding
+ <code>world_coordinates</code> of a <code>Point</code>.  In the following example,
+ the function <code>show()</code> is used to print the <code>world_coordinates</code>
+ of <code>p0</code> to standard output.
+ 
+ <pre class="example">     Point p0(0, 0, 0);
+      p0.shift(1, 2, 3);
+      p0.show("p0:");
+      -| p0: (1, 2, 3)
+      p0.shift(10);
+      p0.show("p0:");
+      -| p0: (11, 2, 3)
+      p0.shift(0, 20);
+      p0.show("p0:");
+      -| p0: (11, 22, 3)
+      p0.shift(0, 0, 30);
+      p0.show("p0:");
+      -| p0: (11, 22, 33)
+ </pre>
+    <p class="noindent"><code>shift</code> takes three <code>real</code> arguments, whereby the second and
+ third are optional.  To shift a <code>Point</code> in the direction of
+ the positive or negative y-axis, and/or the positive or negative z-axis
+ only, then a 0 argument for the
+ x direction, and possibly one for the y direction
+ must be used as placeholders, as in the example above.
+ 
+    <p><code>shift()</code> can be invoked with a <code>Point</code> argument
+ instead of <code>real</code> arguments.  In this case, the x, y, and
+ z-coordinates of the argument are used for shifting the <code>Point</code>:
+ 
+ <pre class="example">     Point a(10, 10, 10);
+      Point b(1, 2, 3);
+      a.shift(b);
+      a.show("a:")
+      -| a: (11, 12, 13)
+ </pre>
+    <p>Another way of shifting <code>Points</code> is to use the binary <code>+=</code>
+ operator (<code>Point::operator+=()</code>)  with a <code>Point</code>
+ argument.
+ 
+ <pre class="example">     Point a0(1, 1, 1);
+      Point a1(2, 2, 2);
+      a0 += a1;
+      a0.show("a0:");
+      -| a0: (3, 3, 3)
+ </pre>
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Colors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Colors.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Colors.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Colors.html	Wed Nov 13 19:06:17 2013
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+ <html lang="en">
+ <head>
+ <title>Showing Colors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link rel="prev" href="Modifying-Colors.html#Modifying-Colors" title="Modifying Colors">
+ <link rel="next" href="Querying-Colors.html#Querying-Colors" title="Querying Colors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Colors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Colors.html#Querying-Colors">Querying Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">16.5 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-188"></a></var><br>
+ <blockquote><p>Prints information about the <code>Color</code> to standard output. 
+ If <var>text</var> is not the empty <code>string</code>, prints <var>text</var> on a
+ line of its own.  Otherwise, it prints &ldquo;Color:&rdquo;.  Then it prints
+ <code>name</code>, <code>use_name</code>, <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Focuses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Focuses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Focuses.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,69 ----
+ <html lang="en">
+ <head>
+ <title>Showing Focuses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Focus-Reference.html#Focus-Reference" title="Focus Reference">
+ <link rel="prev" href="Querying-Focuses.html#Querying-Focuses" title="Querying Focuses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Focuses"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">23.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>const string text_str = "Focus:", </var>[<var>const bool show_transforms = false</var>]])<var><a name="index-show-498"></a></var><br>
+ <blockquote><p>Prints <var>text_str</var> to standard output (<code>stdout</code>), then calls
+ <code>Point::show()</code> on <code>position</code>, <code>direction</code>, and
+ <code>up</code>.  Then the values of <code>distance</code>, <code>axis</code>, and
+ <code>angle</code> are printed to <code>stdout</code>.  If <var>show_transforms</var> is
+ <code>true</code>, <code>transform</code> and <code>persp</code> are shown as well. 
+ </p></blockquote></div>
+ 
+ <!-- line.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Paths.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Paths.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Paths.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Paths.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,151 ----
+ <html lang="en">
+ <head>
+ <title>Showing Paths - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Path-Reference.html#Path-Reference" title="Path Reference">
+ <link rel="prev" href="Labelling-Paths.html#Labelling-Paths" title="Labelling Paths">
+ <link rel="next" href="Querying-Paths.html#Querying-Paths" title="Querying Paths">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Paths"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Querying-Paths.html#Querying-Paths">Querying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">26.14 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-606"></a></var><br>
+ <blockquote><p>Prints information about the <code>Path</code> to standard output
+ (<code>stdout</code>).  <var>text</var> is simply printed out, unless it's the
+ empty string, in which case <code>"Path:"</code> is printed out. 
+ <var>coords</var> indicates which set of coordinates should be shown.  Valid values are
+ <code>'w'</code> for the <code>world_coordinates</code>, <code>'p'</code> for the
+ <code>projective_coordinates</code>, <code>'u'</code> for the
+ <code>user_coordinates</code>, and <code>'v'</code> for the <code>view_coordinates</code>,
+ whereby the latter two are currently not in use
+ (see <a href="Point-Data-Members.html#Point-Data-Members">Point Reference; Data Members</a>). 
+ If <var>do_apply</var> is <code>true</code>, <code>apply_transform()</code> is called
+ on each <code>Point</code>, updating its <code>world_coordinates</code> and
+ resetting its <code>transform</code>.  Otherwise,
+ it's not. 
+ The arguments <var>do_persp</var>, <var>f</var>, <var>proj</var>, and <var>factor</var> are only
+ relevant when showing <code>projective_coordinates</code>.  If <code>do_persp</code>
+ is <code>true</code>, the <code>Points</code> are projected using the values of
+ <var>f</var>, <var>proj</var>, and <var>factor</var>
+ (see <a href="Outputting-Paths.html#Outputting-Paths">Path Reference; Outputting</a>). 
+ Otherwise, the values currently
+ stored in <code>projective_coordinates</code> are shown. 
+ The <code>Points</code> and connectors are printed out alternately to standard
+ output, followed by the word &ldquo;cycle&rdquo;, if <code>cycle_switch = true</code>.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+      <pre class="example">          default_focus.set(0, 3, -10, 0, 3, 10, 10);
+           Reg_Polygon r(origin, 5, 3, 45);
+           r.fill(gray);
+           Point p[10];
+           for (int i = 0; i &lt; 5; ++i)
+               p[i] = r.get_point(i);
+           p[5] = Point::intersection_point(p[4], p[0], p[2], p[1]).pt;
+           p[6] = Point::intersection_point(p[0], p[1], p[2], p[3]).pt;
+           p[7] = Point::intersection_point(p[1], p[2], p[4], p[3]).pt;
+           p[8] = Point::intersection_point(p[2], p[3], p[0], p[4]).pt;
+           p[9] = Point::intersection_point(p[3], p[4], p[0], p[1]).pt;
+           Path q("--", true, &amp;p[0], &amp;p[5], &amp;p[1], &amp;p[6], &amp;p[2], &amp;p[7],
+                  &amp;p[3], &amp;p[8], &amp;p[4], &amp;p[9], 0);
+           q.draw();
+           q.show("q:");
+           -| q:
+           fill_draw_value == 0
+           (0, 1.06066, 1.06066)
+           -- (-2.30826, 2.24651, 2.24651)
+           -- (-1.42658, 0.327762, 0.327762)
+           -- (-3.73485, -0.858092, -0.858092)
+           -- (-0.881678, -0.858092, -0.858092)
+           -- (4.92996e-07, -2.77684, -2.77684)
+           -- (0.881678, -0.858092, -0.858092)
+           -- (3.73485, -0.858092, -0.858092)
+           -- (1.42658, 0.327762, 0.327762)
+           -- (2.30826, 2.24651, 2.24651) -- cycle;
+           q.show("q:", 'p');
+           -| q:
+           fill_draw_value == 0
+           Projective coordinates.
+           (0, -1.75337, 0.0958948)
+           -- (-1.88483, -0.615265, 0.183441)
+           -- (-1.38131, -2.58743, 0.031736)
+           -- (-4.08541, -4.22023, -0.0938636)
+           -- (-0.964435, -4.22023, -0.0938636)
+           -- (0, -7.99767, -0.384436)
+           -- (0.964436, -4.22023, -0.0938636)
+           -- (4.08541, -4.22023, -0.0938636)
+           -- (1.38131, -2.58743, 0.031736)
+           -- (1.88483, -0.615266, 0.183441) -- cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF135.png"
+ alt="[Figure 135. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 135. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_colors</b> ([<var>bool  = </var><code>false</code>])<var><a name="index-show_005fcolors-607"></a></var><br>
+ <blockquote><p>Shows the values of <code>draw_color</code> and <code>fill_color</code>.  These will
+ normally be 0, unless the <code>Path</code> is on a <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> The following example shows only one <code>Point</code> per
+ line.  In actual use, two <code>Points</code> are shown, but this causes
+ overfull boxes in Texinfo.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Pictures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Pictures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Pictures.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Pictures.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,88 ----
+ <html lang="en">
+ <head>
+ <title>Showing Pictures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Picture-Reference.html#Picture-Reference" title="Picture Reference">
+ <link rel="prev" href="Modifying-Pictures.html#Modifying-Pictures" title="Modifying Pictures">
+ <link rel="next" href="Outputting-Pictures.html#Outputting-Pictures" title="Outputting Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Pictures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">21.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show</b> ([<var>string text = "", </var>[<var>bool stop = </var><code>false</code>]])<var><a name="index-show-323"></a></var><br>
+ <blockquote><p>Prints information about the <code>Picture</code> to standard output.
+ 
+         <p><code>show()</code> first prints the string <code>"Showing Picture:"</code> to
+ standard output, followed by <var>text</var>, if the latter is not the empty
+ string (<code>""</code>)<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>. 
+ Then it calls <code>transform.show()</code>, prints the size of <code>shapes</code> and
+ <code>labels</code>, and the value of <code>do_labels</code>.  Then it calls
+ <code>show()</code> on each of the <code>Shapes</code> on <code>shapes</code>.  Since
+ <code>show()</code> is a <code>virtual</code> function in <code>class Shape</code>, the
+ appropriate <code>show()</code> is called for each <code>Shape</code>, i.e.,
+ <code>Point::show()</code> for a <code>Point</code>, <code>Path::show()</code> for a
+ <code>Path</code>, etc.  If <var>stop</var> is <code>true</code>, execution stops and the
+ user is requested to type &lt;RETURN&gt; to continue.  Finally, the string
+ <code>"Done showing picture."</code> is printed to standard output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_transform</b> ([<var>string text = "Transform from Picture:"</var>])<var><a name="index-show_005ftransform-324"></a></var><br>
+ <blockquote><p>Calls <code>transform.show()</code>, passing <var>text</var> as the argument to the
+ latter function. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Actually, it's printed to standard output
+ even if it is the empty string, you just don't see it.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,91 ----
+ <html lang="en">
+ <head>
+ <title>Showing Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Labelling-Points.html#Labelling-Points" title="Labelling Points">
+ <link rel="next" href="Outputting-Points.html#Outputting-Points" title="Outputting Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Points.html#Outputting-Points">Outputting Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Labelling-Points.html#Labelling-Points">Labelling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.20 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::persp, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-461"></a></var><br>
+ <blockquote><p>Prints <var>text</var> followed by the values of a set of coordinates to
+ standard output (<code>stdout</code>).  The other arguments are similar to
+ those used in the functions described in <a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a>.
+ 
+      <pre class="example">          Point P(1, 3, 5);
+           P.rotate(15, 67, 98);
+           P.show("P:");
+           -| P: (-3.68621, -3.89112, 2.50421)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_transform</b> ([<var>string text = ""</var>])<var><a name="index-show_005ftransform-462"></a></var><br>
+ <blockquote><p>Prints <var>text</var> to standard output (<code>stdout</code>),
+ or <code>"transform:"</code>, if <var>text</var> is the empty <code>string</code> (the
+ default), and then
+ calls <code>transform.show()</code>.
+ 
+      <pre class="example">          Point A(-1, 1, 1);
+           Point B(13, 12, 6);
+           Point Q(31, 17.31, 6);
+           Q.rotate(A, B, 32);
+           Q.show_transform("Q.transform:");
+           -| Q.transform:
+              Transform:
+                0.935   0.212  -0.284       0
+              -0.0749   0.902   0.426       0
+                0.346  -0.377   0.859       0
+               -0.336   0.687  -0.569       1
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Shapes.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Shapes.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Shapes.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,65 ----
+ <html lang="en">
+ <head>
+ <title>Showing Shapes - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="prev" href="Querying-Shapes.html#Querying-Shapes" title="Querying Shapes">
+ <link rel="next" href="Outputting-Shapes.html#Outputting-Shapes" title="Outputting Shapes">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Shapes"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Querying-Shapes.html#Querying-Shapes">Querying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">18.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = 0, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-252"></a></var><br>
+ <blockquote><p>Prints information about an object to standard output. 
+ See the descriptions of <code>show()</code> for the classes derived from
+ <code>Shape</code> for more information. 
+ <!-- !! TO DO:  !! DESCRIBE ARGUMENTS!! -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Solids.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Solids.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Solids.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Solids.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Showing Solids - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids" title="Returning Elements and Information Solids">
+ <link rel="next" href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids" title="Affine Transformations for Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Solids"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: <code>void</code> <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-811"></a></var><br>
+ <blockquote><p>Prints <var>text</var> and the value of <code>on_free_store</code> to the standard
+ output (<code>stdout</code>), and then calls
+ <code>show()</code> on the objects pointed to by the pointers on
+ <code>paths</code>, <code>circles</code>, <code>ellipses</code>, <code>reg_polygons</code>, and
+ <code>rectangles</code>, unless the vectors are empty.  The arguments are
+ passed to <code>Path::show()</code>, <code>Ellipse::show()</code>, etc.  If a vector
+ is empty, a message to this effect is printed to the standard output. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing-Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing-Transforms.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,84 ----
+ <html lang="en">
+ <head>
+ <title>Showing Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms" title="Returning Information for Transforms">
+ <link rel="next" href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms" title="Affine Transformations for Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing-Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Returning Information for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-281"></a></var><br>
+ <blockquote><p>If the optional argument <var>text</var> is used, and is not the empty
+ <code>string</code> (<var>""</var>), <var>text</var> is printed on a line of its own to
+ the standard output first.  Otherwise, <code>"Transform:"</code> is printed
+ on a line of its own to the standard output. 
+ Then, the elements of <code>matrix</code> are printed to standard output.
+ 
+      <pre class="example">          Transform t;
+           t.show("t:");
+           -| t:
+                 1       0       0       0
+                 0       1       0       0
+                 0       0       1       0
+                 0       0       0       1
+           t.scale(1, 2, 3);
+           t.shift(1, 1, 1);
+           t.rotate(90, 90, 90);
+           t.show("t:");
+           -| t:
+                 0       0       1       0
+                 0       2       0       0
+                -3       0       0       0
+                -1       1       1       1
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Showing.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Showing.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,87 ----
+ <html lang="en">
+ <head>
+ <title>Showing - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Line-Reference.html#Line-Reference" title="Line Reference">
+ <link rel="prev" href="Get-Path.html#Get-Path" title="Get Path">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Showing"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Get-Path.html#Get-Path">Get Path</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">24.6 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-507"></a></var><br>
+ <blockquote><p>If <var>text</var> is not the empty <code>string</code> (the default), it is
+ printed on a line of its own to standard output.  Otherwise, &lsquo;<samp><span class="samp">Line:</span></samp>&rsquo;
+ is printed.  Following this, <code>Point::show()</code> is called on
+ <code>position</code> and <code>direction</code>.
+ 
+      <pre class="example">          Point p(1, -2, 3);
+           Point d(-12.3, 21, 36.002);
+           Line L0(p, d);
+           L0.show("L0:");
+           -| L0:
+              position: (1, -2, 3)
+              direction: (-12.3, 21, 36.002)
+           Line L1 = p.get_line(d);
+           L1.show("L1:");
+           -| L1:
+              position: (1, -2, 3)
+              direction: (-13.3, 23, 33.002)
+           Path q = L1.get_path();
+           q.show("q:");
+           -| q:
+              fill_draw_value == 0
+              (1, -2, 3) -- (-12.3, 21, 36.002);
+ </pre>
+         </blockquote></div>
+ 
+ <!-- plane.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,82 ----
+ <html lang="en">
+ <head>
+ <title>Solid Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Solid-Data-Members.html#Solid-Data-Members" title="Solid Data Members">
+ <link rel="next" href="Solid-Destructor.html#Solid-Destructor" title="Solid Destructor">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solid-Destructor.html#Solid-Destructor">Solid Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: <code>void</code> <b>Solid</b> (<code>void</code>)<var><a name="index-Solid-789"></a></var><br>
+ <blockquote><p>Creates an empty <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: <code>void</code> <b>Solid</b> (<var>const Solid&amp; s</var>)<var><a name="index-Solid-790"></a></var><br>
+ <blockquote><p>Creates a new <code>Solid</code> and makes it a copy of <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Solid* <b>create_new&lt;Solid&gt;</b> (<var>const Solid* s</var>)<var><a name="index-create_005fnew_003cSolid_003e-791"></a></var><br>
+ &mdash; : Solid* <b>create_new&lt;Solid&gt;</b> (<var>const Solid&amp; s</var>)<var><a name="index-create_005fnew_003cSolid_003e-792"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Solids</code>. 
+ They create a <code>Solid</code> on the free store and allocate memory for it using
+ <code>new(Solid)</code>.  They return a pointer to the new <code>Solid</code>.
+ 
+         <p>If <var>s</var> is a non-zero pointer or a reference,
+ the new <code>Solid</code> will be a copy of
+ <var>s</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Solid&gt;()</code> as its argument. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Solid Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="next" href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions" title="Solid Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-775"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Solid</code> was dynamically allocated on the free
+ store, otherwise <code>false</code>.  <code>Solids</code> should only be allocated
+ on the free store by <code>create_new&lt;Solid&gt;()</code>, or analogous functions
+ for derived classes. 
+ See <a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: Point <b>center</b><var><a name="index-center-776"></a></var><br>
+ <blockquote><p>The center of the <code>Solid</code>.  An object of a type derived from
+ <code>Solid</code> need not have a meaningful <code>center</code>.  However, many
+ do, so it's convenient to be able to access it using the member
+ functions of <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-777"></a></var><br>
+ <blockquote><p>Set to <code>false</code> in <code>Picture::output()</code>, if the <code>Solid</code>
+ cannot be projected using the arguments of that particular invocation of
+ <code>output()</code>.  Reset to <code>true</code> at the end of
+ <code>Picture::output()</code>, so that the <code>Solid</code> will be tested for
+ projectability again, if <code>output()</code> is called on the
+ <code>Picture</code> again. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variables: vector&lt;Path*&gt; <b>paths</b><var><a name="index-paths-778"></a></var><br>
+ &mdash; : vector&lt;Circle*&gt; <b>circles</b><var><a name="index-circles-779"></a></var><br>
+ &mdash; : vector&lt;Ellipse*&gt; <b>ellipses</b><var><a name="index-ellipses-780"></a></var><br>
+ &mdash; : vector &lt;Reg_Polygon*&gt; <b>reg_polygons</b><var><a name="index-reg_005fpolygons-781"></a></var><br>
+ &mdash; : vector&lt;Rectangle*&gt; <b>rectangles</b><var><a name="index-rectangles-782"></a></var><br>
+ <blockquote><p>Vectors of pointers to the <code>Paths</code>, <code>Circles</code>,
+ <code>Ellipses</code>, <code>Reg_Polygons</code>, and <code>Rectangles</code>,
+ respectively, belonging to the <code>Solid</code>, if any exist. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-783"></a></var><br>
+ <blockquote><p>The maximum and minimum values for the x, y, and z-coordinates of the
+ <code>Points</code> belonging to the <code>Solid</code>.  Used in
+ <code>Picture::output()</code> for testing whether a <code>Solid</code> is
+ projectable using a particular set of arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static <code>const</code> variables: unsigned short <b>CIRCLE</b><var><a name="index-CIRCLE-784"></a></var><br>
+ &mdash; : unsigned short <b>ELLIPSE</b><var><a name="index-ELLIPSE-785"></a></var><br>
+ &mdash; : unsigned short <b>PATH</b><var><a name="index-PATH-786"></a></var><br>
+ &mdash; : unsigned short <b>RECTANGLE</b><var><a name="index-RECTANGLE-787"></a></var><br>
+ &mdash; : unsigned short <b>REG_POLYGON</b><var><a name="index-REG_005fPOLYGON-788"></a></var><br>
+ <blockquote><p>Used as arguments in the functions <code>get_shape_ptr()</code> and
+ <code>get_shape_center()</code>
+ (see <a href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information</a>). 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Destructor.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Destructor.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Destructor.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Solid Destructor - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions" title="Solid Constructors and Setting Functions">
+ <link rel="next" href="Solid-Operators.html#Solid-Operators" title="Solid Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Destructor"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Solid-Operators.html#Solid-Operators">Solid Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.3 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Solid</b> (<code>void</code>)<var><a name="index-g_t_007eSolid-793"></a></var><br>
+ <blockquote><p>This function currently has an empty definition, but its existence
+ prevents GCC 3.3 from issuing the following warning:
+ &ldquo;`class Solid' has virtual functions but non-virtual destructor&rdquo;. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Figures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Figures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Figures.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Solid Figures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Plane-Figures.html#Plane-Figures" title="Plane Figures">
+ <link rel="next" href="Pictures.html#Pictures" title="Pictures">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Figures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Pictures.html#Pictures">Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">8 Solid Figures</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Cuboid-Getstart.html#Cuboid-Getstart">Cuboid Getstart</a>
+ <li><a accesskey="2" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>
+ </ul>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Operators.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Operators.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Operators.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,69 ----
+ <html lang="en">
+ <head>
+ <title>Solid Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Solid-Reference.html#Solid-Reference" title="Solid Reference">
+ <link rel="prev" href="Solid-Destructor.html#Solid-Destructor" title="Solid Destructor">
+ <link rel="next" href="Copying-Solids.html#Copying-Solids" title="Copying Solids">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Copying-Solids.html#Copying-Solids">Copying Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Solid-Destructor.html#Solid-Destructor">Solid Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">34.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: const Solid&amp; <b>operator=</b> (<var>const Solid&amp; s</var>)<var><a name="index-operator_003d-794"></a></var><br>
+ <blockquote><p>Assignment operator.  Makes <code>*this</code> a copy of <var>s</var>, discarding
+ the old contents of <code>*this</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-795"></a></var><br>
+ <blockquote><p>Multiplication by a <code>Transform</code>.  All of the <code>Shapes</code> that
+ make up the <code>Solid</code> are transformed by <var>t</var>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid-Reference.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,79 ----
+ <html lang="en">
+ <head>
+ <title>Solid Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Pattern-Reference.html#Pattern-Reference" title="Pattern Reference">
+ <link rel="next" href="Faced-Solid-Reference.html#Faced-Solid-Reference" title="Faced Solid Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">34 Solid Reference</h2>
+ 
+ <p><a name="index-Solid-774"></a>Class <code>Solid</code> is defined in <samp><span class="file">solids.web</span></samp>. 
+ It's derived from <code>Shape</code> using public derivation.  It is intended
+ to be used as a base class for
+ more specialized classes representing solid figures, e.g., cuboids,
+ polyhedra, solids of rotation, etc.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a>
+ <li><a accesskey="2" href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Solid-Destructor.html#Solid-Destructor">Solid Destructor</a>
+ <li><a accesskey="4" href="Solid-Operators.html#Solid-Operators">Solid Operators</a>
+ <li><a accesskey="5" href="Copying-Solids.html#Copying-Solids">Copying Solids</a>
+ <li><a accesskey="6" href="Setting-Solid-Members.html#Setting-Solid-Members">Setting Solid Members</a>
+ <li><a accesskey="7" href="Querying-Solids.html#Querying-Solids">Querying Solids</a>
+ <li><a accesskey="8" href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <li><a accesskey="9" href="Showing-Solids.html#Showing-Solids">Showing Solids</a>
+ <li><a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>
+ <li><a href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>
+ <li><a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a>
+ <li><a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>
+ <li><a href="Clearing-Solids.html#Clearing-Solids">Clearing Solids</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid_005fFaced-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solid_005fFaced-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solid_005fFaced-Data-Members.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Solid_Faced Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Faced-Solid-Reference.html#Faced-Solid-Reference" title="Faced Solid Reference">
+ <link rel="prev" href="Faced-Solid-Reference.html#Faced-Solid-Reference" title="Faced Solid Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solid_Faced-Data-Members"></a>
+ <a name="Solid_005fFaced-Data-Members"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">35.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>faces</b><var><a name="index-faces-837"></a></var><br>
+ <blockquote><p>The number of faces of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>vertices</b><var><a name="index-vertices-838"></a></var><br>
+ <blockquote><p>The number of vertices of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>edges</b><var><a name="index-edges-839"></a></var><br>
+ <blockquote><p>The number of edges of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <!-- cuboid.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solving-Ellipses.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Solving-Ellipses.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Solving-Ellipses.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,112 ----
+ <html lang="en">
+ <head>
+ <title>Solving Ellipses - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Ellipse-Reference.html#Ellipse-Reference" title="Ellipse Reference">
+ <link rel="prev" href="Ellipse-Intersections.html#Ellipse-Intersections" title="Ellipse Intersections">
+ <link rel="next" href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses" title="Rectangles for Ellipses">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Solving-Ellipses"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">31.10 Solving</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_pair <b>solve</b> (<var>char axis_unknown, real known</var>)<var><a name="index-solve-753"></a></var><br>
+ <blockquote><p>Returns two possible values for either the horizontal or vertical
+ coordinate.  This function assumes that the <code>Ellipse</code> lies in a major
+ plane with <code>center</code> at the origin.  Code that calls it must ensure
+ that these conditions are fulfilled. 
+ <!-- !! TO DO: Add EXAMPLE!! -->
+ 
+         <p><code>solve()</code> is called in
+ <code>Reg_Cl_Plane_Curve::intersection_points(Point, Point, Point)</code> and
+ <code>Reg_Cl_Plane_Curve::location()</code>, and
+ resolves to this function, when these functions are called on an
+ <code>Ellipse</code>.  However, <code>Ellipse::location()</code> overloads
+ <code>Reg_Cl_Plane_Curve::location()</code>, so the latter won't normally be
+ called on an <code>Ellipse</code>. 
+ See <a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>, and
+ <a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Regular Closed Plane Curve Reference; Querying</a>.
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_triple <b>get_coefficients</b> (<var>real Slope, real v_intercept</var>)<var><a name="index-get_005fcoefficients-754"></a></var><br>
+ <blockquote>
+         <p>Let x and y stand for the x and y-coordinates of a point on an
+ ellipse in the x-y plane, a for half of the horizontal axis
+ (<code>axis_h</code> / 2),
+ and b for half of the vertical axis
+ (<code>axis_v</code> / 2).
+ 
+         <p>Further, let y = mx + i be the equation of a line in
+ the x-y plane, where m is the slope and i the
+ y-intercept.
+ 
+         <p>This function returns the coefficients of the quadratic equation
+ that results from replacing y with mx + i
+ in the equation for the ellipse
+ 
+      <pre class="display">          x^2/a^2 + y^2/b^2 = 1<br>
+ </pre>
+         <p>namely
+      <pre class="display">          x^2/a^2 + (mx + i)^2/b^2 - 1 = 0
+           == (b^2x + a^2m^2)x^2 + 2a^2imx + (a^2i^2 - a^2b^2) = 0.
+ </pre>
+         <p>The coefficients are returned in the <code>real_triple</code> in the order
+ one would expect: <code>r.first</code> is the coefficient of x^2, <code>r.second</code> of
+ x and <code>r.third</code> of the constant term
+ (x^0 == 1).
+ 
+         <p><code>get_coefficients()</code> is called in
+ <code>Reg_Cl_Plane_Curve::intersection_points(Point, Point, Point)</code>, and
+ resolves to this function, when the latter is called on an
+ <code>Ellipse</code>. 
+ See <a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Sources-of-Information.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Sources-of-Information.html
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+ <html lang="en">
+ <head>
+ <title>Sources of Information - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="prev" href="Introduction.html#Introduction" title="Introduction">
+ <link rel="next" href="About-This-Manual.html#About-This-Manual" title="About This Manual">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Sources-of-Information"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="About-This-Manual.html#About-This-Manual">About This Manual</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Introduction.html#Introduction">Introduction</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Introduction.html#Introduction">Introduction</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">1.1 Sources of Information</h3>
+ 
+ <p>This handbook, and the use of 3DLDF itself, presuppose at least some
+ familiarity on the part of the reader with Metafont, MetaPost,
+ CWEB, and C++
+ .  If you are not familiar with any or all of them, I
+ recommend the following sources of information:
+ 
+    <pre class="sp">
+ 
+ </pre>
+ 
+ Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>. 
+ Computers and Typesetting; C. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>A User's Manual for MetaPost</i>. 
+ AT &amp; T Bell Laboratories. 
+ Murray Hill, NJ. No date.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. and Silvio Levy. 
+ <i>The </i><b>CWEB</b><i> System of Structured Documentation</i>. 
+ Version&nbsp;3.64&mdash;February&nbsp;2002.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The C++
+  Programming Language</i>. 
+ Special Edition. 
+ Reading, Massachusetts 2000. 
+ Addison-Wesley. 
+ ISBN&nbsp;0-201-70073-5.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+    <p><a name="index-CTAN-_0028Comprehensive-_0040TeX_007b_007d-Archive-Network_0029-1"></a><a name="index-Comprehensive-_0040TeX_007b_007d-Archive-Network-_0028CTAN_0029-2"></a>The manuals for MetaPost and CWEB are available from the Comprehensive
+ TeX Archive Network (CTAN).  See one of the following web sites for
+ more information:
+ 
+      <dl>
+ <dt>Germany<dd><a href="http://dante.ctan.org">http://dante.ctan.org</a>, <a href="http://ftp.dante.de">http://ftp.dante.de</a><br>
+ <a href="http://www.dante.de">http://www.dante.de</a>.
+ 
+      <br><dt>United Kingdom<dd><a href="http://www.cam.ctan.org">http://www.cam.ctan.org</a><br>
+ <a href="http://ftp.tex.ac.uk">http://ftp.tex.ac.uk</a>.
+ 
+      <br><dt>USA<dd><a href="http://www.tug.ctan.org">http://www.tug.ctan.org</a><br>
+ <a href="http://www.ctan.tug.org">http://www.ctan.tug.org</a>. 
+ </dl>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Surface-Hiding.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Surface-Hiding.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Surface-Hiding.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,355 ----
+ <html lang="en">
+ <head>
+ <title>Surface Hiding - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Pictures.html#Pictures" title="Pictures">
+ <link rel="prev" href="Focuses-Getstart.html#Focuses-Getstart" title="Focuses Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Surface-Hiding"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Pictures.html#Pictures">Pictures</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">9.3 Surface Hiding</h3>
+ 
+ <!-- !! TO DO:  Write about z-buffers, and how scan converting is needed -->
+ <!-- to use them.  Also, show how to do surface hiding of the two -->
+ <!-- rectangles by hand! -->
+ <p>In [next figure]
+ , <code>Circle</code> <var>c</var> lies in front of <code>Rectangle</code>
+ <var>r</var>. 
+ Since <var>c</var> is drawn and not filled, <var>r</var> is visible behind
+ <var>c</var>.
+ 
+ <pre class="example">     default_focus.set(1, 3, -5, 0, 3, 5, 10);
+      Point p(0, -2, 5);
+      Rectangle r(p, 3, 4, 90);
+      r.draw();
+      Point q(2, -2, 3);
+      Circle c(q, 3, 90);
+      c.draw();
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF64.png"
+ alt="[Figure 64. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 64. 
+ <br>
+ </p>
+ 
+    <p>If instead, <var>c</var> is filled or filldrawn, only the parts of <var>r</var> that are not
+ covered by <var>c</var> should be visible:
+ 
+ <pre class="example">     r.draw();
+      c.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF65.png"
+ alt="[Figure 65. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 65. 
+ <br>
+ </p>
+ 
+    <p>What parts of <code>r</code> are covered depend on the point of view, i.e.,
+ the position and direction of the <code>Focus</code> used for outputting the
+ <code>Picture</code>:
+ 
+ <pre class="example">     default_focus.set(8, 0, -5, 5, 3, 5, 10);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF66.png"
+ alt="[Figure 66. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 66. 
+ <br>
+ </p>
+ 
+    <p><a name="index-surface-hiding-78"></a><a name="index-hidden-surface-algorithm-79"></a>Determining what objects cover other objects in a program for 3D
+ graphics is called
+ <dfn>surface hiding</dfn>,
+ and is performed by a
+ <dfn>hidden surface algorithm</dfn>.  3DLDF currently has a very primitive
+ hidden surface algorithm that only works for the most simple cases.
+ 
+    <p><a name="index-painter_0027s-algorithm-80"></a>The hidden surface algorithm used in 3DLDF is a
+ <dfn>painter's algorithm</dfn>, which means that the objects that are
+ furthest away from the <code>Focus</code> are drawn first, followed by the
+ objects that are closer, which may thereby cover them.  In order to make
+ this possible, the <code>Shapes</code> on a <code>Picture</code> must be sorted
+ before they are output.  They are sorted according to the z-values in
+ the <code>projective_coordinates</code> of the <code>Points</code> belonging to the
+ <code>Shape</code>.  This may seem strange, since the
+ projection is two-dimensional and only the x and y-values from
+ <code>projective_coordinates</code> are written to <code>out_stream</code>. 
+ However, the perspective transformation also produces a z-coordinate,
+ which indicates the distance of the <code>Points</code> from the <code>Focus</code>
+ in the z-dimension.
+ 
+    <p>The problem is, that all <code>Shapes</code>, except <code>Points</code> themselves,
+ consist of multiple <code>Points</code>, that may have different
+ z-coordinates.  3DLDF currently does not yet have a satisfactory way of
+ dealing with this situtation.  In order to try to cope with it, the user
+ can specify four different ways of sorting the <code>Shapes</code>:  They
+ can be sorted according to the maximum z-coordinate, the
+ minimum z-coordinate, the mean of the maximum and minimum z-coordinate
+ (max + min) / 2,
+ and not sorted. 
+ In the last case, the <code>Shapes</code> are output in the order of the
+ drawing and filling commands in the user code. 
+ The z-coordinates referred to are those in
+ <code>projective_coordinates</code>, and will have been calculated for a
+ particular <code>Focus</code>.
+ 
+    <p>The function <code>Picture::output()</code> takes a
+ <code>const unsigned short</code> <var>sort_value</var> argument that specifies
+ which style of sorting
+ should be used.  The namespace <code>Sorting</code> contains the following
+ constants which should be used for <var>sort_value</var>: <code>MAX_Z</code>,
+ <code>MIN_Z</code>, <code>MEAN_Z</code>, and <code>NO_SORT</code>.  The default is
+ <code>MAX_Z</code>.
+ 
+    <p>3DLDF's primitive hidden surface algorithm <em>cannot</em> work for
+ objects that intersect.  The following examples demonstrate why not:
+ 
+ <pre class="example">     using namespace Sorting;
+      using namespace Colors;
+      using namespace Projections;
+      default_focus.set(5, 3, -10, 3, 1, 1, 10, 180);
+      Rectangle r0(origin, 3, 4, 45);
+      Rectangle r1(origin, 2, 6, -45);
+      r0.draw();
+      r1.draw();
+      current_picture.output(default_focus, PERSP, 1, MAX_Z);
+      r0.show("r0:");
+      -| r0:
+      fill_draw_value == 0
+      (-1.5, -1.41421, -1.41421) -- (1.5, -1.41421, -1.41421) --
+      (1.5, 1.41421, 1.41421) -- (-1.5, 1.41421, 1.41421)
+      -- cycle;
+      
+      r0.show("r0:", 'p');
+      -| r0:
+      fill_draw_value == 0
+      Perspective coordinates.
+      (-5.05646, -4.59333, -0.040577) -- (-2.10249, -4.86501, -0.102123) --
+      (-1.18226, -1.33752, 0.156559) -- (-3.51276, -1.2796, 0.193084)
+      -- cycle;
+      
+      r1.show("r1:");
+      -| r1:
+      fill_draw_value == 0
+      (-1, 2.12132, -2.12132) -- (1, 2.12132, -2.12132) --
+      (1, -2.12132, 2.12132) -- (-1, -2.12132, 2.12132)
+      -- cycle;
+      
+      r1.show("r1:", 'p');
+      -| r1:
+      fill_draw_value == 0
+      Perspective coordinates.
+      (-5.09222, -0.995681, -0.133156) -- (-2.98342, -1.03775, -0.181037) --
+      (-1.39791, -4.05125, 0.208945) -- (-2.87319, -3.93975, 0.230717)
+      -- cycle;
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF67.png"
+ alt="[Figure 67. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 67. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , the <code>Rectangles</code> r_0 and r_1 intersect along the
+ x-axis.  The z-values of the <code>world_coordinates</code> of r_0 are
+ -1.41421 and 1.41421 (two <code>Points</code> each), while those of r_1
+ are 2.12132 and  -2.12132.  So r_1 has two <code>Points</code> with
+ z-coordinates greater than the z-coordinate of any <code>Point</code>
+ on r_0, and two <code>Points</code> with z-coordinates less than the
+ z-coordinate of any <code>Point</code> on r_0.  The
+ <code>Points</code> on r_0 and r_1 all have different z-values in
+ their <code>projective_coordinates</code>, but r_1 still has a <code>Point</code>
+ with a z-coordinate greater than that of any of the <code>Points</code> on
+ r_0, and one with a z-coordinate less than that of any of the
+ <code>Points</code> on r_0.
+ 
+    <p>In [next figure]
+ , the <code>Shapes</code> on <code>current_picture</code> are sorted
+ according to the maximum z-values of the <code>projective_coordinates</code>
+ of the <code>Points</code> belonging to the <code>Shapes</code>.  r_1 is
+ filled and drawn first,
+ because it has the <code>Point</code> with the positive z-coordinate of
+ greatest magnitude. 
+ When subsequently r_0 is drawn, it covers part of the top of
+ r_1, which lies in front of r_0, and should be visible:
+ 
+ <pre class="example">     current_picture.output(default_focus, PERSP, 1, MAX_Z);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF68.png"
+ alt="[Figure 68. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 68. 
+ <br>
+ </p>
+ 
+    <p>In [next figure]
+ , the <code>Shapes</code> on <code>current_picture</code> are sorted
+ according to the minimum z-values of the <code>projective_coordinates</code>
+ of the <code>Points</code> belonging to the <code>Shapes</code>.  <code>r1</code> is drawn
+ and filled last, because
+ it has the <code>Point</code> with the negative z-coordinate of greatest
+ magnitude. 
+ It thereby covers the bottom part of
+ <code>r0</code>, which lies in front of <code>r1</code>, and should be visible.
+ 
+ <pre class="example">     current_picture.output(default_focus, PERSP, 1, MIN_Z);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF69.png"
+ alt="[Figure 69. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 69. 
+ <br>
+ </p>
+ 
+    <p>Neither sorting by the mean z-value in the
+ <code>projective_coordinates</code>, nor suppressing sorting does any good. 
+ In each case, one <code>Rectangle</code> is always drawn and filled last,
+ covering parts of the other that lie in front of the first.
+ 
+    <p>3DLDF's hidden surface algorithm will fail wherever objects intersect,
+ not just where one extends past the other in both the positive and
+ negative z-directions.
+ 
+ <pre class="example">     Rectangle r(origin, 3, 4, 45);
+      Circle c(origin, 2, -45);
+      r.filldraw();
+      c.filldraw(black, gray);
+      current_picture.output(default_focus, PERSP, 1, NO_SORT);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF70.png"
+ alt="[Figure 70. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 70. 
+ <br>
+ </p>
+ 
+    <p>Even where objects don't intersect, their projections may.  In order to
+ handle these cases properly, it is necessary to break up the
+ <code>Shapes</code> on a <code>Picture</code> into smaller <code>Shapes</code>, until
+ there are none that intersect or whose projections intersect.  Then, any
+ of the three methods of sorting described above can be used to sort the
+ <code>Shapes</code>, and they can be output.
+ 
+    <p>Before this can be done, 3DLDF must be able to find the intersections of
+ all of the different kinds of <code>Shapes</code>.  If 3DLDF converted solids
+ to polyhedra and curves to sequences of line segments, this would reduce
+ to the problem of finding the intersections of lines and planes, however
+ it does not yet do this.
+ 
+    <p>Even if it did, a fully functional hidden surface algorithm must compare
+ each <code>Shape</code> on a <code>Picture</code> with every other <code>Shape</code>. 
+ Therefore, for n <code>Shapes</code>, there will be
+ n! / ((n - r)! r!) 
+ (possibly time-consuming) comparisons.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF71.png"
+ alt="[Figure 71. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 71. 
+ <br>
+ </p>
+ 
+ <!-- I've put this here, so that it doesn't interfere with the Emacs-Lisp -->
+ <!-- routine I'm using to insert the figure numbers for HTML and Info -->
+ <!-- output.  LDF 2003.12.16. -->
+    <p>Clearly, such a hidden surface
+ algorithm would considerably increase run-time.
+ 
+    <p>Currently, all of the <code>Shapes</code> on a <code>Picture</code> are output, as
+ long as they lie completely within the boundaries passed as arguments to
+ <code>Picture::output()</code>. 
+ See <a href="Outputting-Pictures.html#Outputting-Pictures">Pictures; Outputting</a>.  It
+ would be more efficient to suppress output for them, if they are
+ completely covered by other objects.  This also requires comparisions,
+ and could be implemented together with a fully-functional hidden surface
+ algorithm.
+ 
+    <p>Shadows, reflections, highlights and shading are all effects requiring
+ comparing each <code>Shape</code> with every other <code>Shape</code>, and could
+ greatly increase run-time.
+ 
+ <!-- intersct.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/System-Information.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/System-Information.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/System-Information.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/System-Information.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,90 ----
+ <html lang="en">
+ <head>
+ <title>System Information - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes" title="Dynamic Allocation of Shapes">
+ <link rel="next" href="Color-Reference.html#Color-Reference" title="Color Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="System-Information"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Color-Reference.html#Color-Reference">Color Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">15 System Information</h2>
+ 
+ <p>The functions described in this chapter are all declared in the
+ <code>namespace System</code>.  They are for finding out information
+ about the system on which 3DLDF is being run.  They are declared and
+ defined in <samp><span class="file">pspglb.web</span></samp>, except for the template function
+ <code>get_second_largest()</code>, which is declared and defined in
+ <samp><span class="file">gsltmplt.web</span></samp>.
+ 
+    <p>There are two reasons for this.  The first is that template definitions
+ must be available
+ in the compilation units where specializations are instantiated. 
+ I therefore write the template definition of <code>get_second_largest()</code>
+ to <samp><span class="file">gsltmplt.h</span></samp>, so it can be included by the CWEB files that need
+ it, currently <samp><span class="file">main.web</span></samp> only.  If I
+ wrote it to <samp><span class="file">pspglb.h</span></samp>, it would be included by all of the CWEB
+ files except for <samp><span class="file">loader.web</span></samp>, causing unnecessarily bloated object
+ code.
+ 
+    <p>The other reason is because of the way way 3DLDF is built using Automake
+ and <tt>make</tt>.  I originally tried to define <code>get_second_largest()</code>
+ in <samp><span class="file">pspglb.web</span></samp> and wrote the definition to <samp><span class="file">gsltmplt.cc</span></samp>,
+ which is no problem with CWEB.  However, I was unable to express the
+ dependencies among the CWEB, C++
+ , and object files in such a way that
+ 3DLDF was built properly.
+ 
+    <p>Therefore all template functions will be put into files either by
+ themselves, or in small groups.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Endianness.html#Endianness">Endianness</a>
+ <li><a accesskey="2" href="Register-Width.html#Register-Width">Register Width</a>
+ <li><a accesskey="3" href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">Get Second Largest Real</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Template-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Template-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Template-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Template-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,110 ----
+ <html lang="en">
+ <head>
+ <title>Template Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Installing-3DLDF.html#Installing-3DLDF" title="Installing 3DLDF">
+ <link rel="prev" href="Installing-3DLDF.html#Installing-3DLDF" title="Installing 3DLDF">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Template-Functions"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Installing-3DLDF.html#Installing-3DLDF">Installing 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Installing-3DLDF.html#Installing-3DLDF">Installing 3DLDF</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">11.1.1 Template Functions</h4>
+ 
+ <p><a name="index-templates-101"></a><a name="index-template-functions-102"></a><a name="index-function-templates-103"></a>3DLDF 1.1.5 is the first release that contains <dfn>template functions</dfn>,
+ namely
+ <code>template &lt;class C&gt; C* create_new()</code>, which is defined in
+ <samp><span class="file">creatnew.web</span></samp>, and
+ <code>template &lt;class Real&gt; Real get_second_largest()</code>, which is defined
+ in <code>gsltmplt.web</code>. 
+ See <a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, and
+ <a href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">Get Second Largest Real</a>.
+ 
+    <p>In order for template functions to be instantiated correctly, their
+ <em>definitions</em> must be available in each compilation unit where
+ specializations are declared or used.  For non-template functions, it
+ suffices for their <em>declarations</em> to be available, and their
+ definitions are found at link-time.  For this reason, the
+ definitions of <code>create_new()</code> and <code>get_second_largest()</code> are
+ in their own CWEB files, and are written to their own header files.  The
+ latter are included in the other CWEB files that need them.
+ 
+    <p>In addition, &lsquo;<samp><span class="samp">AM_CXXFLAGS = -frepo</span></samp>&rsquo; has been added to the file
+ <samp><span class="file">Makefile.am</span></samp> in <samp><span class="file">3DLDF-1.1.5/CWEB/</span></samp>, so that the C++
+ 
+    <p>compiler is called using the &lsquo;<samp><span class="samp">-frepo</span></samp>&rsquo; option. 
+ The manual <cite>Using and Porting the GNU Compiler
+ Collection</cite> explains this as follows:
+ 
+    <blockquote>
+ &ldquo;Compile your template-using code with &lsquo;<samp><span class="samp">-frepo</span></samp>&rsquo;. The compiler will
+ generate files with the extension <samp><span class="file">.rpo</span></samp> listing all of the template
+ instantiations used in the corresponding object files which could be
+ instantiated there; the link wrapper, &lsquo;<samp><span class="samp">collect2</span></samp>&rsquo;, will then update the
+ <samp><span class="file">.rpo</span></samp> files to tell the compiler where to place those instantiations and
+ rebuild any affected object files. The link-time overhead is negligible
+ after the first pass, as the compiler will continue to place the
+ instantiations in the same files.&rdquo;<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ </blockquote>
+ 
+    <p>The first time the executable <samp><span class="file">3dldf</span></samp> is built, the files that use
+ the template functions are recompiled one or more times, and the linker
+ is also called several times.  This doesn't happen anymore, once the
+ <samp><span class="file">.rpo</span></samp> files exist.
+ 
+    <p>Template instantiation differs from compiler to compiler, so using
+ template functions will tend to make 3DLDF less portable.  I am no
+ longer able to compile it on the DECalpha Personal Workstation I had
+ been using with the DEC C++
+  compiler. 
+ See <a href="Ports.html#Ports">Ports</a>, for more information.
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Stallman, Richard M. <cite>Using and Porting the GNU Compiler
+ Collection</cite>, p.&nbsp;<!-- /@w -->285.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,112 ----
+ <html lang="en">
+ <head>
+ <title>Tetrahedron Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Tetrahedron.html#Tetrahedron" title="Tetrahedron">
+ <link rel="prev" href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members" title="Tetrahedron Data Members">
+ <link rel="next" href="Tetrahedron-Net.html#Tetrahedron-Net" title="Tetrahedron Net">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Tetrahedron-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Tetrahedron-Net.html#Tetrahedron-Net">Tetrahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">Tetrahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Tetrahedron</b> (<code>void</code>)<var><a name="index-Tetrahedron-859"></a></var><br>
+ <blockquote><p>Creates an empty <code>Tetrahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Tetrahedron</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Tetrahedron-860"></a></var><br>
+ <blockquote><p>Creates a <code>Tetrahedron</code> with its center at the origin. 
+ The faces have enclosing circles of diameter
+ <var>diameter_of_triangle</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Tetrahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Tetrahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+         <p>The center of a <code>Tetrahedron</code> is the intersection of the line
+ segments connecting the vertices with the centers of the opposite
+ faces.
+ 
+      <pre class="example">          Tetrahedron t(origin, 3);
+           t.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF187.png"
+ alt="[Figure 187. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 187. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point P(1, 0, 1);
+           Tetrahedron t(P, 2.75, 30, 32.5, 20);
+           t.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF188.png"
+ alt="[Figure 188. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 188. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-set-861"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Tetrahedron Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Tetrahedron.html#Tetrahedron" title="Tetrahedron">
+ <link rel="prev" href="Tetrahedron.html#Tetrahedron" title="Tetrahedron">
+ <link rel="next" href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions" title="Tetrahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Tetrahedron-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-857"></a></var><br>
+ <blockquote><p>The angle in radians between the faces of the <code>Tetrahedron</code>, namely
+ 70 degrees
+  32'
+ . 
+ Only
+ the Platonic polyhedra have a single dihedral angle, so
+ <code>dihedral_angle</code> is not a member of
+ <code>Polyhedron</code>.  This means that it must be a member of all of the
+ classes representing Platonic polyhedra. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>triangle_radius</b><var><a name="index-triangle_005fradius-858"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a triangular face of the
+ <code>Tetrahedron</code>. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Getstart.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Getstart.html
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+ <html lang="en">
+ <head>
+ <title>Tetrahedron Getstart - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Polyhedron-Getstart.html#Polyhedron-Getstart" title="Polyhedron Getstart">
+ <link rel="prev" href="Polyhedron-Getstart.html#Polyhedron-Getstart" title="Polyhedron Getstart">
+ <link rel="next" href="Dodecahedron-Getstart.html#Dodecahedron-Getstart" title="Dodecahedron Getstart">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Tetrahedron-Getstart"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">Dodecahedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">8.2.1 Tetrahedron</h4>
+ 
+ <p><a name="index-Tetrahedron-65"></a>The center of a tetrahedron is the intersection of the lines from a
+ vertex to the center of the opposite side.  At least, in 3DLDF, this is
+ the <code>center</code> of a <code>Tetrahedron</code>.  I'm not 100 degrees
+  certain
+ that this is mathematically correct.
+ 
+ <pre class="example">     Tetrahedron t(origin, 4);
+      t.draw();
+      t.get_center().dotlabel("$c$");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF39.png"
+ alt="[Figure 39. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 39. 
+ <br>
+ </p>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Net.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron-Net.html
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+ <html lang="en">
+ <head>
+ <title>Tetrahedron Net - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Tetrahedron.html#Tetrahedron" title="Tetrahedron">
+ <link rel="prev" href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions" title="Tetrahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Tetrahedron-Net"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real triangle_diameter</var>)<var><a name="index-get_005fnet-862"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn> of the <code>Tetrahedron</code>, i.e., the
+ two-dimensional pattern of triangles that can be folded into
+ a model of a tetrahedron.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ The net lies in the x-z plane.  The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>.  The center
+ of the middle triangle is at the origin.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Tetrahedron::get_net(2);
+           for (vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+                iter != vrp.end();
+                ++iter)
+             {
+               (**iter).draw();
+             }
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF189.png"
+ alt="[Figure 189. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 189. 
+ <br>
+ </p>
+ 
+         <p>This function is used in the non-default constructor. 
+ See <a href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Tetrahedron; Constructors and Setting Functions</a>. 
+ The constructor starts with the net and rotates three of the triangles
+ about the adjacent vertices of the middle triangle.  Currently, all of
+ the <code>Polyhedron</code> constructors work this way. 
+ However, this is not ideal, because rotation uses the sine and cosine
+ functions, which cause inaccuracies to creep in. 
+ I think there must be a better way of constructing <code>Polyhedra</code>, but
+ I haven't found one yet.
+ 
+         <p>The <code>Polyhedron</code> constructors are also especially
+ sensitive to changes made to <code>Transform::align_with_axis()</code>. 
+ I have already had to rewrite them twice, and since
+ <code>Transform::align_with_axis()</code> may need to be changed or rewritten
+ again, it's possible that the <code>Polyhedron</code> constructors will have
+ to be, too.  It has also occurred in the past, that the <code>Polyhedra</code>
+ were constructed correctly on one platform, using a particular compiler,
+ but not on another platform, using a different compiler. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real triangle_diameter, </var>[<var>bool make_tabs = </var><code>true</code>])<var><a name="index-draw_005fnet-863"></a></var><br>
+ <blockquote><p>Draws the net for a <code>Tetrahedron</code> in the x-y plane. 
+ The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>.  The
+ origin is used as the center of the middle triangle. 
+ The centers of the triangles are numbered. 
+ If the argument <var>make_tabs</var> is used, tabs for gluing and/or sewing a
+ cardboard model of the <code>Tetrahedron</code> together will be drawn, too. 
+ The dots on the tabs mark where to stick the needle through, when sewing
+ the model together (I've had good results with sewing).
+ 
+      <pre class="example">          Tetrahedron::draw_net(3, true);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF190.png"
+ alt="[Figure 190. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 190. 
+ <br>
+ </p>
+ 
+         <p>The net is drawn in the x-y plane, because it currently doesn't work to
+ draw it in the x-z plane.  I haven't gotten around to fixing this
+ problem yet. 
+ </p></blockquote></div>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> Albrecht D&uuml;rer invented this method of constructing polyhedra. 
+ <!-- !! TO DO:  Find citation! -->
+ </p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Tetrahedron.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Tetrahedron.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>Tetrahedron - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link rel="prev" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra" title="Regular Platonic Polyhedra">
+ <link rel="next" href="Dodecahedron.html#Dodecahedron" title="Dodecahedron">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Tetrahedron"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">37.2.1 Tetrahedron</h4>
+ 
+ <p><a name="index-Tetrahedron-856"></a>Class <code>Tetrahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">Tetrahedron Data Members</a>
+ <li><a accesskey="2" href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Tetrahedron-Net.html#Tetrahedron-Net">Tetrahedron Net</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/The-Perspective-Projection.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/The-Perspective-Projection.html
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*** 0 ****
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+ <html lang="en">
+ <head>
+ <title>The Perspective Projection - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Projections.html#Projections" title="Projections">
+ <link rel="prev" href="Parallel-Projections.html#Parallel-Projections" title="Parallel Projections">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="The-Perspective-Projection"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Parallel-Projections.html#Parallel-Projections">Parallel Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Projections.html#Projections">Projections</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">9.1.2 The Perspective Projection</h4>
+ 
+ <p>The perspective projection obeys the laws of
+ <dfn>linear perspective</dfn>. 
+ In 3DLDF, it is performed by means of a
+ transformation, whose effect is, to the
+ best of my knowledge,
+ exactly equivalent to the result of a perspective projection done by
+ hand using vanishing points and rulers.
+ 
+    <p>It is very helpful to the artist to understand the laws of linear
+ perspective, and to know how to make a perspective drawing by hand.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ However, it is a very tedious and error-prone procedure (I know, I've
+ done it).  One of my main motivations for writing 3DLDF was so I
+ wouldn't have to do it anymore.
+ 
+ <!-- !! TO DO:  Mention somewhere, that the ground plane isn't important, -->
+ <!-- and that more could be said on the subject.  For example, what -->
+ <!-- happens when the line of sight is not parallel to the ground plane, -->
+ <!-- and how this is important when using rulers, but not when using -->
+ <!-- transformations.  LDF 2003.08.15. -->
+    <p>[next figure]
+  shows a perspective construction, the way it
+ could be done by hand. 
+ The point of view, or <dfn>focus</dfn> is located 6cm from
+ the picture plane, and 4cm above the ground (or x-z) plane at the point
+ (0, 4, -6). 
+ The rectangle R lies in the ground  plane, with the point r_0 at
+ (2, 0, 1.5).  The right side of R, with length = 2<span class="dmn">cm</span>
+ lies at an angle
+ of 40 to the ground line, which corresponds to the intersection line
+ of the ground plane with the picture plane, and the left side, with
+ length = 5<span class="dmn">cm</span>, at an angle of
+ 90 degrees - 40 degrees = 50 degrees
+ to the ground line.
+ 
+ <!-- !! NOTE:  I haven't been able to get the colons lined up the way I'd -->
+ <!-- like for the explanations of the abbreviations.  LDF 2003.08.15. -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF56.png"
+ alt="[Figure 56. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 56. 
+ <br>
+ </p>
+ 
+    <p>While it's possible to use 3DLDF to make a perspective construction
+ in the traditional way, as [the previous figure]
+  shows, the code for [next figure]
+ 
+    <p>achieves the same result more efficiently:
+ 
+ <pre class="example">     default_focus.set(0, 4, -6, 0, 4, 6, 6);
+      Rectangle r(origin, 2, 5, 0, 40);
+      Point p(2, 0, 1.5);
+      r.shift(p - r.get_point(0));
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF57.png"
+ alt="[Figure 57. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 57. 
+ <br>
+ </p>
+ 
+    <p>In [the second-to-last figure]
+ , it was
+ convenient to start with the corner point r_0;
+ if we needed the center of  R, it would have to be found from the
+ corner points. 
+ However, in 3DLDF, <code>Rectangles</code> are most often constructed about
+ the center.  Therefore, in [next figure]
+ , R is first
+ constructed about the origin, with the
+ rotation about the y-axis passed as an argument to the constructor. 
+ It is then shifted such that <code>*(</code><var>R</var><code>.points[0])</code>, the first
+ (or zeroth, if you will) <code>Point</code> on R comes to lie at
+ (2, 0, 1.5).
+ 
+    <p>Unlike the other transformations currently
+ used in 3DLDF, the perspective transformation is non-affine.  Affine
+ transformations maintain parallelity of lines, while the rules of
+ perspective state that parallel lines, with one exception, appear to
+ recede toward a
+ <!-- !! I believe what I've put in the following footnote is correct, but -->
+ <!-- maybe it's not.  I've had to try to figure it out myself;  I don't -->
+ <!-- remember ever seeing this spelled out before. -->
+ <dfn>vanishing point</dfn>.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+    <p>In [the second-to-last figure]
+ , the lines
+ from r_0 to r_1 and from r_3 to r_2
+ appear to vanish
+ toward the right-hand 40 degrees
+  vanishing point, while
+ the lines from r_0 to r_3 and from r_1 to r_2
+ appear to vanish
+ toward the left-hand 50 degrees
+  vanishing point. 
+ The lower the angle of a
+ vanishing point, the further away it is from the center of vision, as
+ [next figure]
+  shows:
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF58.png"
+ alt="[Figure 58. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 58. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , the 0.5 degrees
+  vanishing point is nearly
+ 5 and 3/4
+ meters away from the CV, and a
+ line receding to it will be very
+ nearly horizontal.  However, the distance from the focus to the CV is
+ only 5<span class="dmn">cm</span>.  As this distance increases, the distance from the
+ CV to a given vanishing point increases proportionately. 
+ If the distance is 30<span class="dmn">cm</span>, a more reasonable value
+ for a drawing, then the x-coordinate of VP 10 degrees
+  is 170.138<span class="dmn">cm</span>, that
+ of VP 5 degrees
+  is 342.902<span class="dmn">cm</span>, and that of VP 0.5 degrees
+  is 3437.66<span class="dmn">cm</span>! 
+ This is the reason
+ why perspective drawings done by hand rarely contain lines receding to
+ the horizon at low angles.
+ 
+    <p>This problem doesn't arise when the perspective transformation is
+ used.  In this case, any angle can be calculated as easily as any other:
+ 
+ <pre class="example">     default_focus.set(0, 4, -6, 0, 4, 6, 6);
+      Rectangle r;
+      Point center(0, 2);
+      r.set(center, 2, 5, 0, 0, 0.5);
+      r.draw();
+      
+      r.set(center, 2, 5, 0, 0, 2.5);
+      r.draw();
+      
+      r.set(center, 2, 5, 0, 0, 5);
+      r.draw();
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF59.png"
+ alt="[Figure 59. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 59. 
+ <br>
+ </p>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> There are many books on linear perspective for artists. 
+ I've found Gwen White's <cite>Perspective.  A Guide for Artists,
+ Architects and Designers</cite> to be particularly good.  Vredeman de Vries,
+ <cite>Perspective</cite> contains beautiful examples of perspective
+ constructions.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> (I believe the following to be correct, but I'm not entirely sure.) 
+ Let vector v be the line of sight.  By definition, the plane of
+ projection will be a plane p, such that vector v is normal to
+ p.  Let q_0 and q_1 be planes such that
+ q_0 == q_1 or q_0 || q_1, and  q_0 is
+ perpendicular to p. 
+ It follows that q_1 is perpendicular to p. 
+ Let l_0 and l_1 be lines, such that l_0 != l_1,
+ l_0 || l_1, l_0 lies within q_0, l_1 lies
+ within q_1,
+ l_0 is perpendicular to vector v, and l_1 is perpendicular
+ to vector v. 
+ Under these circumstances, the projections of l_0 and l_1
+ in p will also be parallel. 
+ </p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Constructors.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transform-Constructors.html
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+ <html lang="en">
+ <head>
+ <title>Transform Constructors - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants" title="Transform Global Variables and Constants">
+ <link rel="next" href="Transform-Operators.html#Transform-Operators" title="Transform Operators">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transform-Constructors"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transform-Operators.html#Transform-Operators">Transform Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Transform</b> (<var>void</var>)<var><a name="index-Transform-267"></a></var><br>
+ <blockquote><p>Creates a <code>Transform</code> containing the identity matrix. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Transform</b> (<var>real r</var>)<var><a name="index-Transform-268"></a></var><br>
+ <blockquote><p>Creates a <code>Transform</code> and sets all of the elements of <var>matrix</var>
+ to <var>r</var>.  Currently, this
+ constructor is never used, but who knows? Maybe someday it will be
+ useful for something. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Transform</b> (<var>real r0_0, real r0_1, real r2, real r0_2, real r0_3, real r1_0, real r1_1, real r1_2, real r1_3, real r2_0, real r2_1, real r2_2, real r2_3, real r3_0, real r3_1, real r3_2, real r3_3</var>)<var><a name="index-Transform-269"></a></var><br>
+ <blockquote><p>Each of the sixteen <code>real</code> arguments is
+ assigned to the corresponding element of <var>matrix</var>:
+ <code>matrix[0][0] = r0_0</code>, <code>matrix[0][1] = r0_1</code>, etc. 
+ Useful for specifying a transformation matrix completely. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transform-Data-Members.html
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+ <html lang="en">
+ <head>
+ <title>Transform Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="next" href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants" title="Transform Global Variables and Constants">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
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+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transform-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Matrix <b>matrix</b><var><a name="index-matrix-263"></a></var><br>
+ <blockquote><p>A 4 X 4
+ 
+         <p>matrix of <code>real</code> representing the actual transformation matrix. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Global-Variables-and-Constants.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transform-Global-Variables-and-Constants.html
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+ <html lang="en">
+ <head>
+ <title>Transform Global Variables and Constants - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Transform-Data-Members.html#Transform-Data-Members" title="Transform Data Members">
+ <link rel="next" href="Transform-Constructors.html#Transform-Constructors" title="Transform Constructors">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transform-Global-Variables-and-Constants"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transform-Constructors.html#Transform-Constructors">Transform Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Data-Members.html#Transform-Data-Members">Transform Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.2 Global Variables and Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Transform <b>user_transform</b><var><a name="index-user_005ftransform-264"></a></var><br>
+ <blockquote><p>Currently has no function.  It is intended to be used for transforming
+ the coordinates of <code>Points</code> between the world coordinate system
+ (WCS) and a user coordinate system (UCS), when routines for managing
+ user coordinate systems are implemented. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: <code>const</code> Transform <b>INVALID_TRANSFORM</b><var><a name="index-INVALID_005fTRANSFORM-265"></a></var><br>
+ <blockquote><p>Every member of <code>matrix</code> in <code>INVALID_TRANSFORM</code> is
+ equal to <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: <code>const</code> Transform <b>IDENTITY_TRANSFORM</b><var><a name="index-IDENTITY_005fTRANSFORM-266"></a></var><br>
+ <blockquote><p>Homogeneous coordinates and <code>Transforms</code> are unchanged by
+ multiplication with <code>IDENTITY_TRANSFORM</code>. 
+ <code>matrix</code> is an identity matrix:
+      <pre class="display">          1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           0 0 0 1
+ </pre>
+         <p>See <a href="Transforms.html#Transforms">Transforms</a>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Operators.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transform-Operators.html
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*** 0 ****
--- 1,228 ----
+ <html lang="en">
+ <head>
+ <title>Transform Operators - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Transform-Reference.html#Transform-Reference" title="Transform Reference">
+ <link rel="prev" href="Transform-Constructors.html#Transform-Constructors" title="Transform Constructors">
+ <link rel="next" href="Matrix-Inversion.html#Matrix-Inversion" title="Matrix Inversion">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transform-Operators"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Matrix-Inversion.html#Matrix-Inversion">Matrix Inversion</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transform-Constructors.html#Transform-Constructors">Transform Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">19.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Transform <b>operator=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_003d-270"></a></var><br>
+ <blockquote><p>Sets <var>*this</var> to <var>t</var> and returns <var>t</var>.  Returning <var>*this</var>
+ would, of course, have exactly the same effect. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: real <b>operator*=</b> (<var>real r</var>)<var><a name="index-operator_002a_003d-271"></a></var><br>
+ <blockquote><p>Multiplication with assignment by a scalar. 
+ This operator multiplies each element
+ E
+ of <code>matrix</code> by
+ the scalar <var>r</var>. 
+ The return value is <code>r</code>.  This makes it possible to
+ chain invocations of this function:
+ For a_x, b_x, c_x, <small class="dots">...</small>, p_x in R
+ ,
+ x in N
+ 
+      <pre class="example">          Transform T0(a_0, b_0, c_0, d_0,
+                        e_0, f_0, g_0, h_0,
+                        i_0, j_0, k_0 l_0,
+                        m_0, n_0, o_0, p_0);
+           Transform T1(a_1, b_1, c_1, d_1,
+                        e_1, f_1, g_1, h_1,
+                        i_1, j_1, k_1 l_1,
+                        m_1, n_1, o_1, p_1);
+           Transform T2(a_2, b_2, c_2, d_2,
+                        e_2, f_2, g_2, h_2,
+                        i_2, j_2, k_2 l_2,
+                        m_2, n_2, o_2, p_2);
+           real r = 5;
+ </pre>
+         <p>Let M_0, M_1, and M_2 stand for
+ <code>T0.matrix</code>, <code>T1.matrix</code>, and <code>T2.matrix</code>
+ respectively:
+ 
+      <pre class="display">          M_0 =
+           a_0 b_0 c_0 d_0
+           e_0 f_0 g_0 h_0
+           i_0 j_0 k_0 l_0
+           m_0 m_0 o_0 p_0
+           
+           M_1 =
+           a_1 b_1 c_1 d_1
+           e_1 f_1 g_1 h_1
+           i_1 j_1 k_1 l_1
+           m_1 m_1 o_1 p_1
+           
+           M_2 =
+           a_2 b_2 c_2 d_2
+           e_2 f_2 g_2 h_2
+           i_2 j_2 k_2 l_2
+           m_2 m_2 o_2 p_2
+ </pre>
+         <pre class="example">          T0 *= T1 *= T2 *= r;
+ </pre>
+         <p>Now,<br>
+      <pre class="display">          M_0 =
+           5a_0 5b_0 5c_0 5d_0
+           5e_0 5f_0 5g_0 5h_0
+           5i_0 5j_0 5k_0 5l_0
+           5m_0 5m_0 5o_0 5p_0
+           
+           M_1 =
+           5a_1 5b_1 5c_1 5d_1
+           5e_1 5f_1 5g_1 5h_1
+           5i_1 5j_1 5k_1 5l_1
+           5m_1 5m_1 5o_1 5p_1
+           
+           M_2 =
+           5a_2 5b_2 5c_2 5d_2
+           5e_2 5f_2 5g_2 5h_2
+           5i_2 5j_2 5k_2 5l_2
+           5m_2 5m_2 5o_2 5p_2
+ </pre>
+         <p>This function is not currently used anywhere, but it may turn out to be
+ useful for something. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Transform <b>operator*</b> (<var>const real r</var>)<var><a name="index-operator_002a-272"></a></var><br>
+ <blockquote><p>Multiplication of a <code>Transform</code> by a scalar without assignment. 
+ The return value is a <code>Transform</code>
+ A. 
+ If <code>this.matrix</code> has elements
+ E_T, then <code>A.matrix</code> has elements E_A such that
+ E_A = r * E_T
+ 
+         <p>for all E. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-273"></a></var><br>
+ <blockquote><p>Performs matrix multiplication on <code>matrix</code> and
+ <code>t.matrix</code>.  The result is assigned to <code>matrix</code>. 
+ <var>t</var> is returned, <em>not</em> <code>*this</code>!  This makes it possible to
+ chain invocations of this function:
+ 
+      <pre class="example">          Transform a;
+           a.shift(1, 1, 1);
+           Transform b;
+           b.rotate(0, 90);
+           Transform c;
+           c.shear(5, 4);
+           Transform d;
+           d.scale(3, 4, 5);
+ </pre>
+         <p>Let a_m, b_m, and c_m stand for
+ <code>a.matrix</code>, <code>b.matrix</code>, <code>c.matrix</code>, and <code>d.matrix</code>
+ respectively:
+      <pre class="display">          a_m =
+           1        0        0        0
+           0        1        0        0
+           0        0        1        0
+           1        1        1        1
+           
+           b_m =
+            0.5      0.5        0.707      0
+            0.146    0.854     -0.5        0
+           -0.854    0.146      0.5        0
+            0        0          0          1
+           
+           c_m =
+            1       12       14        0
+           10        1       15        0
+           11       13        1        0
+            0        0        0        1
+           
+           d_m =
+           3        0        0        0
+           0        4        0        0
+           0        0        5        0
+           0        0        0        1
+ </pre>
+         <p><code>a *= b *= c *= d;</code><br>
+ <code>a</code>, <code>b</code>, and <code>c</code> are transformed by <code>d</code>, which
+ remains unchanged.
+ 
+      <p class="noindent">Now,
+      <pre class="display">          a_m =
+           3        0        0        0
+           0        4        0        0
+           0        0        5        0
+           3        4        5        1
+           
+           b_m =
+            1.5     2       3.54  0
+           -0.439   3.41   -2.5   0
+           -2.56    0.586   2.5   0
+            0       0       0     1
+           
+           c_m =
+            3       48       70        0
+           30        4       75        0
+           33       52        5        0
+            0        0        0        1
+ </pre>
+         <p>d_m is unchanged.
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Transform <b>operator*</b> (<var>const Transform t</var>)<var><a name="index-operator_002a-274"></a></var><br>
+ <blockquote><p>Multiplication of a <code>Transform</code> by another <code>Transform</code> without
+ assignment. 
+ The return value is a <code>Transform</code> whose <code>matrix</code> contains
+ values that are the result of the matrix multiplication of
+ <code>matrix</code> and <code>t.matrix</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Reference.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transform-Reference.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transform-Reference.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Transform Reference - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Shape-Reference.html#Shape-Reference" title="Shape Reference">
+ <link rel="next" href="Label-Reference.html#Label-Reference" title="Label Reference">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transform-Reference"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Label-Reference.html#Label-Reference">Label Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Shape-Reference.html#Shape-Reference">Shape Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">19 Transform Reference</h2>
+ 
+ <p><a name="index-Transform-262"></a>Class <code>Transform</code> is defined in <samp><span class="file">transfor.web</span></samp>. 
+ <code>Point</code> is a <code>friend</code> of <code>Transform</code>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Transform-Data-Members.html#Transform-Data-Members">Transform Data Members</a>
+ <li><a accesskey="2" href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>
+ <li><a accesskey="3" href="Transform-Constructors.html#Transform-Constructors">Transform Constructors </a>
+ <li><a accesskey="4" href="Transform-Operators.html#Transform-Operators">Transform Operators</a>
+ <li><a accesskey="5" href="Matrix-Inversion.html#Matrix-Inversion">Matrix Inversion</a>
+ <li><a accesskey="6" href="Setting-Values-Transforms.html#Setting-Values-Transforms">Setting Values Transforms</a>
+ <li><a accesskey="7" href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a>
+ <li><a accesskey="8" href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Returning Information for Transforms</a>
+ <li><a accesskey="9" href="Showing-Transforms.html#Showing-Transforms">Showing Transforms</a>
+ <li><a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>
+ <li><a href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>
+ <li><a href="Resetting-Transforms.html#Resetting-Transforms">Resetting Transforms</a>
+ <li><a href="Cleaning-Transforms.html#Cleaning-Transforms">Cleaning Transforms</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transforming-Points.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transforming-Points.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transforming-Points.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transforming-Points.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,118 ----
+ <html lang="en">
+ <head>
+ <title>Transforming Points - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Points.html#Points" title="Points">
+ <link rel="next" href="Transforms.html#Transforms" title="Transforms">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transforming-Points"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Transforms.html#Transforms">Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Points.html#Points">Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">3 Transforming Points</h2>
+ 
+ <p><code>Points</code> don't always have to remain in the same place.  There are
+ various ways of moving or <em>transforming</em> them:
+      <ul>
+ <li>Shifting.  This is often called &ldquo;translating&rdquo;, but the operation in Metafont
+ that performs translation is called <code>shift</code>, so I call it &ldquo;shifting&rdquo;.
+ 
+      <li>Scaling.
+ 
+      <li>Shearing.
+ 
+      <li>Rotating about an axis.
+ 
+    </ul>
+ 
+    <p><code>class Point</code> has several member functions
+ for applying these <dfn>affine transformations</dfn><a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ to a <code>Point</code>. 
+ Most of the arguments to these functions are of
+ type <code>real</code>.  As you may know, there is no such data type in C++
+ . 
+ I have defined <code>real</code> using <code>typedef</code> to be either
+ <code>float</code> or <code>double</code>, depending on the value of a preprocessor
+ switch for conditional compilation.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 3DLDF uses many <code>real</code> values and I wanted to be able to
+ change the precision used by making one change (in the file
+ <samp><span class="file">pspglb.web</span></samp>) rather than having to examine all the places in the
+ program where <code>float</code> or <code>double</code> are used.  Unfortunately,
+ setting <code>real</code> to <code>double</code> currently doesn't work.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Shifting-Points.html#Shifting-Points">Shifting Points</a>
+ <li><a accesskey="2" href="Scaling-Points.html#Scaling-Points">Scaling Points</a>
+ <li><a accesskey="3" href="Shearing-Points.html#Shearing-Points">Shearing Points</a>
+ <li><a accesskey="4" href="Rotating-Points.html#Rotating-Points">Rotating Points</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <dfn>Affine transformations</dfn> are operations
+ that have the property that parallelity of
+ lines is maintained.  That is, if two lines (each determined by two
+ points) are parallel before the transformation, they will also be
+ parallel after
+ the transformation.  Affine transformations are discussed in many books
+ about computer graphics and geometry.  For 3DLDF, I've mostly used
+ Jones, <cite>Computer Graphics through Key Mathematics</cite>  and Salomon,
+ <cite>Computer Graphics and Geometric Modeling</cite>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> I try to avoid the use of
+ preprocessor macros as much as possible, for the reasons given by
+ Stroustrup in the <cite>The C++
+  Programming Language</cite>,
+ section
+ 7.8,
+ pp. 160&ndash;163, and
+ <cite>Design and Evolution of C++
+ </cite>, Chapter 18, pp. 423&ndash;426. 
+ However, conditional compilation is one of
+ the tasks that only the preprocessor can perform.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transforms.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transforms.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Transforms.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Transforms.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,196 ----
+ <html lang="en">
+ <head>
+ <title>Transforms - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Transforming-Points.html#Transforming-Points" title="Transforming Points">
+ <link rel="next" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points" title="Drawing and Labeling Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Transforms"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">4 Transforms</h2>
+ 
+ <p><a name="index-Transform-35"></a>When <code>Points</code> are transformed using <code>shift()</code>, <code>shear()</code>,
+ or one of the other transformation functions, the
+ <code>world_coordinates</code> are not modified directly.  Instead,
+ another data member of <code>class Point</code> is used to store the
+ information about the transformation, namely <code>transform</code> of
+ type <code>class Transform</code>.  A <code>Transform</code> object has a single
+ data element of type <code>Matrix</code> and a number of member functions.  A
+ <code>Matrix</code> is
+ simply a
+ 4 X 4
+ array<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ of <code>reals</code>
+ defined using <code>typedef real Matrix[4][4]</code>. 
+ Such a matrix suffices for performing all
+ of the transformations (affine and perspective) possible in
+ three-dimensional space.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ Any combination of transformations can be represented by a single
+ transformation matrix.  This means that consecutive transformations
+ of a <code>Point</code> can be &ldquo;saved up&rdquo; and applied to its coordinates
+ all at once when needed, rather than updating them for each
+ transformation.
+ 
+    <p><a name="index-homogeneous-coordinates-36"></a><code>Transforms</code> work by performing matrix multiplication of
+ <code>Matrix</code> with the homogeneous <code>world_coordinates</code> of
+ <code>Points</code>. 
+ If a set of homogeneous coordinates
+ \alpha = (x, y, z, w)
+ and
+ <pre class="display">     <code>Matrix M</code> =
+      a e i m
+      b f j n
+      c g k o
+      d h l p
+ </pre>
+    <p>then the set of homogeneous coordinates \beta resulting from
+ multiplying \alpha and M is calculated as follows:
+ <pre class="display">     \beta = \alpha\times M = ((xa + yb + zc + wd),  (xe + yf + zg + wh),
+      (xi + yj + zk + wl), (xm + yn + zo + wp))
+ </pre>
+    <p>Please note that each coordinate of \beta can be influenced by all of the
+ coordinates of \alpha.
+ 
+    <p>Operations on
+ matrices are very important in computer graphics applications and are
+ described in many books about computer graphics and geometry.  For
+ 3DLDF, I've mostly used Huw Jones'
+ <cite>Computer Graphics through Key Mathematics</cite>
+ and David Salomon's <cite>Computer Graphics and Geometric Modeling</cite>.
+ 
+    <p><a name="index-Transform-37"></a>It is often useful to declare and use <code>Transform</code> objects in 3DLDF,
+ just as it is for <code>transforms</code> in Metafont.  Transformations can be
+ stored in <code>Transforms</code> and then be used to transform <code>Points</code>
+ by means of <code>Point::operator*=(const Transform&amp;)</code>.
+ 
+ <pre class="example">     <span class="roman">1.</span> Transform t;
+      <span class="roman">2.</span> t.shift(0, 1);
+      <span class="roman">3.</span> Point p(1, 0, 0);
+      <span class="roman">4.</span> p *= t;
+      <span class="roman">5.</span> p.show("p:");
+      -| p: (1, 1, 0)
+ </pre>
+    <p><a name="index-identity-matrix-38"></a><a name="index-matrix_002c-identity-39"></a><a name="index-matrix-operations-40"></a><a name="index-operations_002c-matrix-41"></a>When a <code>Transform</code> is declared (line 1), it is
+ initialized to an <dfn>identity matrix</dfn>.  All identity matrices are
+ square, all of the elements of the main diagonal (upper left to lower
+ right) are 1, and all of the other elements are 0. 
+ So a
+ 4 X 4
+ identity matrix, as used in 3DLDF, looks like this:
+ <pre class="display">     1 0 0 0
+      0 1 0 0
+      0 0 1 0
+      0 0 0 1
+ </pre>
+    <p>If a matrix A is multiplied with an identity matrix I, the result is
+ identical to A, i.e.,
+ A * I = A. 
+ This is the salient property of an identity matrix.
+ 
+    <p>The same affine transformations are applied in the same way to
+ <code>Transforms</code> as they are to <code>Points</code>, i.e., the functions
+ <code>scale()</code>, <code>shift()</code>,
+ <code>shear()</code>, and <code>rotate()</code>
+ correspond to the <code>Point</code>
+ versions of these functions, and they take the same arguments:
+ 
+ <pre class="example">     Point p;
+      Transform t;
+      p.shift(3, 4, 5);
+      t.shift(3, 4, 5);
+      &rArr; p.transform == t
+      p.show_transform("p:");
+      -| p:
+         Transform:
+               0   0.707   0.707       0
+          -0.866   0.354  -0.354       0
+            -0.5  -0.612   0.612       0
+               0       0       0       1
+      t.show("t:");
+      -| t:
+               0   0.707   0.707       0
+          -0.866   0.354  -0.354       0
+            -0.5  -0.612   0.612       0
+               0       0       0       1
+      
+ </pre>
+    <ul class="menu">
+ <li><a accesskey="1" href="Applying-Transforms-to-Points-Intro.html#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>
+ <li><a accesskey="2" href="Inverting-Transforms.html#Inverting-Transforms">Inverting Transforms</a>
+ </ul>
+ 
+    <div class="footnote">
+ <hr>
+ <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> It is unfortunate that
+ the terms &ldquo;array&rdquo;, &ldquo;matrix&rdquo;, and &ldquo;vector&rdquo; have different meanings
+ in C++
+  and in normal mathematical usage. However, in practice, these
+ discrepancies turn out not to cause many problems.  Stroustrup,
+ <cite>The C++
+  Programming Language</cite>, section
+  22.4, p. 662.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> In fact, none of the operations for
+ transformations require all of the elements of a
+ 4 X 4
+ matrix.  In many
+ 3D graphics programs, the matrix operations are modified to use smaller
+ transformation matrices, which reduces the storage requirements of the
+ program.  This is a bit tricky, because the affine transformations and
+ the perspective transformation use different elements of the matrix.  I
+ consider that the risk of something going wrong, possibly producing
+ hard-to-find bugs, outweighs any benefits from saving memory (which
+ is usually no longer at a premium, anyway).  In addition, there may be
+ some interesting non-affine transformations that would be worth
+ implementing.  Therefore, I've decided to
+ use full
+ 4 X 4
+ matrices in 3DLDF.</p>
+ 
+    <hr></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Constructors-and-Setting-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Constructors-and-Setting-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Constructors-and-Setting-Functions.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Constructors-and-Setting-Functions.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,76 ----
+ <html lang="en">
+ <head>
+ <title>Truncated Octahedron Constructors and Setting Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Truncated-Octahedron.html#Truncated-Octahedron" title="Truncated Octahedron">
+ <link rel="prev" href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members" title="Truncated Octahedron Data Members">
+ <link rel="next" href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net" title="Truncated Octahedron Net">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Truncated-Octahedron-Constructors-and-Setting-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net">Truncated Octahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Trunc_Octahedron</b> (<code>void</code>)<var><a name="index-Trunc_005fOctahedron-883"></a></var><br>
+ <blockquote><p>Creates an empty <code>Trunc_Octahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Trunc_Octahedron</b> (<var>const Point&amp; p, const real diameter_of_hexagon, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Trunc_005fOctahedron-884"></a></var><br>
+ <blockquote><p>This function does not yet exist! 
+ When it does, it will create a <code>Trunc_Octahedron</code> with its center
+ at the origin, where the
+ hexagonal and square faces have enclosing circles of diameter
+ <var>diameter_of_hexagon</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Trunc_Octahedron</code> will be rotated
+ by the amounts specified around the corresponding axes.  Finally,
+ if <var>p</var> is not the origin, the <code>Trunc_Octahedron</code> will be
+ shifted such that <code>center</code> comes to lie at <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Data-Members.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Data-Members.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Data-Members.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Data-Members.html	Wed Nov 13 19:06:17 2013
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*** 0 ****
--- 1,83 ----
+ <html lang="en">
+ <head>
+ <title>Truncated Octahedron Data Members - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Truncated-Octahedron.html#Truncated-Octahedron" title="Truncated Octahedron">
+ <link rel="prev" href="Truncated-Octahedron.html#Truncated-Octahedron" title="Truncated Octahedron">
+ <link rel="next" href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions" title="Truncated Octahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Truncated-Octahedron-Data-Members"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>angle_hex_square</b><var><a name="index-angle_005fhex_005fsquare-880"></a></var><br>
+ <blockquote><p>The angle between the hexagonal and the square faces of the truncated
+ octahedron, namely
+ 125 degrees
+  16'
+ . 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>angle_hex_hex</b><var><a name="index-angle_005fhex_005fhex-881"></a></var><br>
+ <blockquote><p>The angle between the hexagonal faces of the truncated
+ octahedron, namely
+ 109 degrees
+  28'
+ . 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>hexagon_radius</b><var><a name="index-hexagon_005fradius-882"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a hexagonal or square face of the
+ <code>Trunc_Octahedron</code>. 
+ </p></blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Net.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Net.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron-Net.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,73 ----
+ <html lang="en">
+ <head>
+ <title>Truncated Octahedron Net - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Truncated-Octahedron.html#Truncated-Octahedron" title="Truncated Octahedron">
+ <link rel="prev" href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions" title="Truncated Octahedron Constructors and Setting Functions">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Truncated-Octahedron-Net"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>
+ <hr>
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real hexagon_diameter, </var>[<var>bool do_half = </var><code>false</code>])<var><a name="index-get_005fnet-885"></a></var><br>
+ <blockquote><p>This function does not yet exist! 
+ When it does, it will return the <dfn>net</dfn>, i.e., the two-dimensional
+ pattern of hexagons and squares that can be folded into
+ a model of a truncated octahedron.  The net will lie in the x-z plane. 
+ The hexagons and squares will
+ have enclosing circles of diameter <var>hexagon_diameter</var>. 
+ If the argument <var>do_half</var> is <code>true</code>, only the first half of the
+ net will be created.  This will be used in the non-default constructor. 
+ See <a href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Truncated Octahedron Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <!-- utility.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Truncated-Octahedron.html	Thu Jan  1 00:00:00 1970
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*** 0 ****
--- 1,68 ----
+ <html lang="en">
+ <head>
+ <title>Truncated Octahedron - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra" title="Semi-Regular Archimedean Polyhedra">
+ <link rel="prev" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra" title="Semi-Regular Archimedean Polyhedra">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Truncated-Octahedron"></a>
+ <p>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ <hr>
+ </div>
+ 
+ <h4 class="subsection">37.3.1 Truncated Octahedron</h4>
+ 
+ <p><a name="index-Trunc_005fOctahedron-878"></a><a name="index-Truncated-Octahedron-879"></a>Class <code>Trunc_Octahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p><code>Trunc_Octahedron</code> does not yet have a functioning constructor, so
+ it cannot be used as yet.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>
+ <li><a accesskey="2" href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net">Truncated Octahedron Net</a>
+ </ul>
+ 
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Typedefs-and-Utility-Structures.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Typedefs-and-Utility-Structures.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Typedefs-and-Utility-Structures.html	Thu Jan  1 00:00:00 1970
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***************
*** 0 ****
--- 1,128 ----
+ <html lang="en">
+ <head>
+ <title>Typedefs and Utility Structures - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF" title="Installing and Running 3DLDF">
+ <link rel="next" href="Global-Constants-and-Variables.html#Global-Constants-and-Variables" title="Global Constants and Variables">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Typedefs-and-Utility-Structures"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">12 Typedefs and Utility Structures</h2>
+ 
+ <p>3DLDF defines a number of data types for various reasons, e.g., for the
+ sake of convenience, for use in conditional compilation, or as return
+ values of functions.  Some of these data types can be defined using
+ <code>typedef</code>, while others are defined as <code>structs</code>.
+ 
+    <p>The typedefs and utility structures described in this chapter are
+ found in <samp><span class="file">pspglb.web</span></samp>.  Others, that contain objects of types
+ defined in 3DLDF, are described in subsequent chapters.
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real</b><var><a name="index-real-131"></a></var><br>
+ <blockquote><p>Synonymous either with <code>float</code> or <code>double</code>, depending on the
+ values of the preprocessor variables <code>LDF_REAL_FLOAT</code> and
+ <code>LDF_REAL_DOUBLE</code>.  The meaning of <code>real</code> is determined by
+ means of conditional compilation.  If <code>real</code> is <code>float</code>, 3DLDF
+ will require less memory than if <code>real</code> is <code>double</code>, but its
+ calculations will be less precise.  <code>real</code> is &ldquo;typedeffed&rdquo; to
+ <code>float</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real_pair</b><var> first second<a name="index-real_005fpair-132"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;real, real&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>real_triple</b><var> first second third<a name="index-real_005ftriple-133"></a></var><br>
+ <blockquote><p>All three data elements of <code>real_triple</code> are <code>reals</code>. 
+ It also has two constructors, described below.  There are no other
+ member functions. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>real_triple</b> (<var>void</var>)<var><a name="index-real_005ftriple-134"></a></var><br>
+ &mdash; Constructor: void <b>real_triple</b> (<var>real a, real b, real c</var>)<var><a name="index-real_005ftriple-135"></a></var><br>
+ <blockquote><p>The constructor taking no arguments sets <code>first</code>, <code>second</code>,
+ and <code>third</code> to 0.  The constructor taking three <code>real</code>
+ arguments sets <code>first</code> to <var>a</var>, <code>second</code> to <var>b</var>, and
+ <code>third</code> to <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>Matrix</b><var><a name="index-Matrix-136"></a></var><br>
+ <blockquote><p>A <code>Matrix</code> is a 4 X 4
+  array of <code>real</code>, e.g.,
+ <code>Matrix M;</code> == <code>real M[4][4]</code>. 
+ It is used in <code>class Transform</code> for storing transformation
+ matrices.  See <a href="Transforms.html#Transforms">Transforms</a>, and See <a href="Transform-Reference.html#Transform-Reference">Transform Reference</a>, for more
+ information. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real_short</b><var> first second<a name="index-real_005fshort-137"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;real, signed short&gt;</code>. 
+ It is the return type of <code>Plane::get_distance()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_pair</b><var> first second<a name="index-bool_005fpair-138"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;bool, bool&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_real</b><var> first second<a name="index-bool_005freal-139"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;bool, real&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <!-- glbcnvar.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Using-3DLDF.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Using-3DLDF.html
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+ <html lang="en">
+ <head>
+ <title>Using 3DLDF - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Contributing-to-3DLDF.html#Contributing-to-3DLDF" title="Contributing to 3DLDF">
+ <link rel="next" href="Points.html#Points" title="Points">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Using-3DLDF"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Points.html#Points">Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Contributing-to-3DLDF.html#Contributing-to-3DLDF">Contributing to 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapheading">Using 3DLDF</h2>
+ 
+ <p>Since 3DLDF does not yet have an input routine, user code must be
+ written in C++
+  (in <samp><span class="file">main.web</span></samp>, or some other file) and compiled. 
+ Then, 3DLDF must be relinked, together with the new file of object
+ code resulting from the compilation. 
+ For now, the important point is that the text of
+ the examples in this manual represent C++
+  code. 
+ See <a href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>, for more information.
+ 
+ <!-- chapter Points -->
+ <!-- gspoint.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Utility-Functions.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Utility-Functions.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Utility-Functions.html	Thu Jan  1 00:00:00 1970
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+ <html lang="en">
+ <head>
+ <title>Utility Functions - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="prev" href="Polyhedron-Reference.html#Polyhedron-Reference" title="Polyhedron Reference">
+ <link rel="next" href="Adding-a-File.html#Adding-a-File" title="Adding a File">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Utility-Functions"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Adding-a-File.html#Adding-a-File">Adding a File</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+ <hr>
+ </div>
+ 
+ <h2 class="chapter">38 Utility Functions</h2>
+ 
+ <div class="defun">
+ &mdash; Function: double <b>trunc</b> (<var>double d</var>)<var><a name="index-trunc-886"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">pspglb.web</span></samp>. 
+ For some reason, when I compile 3DLDF using GNU CC on a PC Pentium II
+ XEON under Linux 2.4.4 i686, the standard library function
+ <code>trunc()</code> is not available.  Therefore, I've had to write one. 
+ <!-- !! TO DO: -->
+ <a name="index-kludge-887"></a>This is a kludge! 
+ Someday, I'll have to try to find a better solution to this problem. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: pair&lt;real, real&gt; <b>solve_quadratic</b> (<var>real a, real b, real c</var>)<var><a name="index-solve_005fquadratic-888"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">pspglb.web</span></samp>. 
+ This function tries to find the solutions S_0 and S_1 to the
+ quadratic equation
+ ax^2 + bx + c according to the formulae
+ S_0 == -b + sqrt(b^2 - 4ac) / 2a) and
+ S_1 == -b - sqrt( b^2 - 4ac) / 2a. 
+ Let <code>r</code> stand for the return value.  If S_0 cannot be found,
+ <code>r.first</code> will be <code>INVALID_REAL</code>, otherwise S_0. 
+ If S_1 cannot be found,
+ <code>r.second</code> will be <code>INVALID_REAL</code>, otherwise S_1.
+ 
+      <pre class="display">          (x + 4)(x + 2) = x^2 + 6x + 8 = 0
+ </pre>
+         <pre class="example">          real_pair r = solve_quadratic(1, 6, 8);
+           &rArr; r.first == -2
+           &rArr; r.second == -4
+ </pre>
+         <pre class="example">          real_pair r = solve_quadratic(1, -2, 4);
+           &rArr; r.first == INVALID_REAL
+           &rArr; r.second == INVALID_REAL
+ </pre>
+         </blockquote></div>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Perspective-Functions.html#Perspective-Functions">Perspective Functions</a>
+ </ul>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/Vector-Operations.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/Vector-Operations.html
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+ <html lang="en">
+ <head>
+ <title>Vector Operations - 3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="index.html#Top">
+ <link rel="up" href="Point-Reference.html#Point-Reference" title="Point Reference">
+ <link rel="prev" href="Projecting-Points.html#Projecting-Points" title="Projecting Points">
+ <link rel="next" href="Points-and-Lines.html#Points-and-Lines" title="Points and Lines">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled ``GNU Free Documentation License''.
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <div class="node">
+ <a name="Vector-Operations"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="Projecting-Points.html#Projecting-Points">Projecting Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <hr>
+ </div>
+ 
+ <h3 class="section">22.15 Vector Operations</h3>
+ 
+ <p>Mathematically speaking, vectors and points are not the same.  However,
+ they can both be represented as triples of real numbers (in a
+ three-dimensional Cartesian space).  It is sometimes convenient to treat
+ points as though they were vectors, and vice versa.  In particular, it
+ is convenient to use the same data type, namely <code>class Point</code>, to
+ represent both points and vectors in 3DLDF.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>dot_product</b> (<var>Point p</var>)<var><a name="index-dot_005fproduct-427"></a></var><br>
+ <blockquote><p>Returns the dot or scalar product of <code>*this</code> and <var>p</var>.
+ 
+         <p>If P and Q are <code>Points</code>,
+      <pre class="display">          P \dot Q = x_P * x_Q + y_P * y_Q + z_P * z_Q = |P||Q| * cos(\theta)
+ </pre>
+         <p>where  |P|
+ and |Q| are the magnitudes of
+ P and Q, respectively, and \theta
+ is the angle between P and Q.
+ 
+         <p>Since
+      <pre class="display">          \theta = arccos(P \dot Q / |P||Q|),
+ </pre>
+         <p>the dot product can be used for finding the angle between two vectors.
+ 
+      <pre class="example">          Point P(1, -1, -1);
+           Point Q(3, 2, 5);
+           cout &lt;&lt; P.angle(Q);
+           -| 112.002
+           cout &lt;&lt; P.dot_product(Q);
+           -| -4
+           real P_Q_angle = (180.0 / PI)
+                            * acos(P.dot_product(Q)
+                            / (P.magnitude() * Q.magnitude()));
+           cout &lt;&lt; P_Q_angle;
+           -| 112.002
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF86.png"
+ alt="[Figure 86. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 86. 
+ <br>
+ </p>
+ 
+         <p>If the angle \theta between two vectors P and Q is
+ 90 degrees
+ , then
+ \cos(\theta) is 0, so
+ P \dot Q
+ will also be 0.  Therefore,
+ <code>dot_product()</code> can be used as a test for the orthogonality of vectors.
+ 
+      <pre class="example">          Point P(2);
+           Point Q(P);
+           Point Q0(P0);
+           Q0 *= Q.rotate(0, 0, 90);
+           P *= Q.rotate(0, 45, 45);
+           P *= Q.rotate(45);
+           cout &lt;&lt; P.angle(Q);
+           -| 90
+           cout &lt;&lt; P.dot_product(Q);
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF87.png"
+ alt="[Figure 87. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 87. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>cross_product</b> (<var>Point p</var>)<var><a name="index-cross_005fproduct-428"></a></var><br>
+ <blockquote><p>Returns the cross or vector product of <code>*this</code> and <var>p</var>.
+ 
+         <p>If P and Q are <code>Points</code>,
+ 
+      <pre class="display">          P * Q = ((y_P * z_Q - z_P * y_Q), (z_P * x_Q - x_P * z_Q),
+           (x_P * y_Q - y_P * x_Q)) = |P||Q| * sin(\theta) * n,
+ </pre>
+         <p>where |P| and |Q| are the magnitudes of
+ P and Q, respectively,
+ \theta is the angle between P and Q, and n
+ is a unit vector
+ perpendicular to both P and Q in the direction of a
+ right-hand screw from P towards Q.  Therefore,
+ <code>cross_product()</code> can be used to find the normals to planes.
+ 
+      <pre class="example">          Point P(2, 2, 2);
+           Point Q(-2, 2, 2);
+           Point n = P.cross_product(Q);
+           n.show("n:");
+           -| n: (0, -8, 8)
+           real theta = (PI / 180.0) * P.angle(Q);
+           cout &lt;&lt; theta;
+           -| 1.23096
+           real n_mag = P.magnitude() * Q.magnitude() * sin(theta);
+           cout &lt;&lt; n_mag;
+           -| 11.3137
+           n /= n_mag;
+           cout &lt;&lt; n.magnitude();
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF88.png"
+ alt="[Figure 88. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 88. 
+ <br>
+ </p>
+ 
+         <p>If
+ \theta = 0 degrees or 180 degrees,
+ \sin(\theta) will be 0, and
+ P * Q
+  will be (0, 0, 0). 
+ The cross product thus provides a test for parallel vectors.
+ 
+      <pre class="example">          Point P(1, 2, 1);
+           Point Q(P);
+           Point R;
+           R *= Q.shift(-3, -1, 1);
+           Point s(Q - R);
+           Point n = P.cross_product(s);
+           n.show("n:");
+           -| n: (0, 0, 0)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF89.png"
+ alt="[Figure 89. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 89. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>magnitude</b> (<var>void</var>)<var><a name="index-magnitude-429"></a></var><br>
+ <blockquote><p>Returns the magnitude of the <code>Point</code>.  This is its distance from
+ <code>origin</code> and is equal to
+ sqrt(x^2 + y^2 + z^2).
+ 
+      <pre class="example">          Point P(13, 15.7, 22);
+           cout &lt;&lt; P.magnitude();
+           -| 29.9915
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>angle</b> (<var>Point p</var>)<var><a name="index-angle-430"></a></var><br>
+ <blockquote><p>Returns the angle in degrees between two <code>Points</code>.
+ 
+      <pre class="example">          Point P(3.75, -1.25, 6.25);
+           Point Q(-5, 2.5, 6.25);
+           real angle = P.angle(Q);
+           cout &lt;&lt; angle;
+           -| 73.9084
+           Point n = origin.get_normal(P, Q);
+           n.show("n:");
+           -| n: (0.393377, 0.91788, -0.0524503)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF90.png"
+ alt="[Figure 90. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 90. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Point <b>unit_vector</b> (<var>const bool assign, </var>[<var>const bool silent = false</var>])<var><a name="index-unit_005fvector-431"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>unit_vector</b> (<var>void</var>)<var><a name="index-unit_005fvector-432"></a></var><br>
+ <blockquote><p>These functions return a <code>Point</code> with the x, y, and z-coordinates
+ of <code>world_coordinates</code> divided by the magnitude of the <code>Point</code>. 
+ The magnitude of the resulting <code>Point</code> is thus 1.  The first
+ version assigns the result to <code>*this</code> and should only ever be
+ called with <var>assign</var> = <code>true</code>.  Calling it with the
+ argument <code>false</code> is equivalent to calling the <code>const</code> version,
+ with no assignment.  If <code>unit_vector()</code> is called with <var>assign</var>
+ and <var>silent</var> both <code>false</code>, it issues a warning message is
+ issued and the <code>const</code> version is called.  If <var>silent</var> is
+ <code>true</code>, the message is suppressed.
+ 
+      <pre class="example">          Point P(21, 45.677, 91);
+           Point Q = P.unit_vector();
+           Q.show("Q:");
+           -| Q: (0.201994, 0.439357, 0.875308)
+           P.rotate(30, 25, 10);
+           P.show("P:");
+           P: (-19.3213, 82.9627, 59.6009)
+           cout &lt;&lt; P.magnitude();
+           -| 103.963
+           P.unit_vector(true);
+           P.show("P:");
+           -| P: (-0.185847, 0.797999, 0.573287)
+           cout &lt;&lt; P.magnitude();
+           -| 1
+ </pre>
+         </blockquote></div>
+ 
+    </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/index.html 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/index.html
*** 3DLDF-2.0.2/doc/old_doc/3DLDF/3DLDF/index.html	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF/3DLDF/index.html	Wed Nov 13 19:06:17 2013
***************
*** 0 ****
--- 1,1148 ----
+ <html lang="en">
+ <head>
+ <title>3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="start" href="#Top">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled "GNU Free Documentation License".
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <h1 class="settitle">3DLDF User and Reference Manual</h1>
+ <div class="shortcontents">
+ <h2>Short Contents</h2>
+ <ul>
+ <li><a href="index.html#toc_Introduction">1 Introduction</a></li>
+ <li><a href="index.html#toc_Points">2 Points</a></li>
+ <li><a href="index.html#toc_Transforming-Points">3 Transforming Points</a></li>
+ <li><a href="index.html#toc_Transforms">4 Transforms</a></li>
+ <li><a href="index.html#toc_Drawing-and-Labeling-Points">5 Drawing and Labeling Points</a></li>
+ <li><a href="index.html#toc_Paths">6 Paths</a></li>
+ <li><a href="index.html#toc_Plane-Figures">7 Plane Figures</a></li>
+ <li><a href="index.html#toc_Solid-Figures">8 Solid Figures</a></li>
+ <li><a href="index.html#toc_Pictures">9 Pictures</a></li>
+ <li><a href="index.html#toc_Intersections">10 Intersections</a></li>
+ <li><a href="index.html#toc_Installing-and-Running-3DLDF">11 Installing and Running 3DLDF</a></li>
+ <li><a href="index.html#toc_Typedefs-and-Utility-Structures">12 Typedefs and Utility Structures</a></li>
+ <li><a href="index.html#toc_Global-Constants-and-Variables">13 Global Constants and Variables</a></li>
+ <li><a href="index.html#toc_Dynamic-Allocation-of-Shapes">14 Dynamic Allocation of Shapes</a></li>
+ <li><a href="index.html#toc_System-Information">15 System Information</a></li>
+ <li><a href="index.html#toc_Color-Reference">16 Color Reference</a></li>
+ <li><a href="index.html#toc_Input-and-Output">17 Input and Output</a></li>
+ <li><a href="index.html#toc_Shape-Reference">18 Shape Reference</a></li>
+ <li><a href="index.html#toc_Transform-Reference">19 Transform Reference</a></li>
+ <li><a href="index.html#toc_Label-Reference">20 Label Reference</a></li>
+ <li><a href="index.html#toc_Picture-Reference">21 Picture Reference</a></li>
+ <li><a href="index.html#toc_Point-Reference">22 Point Reference</a></li>
+ <li><a href="index.html#toc_Focus-Reference">23 Focus Reference</a></li>
+ <li><a href="index.html#toc_Line-Reference">24 Line Reference</a></li>
+ <li><a href="index.html#toc_Plane-Reference">25 Plane Reference</a></li>
+ <li><a href="index.html#toc_Path-Reference">26 Path Reference</a></li>
+ <li><a href="index.html#toc_Polygon-Reference">27 Polygon Reference</a></li>
+ <li><a href="index.html#toc_Regular-Polygon-Reference">28 Regular Polygon Reference</a></li>
+ <li><a href="index.html#toc_Rectangle-Reference">29 Rectangle Reference</a></li>
+ <li><a href="index.html#toc_Regular-Closed-Plane-Curve-Reference">30 Regular Closed Plane Curve Reference</a></li>
+ <li><a href="index.html#toc_Ellipse-Reference">31 Ellipse Reference</a></li>
+ <li><a href="index.html#toc_Circle-Reference">32 Circle Reference</a></li>
+ <li><a href="index.html#toc_Pattern-Reference">33 Pattern Reference</a></li>
+ <li><a href="index.html#toc_Solid-Reference">34 Solid Reference</a></li>
+ <li><a href="index.html#toc_Faced-Solid-Reference">35 Faced Solid Reference</a></li>
+ <li><a href="index.html#toc_Cuboid-Reference">36 Cuboid Reference</a></li>
+ <li><a href="index.html#toc_Polyhedron-Reference">37 Polyhedron Reference</a></li>
+ <li><a href="index.html#toc_Utility-Functions">38 Utility Functions</a></li>
+ <li><a href="index.html#toc_Adding-a-File">39 Adding a File</a></li>
+ <li><a href="index.html#toc_Future-Plans">40 Future Plans</a></li>
+ <li><a href="index.html#toc_Changes">41 Changes</a></li>
+ <li><a href="index.html#toc_Bibliography">Bibliography</a></li>
+ <li><a href="index.html#toc_GNU-Free-Documentation-License">Appendix A GNU Free Documentation License</a></li>
+ <li><a href="index.html#toc_Data-Type-and-Variable-Index">Data Type and Variable Index</a></li>
+ <li><a href="index.html#toc_Function-Index">Function Index</a></li>
+ <li><a href="index.html#toc_Concept-Index">Concept Index</a></li>
+ </ul>
+ </div>
+ 
+ 
+ 
+    <div class="contents">
+ <h2>Table of Contents</h2>
+ <ul>
+ <li><a name="toc_Introduction" href="Introduction.html#Introduction">1 Introduction</a>
+ <ul>
+ <li><a href="Sources-of-Information.html#Sources-of-Information">1.1 Sources of Information</a>
+ <li><a href="About-This-Manual.html#About-This-Manual">1.2 About This Manual</a>
+ <ul>
+ <li><a href="Manual-Conventions.html#Manual-Conventions">1.2.1 Conventions</a>
+ <li><a href="Illustrations.html#Illustrations">1.2.2 Illustrations</a>
+ </li></ul>
+ <li><a href="CWEB-Documentation.html#CWEB-Documentation">1.3 CWEB Documentation</a>
+ <li><a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">1.4 Metafont and MetaPost</a>
+ <li><a href="Caveats.html#Caveats">1.5 Caveats</a>
+ <ul>
+ <li><a href="Accuracy.html#Accuracy">1.5.1 Accuracy</a>
+ <li><a href="No-Input-Routine.html#No-Input-Routine">1.5.2 No Input Routine</a>
+ </li></ul>
+ <li><a href="Ports.html#Ports">1.6 Ports</a>
+ <li><a href="Contributing-to-3DLDF.html#Contributing-to-3DLDF">1.7 Contributing to 3DLDF</a>
+ </li></ul>
+ <li><a name="toc_Points" href="Points.html#Points">2 Points</a>
+ <ul>
+ <li><a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">2.1 Declaring and Initializing Points</a>
+ <li><a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">2.2 Setting and Assigning to Points</a>
+ </li></ul>
+ <li><a name="toc_Transforming-Points" href="Transforming-Points.html#Transforming-Points">3 Transforming Points</a>
+ <ul>
+ <li><a href="Shifting-Points.html#Shifting-Points">3.1 Shifting</a>
+ <li><a href="Scaling-Points.html#Scaling-Points">3.2 Scaling</a>
+ <li><a href="Shearing-Points.html#Shearing-Points">3.3 Shearing</a>
+ <li><a href="Rotating-Points.html#Rotating-Points">3.4 Rotating</a>
+ </li></ul>
+ <li><a name="toc_Transforms" href="Transforms.html#Transforms">4 Transforms</a>
+ <ul>
+ <li><a href="Applying-Transforms-to-Points-Intro.html#Applying-Transforms-to-Points-Intro">4.1 Applying Transforms to Points</a>
+ <li><a href="Inverting-Transforms.html#Inverting-Transforms">4.2 Inverting Transforms</a>
+ </li></ul>
+ <li><a name="toc_Drawing-and-Labeling-Points" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">5 Drawing and Labeling Points</a>
+ <ul>
+ <li><a href="Drawing-Points-Intro.html#Drawing-Points-Intro">5.1 Drawing Points</a>
+ <li><a href="Labeling-Points-Intro.html#Labeling-Points-Intro">5.2 Labeling Points</a>
+ </li></ul>
+ <li><a name="toc_Paths" href="Paths.html#Paths">6 Paths</a>
+ <ul>
+ <li><a href="Declaring-and-Initializing-Paths.html#Declaring-and-Initializing-Paths">6.1 Declaring and Initializing Paths</a>
+ <li><a href="Drawing-and-Filling-Paths-Intro.html#Drawing-and-Filling-Paths-Intro">6.2 Drawing and Filling Paths</a>
+ </li></ul>
+ <li><a name="toc_Plane-Figures" href="Plane-Figures.html#Plane-Figures">7 Plane Figures</a>
+ <ul>
+ <li><a href="Regular-Polygons-Getstart.html#Regular-Polygons-Getstart">7.1 Regular Polygons</a>
+ <li><a href="Rectangles-Getstart.html#Rectangles-Getstart">7.2 Rectangles</a>
+ <li><a href="Ellipses-Getstart.html#Ellipses-Getstart">7.3 Ellipses</a>
+ <li><a href="Circles-Getstart.html#Circles-Getstart">7.4 Circles</a>
+ </li></ul>
+ <li><a name="toc_Solid-Figures" href="Solid-Figures.html#Solid-Figures">8 Solid Figures</a>
+ <ul>
+ <li><a href="Cuboid-Getstart.html#Cuboid-Getstart">8.1 Cuboids</a>
+ <li><a href="Polyhedron-Getstart.html#Polyhedron-Getstart">8.2 Polyhedron</a>
+ <ul>
+ <li><a href="Tetrahedron-Getstart.html#Tetrahedron-Getstart">8.2.1 Tetrahedron</a>
+ <li><a href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">8.2.2 Dodecahedron</a>
+ <li><a href="Icosahedron-Getstart.html#Icosahedron-Getstart">8.2.3 Icosahedron</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Pictures" href="Pictures.html#Pictures">9 Pictures</a>
+ <ul>
+ <li><a href="Projections.html#Projections">9.1 Projections</a>
+ <ul>
+ <li><a href="Parallel-Projections.html#Parallel-Projections">9.1.1 Parallel Projections</a>
+ <li><a href="The-Perspective-Projection.html#The-Perspective-Projection">9.1.2 The Perspective Projection</a>
+ </li></ul>
+ <li><a href="Focuses-Getstart.html#Focuses-Getstart">9.2 Focuses</a>
+ <li><a href="Surface-Hiding.html#Surface-Hiding">9.3 Surface Hiding</a>
+ </li></ul>
+ <li><a name="toc_Intersections" href="Intersections.html#Intersections">10 Intersections</a>
+ <li><a name="toc_Installing-and-Running-3DLDF" href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">11 Installing and Running 3DLDF</a>
+ <ul>
+ <li><a href="Installing-3DLDF.html#Installing-3DLDF">11.1 Installing 3DLDF</a>
+ <ul>
+ <li><a href="Template-Functions.html#Template-Functions">11.1.1 Template Functions</a>
+ </li></ul>
+ <li><a href="Running-3DLDF.html#Running-3DLDF">11.2 Running 3DLDF</a>
+ <ul>
+ <li><a href="Converting-EPS-Files.html#Converting-EPS-Files">11.2.1 Converting EPS Files</a>
+ <ul>
+ <li><a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">11.2.1.1 Emacs-Lisp Functions</a>
+ </li></ul>
+ <li><a href="Command-Line-Arguments.html#Command-Line-Arguments">11.2.2 Command Line Arguments</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Typedefs-and-Utility-Structures" href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">12 Typedefs and Utility Structures</a>
+ <li><a name="toc_Global-Constants-and-Variables" href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">13 Global Constants and Variables</a>
+ <li><a name="toc_Dynamic-Allocation-of-Shapes" href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">14 Dynamic Allocation of Shapes</a>
+ <li><a name="toc_System-Information" href="System-Information.html#System-Information">15 System Information</a>
+ <ul>
+ <li><a href="Endianness.html#Endianness">15.1 Endianness</a>
+ <li><a href="Register-Width.html#Register-Width">15.2 Register Width</a>
+ <li><a href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">15.3 Get Second Largest Real</a>
+ </li></ul>
+ <li><a name="toc_Color-Reference" href="Color-Reference.html#Color-Reference">16 Color Reference</a>
+ <ul>
+ <li><a href="Color-Data-Members.html#Color-Data-Members">16.1 Data Members</a>
+ <li><a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">16.2 Constructors and Setting Functions</a>
+ <li><a href="Color-Operators.html#Color-Operators">16.3 Operators</a>
+ <li><a href="Modifying-Colors.html#Modifying-Colors">16.4 Modifying</a>
+ <li><a href="Showing-Colors.html#Showing-Colors">16.5 Showing</a>
+ <li><a href="Querying-Colors.html#Querying-Colors">16.6 Querying</a>
+ <li><a href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">16.7 Defining and Initializing Colors</a>
+ <li><a href="Namespace-Colors.html#Namespace-Colors">16.8 Namespace Colors.</a>
+ </li></ul>
+ <li><a name="toc_Input-and-Output" href="Input-and-Output.html#Input-and-Output">17 Input and Output</a>
+ <ul>
+ <li><a href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">17.1 Global Variables</a>
+ <li><a href="I_002fO-Functions.html#I_002fO-Functions">17.2 I/O Functions</a>
+ </li></ul>
+ <li><a name="toc_Shape-Reference" href="Shape-Reference.html#Shape-Reference">18 Shape Reference</a>
+ <ul>
+ <li><a href="Shape-Data-Members.html#Shape-Data-Members">18.1 Data Members</a>
+ <li><a href="Shape-Operators.html#Shape-Operators">18.2 Operators</a>
+ <li><a href="Copying-Shapes.html#Copying-Shapes">18.3 Copying</a>
+ <li><a href="Modifying-Shapes.html#Modifying-Shapes">18.4 Modifying</a>
+ <li><a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">18.5 Affine Transformations</a>
+ <li><a href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">18.6 Applying Transformations</a>
+ <li><a href="Clearing-Shapes.html#Clearing-Shapes">18.7 Clearing</a>
+ <li><a href="Querying-Shapes.html#Querying-Shapes">18.8 Querying</a>
+ <li><a href="Showing-Shapes.html#Showing-Shapes">18.9 Showing</a>
+ <li><a href="Outputting-Shapes.html#Outputting-Shapes">18.10 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Transform-Reference" href="Transform-Reference.html#Transform-Reference">19 Transform Reference</a>
+ <ul>
+ <li><a href="Transform-Data-Members.html#Transform-Data-Members">19.1 Data Members</a>
+ <li><a href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">19.2 Global Variables and Constants</a>
+ <li><a href="Transform-Constructors.html#Transform-Constructors">19.3 Constructors</a>
+ <li><a href="Transform-Operators.html#Transform-Operators">19.4 Operators</a>
+ <li><a href="Matrix-Inversion.html#Matrix-Inversion">19.5 Matrix Inversion</a>
+ <li><a href="Setting-Values-Transforms.html#Setting-Values-Transforms">19.6 Setting Values</a>
+ <li><a href="Querying-Transforms.html#Querying-Transforms">19.7 Querying</a>
+ <li><a href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">19.8 Returning Information</a>
+ <li><a href="Showing-Transforms.html#Showing-Transforms">19.9 Showing</a>
+ <li><a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">19.10 Affine Transformations</a>
+ <li><a href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">19.11 Alignment with an Axis</a>
+ <li><a href="Resetting-Transforms.html#Resetting-Transforms">19.12 Resetting</a>
+ <li><a href="Cleaning-Transforms.html#Cleaning-Transforms">19.13 Cleaning</a>
+ </li></ul>
+ <li><a name="toc_Label-Reference" href="Label-Reference.html#Label-Reference">20 Label Reference</a>
+ <ul>
+ <li><a href="Label-Data-Members.html#Label-Data-Members">20.1 Data Members</a>
+ <li><a href="Copying-Labels.html#Copying-Labels">20.2 Copying</a>
+ <li><a href="Outputting-Labels.html#Outputting-Labels">20.3 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Picture-Reference" href="Picture-Reference.html#Picture-Reference">21 Picture Reference</a>
+ <ul>
+ <li><a href="Picture-Data-Members.html#Picture-Data-Members">21.1 Data Members</a>
+ <li><a href="Picture-Global-Variables.html#Picture-Global-Variables">21.2 Global Variables</a>
+ <li><a href="Picture-Constructors.html#Picture-Constructors">21.3 Constructors</a>
+ <li><a href="Picture-Operators.html#Picture-Operators">21.4 Operators</a>
+ <li><a href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">21.5 Affine Transformations</a>
+ <li><a href="Modifying-Pictures.html#Modifying-Pictures">21.6 Modifying</a>
+ <li><a href="Showing-Pictures.html#Showing-Pictures">21.7 Showing</a>
+ <li><a href="Outputting-Pictures.html#Outputting-Pictures">21.8 Outputting</a>
+ <ul>
+ <li><a href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">21.8.1 Namespaces</a>
+ <ul>
+ <li><a href="Namespace-Projections.html#Namespace-Projections">21.8.1.1 Namespace Projections</a>
+ <li><a href="Namespace-Sorting.html#Namespace-Sorting">21.8.1.2 Namespace Sorting</a>
+ </li></ul>
+ <li><a href="Picture-Output-Functions.html#Picture-Output-Functions">21.8.2 Output Functions</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Point-Reference" href="Point-Reference.html#Point-Reference">22 Point Reference</a>
+ <ul>
+ <li><a href="Point-Data-Members.html#Point-Data-Members">22.1 Data Members</a>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">22.2 Typedefs and Utility Structures</a>
+ <li><a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">22.3 Global Constants and Variables</a>
+ <li><a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">22.4 Constructors and Setting Functions</a>
+ <li><a href="Point-Destructor.html#Point-Destructor">22.5 Destructor</a>
+ <li><a href="Point-Operators.html#Point-Operators">22.6 Operators</a>
+ <li><a href="Copying-Points.html#Copying-Points">22.7 Copying</a>
+ <li><a href="Querying-Points.html#Querying-Points">22.8 Querying</a>
+ <li><a href="Returning-Coordinates.html#Returning-Coordinates">22.9 Returning Coordinates</a>
+ <li><a href="Returning-Information-for-Points.html#Returning-Information-for-Points">22.10 Returning Information</a>
+ <li><a href="Modifying-Points.html#Modifying-Points">22.11 Modifying</a>
+ <li><a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">22.12 Affine Transformations</a>
+ <li><a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">22.13 Applying Transformations</a>
+ <li><a href="Projecting-Points.html#Projecting-Points">22.14 Projecting</a>
+ <li><a href="Vector-Operations.html#Vector-Operations">22.15 Vector Operations</a>
+ <li><a href="Points-and-Lines.html#Points-and-Lines">22.16 Points and Lines</a>
+ <li><a href="Point-Intersections.html#Point-Intersections">22.17 Intersections</a>
+ <li><a href="Point-Drawing-Functions.html#Point-Drawing-Functions">22.18 Drawing</a>
+ <li><a href="Labelling-Points.html#Labelling-Points">22.19 Labelling</a>
+ <li><a href="Showing-Points.html#Showing-Points">22.20 Showing</a>
+ <li><a href="Outputting-Points.html#Outputting-Points">22.21 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Focus-Reference" href="Focus-Reference.html#Focus-Reference">23 Focus Reference</a>
+ <ul>
+ <li><a href="Focus-Data-Members.html#Focus-Data-Members">23.1 Data Members</a>
+ <li><a href="Focus-Global-Variables.html#Focus-Global-Variables">23.2 Global Variables</a>
+ <li><a href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">23.3 Constructors and Setting Functions</a>
+ <li><a href="Focus-Operators.html#Focus-Operators">23.4 Operators</a>
+ <li><a href="Modifying-Focuses.html#Modifying-Focuses">23.5 Modifying</a>
+ <li><a href="Querying-Focuses.html#Querying-Focuses">23.6 Querying</a>
+ <li><a href="Showing-Focuses.html#Showing-Focuses">23.7 Showing</a>
+ </li></ul>
+ <li><a name="toc_Line-Reference" href="Line-Reference.html#Line-Reference">24 Line Reference</a>
+ <ul>
+ <li><a href="Line-Data-Members.html#Line-Data-Members">24.1 Data Members</a>
+ <li><a href="Line-Global-Constants.html#Line-Global-Constants">24.2 Global Constants</a>
+ <li><a href="Line-Constructors.html#Line-Constructors">24.3 Constructors</a>
+ <li><a href="Line-Operators.html#Line-Operators">24.4 Operators</a>
+ <li><a href="Get-Path.html#Get-Path">24.5 Get Path</a>
+ <li><a href="Showing.html#Showing">24.6 Showing</a>
+ </li></ul>
+ <li><a name="toc_Plane-Reference" href="Plane-Reference.html#Plane-Reference">25 Plane Reference</a>
+ <ul>
+ <li><a href="Planes-Data-Members.html#Planes-Data-Members">25.1 Data Members</a>
+ <li><a href="Planes-Global-Constants.html#Planes-Global-Constants">25.2 Global Constants</a>
+ <li><a href="Planes-Constructors.html#Planes-Constructors">25.3 Constructors</a>
+ <li><a href="Planes-Operators.html#Planes-Operators">25.4 Operators</a>
+ <li><a href="Planes-Returning-Information.html#Planes-Returning-Information">25.5 Returning Information</a>
+ <li><a href="Plane-Intersections.html#Plane-Intersections">25.6 Intersections</a>
+ <li><a href="Planes-Showing.html#Planes-Showing">25.7 Showing</a>
+ </li></ul>
+ <li><a name="toc_Path-Reference" href="Path-Reference.html#Path-Reference">26 Path Reference</a>
+ <ul>
+ <li><a href="Path-Data-Members.html#Path-Data-Members">26.1 Data Members</a>
+ <li><a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">26.2 Constructors and Setting Functions</a>
+ <li><a href="Path-Destructor.html#Path-Destructor">26.3 Destructor</a>
+ <li><a href="Path-Operators.html#Path-Operators">26.4 Operators</a>
+ <li><a href="Appending-to-Paths.html#Appending-to-Paths">26.5 Appending</a>
+ <li><a href="Copying-Paths.html#Copying-Paths">26.6 Copying</a>
+ <li><a href="Clearing-Paths.html#Clearing-Paths">26.7 Clearing</a>
+ <li><a href="Modifying-Paths.html#Modifying-Paths">26.8 Modifying</a>
+ <li><a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">26.9 Affine Transformations</a>
+ <li><a href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">26.10 Aligning with an Axis</a>
+ <li><a href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">26.11 Applying Transformations</a>
+ <li><a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">26.12 Drawing and Filling</a>
+ <li><a href="Labelling-Paths.html#Labelling-Paths">26.13 Labelling</a>
+ <li><a href="Showing-Paths.html#Showing-Paths">26.14 Showing</a>
+ <li><a href="Querying-Paths.html#Querying-Paths">26.15 Querying</a>
+ <li><a href="Outputting-Paths.html#Outputting-Paths">26.16 Outputting</a>
+ <li><a href="Path-Intersections.html#Path-Intersections">26.17 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Polygon-Reference" href="Polygon-Reference.html#Polygon-Reference">27 Polygon Reference</a>
+ <ul>
+ <li><a href="Polygon-Data-Members.html#Polygon-Data-Members">27.1 Data Members</a>
+ <li><a href="Polygon-Operators.html#Polygon-Operators">27.2 Operators</a>
+ <li><a href="Querying-Polygons.html#Querying-Polygons">27.3 Querying</a>
+ <li><a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">27.4 Affine Transformations</a>
+ <li><a href="Polygon-Intersections.html#Polygon-Intersections">27.5 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Regular-Polygon-Reference" href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">28 Regular Polygon Reference</a>
+ <ul>
+ <li><a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">28.1 Data Members</a>
+ <li><a href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">28.2 Constructors and Setting Functions</a>
+ <li><a href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">28.3 Operators</a>
+ <li><a href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">28.4 Querying</a>
+ <li><a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">28.5 Circles</a>
+ </li></ul>
+ <li><a name="toc_Rectangle-Reference" href="Rectangle-Reference.html#Rectangle-Reference">29 Rectangle Reference</a>
+ <ul>
+ <li><a href="Rectangle-Data-Members.html#Rectangle-Data-Members">29.1 Data Members</a>
+ <li><a href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">29.2 Constructors and Setting Functions</a>
+ <li><a href="Rectangle-Operators.html#Rectangle-Operators">29.3 Operators</a>
+ <li><a href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">29.4 Returning Points</a>
+ <li><a href="Querying-Rectangles.html#Querying-Rectangles">29.5 Querying</a>
+ <li><a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">29.6 Ellipses</a>
+ </li></ul>
+ <li><a name="toc_Regular-Closed-Plane-Curve-Reference" href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">30 Regular Closed Plane Curve Reference</a>
+ <ul>
+ <li><a href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">30.1 Data Members</a>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">30.2 Querying</a>
+ <li><a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">30.3 Intersections</a>
+ <li><a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">30.4 Segments</a>
+ </li></ul>
+ <li><a name="toc_Ellipse-Reference" href="Ellipse-Reference.html#Ellipse-Reference">31 Ellipse Reference</a>
+ <ul>
+ <li><a href="Ellipse-Data-Members.html#Ellipse-Data-Members">31.1 Data Members</a>
+ <li><a href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">31.2 Constructors and Setting Functions</a>
+ <li><a href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">31.3 Performing Transformations</a>
+ <li><a href="Ellipse-Operators.html#Ellipse-Operators">31.4 Operators</a>
+ <li><a href="Labeling-Ellipses.html#Labeling-Ellipses">31.5 Labeling</a>
+ <li><a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">31.6 Affine Transformations</a>
+ <li><a href="Querying-Ellipses.html#Querying-Ellipses">31.7 Querying</a>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">31.8 Returning Elements and Information</a>
+ <li><a href="Ellipse-Intersections.html#Ellipse-Intersections">31.9 Intersections</a>
+ <li><a href="Solving-Ellipses.html#Solving-Ellipses">31.10 Solving</a>
+ <li><a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">31.11 Rectangles</a>
+ </li></ul>
+ <li><a name="toc_Circle-Reference" href="Circle-Reference.html#Circle-Reference">32 Circle Reference</a>
+ <ul>
+ <li><a href="Circle-Data-Members.html#Circle-Data-Members">32.1 Data Members</a>
+ <li><a href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">32.2 Constructors and Setting Functions</a>
+ <li><a href="Circle-Operators.html#Circle-Operators">32.3 Operators</a>
+ <li><a href="Querying-Circles.html#Querying-Circles">32.4 Querying</a>
+ <li><a href="Circle-Intersections.html#Circle-Intersections">32.5 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Pattern-Reference" href="Pattern-Reference.html#Pattern-Reference">33 Pattern Reference</a>
+ <ul>
+ <li><a href="Plane-Tesselations.html#Plane-Tesselations">33.1 Plane Tesselations</a>
+ <li><a href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">33.2 Roulettes and Involutes</a>
+ <ul>
+ <li><a href="Epicycloids.html#Epicycloids">33.2.1 Epicycloids</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Solid-Reference" href="Solid-Reference.html#Solid-Reference">34 Solid Reference</a>
+ <ul>
+ <li><a href="Solid-Data-Members.html#Solid-Data-Members">34.1 Data Members</a>
+ <li><a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">34.2 Constructors and Setting Functions</a>
+ <li><a href="Solid-Destructor.html#Solid-Destructor">34.3 Destructor</a>
+ <li><a href="Solid-Operators.html#Solid-Operators">34.4 Operators</a>
+ <li><a href="Copying-Solids.html#Copying-Solids">34.5 Copying</a>
+ <li><a href="Setting-Solid-Members.html#Setting-Solid-Members">34.6 Setting Members</a>
+ <li><a href="Querying-Solids.html#Querying-Solids">34.7 Querying</a>
+ <li><a href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">34.8 Returning Elements and Information</a>
+ <ul>
+ <li><a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers</a>
+ <li><a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes</a>
+ </li></ul>
+ <li><a href="Showing-Solids.html#Showing-Solids">34.9 Showing</a>
+ <li><a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">34.10 Affine Transformations</a>
+ <li><a href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">34.11 Applying Transformations</a>
+ <li><a href="Outputting-Solids.html#Outputting-Solids">34.12 Outputting</a>
+ <li><a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">34.13 Drawing and Filling</a>
+ <li><a href="Clearing-Solids.html#Clearing-Solids">34.14 Clearing</a>
+ </li></ul>
+ <li><a name="toc_Faced-Solid-Reference" href="Faced-Solid-Reference.html#Faced-Solid-Reference">35 Faced Solid Reference</a>
+ <ul>
+ <li><a href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">35.1 Data Members</a>
+ </li></ul>
+ <li><a name="toc_Cuboid-Reference" href="Cuboid-Reference.html#Cuboid-Reference">36 Cuboid Reference</a>
+ <ul>
+ <li><a href="Cuboid-Data-Members.html#Cuboid-Data-Members">36.1 Data Members</a>
+ <li><a href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">36.2 Constructors and Setting Functions</a>
+ <li><a href="Cuboid-Operators.html#Cuboid-Operators">36.3 Operators</a>
+ </li></ul>
+ <li><a name="toc_Polyhedron-Reference" href="Polyhedron-Reference.html#Polyhedron-Reference">37 Polyhedron Reference</a>
+ <ul>
+ <li><a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">37.1 Data Members</a>
+ <li><a href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">37.2 Regular Platonic Polyhedra</a>
+ <ul>
+ <li><a href="Tetrahedron.html#Tetrahedron">37.2.1 Tetrahedron</a>
+ <ul>
+ <li><a href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">37.2.1.1 Data Members</a>
+ <li><a href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">37.2.1.2 Constructors and Setting Functions</a>
+ <li><a href="Tetrahedron-Net.html#Tetrahedron-Net">37.2.1.3 Net</a>
+ </li></ul>
+ <li><a href="Dodecahedron.html#Dodecahedron">37.2.2 Dodecahedron</a>
+ <ul>
+ <li><a href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">37.2.2.1 Data Members</a>
+ <li><a href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">37.2.2.2 Constructors and Setting Functions</a>
+ <li><a href="Dodecahedron-Net.html#Dodecahedron-Net">37.2.2.3 Net</a>
+ </li></ul>
+ <li><a href="Icosahedron.html#Icosahedron">37.2.3 Icosahedron</a>
+ <ul>
+ <li><a href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">37.2.3.1 Data Members</a>
+ <li><a href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">37.2.3.2 Constructors and Setting Functions</a>
+ <li><a href="Icosahedron-Net.html#Icosahedron-Net">37.2.3.3 Net</a>
+ </li></ul>
+ </li></ul>
+ <li><a href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">37.3 Semi-Regular Archimedean Polyhedra</a>
+ <ul>
+ <li><a href="Truncated-Octahedron.html#Truncated-Octahedron">37.3.1 Truncated Octahedron</a>
+ <ul>
+ <li><a href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">37.3.1.1 Data Members</a>
+ <li><a href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">37.3.1.2 Constructors and Setting Functions</a>
+ <li><a href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net">37.3.1.3 Net</a>
+ </li></ul>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Utility-Functions" href="Utility-Functions.html#Utility-Functions">38 Utility Functions</a>
+ <ul>
+ <li><a href="Perspective-Functions.html#Perspective-Functions">38.1 Perspective Functions</a>
+ </li></ul>
+ <li><a name="toc_Adding-a-File" href="Adding-a-File.html#Adding-a-File">39 Adding a File</a>
+ <li><a name="toc_Future-Plans" href="Future-Plans.html#Future-Plans">40 Future Plans</a>
+ <ul>
+ <li><a href="Geometry.html#Geometry">40.1 Geometry</a>
+ <li><a href="Curves-and-Surfaces.html#Curves-and-Surfaces">40.2 Curves and Surfaces</a>
+ <li><a href="Shadows.html#Shadows">40.3 Shadows, Reflections, and Rendering</a>
+ <li><a href="Multi_002dThreading.html#Multi_002dThreading">40.4 Multi-Threading</a>
+ </li></ul>
+ <li><a name="toc_Changes" href="Changes.html#Changes">41 Changes</a>
+ <ul>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">41.1 3DLDF 1.1.5.1</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5">41.2 3DLDF 1.1.5</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2">41.3 3DLDF 1.1.4.2</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1">41.4 3DLDF 1.1.4.1</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4">41.5 3DLDF 1.1.4</a>
+ <li><a href="Initial-version.html#Initial-version">41.6 3DLDF 1.1.1</a>
+ </li></ul>
+ <li><a name="toc_Bibliography" href="Bibliography.html#Bibliography">Bibliography</a>
+ <li><a name="toc_GNU-Free-Documentation-License" href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License">Appendix A GNU Free Documentation License</a>
+ <li><a name="toc_Data-Type-and-Variable-Index" href="Data-Type-and-Variable-Index.html#Data-Type-and-Variable-Index">Data Type and Variable Index</a>
+ <li><a name="toc_Function-Index" href="Function-Index.html#Function-Index">Function Index</a>
+ <li><a name="toc_Concept-Index" href="Concept-Index.html#Concept-Index">Concept Index</a>
+ </li></ul>
+ </div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Top"></a>
+ <p>
+ Next:&nbsp;<a rel="next" accesskey="n" href="Introduction.html#Introduction">Introduction</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="../index.html#dir">(dir)</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="../index.html#dir">(dir)</a>
+ <hr>
+ </div>
+ 
+    <p>This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.<br>  This manual was last updated on
+ 16 January 2004.<br>
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output. 
+ The author is Laurence D. Finston.
+ 
+    <p>Copyright &copy; 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+    <blockquote>
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.2
+ or any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+ Texts.  A copy of the license is included in the section entitled
+ &ldquo;GNU Free Documentation License&rdquo;. 
+ </blockquote>
+ 
+    <p>Please note that the figures cannot be shown in the Info output
+ format.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="Introduction.html#Introduction">Introduction</a>
+ <li><a accesskey="2" href="Contributing-to-3DLDF.html#Contributing-to-3DLDF">Contributing to 3DLDF</a>
+ <li><a accesskey="3" href="Using-3DLDF.html#Using-3DLDF">Using 3DLDF</a>
+ <li><a accesskey="4" href="Points.html#Points">Points</a>
+ <li><a accesskey="5" href="Transforming-Points.html#Transforming-Points">Transforming Points</a>
+ <li><a accesskey="6" href="Transforms.html#Transforms">Transforms</a>
+ <li><a accesskey="7" href="Drawing-and-Labeling-Points.html#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ <li><a accesskey="8" href="Paths.html#Paths">Paths</a>
+ <li><a accesskey="9" href="Plane-Figures.html#Plane-Figures">Plane Figures</a>
+ <li><a href="Solid-Figures.html#Solid-Figures">Solid Figures</a>
+ <li><a href="Pictures.html#Pictures">Pictures</a>
+ <li><a href="Intersections.html#Intersections">Intersections</a>
+ <li><a href="Installing-and-Running-3DLDF.html#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ <li><a href="Typedefs-and-Utility-Structures.html#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>
+ <li><a href="Global-Constants-and-Variables.html#Global-Constants-and-Variables">Global Constants and Variables</a>
+ <li><a href="Dynamic-Allocation-of-Shapes.html#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>
+ <li><a href="System-Information.html#System-Information">System Information</a>
+ <li><a href="Color-Reference.html#Color-Reference">Color Reference</a>
+ <li><a href="Input-and-Output.html#Input-and-Output">Input and Output</a>
+ <li><a href="Shape-Reference.html#Shape-Reference">Shape Reference</a>
+ <li><a href="Transform-Reference.html#Transform-Reference">Transform Reference</a>
+ <li><a href="Label-Reference.html#Label-Reference">Label Reference</a>
+ <li><a href="Picture-Reference.html#Picture-Reference">Picture Reference</a>
+ <li><a href="Point-Reference.html#Point-Reference">Point Reference</a>
+ <li><a href="Focus-Reference.html#Focus-Reference">Focus Reference</a>
+ <li><a href="Line-Reference.html#Line-Reference">Line Reference</a>
+ <li><a href="Plane-Reference.html#Plane-Reference">Plane Reference</a>
+ <li><a href="Path-Reference.html#Path-Reference">Path Reference</a>
+ <li><a href="Polygon-Reference.html#Polygon-Reference">Polygon Reference</a>
+ <li><a href="Regular-Polygon-Reference.html#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <li><a href="Rectangle-Reference.html#Rectangle-Reference">Rectangle Reference</a>
+ <li><a href="Regular-Closed-Plane-Curve-Reference.html#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <li><a href="Ellipse-Reference.html#Ellipse-Reference">Ellipse Reference</a>
+ <li><a href="Circle-Reference.html#Circle-Reference">Circle Reference</a>
+ <li><a href="Pattern-Reference.html#Pattern-Reference">Pattern Reference</a>
+ <li><a href="Solid-Reference.html#Solid-Reference">Solid Reference</a>
+ <li><a href="Faced-Solid-Reference.html#Faced-Solid-Reference">Faced Solid Reference</a>
+ <li><a href="Cuboid-Reference.html#Cuboid-Reference">Cuboid Reference</a>
+ <li><a href="Polyhedron-Reference.html#Polyhedron-Reference">Polyhedron Reference</a>
+ <li><a href="Utility-Functions.html#Utility-Functions">Utility Functions</a>
+ <li><a href="Adding-a-File.html#Adding-a-File">Adding a File</a>
+ <li><a href="Future-Plans.html#Future-Plans">Future Plans</a>
+ <li><a href="Changes.html#Changes">Changes</a>
+ <li><a href="Bibliography.html#Bibliography">Bibliography</a>
+ <li><a href="GNU-Free-Documentation-License.html#GNU-Free-Documentation-License">GNU Free Documentation License</a>
+ <li><a href="Data-Type-and-Variable-Index.html#Data-Type-and-Variable-Index">Data Type and Variable Index</a>
+ <li><a href="Function-Index.html#Function-Index">Function Index</a>
+ <li><a href="Concept-Index.html#Concept-Index">Concept Index</a>
+ 
+ </li></ul>
+ <p>Introduction
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Sources-of-Information.html#Sources-of-Information">Sources of Information</a>
+ <li><a href="About-This-Manual.html#About-This-Manual">About This Manual</a>
+ <li><a href="CWEB-Documentation.html#CWEB-Documentation">CWEB Documentation</a>
+ <li><a href="Metafont-and-MetaPost.html#Metafont-and-MetaPost">Metafont and MetaPost</a>
+ <li><a href="Caveats.html#Caveats">Caveats</a>
+ <li><a href="Ports.html#Ports">Ports</a>
+ 
+ </li></ul>
+ <p>About This Manual
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Manual-Conventions.html#Manual-Conventions">Manual Conventions</a>
+ <li><a href="Illustrations.html#Illustrations">Illustrations</a>
+ 
+ </li></ul>
+ <p>Caveats
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Accuracy.html#Accuracy">Accuracy</a>
+ <li><a href="No-Input-Routine.html#No-Input-Routine">No Input Routine</a>
+ 
+ </li></ul>
+ <p>Points
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Declaring-and-Initializing-Points.html#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>
+ <li><a href="Setting-and-Assigning-to-Points.html#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>
+ <li><a href="Shifting-Points.html#Shifting-Points">Shifting Points</a>
+ <li><a href="Scaling-Points.html#Scaling-Points">Scaling Points</a>
+ <li><a href="Shearing-Points.html#Shearing-Points">Shearing Points</a>
+ <li><a href="Rotating-Points.html#Rotating-Points">Rotating Points</a>
+ 
+ </li></ul>
+ <p>Transforms
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Applying-Transforms-to-Points-Intro.html#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>
+ <li><a href="Inverting-Transforms.html#Inverting-Transforms">Inverting Transforms</a>
+ 
+ </li></ul>
+ <p>Drawing and Labeling Points
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Drawing-Points-Intro.html#Drawing-Points-Intro">Drawing Points Intro</a>
+ <li><a href="Labeling-Points-Intro.html#Labeling-Points-Intro">Labeling Points Intro</a>
+ 
+ </li></ul>
+ <p>Paths
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Declaring-and-Initializing-Paths.html#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>
+ <li><a href="Drawing-and-Filling-Paths-Intro.html#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>
+ 
+ </li></ul>
+ <p>Plane Figures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Regular-Polygons-Getstart.html#Regular-Polygons-Getstart">Regular Polygons Getstart</a>
+ <li><a href="Rectangles-Getstart.html#Rectangles-Getstart">Rectangles Getstart</a>
+ <li><a href="Ellipses-Getstart.html#Ellipses-Getstart">Ellipses Getstart</a>
+ <li><a href="Circles-Getstart.html#Circles-Getstart">Circles Getstart</a>
+ 
+ </li></ul>
+ <p>Solid Figures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Cuboid-Getstart.html#Cuboid-Getstart">Cuboid Getstart</a>
+ <li><a href="Polyhedron-Getstart.html#Polyhedron-Getstart">Polyhedron Getstart</a>
+ 
+ </li></ul>
+ <p>Polyhedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Tetrahedron-Getstart.html#Tetrahedron-Getstart">Tetrahedron Getstart</a>
+ <li><a href="Dodecahedron-Getstart.html#Dodecahedron-Getstart">Dodecahedron Getstart</a>
+ <li><a href="Icosahedron-Getstart.html#Icosahedron-Getstart">Icosahedron Getstart</a>
+ 
+ </li></ul>
+ <p>Pictures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Projections.html#Projections">Projections</a>
+ <li><a href="Focuses-Getstart.html#Focuses-Getstart">Focuses Getstart</a>
+ <li><a href="Surface-Hiding.html#Surface-Hiding">Surface Hiding</a>
+ 
+ </li></ul>
+ <p>Projections
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Parallel-Projections.html#Parallel-Projections">Parallel Projections</a>
+ <li><a href="The-Perspective-Projection.html#The-Perspective-Projection">The Perspective Projection</a>
+ 
+ </li></ul>
+ <p>Installing and Running 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Installing-3DLDF.html#Installing-3DLDF">Installing 3DLDF</a>
+ <li><a href="Running-3DLDF.html#Running-3DLDF">Running 3DLDF</a>
+ 
+ </li></ul>
+ <p>Installing 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Template-Functions.html#Template-Functions">Template Functions</a>
+ 
+ </li></ul>
+ <p>Running 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Converting-EPS-Files.html#Converting-EPS-Files">Converting EPS Files</a>
+ <li><a href="Command-Line-Arguments.html#Command-Line-Arguments">Command Line Arguments</a>
+ 
+ </li></ul>
+ <p>Converting EPS Files
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Converting-EPS-Files-ELISP.html#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a>
+ 
+ </li></ul>
+ <p>System Information
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Endianness.html#Endianness">Endianness</a>
+ <li><a href="Register-Width.html#Register-Width">Register Width</a>
+ <li><a href="Get-Second-Largest-Real.html#Get-Second-Largest-Real">Get Second Largest Real</a>
+ 
+ </li></ul>
+ <p>Color Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Color-Data-Members.html#Color-Data-Members">Color Data Members</a>
+ <li><a href="Color-Constructors-and-Setting-Functions.html#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>
+ <li><a href="Color-Operators.html#Color-Operators">Color Operators</a>
+ <li><a href="Modifying-Colors.html#Modifying-Colors">Modifying Colors</a>
+ <li><a href="Showing-Colors.html#Showing-Colors">Showing Colors</a>
+ <li><a href="Querying-Colors.html#Querying-Colors">Querying Colors</a>
+ <li><a href="Defining-and-Initializing-Colors.html#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>
+ <li><a href="Namespace-Colors.html#Namespace-Colors">Namespace Colors</a>
+ 
+ </li></ul>
+ <p>Input and Output
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="I_002fO-Global-Variables.html#I_002fO-Global-Variables">I/O Global Variables</a>
+ <li><a href="I_002fO-Functions.html#I_002fO-Functions">I/O Functions</a>
+ 
+ </li></ul>
+ <p>Shape Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Shape-Data-Members.html#Shape-Data-Members">Shape Data Members</a>
+ <li><a href="Shape-Operators.html#Shape-Operators">Shape Operators</a>
+ <li><a href="Copying-Shapes.html#Copying-Shapes">Copying Shapes</a>
+ <li><a href="Modifying-Shapes.html#Modifying-Shapes">Modifying Shapes</a>
+ <li><a href="Affine-Transformations-for-Shapes.html#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>
+ <li><a href="Applying-Transformations-to-Shapes.html#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>
+ <li><a href="Clearing-Shapes.html#Clearing-Shapes">Clearing Shapes</a>
+ <li><a href="Querying-Shapes.html#Querying-Shapes">Querying Shapes</a>
+ <li><a href="Showing-Shapes.html#Showing-Shapes">Showing Shapes</a>
+ <li><a href="Outputting-Shapes.html#Outputting-Shapes">Outputting Shapes</a>
+ 
+ </li></ul>
+ <p>Transform Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Transform-Data-Members.html#Transform-Data-Members">Transform Data Members</a>
+ <li><a href="Transform-Global-Variables-and-Constants.html#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>
+ <li><a href="Transform-Constructors.html#Transform-Constructors">Transform Constructors </a>
+ <li><a href="Transform-Operators.html#Transform-Operators">Transform Operators</a>
+ <li><a href="Matrix-Inversion.html#Matrix-Inversion">Matrix Inversion</a>
+ <li><a href="Setting-Values-Transforms.html#Setting-Values-Transforms">Setting Values Transforms</a>
+ <li><a href="Querying-Transforms.html#Querying-Transforms">Querying Transforms</a>
+ <li><a href="Returning-Information-for-Transforms.html#Returning-Information-for-Transforms">Returning Information for Transforms</a>
+ <li><a href="Showing-Transforms.html#Showing-Transforms">Showing Transforms</a>
+ <li><a href="Affine-Transformations-for-Transforms.html#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>
+ <li><a href="Alignment-with-an-Axis-for-Transforms.html#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>
+ <li><a href="Resetting-Transforms.html#Resetting-Transforms">Resetting Transforms</a>
+ <li><a href="Cleaning-Transforms.html#Cleaning-Transforms">Cleaning Transforms</a>
+ 
+ </li></ul>
+ <p>Label Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Label-Data-Members.html#Label-Data-Members">Label Data Members</a>
+ <li><a href="Copying-Labels.html#Copying-Labels">Copying Labels</a>
+ <li><a href="Outputting-Labels.html#Outputting-Labels">Outputting Labels</a>
+ 
+ </li></ul>
+ <p>Picture Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Picture-Data-Members.html#Picture-Data-Members">Picture Data Members</a>
+ <li><a href="Picture-Global-Variables.html#Picture-Global-Variables">Picture Global Variables</a>
+ <li><a href="Picture-Constructors.html#Picture-Constructors">Picture Constructors</a>
+ <li><a href="Picture-Operators.html#Picture-Operators">Picture Operators</a>
+ <li><a href="Affine-Transformations-for-Pictures.html#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>
+ <li><a href="Modifying-Pictures.html#Modifying-Pictures">Modifying Pictures</a>
+ <li><a href="Showing-Pictures.html#Showing-Pictures">Showing Pictures</a>
+ <li><a href="Outputting-Pictures.html#Outputting-Pictures">Outputting Pictures</a>
+ 
+ </li></ul>
+ <p>Outputting
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Picture-Output-Namespaces.html#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <li><a href="Picture-Output-Functions.html#Picture-Output-Functions">Picture Output Functions</a>
+ 
+ </li></ul>
+ <p>Namespaces
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Namespace-Projections.html#Namespace-Projections">Namespace Projections</a>
+ <li><a href="Namespace-Sorting.html#Namespace-Sorting">Namespace Sorting</a>
+ 
+ </li></ul>
+ <p>Point Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Point-Data-Members.html#Point-Data-Members">Point Data Members</a>
+ <li><a href="Point-Typedefs-and-Utility-Structures.html#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>
+ <li><a href="Point-Global-Constants-and-Variables.html#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>
+ <li><a href="Point-Constructors-and-Setting-Functions.html#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>
+ <li><a href="Point-Destructor.html#Point-Destructor">Point Destructor</a>
+ <li><a href="Point-Operators.html#Point-Operators">Point Operators</a>
+ <li><a href="Copying-Points.html#Copying-Points">Copying Points</a>
+ <li><a href="Querying-Points.html#Querying-Points">Querying Points</a>
+ <li><a href="Returning-Coordinates.html#Returning-Coordinates">Returning Coordinates</a>
+ <li><a href="Returning-Information-for-Points.html#Returning-Information-for-Points">Returning Information for Points</a>
+ <li><a href="Modifying-Points.html#Modifying-Points">Modifying Points</a>
+ <li><a href="Affine-Transformations-for-Points.html#Affine-Transformations-for-Points">Affine Transformations for Points</a>
+ <li><a href="Applying-Transformations-to-Points.html#Applying-Transformations-to-Points">Applying Transformations to Points</a>
+ <li><a href="Projecting-Points.html#Projecting-Points">Projecting Points</a>
+ <li><a href="Vector-Operations.html#Vector-Operations">Vector Operations</a>
+ <li><a href="Points-and-Lines.html#Points-and-Lines">Points and Lines</a>
+ <li><a href="Point-Intersections.html#Point-Intersections">Point Intersections</a>
+ <li><a href="Point-Drawing-Functions.html#Point-Drawing-Functions">Point Drawing Functions</a>
+ <li><a href="Labelling-Points.html#Labelling-Points">Labelling Points</a>
+ <li><a href="Showing-Points.html#Showing-Points">Showing Points</a>
+ <li><a href="Outputting-Points.html#Outputting-Points">Outputting Points</a>
+ 
+ </li></ul>
+ <p>Focus Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Focus-Data-Members.html#Focus-Data-Members">Focus Data Members</a>
+ <li><a href="Focus-Global-Variables.html#Focus-Global-Variables">Focus Global Variables</a>
+ <li><a href="Focus-Constructors-and-Setting-Functions.html#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>
+ <li><a href="Focus-Operators.html#Focus-Operators">Focus Operators</a>
+ <li><a href="Modifying-Focuses.html#Modifying-Focuses">Modifying Focuses</a>
+ <li><a href="Querying-Focuses.html#Querying-Focuses">Querying Focuses</a>
+ <li><a href="Showing-Focuses.html#Showing-Focuses">Showing Focuses</a>
+ 
+ </li></ul>
+ <p>Line Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Line-Data-Members.html#Line-Data-Members">Line Data Members</a>
+ <li><a href="Line-Global-Constants.html#Line-Global-Constants">Line Global Constants</a>
+ <li><a href="Line-Constructors.html#Line-Constructors">Line Constructors</a>
+ <li><a href="Line-Operators.html#Line-Operators">Line Operators</a>
+ <li><a href="Get-Path.html#Get-Path">Get Path</a>
+ <li><a href="Showing.html#Showing">Showing</a>
+ 
+ </li></ul>
+ <p>Plane Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Planes-Data-Members.html#Planes-Data-Members">Planes Data Members</a>
+ <li><a href="Planes-Global-Constants.html#Planes-Global-Constants">Planes Global Constants</a>
+ <li><a href="Planes-Constructors.html#Planes-Constructors">Planes Constructors</a>
+ <li><a href="Planes-Operators.html#Planes-Operators">Planes Operators</a>
+ <li><a href="Planes-Returning-Information.html#Planes-Returning-Information">Planes Returning Information</a>
+ <li><a href="Plane-Intersections.html#Plane-Intersections">Plane Intersections</a>
+ <li><a href="Planes-Showing.html#Planes-Showing">Planes Showing</a>
+ 
+ </li></ul>
+ <p>Path Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Path-Data-Members.html#Path-Data-Members">Path Data Members</a>
+ <li><a href="Path-Constructors-and-Setting-Functions.html#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>
+ <li><a href="Path-Destructor.html#Path-Destructor">Path Destructor</a>
+ <li><a href="Path-Operators.html#Path-Operators">Path Operators</a>
+ <li><a href="Appending-to-Paths.html#Appending-to-Paths">Appending to Paths </a>
+ <li><a href="Copying-Paths.html#Copying-Paths">Copying Paths</a>
+ <li><a href="Clearing-Paths.html#Clearing-Paths">Clearing Paths </a>
+ <li><a href="Modifying-Paths.html#Modifying-Paths">Modifying Paths </a>
+ <li><a href="Affine-Transformations-for-Paths.html#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>
+ <li><a href="Aligning-Paths-with-an-Axis.html#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>
+ <li><a href="Applying-Transformations-to-Paths.html#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>
+ <li><a href="Drawing-and-Filling-Paths.html#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>
+ <li><a href="Labelling-Paths.html#Labelling-Paths">Labelling Paths</a>
+ <li><a href="Showing-Paths.html#Showing-Paths">Showing Paths</a>
+ <li><a href="Querying-Paths.html#Querying-Paths">Querying Paths</a>
+ <li><a href="Outputting-Paths.html#Outputting-Paths">Outputting Paths</a>
+ <li><a href="Path-Intersections.html#Path-Intersections">Path Intersections</a>
+ 
+ </li></ul>
+ <p>Polygon Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Polygon-Data-Members.html#Polygon-Data-Members">Polygon Data Members</a>
+ <li><a href="Polygon-Operators.html#Polygon-Operators">Polygon Operators</a>
+ <li><a href="Querying-Polygons.html#Querying-Polygons">Querying Polygons</a>
+ <li><a href="Affine-Transformations-for-Polygons.html#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>
+ <li><a href="Polygon-Intersections.html#Polygon-Intersections">Polygon Intersections</a>
+ 
+ </li></ul>
+ <p>Regular Polygon Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Regular-Polygon-Data-Members.html#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>
+ <li><a href="Regular-Polygon-Constructors-and-Setting-Functions.html#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>
+ <li><a href="Regular-Polygon-Operators.html#Regular-Polygon-Operators">Regular Polygon Operators</a>
+ <li><a href="Querying-Regular-Polygons.html#Querying-Regular-Polygons">Querying Regular Polygons</a>
+ <li><a href="Circles-for-Regular-Polygons.html#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>
+ 
+ </li></ul>
+ <p>Rectangle Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Rectangle-Data-Members.html#Rectangle-Data-Members">Rectangle Data Members</a>
+ <li><a href="Rectangle-Constructors-and-Setting-Functions.html#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>
+ <li><a href="Rectangle-Operators.html#Rectangle-Operators">Rectangle Operators</a>
+ <li><a href="Returning-Points-for-Rectangles.html#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>
+ <li><a href="Querying-Rectangles.html#Querying-Rectangles">Querying Rectangles</a>
+ <li><a href="Ellipses-for-Rectangles.html#Ellipses-for-Rectangles">Ellipses for Rectangles</a>
+ 
+ </li></ul>
+ <p>Regular Closed Plane Curve Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Regular-Closed-Plane-Curve-Data-Members.html#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>
+ <li><a href="Querying-Regular-Closed-Plane-Curves.html#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>
+ <li><a href="Regular-Closed-Plane-Curve-Intersections.html#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>
+ <li><a href="Regular-Closed-Plane-Curve-Segments.html#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>
+ 
+ </li></ul>
+ <p>Ellipse Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Ellipse-Data-Members.html#Ellipse-Data-Members">Ellipse Data Members</a>
+ <li><a href="Ellipse-Constructors-and-Setting-Functions.html#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>
+ <li><a href="Performing-Transformations-on-Ellipses.html#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>
+ <li><a href="Ellipse-Operators.html#Ellipse-Operators">Ellipse Operators</a>
+ <li><a href="Labeling-Ellipses.html#Labeling-Ellipses">Labeling Ellipses</a>
+ <li><a href="Affine-Transformations-for-Ellipses.html#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>
+ <li><a href="Querying-Ellipses.html#Querying-Ellipses">Querying Ellipses</a>
+ <li><a href="Returning-Elements-and-Information-for-Ellipses.html#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>
+ <li><a href="Ellipse-Intersections.html#Ellipse-Intersections">Ellipse Intersections</a>
+ <li><a href="Solving-Ellipses.html#Solving-Ellipses">Solving Ellipses</a>
+ <li><a href="Rectangles-for-Ellipses.html#Rectangles-for-Ellipses">Rectangles for Ellipses</a>
+ 
+ </li></ul>
+ <p>Circle Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Circle-Data-Members.html#Circle-Data-Members">Circle Data Members</a>
+ <li><a href="Circle-Constructors-and-Setting-Functions.html#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>
+ <li><a href="Circle-Operators.html#Circle-Operators">Circle Operators</a>
+ <li><a href="Querying-Circles.html#Querying-Circles">Querying Circles</a>
+ <li><a href="Circle-Intersections.html#Circle-Intersections">Circle Intersections</a>
+ 
+ </li></ul>
+ <p>Pattern Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Plane-Tesselations.html#Plane-Tesselations">Plane Tesselations</a>
+ <li><a href="Roulettes-and-Involutes.html#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ 
+ </li></ul>
+ <p>Roulettes and Involutes
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Epicycloids.html#Epicycloids">Epicycloids</a>
+ 
+ </li></ul>
+ <p>Solid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Solid-Data-Members.html#Solid-Data-Members">Solid Data Members</a>
+ <li><a href="Solid-Constructors-and-Setting-Functions.html#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>
+ <li><a href="Solid-Destructor.html#Solid-Destructor">Solid Destructor</a>
+ <li><a href="Solid-Operators.html#Solid-Operators">Solid Operators</a>
+ <li><a href="Copying-Solids.html#Copying-Solids">Copying Solids</a>
+ <li><a href="Setting-Solid-Members.html#Setting-Solid-Members">Setting Solid Members</a>
+ <li><a href="Querying-Solids.html#Querying-Solids">Querying Solids</a>
+ <li><a href="Returning-Elements-and-Information-Solids.html#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <li><a href="Showing-Solids.html#Showing-Solids">Showing Solids</a>
+ <li><a href="Affine-Transformations-for-Solids.html#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>
+ <li><a href="Applying-Transformations-to-Solids.html#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>
+ <li><a href="Outputting-Solids.html#Outputting-Solids">Outputting Solids</a>
+ <li><a href="Drawing-and-Filling-Solids.html#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>
+ <li><a href="Clearing-Solids.html#Clearing-Solids">Clearing Solids</a>
+ 
+ </li></ul>
+ <p>Returning Elements and Information
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Getting-Shape-Centers-Solids.html#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>
+ <li><a href="Getting-Shapes-Solids.html#Getting-Shapes-Solids">Getting Shapes Solids</a>
+ 
+ </li></ul>
+ <p>Faced Solid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Solid_005fFaced-Data-Members.html#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a>
+ 
+ </li></ul>
+ <p>Cuboid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Cuboid-Data-Members.html#Cuboid-Data-Members">Cuboid Data Members</a>
+ <li><a href="Cuboid-Constructors-and-Setting-Functions.html#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>
+ <li><a href="Cuboid-Operators.html#Cuboid-Operators">Cuboid Operators</a>
+ 
+ </li></ul>
+ <p>Polyhedron Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Polyhedron-Data-Members.html#Polyhedron-Data-Members">Polyhedron Data Members</a>
+ <li><a href="Regular-Platonic-Polyhedra.html#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <li><a href="Semi_002dRegular-Archimedean-Polyhedra.html#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ 
+ </li></ul>
+ <p>Regular Platonic Polyhedra
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Tetrahedron.html#Tetrahedron">Tetrahedron</a>
+ <li><a href="Dodecahedron.html#Dodecahedron">Dodecahedron</a>
+ <li><a href="Icosahedron.html#Icosahedron">Icosahedron</a>
+ 
+ </li></ul>
+ <p>Tetrahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Tetrahedron-Data-Members.html#Tetrahedron-Data-Members">Tetrahedron Data Members</a>
+ <li><a href="Tetrahedron-Constructors-and-Setting-Functions.html#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>
+ <li><a href="Tetrahedron-Net.html#Tetrahedron-Net">Tetrahedron Net</a>
+ 
+ </li></ul>
+ <p>Dodecahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Dodecahedron-Data-Members.html#Dodecahedron-Data-Members">Dodecahedron Data Members</a>
+ <li><a href="Dodecahedron-Constructors-and-Setting-Functions.html#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>
+ <li><a href="Dodecahedron-Net.html#Dodecahedron-Net">Dodecahedron Net</a>
+ 
+ </li></ul>
+ <p>Icosahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Icosahedron-Data-Members.html#Icosahedron-Data-Members">Icosahedron Data Members</a>
+ <li><a href="Icosahedron-Constructors-and-Setting-Functions.html#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>
+ <li><a href="Icosahedron-Net.html#Icosahedron-Net">Icosahedron Net</a>
+ 
+ </li></ul>
+ <p>Semi-Regular Archimedean Polyhedra
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Truncated-Octahedron.html#Truncated-Octahedron">Truncated Octahedron</a>
+ 
+ </li></ul>
+ <p>Truncated Octahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Truncated-Octahedron-Data-Members.html#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>
+ <li><a href="Truncated-Octahedron-Constructors-and-Setting-Functions.html#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>
+ <li><a href="Truncated-Octahedron-Net.html#Truncated-Octahedron-Net">Truncated Octahedron Net</a>
+ 
+ </li></ul>
+ <p>Utility Functions
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Perspective-Functions.html#Perspective-Functions">Perspective Functions</a>
+ 
+ </li></ul>
+ <p>Future Plans
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Geometry.html#Geometry">Geometry</a>
+ <li><a href="Curves-and-Surfaces.html#Curves-and-Surfaces">Curves and Surfaces</a>
+ <li><a href="Shadows.html#Shadows">Shadows</a>
+ <li><a href="Multi_002dThreading.html#Multi_002dThreading">Multi-Threading</a>
+ 
+ </li></ul>
+ <p>Changes
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5_002e1.html#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e5.html#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4_002e2.html#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4_002e1.html#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>
+ <li><a href="Changes-in-3DLDF-1_002e1_002e4.html#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>
+ <li><a href="Initial-version.html#Initial-version">Initial version</a>
+ 
+    </ul>
+ 
+ <!-- UBAR is only used in code written to examples.web.  There's no need -->
+ <!-- for versions for it for Info or HTML.  LDF 2003.12.07. -->
+ <!-- Kludge!  This won't work for 1 degree in the Info version! -->
+ <!-- LDF 2003.11.25. -->
+ <!-- %% \OCB and \CCB are used in \BGRP and \EGRP (begin group and end group) -->
+ <!-- %% for writing curly braces to the file of 3DLDF example code. -->
+ <!-- Calling this `@TIMES' caused problems.  Maybe the name wasn't the -->
+ <!-- reason, though.  But I don't feel like experimenting to find out. -->
+ <!-- LDF 2003.12.08. -->
+ <!-- ``By'' for matrices. -->
+ <!-- intro.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <!-- node-name,  next,  previous,  up -->
+    </body></html>
+ 
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+ <html lang="en">
+ <head>
+ <title>3DLDF User and Reference Manual</title>
+ <meta http-equiv="Content-Type" content="text/html">
+ <meta name="description" content="3DLDF User and Reference Manual">
+ <meta name="generator" content="makeinfo 4.13">
+ <link title="Top" rel="top" href="#Top">
+ <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+ <!--
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.
+ This manual was last updated on
+ 16 January 2004.
+ 
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.
+ The author is Laurence D. Finston.
+ 
+ Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled "GNU Free Documentation License".
+    -->
+ <meta http-equiv="Content-Style-Type" content="text/css">
+ <style type="text/css"><!--
+   pre.display { font-family:inherit }
+   pre.format  { font-family:inherit }
+   pre.smalldisplay { font-family:inherit; font-size:smaller }
+   pre.smallformat  { font-family:inherit; font-size:smaller }
+   pre.smallexample { font-size:smaller }
+   pre.smalllisp    { font-size:smaller }
+   span.sc    { font-variant:small-caps }
+   span.roman { font-family:serif; font-weight:normal; } 
+   span.sansserif { font-family:sans-serif; font-weight:normal; } 
+ --></style>
+ </head>
+ <body>
+ <h1 class="settitle">3DLDF User and Reference Manual</h1>
+    <div class="shortcontents">
+ <h2>Short Contents</h2>
+ <ul>
+ <li><a href="#toc_Introduction">1 Introduction</a></li>
+ <li><a href="#toc_Points">2 Points</a></li>
+ <li><a href="#toc_Transforming-Points">3 Transforming Points</a></li>
+ <li><a href="#toc_Transforms">4 Transforms</a></li>
+ <li><a href="#toc_Drawing-and-Labeling-Points">5 Drawing and Labeling Points</a></li>
+ <li><a href="#toc_Paths">6 Paths</a></li>
+ <li><a href="#toc_Plane-Figures">7 Plane Figures</a></li>
+ <li><a href="#toc_Solid-Figures">8 Solid Figures</a></li>
+ <li><a href="#toc_Pictures">9 Pictures</a></li>
+ <li><a href="#toc_Intersections">10 Intersections</a></li>
+ <li><a href="#toc_Installing-and-Running-3DLDF">11 Installing and Running 3DLDF</a></li>
+ <li><a href="#toc_Typedefs-and-Utility-Structures">12 Typedefs and Utility Structures</a></li>
+ <li><a href="#toc_Global-Constants-and-Variables">13 Global Constants and Variables</a></li>
+ <li><a href="#toc_Dynamic-Allocation-of-Shapes">14 Dynamic Allocation of Shapes</a></li>
+ <li><a href="#toc_System-Information">15 System Information</a></li>
+ <li><a href="#toc_Color-Reference">16 Color Reference</a></li>
+ <li><a href="#toc_Input-and-Output">17 Input and Output</a></li>
+ <li><a href="#toc_Shape-Reference">18 Shape Reference</a></li>
+ <li><a href="#toc_Transform-Reference">19 Transform Reference</a></li>
+ <li><a href="#toc_Label-Reference">20 Label Reference</a></li>
+ <li><a href="#toc_Picture-Reference">21 Picture Reference</a></li>
+ <li><a href="#toc_Point-Reference">22 Point Reference</a></li>
+ <li><a href="#toc_Focus-Reference">23 Focus Reference</a></li>
+ <li><a href="#toc_Line-Reference">24 Line Reference</a></li>
+ <li><a href="#toc_Plane-Reference">25 Plane Reference</a></li>
+ <li><a href="#toc_Path-Reference">26 Path Reference</a></li>
+ <li><a href="#toc_Polygon-Reference">27 Polygon Reference</a></li>
+ <li><a href="#toc_Regular-Polygon-Reference">28 Regular Polygon Reference</a></li>
+ <li><a href="#toc_Rectangle-Reference">29 Rectangle Reference</a></li>
+ <li><a href="#toc_Regular-Closed-Plane-Curve-Reference">30 Regular Closed Plane Curve Reference</a></li>
+ <li><a href="#toc_Ellipse-Reference">31 Ellipse Reference</a></li>
+ <li><a href="#toc_Circle-Reference">32 Circle Reference</a></li>
+ <li><a href="#toc_Pattern-Reference">33 Pattern Reference</a></li>
+ <li><a href="#toc_Solid-Reference">34 Solid Reference</a></li>
+ <li><a href="#toc_Faced-Solid-Reference">35 Faced Solid Reference</a></li>
+ <li><a href="#toc_Cuboid-Reference">36 Cuboid Reference</a></li>
+ <li><a href="#toc_Polyhedron-Reference">37 Polyhedron Reference</a></li>
+ <li><a href="#toc_Utility-Functions">38 Utility Functions</a></li>
+ <li><a href="#toc_Adding-a-File">39 Adding a File</a></li>
+ <li><a href="#toc_Future-Plans">40 Future Plans</a></li>
+ <li><a href="#toc_Changes">41 Changes</a></li>
+ <li><a href="#toc_Bibliography">Bibliography</a></li>
+ <li><a href="#toc_GNU-Free-Documentation-License">Appendix A GNU Free Documentation License</a></li>
+ <li><a href="#toc_Data-Type-and-Variable-Index">Data Type and Variable Index</a></li>
+ <li><a href="#toc_Function-Index">Function Index</a></li>
+ <li><a href="#toc_Concept-Index">Concept Index</a></li>
+ </ul>
+ </div>
+ 
+ 
+ 
+    <div class="contents">
+ <h2>Table of Contents</h2>
+ <ul>
+ <li><a name="toc_Introduction" href="#Introduction">1 Introduction</a>
+ <ul>
+ <li><a href="#Sources-of-Information">1.1 Sources of Information</a>
+ <li><a href="#About-This-Manual">1.2 About This Manual</a>
+ <ul>
+ <li><a href="#Manual-Conventions">1.2.1 Conventions</a>
+ <li><a href="#Illustrations">1.2.2 Illustrations</a>
+ </li></ul>
+ <li><a href="#CWEB-Documentation">1.3 CWEB Documentation</a>
+ <li><a href="#Metafont-and-MetaPost">1.4 Metafont and MetaPost</a>
+ <li><a href="#Caveats">1.5 Caveats</a>
+ <ul>
+ <li><a href="#Accuracy">1.5.1 Accuracy</a>
+ <li><a href="#No-Input-Routine">1.5.2 No Input Routine</a>
+ </li></ul>
+ <li><a href="#Ports">1.6 Ports</a>
+ <li><a href="#Contributing-to-3DLDF">1.7 Contributing to 3DLDF</a>
+ </li></ul>
+ <li><a name="toc_Points" href="#Points">2 Points</a>
+ <ul>
+ <li><a href="#Declaring-and-Initializing-Points">2.1 Declaring and Initializing Points</a>
+ <li><a href="#Setting-and-Assigning-to-Points">2.2 Setting and Assigning to Points</a>
+ </li></ul>
+ <li><a name="toc_Transforming-Points" href="#Transforming-Points">3 Transforming Points</a>
+ <ul>
+ <li><a href="#Shifting-Points">3.1 Shifting</a>
+ <li><a href="#Scaling-Points">3.2 Scaling</a>
+ <li><a href="#Shearing-Points">3.3 Shearing</a>
+ <li><a href="#Rotating-Points">3.4 Rotating</a>
+ </li></ul>
+ <li><a name="toc_Transforms" href="#Transforms">4 Transforms</a>
+ <ul>
+ <li><a href="#Applying-Transforms-to-Points-Intro">4.1 Applying Transforms to Points</a>
+ <li><a href="#Inverting-Transforms">4.2 Inverting Transforms</a>
+ </li></ul>
+ <li><a name="toc_Drawing-and-Labeling-Points" href="#Drawing-and-Labeling-Points">5 Drawing and Labeling Points</a>
+ <ul>
+ <li><a href="#Drawing-Points-Intro">5.1 Drawing Points</a>
+ <li><a href="#Labeling-Points-Intro">5.2 Labeling Points</a>
+ </li></ul>
+ <li><a name="toc_Paths" href="#Paths">6 Paths</a>
+ <ul>
+ <li><a href="#Declaring-and-Initializing-Paths">6.1 Declaring and Initializing Paths</a>
+ <li><a href="#Drawing-and-Filling-Paths-Intro">6.2 Drawing and Filling Paths</a>
+ </li></ul>
+ <li><a name="toc_Plane-Figures" href="#Plane-Figures">7 Plane Figures</a>
+ <ul>
+ <li><a href="#Regular-Polygons-Getstart">7.1 Regular Polygons</a>
+ <li><a href="#Rectangles-Getstart">7.2 Rectangles</a>
+ <li><a href="#Ellipses-Getstart">7.3 Ellipses</a>
+ <li><a href="#Circles-Getstart">7.4 Circles</a>
+ </li></ul>
+ <li><a name="toc_Solid-Figures" href="#Solid-Figures">8 Solid Figures</a>
+ <ul>
+ <li><a href="#Cuboid-Getstart">8.1 Cuboids</a>
+ <li><a href="#Polyhedron-Getstart">8.2 Polyhedron</a>
+ <ul>
+ <li><a href="#Tetrahedron-Getstart">8.2.1 Tetrahedron</a>
+ <li><a href="#Dodecahedron-Getstart">8.2.2 Dodecahedron</a>
+ <li><a href="#Icosahedron-Getstart">8.2.3 Icosahedron</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Pictures" href="#Pictures">9 Pictures</a>
+ <ul>
+ <li><a href="#Projections">9.1 Projections</a>
+ <ul>
+ <li><a href="#Parallel-Projections">9.1.1 Parallel Projections</a>
+ <li><a href="#The-Perspective-Projection">9.1.2 The Perspective Projection</a>
+ </li></ul>
+ <li><a href="#Focuses-Getstart">9.2 Focuses</a>
+ <li><a href="#Surface-Hiding">9.3 Surface Hiding</a>
+ </li></ul>
+ <li><a name="toc_Intersections" href="#Intersections">10 Intersections</a>
+ <li><a name="toc_Installing-and-Running-3DLDF" href="#Installing-and-Running-3DLDF">11 Installing and Running 3DLDF</a>
+ <ul>
+ <li><a href="#Installing-3DLDF">11.1 Installing 3DLDF</a>
+ <ul>
+ <li><a href="#Template-Functions">11.1.1 Template Functions</a>
+ </li></ul>
+ <li><a href="#Running-3DLDF">11.2 Running 3DLDF</a>
+ <ul>
+ <li><a href="#Converting-EPS-Files">11.2.1 Converting EPS Files</a>
+ <ul>
+ <li><a href="#Converting-EPS-Files-ELISP">11.2.1.1 Emacs-Lisp Functions</a>
+ </li></ul>
+ <li><a href="#Command-Line-Arguments">11.2.2 Command Line Arguments</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Typedefs-and-Utility-Structures" href="#Typedefs-and-Utility-Structures">12 Typedefs and Utility Structures</a>
+ <li><a name="toc_Global-Constants-and-Variables" href="#Global-Constants-and-Variables">13 Global Constants and Variables</a>
+ <li><a name="toc_Dynamic-Allocation-of-Shapes" href="#Dynamic-Allocation-of-Shapes">14 Dynamic Allocation of Shapes</a>
+ <li><a name="toc_System-Information" href="#System-Information">15 System Information</a>
+ <ul>
+ <li><a href="#Endianness">15.1 Endianness</a>
+ <li><a href="#Register-Width">15.2 Register Width</a>
+ <li><a href="#Get-Second-Largest-Real">15.3 Get Second Largest Real</a>
+ </li></ul>
+ <li><a name="toc_Color-Reference" href="#Color-Reference">16 Color Reference</a>
+ <ul>
+ <li><a href="#Color-Data-Members">16.1 Data Members</a>
+ <li><a href="#Color-Constructors-and-Setting-Functions">16.2 Constructors and Setting Functions</a>
+ <li><a href="#Color-Operators">16.3 Operators</a>
+ <li><a href="#Modifying-Colors">16.4 Modifying</a>
+ <li><a href="#Showing-Colors">16.5 Showing</a>
+ <li><a href="#Querying-Colors">16.6 Querying</a>
+ <li><a href="#Defining-and-Initializing-Colors">16.7 Defining and Initializing Colors</a>
+ <li><a href="#Namespace-Colors">16.8 Namespace Colors.</a>
+ </li></ul>
+ <li><a name="toc_Input-and-Output" href="#Input-and-Output">17 Input and Output</a>
+ <ul>
+ <li><a href="#I_002fO-Global-Variables">17.1 Global Variables</a>
+ <li><a href="#I_002fO-Functions">17.2 I/O Functions</a>
+ </li></ul>
+ <li><a name="toc_Shape-Reference" href="#Shape-Reference">18 Shape Reference</a>
+ <ul>
+ <li><a href="#Shape-Data-Members">18.1 Data Members</a>
+ <li><a href="#Shape-Operators">18.2 Operators</a>
+ <li><a href="#Copying-Shapes">18.3 Copying</a>
+ <li><a href="#Modifying-Shapes">18.4 Modifying</a>
+ <li><a href="#Affine-Transformations-for-Shapes">18.5 Affine Transformations</a>
+ <li><a href="#Applying-Transformations-to-Shapes">18.6 Applying Transformations</a>
+ <li><a href="#Clearing-Shapes">18.7 Clearing</a>
+ <li><a href="#Querying-Shapes">18.8 Querying</a>
+ <li><a href="#Showing-Shapes">18.9 Showing</a>
+ <li><a href="#Outputting-Shapes">18.10 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Transform-Reference" href="#Transform-Reference">19 Transform Reference</a>
+ <ul>
+ <li><a href="#Transform-Data-Members">19.1 Data Members</a>
+ <li><a href="#Transform-Global-Variables-and-Constants">19.2 Global Variables and Constants</a>
+ <li><a href="#Transform-Constructors">19.3 Constructors</a>
+ <li><a href="#Transform-Operators">19.4 Operators</a>
+ <li><a href="#Matrix-Inversion">19.5 Matrix Inversion</a>
+ <li><a href="#Setting-Values-Transforms">19.6 Setting Values</a>
+ <li><a href="#Querying-Transforms">19.7 Querying</a>
+ <li><a href="#Returning-Information-for-Transforms">19.8 Returning Information</a>
+ <li><a href="#Showing-Transforms">19.9 Showing</a>
+ <li><a href="#Affine-Transformations-for-Transforms">19.10 Affine Transformations</a>
+ <li><a href="#Alignment-with-an-Axis-for-Transforms">19.11 Alignment with an Axis</a>
+ <li><a href="#Resetting-Transforms">19.12 Resetting</a>
+ <li><a href="#Cleaning-Transforms">19.13 Cleaning</a>
+ </li></ul>
+ <li><a name="toc_Label-Reference" href="#Label-Reference">20 Label Reference</a>
+ <ul>
+ <li><a href="#Label-Data-Members">20.1 Data Members</a>
+ <li><a href="#Copying-Labels">20.2 Copying</a>
+ <li><a href="#Outputting-Labels">20.3 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Picture-Reference" href="#Picture-Reference">21 Picture Reference</a>
+ <ul>
+ <li><a href="#Picture-Data-Members">21.1 Data Members</a>
+ <li><a href="#Picture-Global-Variables">21.2 Global Variables</a>
+ <li><a href="#Picture-Constructors">21.3 Constructors</a>
+ <li><a href="#Picture-Operators">21.4 Operators</a>
+ <li><a href="#Affine-Transformations-for-Pictures">21.5 Affine Transformations</a>
+ <li><a href="#Modifying-Pictures">21.6 Modifying</a>
+ <li><a href="#Showing-Pictures">21.7 Showing</a>
+ <li><a href="#Outputting-Pictures">21.8 Outputting</a>
+ <ul>
+ <li><a href="#Picture-Output-Namespaces">21.8.1 Namespaces</a>
+ <ul>
+ <li><a href="#Namespace-Projections">21.8.1.1 Namespace Projections</a>
+ <li><a href="#Namespace-Sorting">21.8.1.2 Namespace Sorting</a>
+ </li></ul>
+ <li><a href="#Picture-Output-Functions">21.8.2 Output Functions</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Point-Reference" href="#Point-Reference">22 Point Reference</a>
+ <ul>
+ <li><a href="#Point-Data-Members">22.1 Data Members</a>
+ <li><a href="#Point-Typedefs-and-Utility-Structures">22.2 Typedefs and Utility Structures</a>
+ <li><a href="#Point-Global-Constants-and-Variables">22.3 Global Constants and Variables</a>
+ <li><a href="#Point-Constructors-and-Setting-Functions">22.4 Constructors and Setting Functions</a>
+ <li><a href="#Point-Destructor">22.5 Destructor</a>
+ <li><a href="#Point-Operators">22.6 Operators</a>
+ <li><a href="#Copying-Points">22.7 Copying</a>
+ <li><a href="#Querying-Points">22.8 Querying</a>
+ <li><a href="#Returning-Coordinates">22.9 Returning Coordinates</a>
+ <li><a href="#Returning-Information-for-Points">22.10 Returning Information</a>
+ <li><a href="#Modifying-Points">22.11 Modifying</a>
+ <li><a href="#Affine-Transformations-for-Points">22.12 Affine Transformations</a>
+ <li><a href="#Applying-Transformations-to-Points">22.13 Applying Transformations</a>
+ <li><a href="#Projecting-Points">22.14 Projecting</a>
+ <li><a href="#Vector-Operations">22.15 Vector Operations</a>
+ <li><a href="#Points-and-Lines">22.16 Points and Lines</a>
+ <li><a href="#Point-Intersections">22.17 Intersections</a>
+ <li><a href="#Point-Drawing-Functions">22.18 Drawing</a>
+ <li><a href="#Labelling-Points">22.19 Labelling</a>
+ <li><a href="#Showing-Points">22.20 Showing</a>
+ <li><a href="#Outputting-Points">22.21 Outputting</a>
+ </li></ul>
+ <li><a name="toc_Focus-Reference" href="#Focus-Reference">23 Focus Reference</a>
+ <ul>
+ <li><a href="#Focus-Data-Members">23.1 Data Members</a>
+ <li><a href="#Focus-Global-Variables">23.2 Global Variables</a>
+ <li><a href="#Focus-Constructors-and-Setting-Functions">23.3 Constructors and Setting Functions</a>
+ <li><a href="#Focus-Operators">23.4 Operators</a>
+ <li><a href="#Modifying-Focuses">23.5 Modifying</a>
+ <li><a href="#Querying-Focuses">23.6 Querying</a>
+ <li><a href="#Showing-Focuses">23.7 Showing</a>
+ </li></ul>
+ <li><a name="toc_Line-Reference" href="#Line-Reference">24 Line Reference</a>
+ <ul>
+ <li><a href="#Line-Data-Members">24.1 Data Members</a>
+ <li><a href="#Line-Global-Constants">24.2 Global Constants</a>
+ <li><a href="#Line-Constructors">24.3 Constructors</a>
+ <li><a href="#Line-Operators">24.4 Operators</a>
+ <li><a href="#Get-Path">24.5 Get Path</a>
+ <li><a href="#Showing">24.6 Showing</a>
+ </li></ul>
+ <li><a name="toc_Plane-Reference" href="#Plane-Reference">25 Plane Reference</a>
+ <ul>
+ <li><a href="#Planes-Data-Members">25.1 Data Members</a>
+ <li><a href="#Planes-Global-Constants">25.2 Global Constants</a>
+ <li><a href="#Planes-Constructors">25.3 Constructors</a>
+ <li><a href="#Planes-Operators">25.4 Operators</a>
+ <li><a href="#Planes-Returning-Information">25.5 Returning Information</a>
+ <li><a href="#Plane-Intersections">25.6 Intersections</a>
+ <li><a href="#Planes-Showing">25.7 Showing</a>
+ </li></ul>
+ <li><a name="toc_Path-Reference" href="#Path-Reference">26 Path Reference</a>
+ <ul>
+ <li><a href="#Path-Data-Members">26.1 Data Members</a>
+ <li><a href="#Path-Constructors-and-Setting-Functions">26.2 Constructors and Setting Functions</a>
+ <li><a href="#Path-Destructor">26.3 Destructor</a>
+ <li><a href="#Path-Operators">26.4 Operators</a>
+ <li><a href="#Appending-to-Paths">26.5 Appending</a>
+ <li><a href="#Copying-Paths">26.6 Copying</a>
+ <li><a href="#Clearing-Paths">26.7 Clearing</a>
+ <li><a href="#Modifying-Paths">26.8 Modifying</a>
+ <li><a href="#Affine-Transformations-for-Paths">26.9 Affine Transformations</a>
+ <li><a href="#Aligning-Paths-with-an-Axis">26.10 Aligning with an Axis</a>
+ <li><a href="#Applying-Transformations-to-Paths">26.11 Applying Transformations</a>
+ <li><a href="#Drawing-and-Filling-Paths">26.12 Drawing and Filling</a>
+ <li><a href="#Labelling-Paths">26.13 Labelling</a>
+ <li><a href="#Showing-Paths">26.14 Showing</a>
+ <li><a href="#Querying-Paths">26.15 Querying</a>
+ <li><a href="#Outputting-Paths">26.16 Outputting</a>
+ <li><a href="#Path-Intersections">26.17 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Polygon-Reference" href="#Polygon-Reference">27 Polygon Reference</a>
+ <ul>
+ <li><a href="#Polygon-Data-Members">27.1 Data Members</a>
+ <li><a href="#Polygon-Operators">27.2 Operators</a>
+ <li><a href="#Querying-Polygons">27.3 Querying</a>
+ <li><a href="#Affine-Transformations-for-Polygons">27.4 Affine Transformations</a>
+ <li><a href="#Polygon-Intersections">27.5 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Regular-Polygon-Reference" href="#Regular-Polygon-Reference">28 Regular Polygon Reference</a>
+ <ul>
+ <li><a href="#Regular-Polygon-Data-Members">28.1 Data Members</a>
+ <li><a href="#Regular-Polygon-Constructors-and-Setting-Functions">28.2 Constructors and Setting Functions</a>
+ <li><a href="#Regular-Polygon-Operators">28.3 Operators</a>
+ <li><a href="#Querying-Regular-Polygons">28.4 Querying</a>
+ <li><a href="#Circles-for-Regular-Polygons">28.5 Circles</a>
+ </li></ul>
+ <li><a name="toc_Rectangle-Reference" href="#Rectangle-Reference">29 Rectangle Reference</a>
+ <ul>
+ <li><a href="#Rectangle-Data-Members">29.1 Data Members</a>
+ <li><a href="#Rectangle-Constructors-and-Setting-Functions">29.2 Constructors and Setting Functions</a>
+ <li><a href="#Rectangle-Operators">29.3 Operators</a>
+ <li><a href="#Returning-Points-for-Rectangles">29.4 Returning Points</a>
+ <li><a href="#Querying-Rectangles">29.5 Querying</a>
+ <li><a href="#Ellipses-for-Rectangles">29.6 Ellipses</a>
+ </li></ul>
+ <li><a name="toc_Regular-Closed-Plane-Curve-Reference" href="#Regular-Closed-Plane-Curve-Reference">30 Regular Closed Plane Curve Reference</a>
+ <ul>
+ <li><a href="#Regular-Closed-Plane-Curve-Data-Members">30.1 Data Members</a>
+ <li><a href="#Querying-Regular-Closed-Plane-Curves">30.2 Querying</a>
+ <li><a href="#Regular-Closed-Plane-Curve-Intersections">30.3 Intersections</a>
+ <li><a href="#Regular-Closed-Plane-Curve-Segments">30.4 Segments</a>
+ </li></ul>
+ <li><a name="toc_Ellipse-Reference" href="#Ellipse-Reference">31 Ellipse Reference</a>
+ <ul>
+ <li><a href="#Ellipse-Data-Members">31.1 Data Members</a>
+ <li><a href="#Ellipse-Constructors-and-Setting-Functions">31.2 Constructors and Setting Functions</a>
+ <li><a href="#Performing-Transformations-on-Ellipses">31.3 Performing Transformations</a>
+ <li><a href="#Ellipse-Operators">31.4 Operators</a>
+ <li><a href="#Labeling-Ellipses">31.5 Labeling</a>
+ <li><a href="#Affine-Transformations-for-Ellipses">31.6 Affine Transformations</a>
+ <li><a href="#Querying-Ellipses">31.7 Querying</a>
+ <li><a href="#Returning-Elements-and-Information-for-Ellipses">31.8 Returning Elements and Information</a>
+ <li><a href="#Ellipse-Intersections">31.9 Intersections</a>
+ <li><a href="#Solving-Ellipses">31.10 Solving</a>
+ <li><a href="#Rectangles-for-Ellipses">31.11 Rectangles</a>
+ </li></ul>
+ <li><a name="toc_Circle-Reference" href="#Circle-Reference">32 Circle Reference</a>
+ <ul>
+ <li><a href="#Circle-Data-Members">32.1 Data Members</a>
+ <li><a href="#Circle-Constructors-and-Setting-Functions">32.2 Constructors and Setting Functions</a>
+ <li><a href="#Circle-Operators">32.3 Operators</a>
+ <li><a href="#Querying-Circles">32.4 Querying</a>
+ <li><a href="#Circle-Intersections">32.5 Intersections</a>
+ </li></ul>
+ <li><a name="toc_Pattern-Reference" href="#Pattern-Reference">33 Pattern Reference</a>
+ <ul>
+ <li><a href="#Plane-Tesselations">33.1 Plane Tesselations</a>
+ <li><a href="#Roulettes-and-Involutes">33.2 Roulettes and Involutes</a>
+ <ul>
+ <li><a href="#Epicycloids">33.2.1 Epicycloids</a>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Solid-Reference" href="#Solid-Reference">34 Solid Reference</a>
+ <ul>
+ <li><a href="#Solid-Data-Members">34.1 Data Members</a>
+ <li><a href="#Solid-Constructors-and-Setting-Functions">34.2 Constructors and Setting Functions</a>
+ <li><a href="#Solid-Destructor">34.3 Destructor</a>
+ <li><a href="#Solid-Operators">34.4 Operators</a>
+ <li><a href="#Copying-Solids">34.5 Copying</a>
+ <li><a href="#Setting-Solid-Members">34.6 Setting Members</a>
+ <li><a href="#Querying-Solids">34.7 Querying</a>
+ <li><a href="#Returning-Elements-and-Information-Solids">34.8 Returning Elements and Information</a>
+ <ul>
+ <li><a href="#Getting-Shape-Centers-Solids">Getting Shape Centers</a>
+ <li><a href="#Getting-Shapes-Solids">Getting Shapes</a>
+ </li></ul>
+ <li><a href="#Showing-Solids">34.9 Showing</a>
+ <li><a href="#Affine-Transformations-for-Solids">34.10 Affine Transformations</a>
+ <li><a href="#Applying-Transformations-to-Solids">34.11 Applying Transformations</a>
+ <li><a href="#Outputting-Solids">34.12 Outputting</a>
+ <li><a href="#Drawing-and-Filling-Solids">34.13 Drawing and Filling</a>
+ <li><a href="#Clearing-Solids">34.14 Clearing</a>
+ </li></ul>
+ <li><a name="toc_Faced-Solid-Reference" href="#Faced-Solid-Reference">35 Faced Solid Reference</a>
+ <ul>
+ <li><a href="#Solid_005fFaced-Data-Members">35.1 Data Members</a>
+ </li></ul>
+ <li><a name="toc_Cuboid-Reference" href="#Cuboid-Reference">36 Cuboid Reference</a>
+ <ul>
+ <li><a href="#Cuboid-Data-Members">36.1 Data Members</a>
+ <li><a href="#Cuboid-Constructors-and-Setting-Functions">36.2 Constructors and Setting Functions</a>
+ <li><a href="#Cuboid-Operators">36.3 Operators</a>
+ </li></ul>
+ <li><a name="toc_Polyhedron-Reference" href="#Polyhedron-Reference">37 Polyhedron Reference</a>
+ <ul>
+ <li><a href="#Polyhedron-Data-Members">37.1 Data Members</a>
+ <li><a href="#Regular-Platonic-Polyhedra">37.2 Regular Platonic Polyhedra</a>
+ <ul>
+ <li><a href="#Tetrahedron">37.2.1 Tetrahedron</a>
+ <ul>
+ <li><a href="#Tetrahedron-Data-Members">37.2.1.1 Data Members</a>
+ <li><a href="#Tetrahedron-Constructors-and-Setting-Functions">37.2.1.2 Constructors and Setting Functions</a>
+ <li><a href="#Tetrahedron-Net">37.2.1.3 Net</a>
+ </li></ul>
+ <li><a href="#Dodecahedron">37.2.2 Dodecahedron</a>
+ <ul>
+ <li><a href="#Dodecahedron-Data-Members">37.2.2.1 Data Members</a>
+ <li><a href="#Dodecahedron-Constructors-and-Setting-Functions">37.2.2.2 Constructors and Setting Functions</a>
+ <li><a href="#Dodecahedron-Net">37.2.2.3 Net</a>
+ </li></ul>
+ <li><a href="#Icosahedron">37.2.3 Icosahedron</a>
+ <ul>
+ <li><a href="#Icosahedron-Data-Members">37.2.3.1 Data Members</a>
+ <li><a href="#Icosahedron-Constructors-and-Setting-Functions">37.2.3.2 Constructors and Setting Functions</a>
+ <li><a href="#Icosahedron-Net">37.2.3.3 Net</a>
+ </li></ul>
+ </li></ul>
+ <li><a href="#Semi_002dRegular-Archimedean-Polyhedra">37.3 Semi-Regular Archimedean Polyhedra</a>
+ <ul>
+ <li><a href="#Truncated-Octahedron">37.3.1 Truncated Octahedron</a>
+ <ul>
+ <li><a href="#Truncated-Octahedron-Data-Members">37.3.1.1 Data Members</a>
+ <li><a href="#Truncated-Octahedron-Constructors-and-Setting-Functions">37.3.1.2 Constructors and Setting Functions</a>
+ <li><a href="#Truncated-Octahedron-Net">37.3.1.3 Net</a>
+ </li></ul>
+ </li></ul>
+ </li></ul>
+ <li><a name="toc_Utility-Functions" href="#Utility-Functions">38 Utility Functions</a>
+ <ul>
+ <li><a href="#Perspective-Functions">38.1 Perspective Functions</a>
+ </li></ul>
+ <li><a name="toc_Adding-a-File" href="#Adding-a-File">39 Adding a File</a>
+ <li><a name="toc_Future-Plans" href="#Future-Plans">40 Future Plans</a>
+ <ul>
+ <li><a href="#Geometry">40.1 Geometry</a>
+ <li><a href="#Curves-and-Surfaces">40.2 Curves and Surfaces</a>
+ <li><a href="#Shadows">40.3 Shadows, Reflections, and Rendering</a>
+ <li><a href="#Multi_002dThreading">40.4 Multi-Threading</a>
+ </li></ul>
+ <li><a name="toc_Changes" href="#Changes">41 Changes</a>
+ <ul>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e5_002e1">41.1 3DLDF 1.1.5.1</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e5">41.2 3DLDF 1.1.5</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4_002e2">41.3 3DLDF 1.1.4.2</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4_002e1">41.4 3DLDF 1.1.4.1</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4">41.5 3DLDF 1.1.4</a>
+ <li><a href="#Initial-version">41.6 3DLDF 1.1.1</a>
+ </li></ul>
+ <li><a name="toc_Bibliography" href="#Bibliography">Bibliography</a>
+ <li><a name="toc_GNU-Free-Documentation-License" href="#GNU-Free-Documentation-License">Appendix A GNU Free Documentation License</a>
+ <li><a name="toc_Data-Type-and-Variable-Index" href="#Data-Type-and-Variable-Index">Data Type and Variable Index</a>
+ <li><a name="toc_Function-Index" href="#Function-Index">Function Index</a>
+ <li><a name="toc_Concept-Index" href="#Concept-Index">Concept Index</a>
+ </li></ul>
+ </div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Top"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Introduction">Introduction</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#dir">(dir)</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#dir">(dir)</a>
+ 
+ </div>
+ 
+    <p>This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for
+ 3DLDF 1.1.5.1.<br>  This manual was last updated on
+ 16 January 2004.<br>
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output. 
+ The author is Laurence D. Finston.
+ 
+    <p>Copyright &copy; 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation
+ 
+    <blockquote>
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.2
+ or any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+ Texts.  A copy of the license is included in the section entitled
+ &ldquo;GNU Free Documentation License&rdquo;. 
+ </blockquote>
+ 
+    <p>Please note that the figures cannot be shown in the Info output
+ format.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Introduction">Introduction</a>
+ <li><a accesskey="2" href="#Contributing-to-3DLDF">Contributing to 3DLDF</a>
+ <li><a accesskey="3" href="#Using-3DLDF">Using 3DLDF</a>
+ <li><a accesskey="4" href="#Points">Points</a>
+ <li><a accesskey="5" href="#Transforming-Points">Transforming Points</a>
+ <li><a accesskey="6" href="#Transforms">Transforms</a>
+ <li><a accesskey="7" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ <li><a accesskey="8" href="#Paths">Paths</a>
+ <li><a accesskey="9" href="#Plane-Figures">Plane Figures</a>
+ <li><a href="#Solid-Figures">Solid Figures</a>
+ <li><a href="#Pictures">Pictures</a>
+ <li><a href="#Intersections">Intersections</a>
+ <li><a href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ <li><a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>
+ <li><a href="#Global-Constants-and-Variables">Global Constants and Variables</a>
+ <li><a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>
+ <li><a href="#System-Information">System Information</a>
+ <li><a href="#Color-Reference">Color Reference</a>
+ <li><a href="#Input-and-Output">Input and Output</a>
+ <li><a href="#Shape-Reference">Shape Reference</a>
+ <li><a href="#Transform-Reference">Transform Reference</a>
+ <li><a href="#Label-Reference">Label Reference</a>
+ <li><a href="#Picture-Reference">Picture Reference</a>
+ <li><a href="#Point-Reference">Point Reference</a>
+ <li><a href="#Focus-Reference">Focus Reference</a>
+ <li><a href="#Line-Reference">Line Reference</a>
+ <li><a href="#Plane-Reference">Plane Reference</a>
+ <li><a href="#Path-Reference">Path Reference</a>
+ <li><a href="#Polygon-Reference">Polygon Reference</a>
+ <li><a href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ <li><a href="#Rectangle-Reference">Rectangle Reference</a>
+ <li><a href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ <li><a href="#Ellipse-Reference">Ellipse Reference</a>
+ <li><a href="#Circle-Reference">Circle Reference</a>
+ <li><a href="#Pattern-Reference">Pattern Reference</a>
+ <li><a href="#Solid-Reference">Solid Reference</a>
+ <li><a href="#Faced-Solid-Reference">Faced Solid Reference</a>
+ <li><a href="#Cuboid-Reference">Cuboid Reference</a>
+ <li><a href="#Polyhedron-Reference">Polyhedron Reference</a>
+ <li><a href="#Utility-Functions">Utility Functions</a>
+ <li><a href="#Adding-a-File">Adding a File</a>
+ <li><a href="#Future-Plans">Future Plans</a>
+ <li><a href="#Changes">Changes</a>
+ <li><a href="#Bibliography">Bibliography</a>
+ <li><a href="#GNU-Free-Documentation-License">GNU Free Documentation License</a>
+ <li><a href="#Data-Type-and-Variable-Index">Data Type and Variable Index</a>
+ <li><a href="#Function-Index">Function Index</a>
+ <li><a href="#Concept-Index">Concept Index</a>
+ 
+ </li></ul>
+ <p>Introduction
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Sources-of-Information">Sources of Information</a>
+ <li><a href="#About-This-Manual">About This Manual</a>
+ <li><a href="#CWEB-Documentation">CWEB Documentation</a>
+ <li><a href="#Metafont-and-MetaPost">Metafont and MetaPost</a>
+ <li><a href="#Caveats">Caveats</a>
+ <li><a href="#Ports">Ports</a>
+ 
+ </li></ul>
+ <p>About This Manual
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Manual-Conventions">Manual Conventions</a>
+ <li><a href="#Illustrations">Illustrations</a>
+ 
+ </li></ul>
+ <p>Caveats
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Accuracy">Accuracy</a>
+ <li><a href="#No-Input-Routine">No Input Routine</a>
+ 
+ </li></ul>
+ <p>Points
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>
+ <li><a href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>
+ <li><a href="#Shifting-Points">Shifting Points</a>
+ <li><a href="#Scaling-Points">Scaling Points</a>
+ <li><a href="#Shearing-Points">Shearing Points</a>
+ <li><a href="#Rotating-Points">Rotating Points</a>
+ 
+ </li></ul>
+ <p>Transforms
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>
+ <li><a href="#Inverting-Transforms">Inverting Transforms</a>
+ 
+ </li></ul>
+ <p>Drawing and Labeling Points
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Drawing-Points-Intro">Drawing Points Intro</a>
+ <li><a href="#Labeling-Points-Intro">Labeling Points Intro</a>
+ 
+ </li></ul>
+ <p>Paths
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>
+ <li><a href="#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>
+ 
+ </li></ul>
+ <p>Plane Figures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Regular-Polygons-Getstart">Regular Polygons Getstart</a>
+ <li><a href="#Rectangles-Getstart">Rectangles Getstart</a>
+ <li><a href="#Ellipses-Getstart">Ellipses Getstart</a>
+ <li><a href="#Circles-Getstart">Circles Getstart</a>
+ 
+ </li></ul>
+ <p>Solid Figures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Cuboid-Getstart">Cuboid Getstart</a>
+ <li><a href="#Polyhedron-Getstart">Polyhedron Getstart</a>
+ 
+ </li></ul>
+ <p>Polyhedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Tetrahedron-Getstart">Tetrahedron Getstart</a>
+ <li><a href="#Dodecahedron-Getstart">Dodecahedron Getstart</a>
+ <li><a href="#Icosahedron-Getstart">Icosahedron Getstart</a>
+ 
+ </li></ul>
+ <p>Pictures
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Projections">Projections</a>
+ <li><a href="#Focuses-Getstart">Focuses Getstart</a>
+ <li><a href="#Surface-Hiding">Surface Hiding</a>
+ 
+ </li></ul>
+ <p>Projections
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Parallel-Projections">Parallel Projections</a>
+ <li><a href="#The-Perspective-Projection">The Perspective Projection</a>
+ 
+ </li></ul>
+ <p>Installing and Running 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Installing-3DLDF">Installing 3DLDF</a>
+ <li><a href="#Running-3DLDF">Running 3DLDF</a>
+ 
+ </li></ul>
+ <p>Installing 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Template-Functions">Template Functions</a>
+ 
+ </li></ul>
+ <p>Running 3DLDF
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Converting-EPS-Files">Converting EPS Files</a>
+ <li><a href="#Command-Line-Arguments">Command Line Arguments</a>
+ 
+ </li></ul>
+ <p>Converting EPS Files
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a>
+ 
+ </li></ul>
+ <p>System Information
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Endianness">Endianness</a>
+ <li><a href="#Register-Width">Register Width</a>
+ <li><a href="#Get-Second-Largest-Real">Get Second Largest Real</a>
+ 
+ </li></ul>
+ <p>Color Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Color-Data-Members">Color Data Members</a>
+ <li><a href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>
+ <li><a href="#Color-Operators">Color Operators</a>
+ <li><a href="#Modifying-Colors">Modifying Colors</a>
+ <li><a href="#Showing-Colors">Showing Colors</a>
+ <li><a href="#Querying-Colors">Querying Colors</a>
+ <li><a href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>
+ <li><a href="#Namespace-Colors">Namespace Colors</a>
+ 
+ </li></ul>
+ <p>Input and Output
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#I_002fO-Global-Variables">I/O Global Variables</a>
+ <li><a href="#I_002fO-Functions">I/O Functions</a>
+ 
+ </li></ul>
+ <p>Shape Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Shape-Data-Members">Shape Data Members</a>
+ <li><a href="#Shape-Operators">Shape Operators</a>
+ <li><a href="#Copying-Shapes">Copying Shapes</a>
+ <li><a href="#Modifying-Shapes">Modifying Shapes</a>
+ <li><a href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>
+ <li><a href="#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>
+ <li><a href="#Clearing-Shapes">Clearing Shapes</a>
+ <li><a href="#Querying-Shapes">Querying Shapes</a>
+ <li><a href="#Showing-Shapes">Showing Shapes</a>
+ <li><a href="#Outputting-Shapes">Outputting Shapes</a>
+ 
+ </li></ul>
+ <p>Transform Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Transform-Data-Members">Transform Data Members</a>
+ <li><a href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>
+ <li><a href="#Transform-Constructors">Transform Constructors </a>
+ <li><a href="#Transform-Operators">Transform Operators</a>
+ <li><a href="#Matrix-Inversion">Matrix Inversion</a>
+ <li><a href="#Setting-Values-Transforms">Setting Values Transforms</a>
+ <li><a href="#Querying-Transforms">Querying Transforms</a>
+ <li><a href="#Returning-Information-for-Transforms">Returning Information for Transforms</a>
+ <li><a href="#Showing-Transforms">Showing Transforms</a>
+ <li><a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>
+ <li><a href="#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>
+ <li><a href="#Resetting-Transforms">Resetting Transforms</a>
+ <li><a href="#Cleaning-Transforms">Cleaning Transforms</a>
+ 
+ </li></ul>
+ <p>Label Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Label-Data-Members">Label Data Members</a>
+ <li><a href="#Copying-Labels">Copying Labels</a>
+ <li><a href="#Outputting-Labels">Outputting Labels</a>
+ 
+ </li></ul>
+ <p>Picture Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Picture-Data-Members">Picture Data Members</a>
+ <li><a href="#Picture-Global-Variables">Picture Global Variables</a>
+ <li><a href="#Picture-Constructors">Picture Constructors</a>
+ <li><a href="#Picture-Operators">Picture Operators</a>
+ <li><a href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>
+ <li><a href="#Modifying-Pictures">Modifying Pictures</a>
+ <li><a href="#Showing-Pictures">Showing Pictures</a>
+ <li><a href="#Outputting-Pictures">Outputting Pictures</a>
+ 
+ </li></ul>
+ <p>Outputting
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <li><a href="#Picture-Output-Functions">Picture Output Functions</a>
+ 
+ </li></ul>
+ <p>Namespaces
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Namespace-Projections">Namespace Projections</a>
+ <li><a href="#Namespace-Sorting">Namespace Sorting</a>
+ 
+ </li></ul>
+ <p>Point Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Point-Data-Members">Point Data Members</a>
+ <li><a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>
+ <li><a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>
+ <li><a href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>
+ <li><a href="#Point-Destructor">Point Destructor</a>
+ <li><a href="#Point-Operators">Point Operators</a>
+ <li><a href="#Copying-Points">Copying Points</a>
+ <li><a href="#Querying-Points">Querying Points</a>
+ <li><a href="#Returning-Coordinates">Returning Coordinates</a>
+ <li><a href="#Returning-Information-for-Points">Returning Information for Points</a>
+ <li><a href="#Modifying-Points">Modifying Points</a>
+ <li><a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a>
+ <li><a href="#Applying-Transformations-to-Points">Applying Transformations to Points</a>
+ <li><a href="#Projecting-Points">Projecting Points</a>
+ <li><a href="#Vector-Operations">Vector Operations</a>
+ <li><a href="#Points-and-Lines">Points and Lines</a>
+ <li><a href="#Point-Intersections">Point Intersections</a>
+ <li><a href="#Point-Drawing-Functions">Point Drawing Functions</a>
+ <li><a href="#Labelling-Points">Labelling Points</a>
+ <li><a href="#Showing-Points">Showing Points</a>
+ <li><a href="#Outputting-Points">Outputting Points</a>
+ 
+ </li></ul>
+ <p>Focus Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Focus-Data-Members">Focus Data Members</a>
+ <li><a href="#Focus-Global-Variables">Focus Global Variables</a>
+ <li><a href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>
+ <li><a href="#Focus-Operators">Focus Operators</a>
+ <li><a href="#Modifying-Focuses">Modifying Focuses</a>
+ <li><a href="#Querying-Focuses">Querying Focuses</a>
+ <li><a href="#Showing-Focuses">Showing Focuses</a>
+ 
+ </li></ul>
+ <p>Line Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Line-Data-Members">Line Data Members</a>
+ <li><a href="#Line-Global-Constants">Line Global Constants</a>
+ <li><a href="#Line-Constructors">Line Constructors</a>
+ <li><a href="#Line-Operators">Line Operators</a>
+ <li><a href="#Get-Path">Get Path</a>
+ <li><a href="#Showing">Showing</a>
+ 
+ </li></ul>
+ <p>Plane Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Planes-Data-Members">Planes Data Members</a>
+ <li><a href="#Planes-Global-Constants">Planes Global Constants</a>
+ <li><a href="#Planes-Constructors">Planes Constructors</a>
+ <li><a href="#Planes-Operators">Planes Operators</a>
+ <li><a href="#Planes-Returning-Information">Planes Returning Information</a>
+ <li><a href="#Plane-Intersections">Plane Intersections</a>
+ <li><a href="#Planes-Showing">Planes Showing</a>
+ 
+ </li></ul>
+ <p>Path Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Path-Data-Members">Path Data Members</a>
+ <li><a href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>
+ <li><a href="#Path-Destructor">Path Destructor</a>
+ <li><a href="#Path-Operators">Path Operators</a>
+ <li><a href="#Appending-to-Paths">Appending to Paths </a>
+ <li><a href="#Copying-Paths">Copying Paths</a>
+ <li><a href="#Clearing-Paths">Clearing Paths </a>
+ <li><a href="#Modifying-Paths">Modifying Paths </a>
+ <li><a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>
+ <li><a href="#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>
+ <li><a href="#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>
+ <li><a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>
+ <li><a href="#Labelling-Paths">Labelling Paths</a>
+ <li><a href="#Showing-Paths">Showing Paths</a>
+ <li><a href="#Querying-Paths">Querying Paths</a>
+ <li><a href="#Outputting-Paths">Outputting Paths</a>
+ <li><a href="#Path-Intersections">Path Intersections</a>
+ 
+ </li></ul>
+ <p>Polygon Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Polygon-Data-Members">Polygon Data Members</a>
+ <li><a href="#Polygon-Operators">Polygon Operators</a>
+ <li><a href="#Querying-Polygons">Querying Polygons</a>
+ <li><a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>
+ <li><a href="#Polygon-Intersections">Polygon Intersections</a>
+ 
+ </li></ul>
+ <p>Regular Polygon Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>
+ <li><a href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>
+ <li><a href="#Regular-Polygon-Operators">Regular Polygon Operators</a>
+ <li><a href="#Querying-Regular-Polygons">Querying Regular Polygons</a>
+ <li><a href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>
+ 
+ </li></ul>
+ <p>Rectangle Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Rectangle-Data-Members">Rectangle Data Members</a>
+ <li><a href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>
+ <li><a href="#Rectangle-Operators">Rectangle Operators</a>
+ <li><a href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>
+ <li><a href="#Querying-Rectangles">Querying Rectangles</a>
+ <li><a href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a>
+ 
+ </li></ul>
+ <p>Regular Closed Plane Curve Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>
+ <li><a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>
+ <li><a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>
+ <li><a href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>
+ 
+ </li></ul>
+ <p>Ellipse Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Ellipse-Data-Members">Ellipse Data Members</a>
+ <li><a href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>
+ <li><a href="#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>
+ <li><a href="#Ellipse-Operators">Ellipse Operators</a>
+ <li><a href="#Labeling-Ellipses">Labeling Ellipses</a>
+ <li><a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>
+ <li><a href="#Querying-Ellipses">Querying Ellipses</a>
+ <li><a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>
+ <li><a href="#Ellipse-Intersections">Ellipse Intersections</a>
+ <li><a href="#Solving-Ellipses">Solving Ellipses</a>
+ <li><a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a>
+ 
+ </li></ul>
+ <p>Circle Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Circle-Data-Members">Circle Data Members</a>
+ <li><a href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>
+ <li><a href="#Circle-Operators">Circle Operators</a>
+ <li><a href="#Querying-Circles">Querying Circles</a>
+ <li><a href="#Circle-Intersections">Circle Intersections</a>
+ 
+ </li></ul>
+ <p>Pattern Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Plane-Tesselations">Plane Tesselations</a>
+ <li><a href="#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ 
+ </li></ul>
+ <p>Roulettes and Involutes
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Epicycloids">Epicycloids</a>
+ 
+ </li></ul>
+ <p>Solid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Solid-Data-Members">Solid Data Members</a>
+ <li><a href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>
+ <li><a href="#Solid-Destructor">Solid Destructor</a>
+ <li><a href="#Solid-Operators">Solid Operators</a>
+ <li><a href="#Copying-Solids">Copying Solids</a>
+ <li><a href="#Setting-Solid-Members">Setting Solid Members</a>
+ <li><a href="#Querying-Solids">Querying Solids</a>
+ <li><a href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <li><a href="#Showing-Solids">Showing Solids</a>
+ <li><a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>
+ <li><a href="#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>
+ <li><a href="#Outputting-Solids">Outputting Solids</a>
+ <li><a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>
+ <li><a href="#Clearing-Solids">Clearing Solids</a>
+ 
+ </li></ul>
+ <p>Returning Elements and Information
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>
+ <li><a href="#Getting-Shapes-Solids">Getting Shapes Solids</a>
+ 
+ </li></ul>
+ <p>Faced Solid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a>
+ 
+ </li></ul>
+ <p>Cuboid Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Cuboid-Data-Members">Cuboid Data Members</a>
+ <li><a href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>
+ <li><a href="#Cuboid-Operators">Cuboid Operators</a>
+ 
+ </li></ul>
+ <p>Polyhedron Reference
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Polyhedron-Data-Members">Polyhedron Data Members</a>
+ <li><a href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <li><a href="#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ 
+ </li></ul>
+ <p>Regular Platonic Polyhedra
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Tetrahedron">Tetrahedron</a>
+ <li><a href="#Dodecahedron">Dodecahedron</a>
+ <li><a href="#Icosahedron">Icosahedron</a>
+ 
+ </li></ul>
+ <p>Tetrahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Tetrahedron-Data-Members">Tetrahedron Data Members</a>
+ <li><a href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>
+ <li><a href="#Tetrahedron-Net">Tetrahedron Net</a>
+ 
+ </li></ul>
+ <p>Dodecahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Dodecahedron-Data-Members">Dodecahedron Data Members</a>
+ <li><a href="#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>
+ <li><a href="#Dodecahedron-Net">Dodecahedron Net</a>
+ 
+ </li></ul>
+ <p>Icosahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Icosahedron-Data-Members">Icosahedron Data Members</a>
+ <li><a href="#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>
+ <li><a href="#Icosahedron-Net">Icosahedron Net</a>
+ 
+ </li></ul>
+ <p>Semi-Regular Archimedean Polyhedra
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Truncated-Octahedron">Truncated Octahedron</a>
+ 
+ </li></ul>
+ <p>Truncated Octahedron
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>
+ <li><a href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>
+ <li><a href="#Truncated-Octahedron-Net">Truncated Octahedron Net</a>
+ 
+ </li></ul>
+ <p>Utility Functions
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Perspective-Functions">Perspective Functions</a>
+ 
+ </li></ul>
+ <p>Future Plans
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Geometry">Geometry</a>
+ <li><a href="#Curves-and-Surfaces">Curves and Surfaces</a>
+ <li><a href="#Shadows">Shadows</a>
+ <li><a href="#Multi_002dThreading">Multi-Threading</a>
+ 
+ </li></ul>
+ <p>Changes
+ 
+ </p>
+ <ul class="menu">
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>
+ <li><a href="#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>
+ <li><a href="#Initial-version">Initial version</a>
+ 
+    </ul>
+ 
+ <!-- UBAR is only used in code written to examples.web.  There's no need -->
+ <!-- for versions for it for Info or HTML.  LDF 2003.12.07. -->
+ <!-- Kludge!  This won't work for 1 degree in the Info version! -->
+ <!-- LDF 2003.11.25. -->
+ <!-- %% \OCB and \CCB are used in \BGRP and \EGRP (begin group and end group) -->
+ <!-- %% for writing curly braces to the file of 3DLDF example code. -->
+ <!-- Calling this `@TIMES' caused problems.  Maybe the name wasn't the -->
+ <!-- reason, though.  But I don't feel like experimenting to find out. -->
+ <!-- LDF 2003.12.08. -->
+ <!-- ``By'' for matrices. -->
+ <!-- intro.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Introduction"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Contributing-to-3DLDF">Contributing to 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Top">Top</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">1 Introduction</h2>
+ 
+ <p>3DLDF is a free software package for three-dimensional drawing written by
+ Laurence D. Finston, who is also the author of this manual. 
+ It is written in C++
+  using CWEB and it outputs MetaPost code.
+ 
+    <p>3DLDF is a GNU package. 
+ It is part of the GNU Project of the
+ Free Software Foundation
+ and is published under the GNU General Public License. 
+ See the website <a href="http://www.gnu.org">http://www.gnu.org</a> for more
+ information. 
+ 3DLDF is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/3dldf">http://ftp.gnu.org/gnu/3dldf</a>. 
+ The official 3DLDF website is
+ <a href="http://www.gnu.org/software/3dldf">http://www.gnu.org/software/3dldf</a>. 
+ More information about 3DLDF can be found at the author's website:
+ <a href="http://wwwuser.gwdg.de/~lfinsto1">http://wwwuser.gwdg.de/~lfinsto1</a>.
+ 
+    <p>Please send bug reports to:
+ 
+ <pre class="display">     <a href="mailto:bug-3DLDF@gnu.org">bug-3DLDF@gnu.org</a> and
+ </pre>
+    <!-- Not currently listing DANTE as a site for downloading. -->
+ <!-- LDF 2003.11.20. -->
+ <!-- @uref{http://www.dante.de/software/ctan/, the Dante www-server} -->
+    <p>Two other mailing lists may be of interest to users of 3DLDF:
+ <a href="mailto:help-3DLDF@gnu.org">help-3DLDF@gnu.org</a> is for people to ask other
+ users for help and <a href="mailto:info-3DLDF@gnu.org">info-3DLDF@gnu.org</a> is for sending
+ announcements to users.  To subscribe, send an email to the
+ appropriate mailing list or lists with the word "subscribe" as the
+ subject. 
+ The author's website is <a href="http://wwwuser.gwdg.de/~lfinsto1">http://wwwuser.gwdg.de/~lfinsto1</a>.
+ 
+    <p>My primary purpose in writing 3DLDF was to make it possible to use
+ MetaPost for three-dimensional drawing.  I've always enjoyed using MetaPost,
+ and thought it was a shame that I could only use it for making
+ two-dimensional drawings.  3DLDF is a front-end that operates on
+ three-dimensional data, performs the necessary calculations for the
+ projection onto two dimensions, and writes its output in the form of
+ MetaPost code.
+ 
+    <p>While 3DLDF's data types and operations are modelled on those of
+ Metafont and MetaPost, and while the only form of output 3DLDF currently
+ produces is MetaPost code, it is nonetheless not in principle tied to
+ MetaPost.  It could be modified to produce PostScript code directly, or
+ output in other formats.  It would also be possible to modify 3DLDF so
+ that it could be used for creating graphics interactively on a terminal,
+ by means of an appropriate interface to the computer's graphics
+ hardware.
+ 
+    <p>The name  &ldquo;3DLDF&rdquo; (&ldquo;3D&rdquo;  plus the  author's initials)  was
+ chosen because,  while not  pretty, it's  unlikely to conflict
+ with any of the other programs called &ldquo;3D&rdquo;-something.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Sources-of-Information">Sources of Information</a>
+ <li><a accesskey="2" href="#About-This-Manual">About This Manual</a>
+ <li><a accesskey="3" href="#CWEB-Documentation">CWEB Documentation</a>
+ <li><a accesskey="4" href="#Metafont-and-MetaPost">Metafont and MetaPost</a>
+ <li><a accesskey="5" href="#Caveats">Caveats</a>
+ <li><a accesskey="6" href="#Ports">Ports</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Sources-of-Information"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#About-This-Manual">About This Manual</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Introduction">Introduction</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.1 Sources of Information</h3>
+ 
+ <p>This handbook, and the use of 3DLDF itself, presuppose at least some
+ familiarity on the part of the reader with Metafont, MetaPost,
+ CWEB, and C++
+ .  If you are not familiar with any or all of them, I
+ recommend the following sources of information:
+ 
+    <pre class="sp">
+ 
+ </pre>
+ 
+ Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>. 
+ Computers and Typesetting; C. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>A User's Manual for MetaPost</i>. 
+ AT &amp; T Bell Laboratories. 
+ Murray Hill, NJ. No date.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. and Silvio Levy. 
+ <i>The </i><b>CWEB</b><i> System of Structured Documentation</i>. 
+ Version&nbsp;3.64&mdash;February&nbsp;2002.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The C++
+  Programming Language</i>. 
+ Special Edition. 
+ Reading, Massachusetts 2000. 
+ Addison-Wesley. 
+ ISBN&nbsp;0-201-70073-5.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+    <p><a name="index-CTAN-_0028Comprehensive-_0040TeX_007b_007d-Archive-Network_0029-1"></a><a name="index-Comprehensive-_0040TeX_007b_007d-Archive-Network-_0028CTAN_0029-2"></a>The manuals for MetaPost and CWEB are available from the Comprehensive
+ TeX Archive Network (CTAN).  See one of the following web sites for
+ more information:
+ 
+      <dl>
+ <dt>Germany<dd><a href="http://dante.ctan.org">http://dante.ctan.org</a>, <a href="http://ftp.dante.de">http://ftp.dante.de</a><br>
+ <a href="http://www.dante.de">http://www.dante.de</a>.
+ 
+      <br><dt>United Kingdom<dd><a href="http://www.cam.ctan.org">http://www.cam.ctan.org</a><br>
+ <a href="http://ftp.tex.ac.uk">http://ftp.tex.ac.uk</a>.
+ 
+      <br><dt>USA<dd><a href="http://www.tug.ctan.org">http://www.tug.ctan.org</a><br>
+ <a href="http://www.ctan.tug.org">http://www.ctan.tug.org</a>. 
+ </dl>
+ 
+ <div class="node">
+ <a name="About-This-Manual"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#CWEB-Documentation">CWEB Documentation</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Sources-of-Information">Sources of Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.2 About This Manual</h3>
+ 
+ <p>This manual has been created using
+ Texinfo, a documentation system which is part of the GNU Project, whose
+ main sponsor is the Free Software Foundation. 
+ Texinfo can be used to generate online and printed documentation from
+ the same input files.
+ 
+    <p>For more information about Texinfo, see:
+ 
+    <pre class="sp">
+ 
+ </pre>
+ 
+ Stallmann, Richard M. and Robert J. Chassell. 
+ <i>Texinfo.  The GNU Documentation Format</i>. 
+ The Free Software Foundation. Boston 1999.
+    <pre class="sp">
+ 
+ </pre>
+ 
+    <p>For more information about the GNU Project and the Free Software
+ Foundation, see the following web site: <a href="http://www.gnu.org">http://www.gnu.org</a>.
+ 
+    <p>The edition of this manual is
+ 1.1.5.1 and it documents version 1.1.5.1 of 3DLDF. 
+ The edition number of the manual and the version number of the program
+ are the same (as of 16 January 2004),
+ but may diverge at a later date.
+ 
+    <p>Note that &ldquo;I&rdquo;, &ldquo;me&rdquo;, etc., in this manual refers to
+ Laurence D. Finston, so far the sole author of
+ both 3DLDF and this manual.  &ldquo;Currently&rdquo; and similar formulations
+ refer to version 1.1.5.1 of 3DLDF as of
+ 16 January 2004.
+ 
+    <p>This manual is intended for both beginning and advanced users of 3DLDF. 
+ So, if there's something you don't understand, it's probably best to
+ skip it and come back to it later. 
+ Some of the more difficult points, or ones that presuppose familiarity
+ with features not yet described, are in the footnotes. 
+ <!-- Others are in -->
+ <!-- paragraphs marked by a ``dangerous bend'' sign, familiar from -->
+ <!-- @cite{The @TeX{}book} and  @cite{The Metafont{}book}, which I've -->
+ <!-- borrowed from Prof.@: Knuth: -->
+ <!-- @tex -->
+ <!-- \vrule height 14pt depth 8pt width 0pt\raise5pt\hbox{\dbend} -->
+ <!-- @end tex -->
+ 
+    <p>I firmly believe that an adequate program with good documentation is
+ more useful than a great program with poor or no documentation.  The
+ ideal case, of course, is a great program with great documentation.  I'm
+ sorry to say, that this manual is not yet as good as I'd like it to be. 
+ I apologize for the number of typos and other errors.  I hope they don't
+ detract too much from its usefulness.  I would have liked to have
+ proofread and corrected it again before publication, but for reasons
+ external to 3DLDF, it is necessary for me to publish now.  I plan to set
+ up an errata list on
+ <a href="http://www.gnu.org/software/3dldf">the official 3DLDF website</a>,
+ and/or
+ <a href="http://wwwuser.gwdg.de/~lfinsto1">my own website</a>.
+ 
+    <p>Unless I've left anything out by mistake, this manual documents all of
+ the data types, constants and variables, namespaces, and functions
+ defined in 3DLDF.  However, some of the descriptions are terser than I
+ would like, and I'd like to have more examples and illustrations. There
+ is also more to be said on a number of topics touched on in this
+ manual, and some topics I haven't touched on at all.  In general, while
+ I've tried to give complete information on the &ldquo;what and how&rdquo;, the
+ &ldquo;why and wherefore&rdquo; has sometimes gotten short shrift. 
+ I hope to correct these defects in future editions.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Manual-Conventions">Manual Conventions</a>
+ <li><a accesskey="2" href="#Illustrations">Illustrations</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Manual-Conventions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Illustrations">Illustrations</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#About-This-Manual">About This Manual</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#About-This-Manual">About This Manual</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">1.2.1 Conventions</h4>
+ 
+ <p>Data types are formatted like this:  <code>int</code>,
+ <code>Point</code>, <code>Path</code>.  Plurals are formatted in the same way:
+ <code>ints</code>, <code>Points</code>, <code>Paths</code>.  It is poor
+ typographical practice to typeset a single word using more than one
+ font, e.g., <code>int</code>s, <code>Point</code>s, <code>Path</code>s.  This applies to
+ data types whose plurals do not end in &ldquo;s&rdquo; as well, e.g.,
+ the plural of the C++
+  <code>class Polyhedron</code> is <code>Polyhedra</code>.
+ 
+    <p>When C++
+  functions are discussed in this manual, I always include a
+ pair
+ of parentheses to make it clear that the item in question is a function
+ and not a variable, but I generally do not
+ include the arguments.  For example, if I mention the
+ function
+ <code>foo()</code>, this doesn't imply that <code>foo()</code> takes no
+ arguments.  If it were appropriate, I would include the argument type:
+ 
+ <pre class="example">     foo(int)
+ </pre>
+    <p class="noindent">or the argument type and a placeholder name:
+ 
+ <pre class="example">     foo(int arg)
+ </pre>
+    <p class="noindent">or I would write
+ 
+ <pre class="example">     foo(void)
+ </pre>
+    <p><a name="index-member-function-3"></a><a name="index-function_002c-member-4"></a>to indicate that <code>foo()</code> takes no arguments.  Also, I
+ generally don't indicate the return type, unless it is relevant.  If it
+ is a member function
+ of a class, I may indicate this,
+ e.g.,, <code>bar_class::foo()</code>, or not,
+ depending on whether this information is relevant.  This convention
+ differs from that used in the <a href="#Function-Index">Function Index</a>, which is generated
+ automatically by Texinfo.  There, only the name of the function appears,
+ without parentheses, parameters, or return values.  The class type
+ of member functions may appear in the Function Index, (e.g.,
+ <code>bar_class::foo</code>), but only in index entries that have been entered
+ explicitly by the author;  such entries are not generated by Texinfo
+ automatically.
+ 
+    <p>Examples are formatted as follows:
+ 
+ <pre class="example">     Point p0(1, 2, 3);
+      Point p1(5, 6, 7.9);
+      Path pa(p0, p1);
+      p0.show("p0:");
+      -| p0: (1, 2, 3)
+ </pre>
+    <p>The beautiful mathematical typesetting produced by TeX
+ unfortunately does not appear in the Info and HTML versions of this
+ manual.  In these, the following symbols are used to replace the proper
+ mathematical symbols.
+ 
+      <dl>
+ <dt>^<dd>Precedes a superscript.  For example, read &lsquo;<samp><span class="samp">a^2</span></samp>&rsquo; as
+ &ldquo;a squared&rdquo;.
+ 
+      <br><dt>_<dd>Precedes a subscript.  For example, read &lsquo;<samp><span class="samp">x_1</span></samp>&rsquo; as
+ &ldquo;x sub one&rdquo;.
+ 
+      <br><dt>*<dd>Multiplication.  For example, read &lsquo;<samp><span class="samp">x * y</span></samp>&rsquo; as
+ &ldquo;x times y&rdquo;.
+ 
+      <br><dt>sqrt()<dd>The square root function.  For example, read &lsquo;<samp><span class="samp">sqrt(x)</span></samp>&rsquo; as
+ &ldquo;the square root of x&rdquo;. 
+ </dl>
+ 
+    <p>In addition, examples
+ can contain the following symbols:
+ 
+      <dl>
+ <dt>-|<dd>Indicates output to the terminal when 3DLDF is
+ run.
+ 
+      <br><dt>&rArr;<dd>Indicates a result of some sort.  It may precede a illustration
+ generated by the code in the example.
+ 
+      <br><dt>error--&gt;<dd>Indicates that the following text is an error message. 
+ </dl>
+ 
+    <p>This manual does not use all of the symbols provided by Texinfo.  If you
+ find a symbol you don't understand in this manual (which shouldn't
+ happen), see page 103 of the Texinfo manual.
+ 
+    <p><a name="index-symbols-5"></a>
+    <pre class="sp">
+ 
+ </pre>
+ Symbols:
+      <dl>
+ <dt>N
+ <dd>The set of the natural numbers
+ {0, 1, 2, 3, 4, <small class="dots">...</small>}
+ 
+      <br><dt>I
+ <dd>The set of the integers
+ {<small class="dots">...</small>, -3, -2, -1, 0, 1, 2, 3, 4, <small class="dots">...</small>}
+ 
+      <br><dt>R
+ <dd>The set of the real numbers. 
+ </dl>
+ 
+ <div class="node">
+ <a name="Illustrations"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Manual-Conventions">Manual Conventions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#About-This-Manual">About This Manual</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">1.2.2 Illustrations</h4>
+ 
+ <p>The illustrations in this manual have been created using 3DLDF.  The
+ code that generates them is in the Texinfo files themselves, that
+ contain the text of the manual.  Texinfo is based on TeX, so it's
+ possible to make use of the latter's facility for writing ASCII text to
+ files using TeX's <code>\write</code> command.
+ 
+    <p>The file <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> contains the
+ C++
+  code, and the file <samp><span class="file">3DLDF-1.1.5.1/CWEB/examples.mp</span></samp>
+ contains the MetaPost code for generating the illustrations. 
+ 3DLDF was built using GCC 2.95 when the illustrations were generated. 
+ For some reason, GCC 3.3 has difficulty with them.  It works to generate
+ them in batches of about 50 with GCC 3.3.
+ 
+    <p><a name="index-PNG-_0028Portable-Network-Graphics_0029-6"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-7"></a><a name="index-PS-_0028PostScript_0029-8"></a><a name="index-PostScript-_0028PS_0029-9"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-10"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-11"></a>MetaPost outputs Encapsulated PostScript files.  These can be included
+ in TeX files, as explained below.  However, in order to display the
+ illustrations in the HTML version of this manual, I had to convert them
+ to <a href="http://www.libpng.org/pub/png/index.html">PNG (&ldquo;Portable Network Graphics&rdquo;) format</a>. 
+ See <a href="#Converting-EPS-Files">Converting EPS Files</a>, for instructions on how to do this.
+ 
+    <p>Please note that the illustrations cannot be shown in the Info output
+ format!
+ 
+    <p>If you have problems including the illustrations in the printed version,
+ for example, if your
+ installation doesn't have <samp><span class="command">dvips</span></samp>, look for the following lines
+ in <samp><span class="file">3DLDF.texi</span></samp>:
+ 
+ <pre class="example">     \doepsftrue    %% One of these two lines should be commented-out.
+      %\doepsffalse
+ </pre>
+    <p class="noindent">Now, remove the &lsquo;<samp><span class="samp">%</span></samp>&rsquo; from in front of &lsquo;<samp><span class="samp">\doepsffalse</span></samp>&rsquo; and put
+ one in front of &lsquo;<samp><span class="samp">\doepsftrue</span></samp>&rsquo;.  This will prevent the illustrations
+ from being included.  This should only be done as a last resort,
+ however, because it will make it difficult if
+ not impossible to understand this manual.
+ 
+    <p>The C++
+  code in an example is not always the complete code used to
+ create the illustration that follows it, since the latter may be
+ cluttered with commands that would detract from the clarity of the
+ example.  The actual code used always follows the example in the Texinfo
+ source file, so the latter may be referred to, if the reader wishes
+ to see exactly what code was used to generate the illustration.
+ 
+    <p>You may want to skip the following paragraphs in this section, if you're
+ reading this manual for the
+ first time.  Don't worry if you don't understand it, it's meaning should
+ become clear after reading the manual and some experience with
+ using 3DLDF.
+ 
+    <p>The file <samp><span class="file">3DLDF.texi</span></samp> in the directory
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO</span></samp>, the driver file for this manual, contains
+ the following TeX code:
+ 
+ <pre class="example">     \newif\ifmakeexamples
+      \makeexamplestrue     %% One of these two lines should be commented-out.
+      %\makeexamplesfalse
+ </pre>
+    <p class="noindent">When <samp><span class="command">texi2dvi</span></samp> is run on <samp><span class="file">3DLDF.texi</span></samp>,
+ <code>\makeexamplestrue</code> is not commented-out, and
+ <code>\makeexamplesfalse</code> is,
+ the C++
+  code for the illustrations is written to the file
+ <samp><span class="file">examples.web</span></samp>. 
+ If the EPS files don't already exist (in the directory
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/EPS</span></samp>),
+ the TeX macro <code>\PEX</code>,
+ which includes them in the Texinfo files, will signal an error each time
+ it can't find one.  Just type &lsquo;<samp><span class="samp">s</span></samp>&rsquo; at the command line to tell
+ TeX to keep going. 
+ If you want to be sure that these are indeed the only errors, you can
+ type &lsquo;<samp><span class="samp">&lt;RETURN&gt;</span></samp>&rsquo; after each one instead.
+ 
+    <p><samp><span class="command">texi2dvi 3DLDF.texi</span></samp> also generates the file
+ <samp><span class="file">extext.tex</span></samp>, which contains TeX code for including the
+ illustrations by themselves.
+ 
+    <p><samp><span class="file">examples.web</span></samp> must now be moved to <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> and
+ ctangled, <samp><span class="file">examples.c</span></samp> must compiled,
+ and 3DLDF must be relinked.  <samp><span class="command">ctangle examples</span></samp> also generates
+ the header file <samp><span class="file">example.h</span></samp>, which is included
+ in <samp><span class="file">main.web</span></samp>.  Therefore, if the contents of <samp><span class="file">examples.h</span></samp> have
+ changed since the last time <samp><span class="file">main.web</span></samp> was ctangled,
+ <samp><span class="file">main.web</span></samp> will have to be ctangled, and <samp><span class="file">main.c</span></samp> recompiled,
+ before <samp><span class="file">3dldf</span></samp> is relinked.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>
+ 
+    <p>Running <samp><span class="command">3dldf</span></samp> and MetaPost now
+ generates the EPS (Encapsulated PostScript) files
+ <samp><span class="file">3DLDFmp.1</span></samp> through (currently) <samp><span class="file">3DLDFmp.199</span></samp>
+ for the illustrations.  They must be moved to
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/EPS</span></samp>. 
+ Now, when <samp><span class="command">texi2dvi 3DLDF.texi</span></samp> is run again, the
+ <samp><span class="command">dvips</span></samp> command
+ &lsquo;<samp><span class="samp">\epsffile</span></samp>&rsquo; includes the EPS files for the illustrations in the
+ manual.  <samp><span class="file">3DLDF.texi</span></samp> includes the line &lsquo;<samp><span class="samp">\input epsf</span></samp>&rsquo;, so
+ that &lsquo;<samp><span class="samp">\epsffile</span></samp>&rsquo; works. 
+ Of course, <samp><span class="command">dvips</span></samp> (or some other program that does the
+ job) must be used to convert <samp><span class="file">3DLDF.dvi</span></samp> to  a PostScript file. 
+ To see exactly how this is done, take a look at the
+ <samp><span class="file">.texi</span></samp> source files of this manual.<a rel="footnote" href="#fn-2" name="fnd-2"><sup>2</sup></a>
+ 
+    <p>In the <samp><span class="file">3DLDF.texi</span></samp> belonging to the 3DLDF distribution,
+ <code>\makeexamplestrue</code> will be commented-out, and
+ <code>makeexamplesfalse</code> won't be, because the EPS files for the
+ illustrations are included in the distribution.
+ 
+    <p>The version of <samp><span class="file">examples.web</span></samp> in <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp> merely
+ includes the files <samp><span class="file">subex1.web</span></samp> and <samp><span class="file">subex2.web</span></samp>. 
+ If you rename <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> to <samp><span class="file">examples.web</span></samp>,
+ you can generate the illustrations.
+ 
+ <div class="node">
+ <a name="CWEB-Documentation"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Metafont-and-MetaPost">Metafont and MetaPost</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#About-This-Manual">About This Manual</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.3 CWEB Documentation</h3>
+ 
+ <p>As mentioned above, 3DLDF has been programmed using CWEB, which is a
+ &ldquo;literate programming&rdquo; tool developed by
+ Donald E. Knuth and Silvio Levy.  See <a href="#Sources-of-Information">Sources of Information</a>, for a
+ reference to the CWEB manual. 
+ Knuth's <cite>TeX&mdash;The Program</cite> and
+ <cite>Metafont&mdash;The Program</cite> both include a section
+ &ldquo;How to read a WEB&rdquo; (pp. x&ndash;xv, in both volumes).
+ 
+    <p>CWEB files combine source code
+ and documentation.  Running <samp><span class="command">ctangle</span></samp> on a CWEB file,
+ for example, <samp><span class="file">main.web</span></samp>, produces the file <samp><span class="file">main.c</span></samp> containing
+ C or C++
+  code.  Running <samp><span class="command">cweave main.web</span></samp> creates a
+ TeX file with pretty-printed source code and nicely formatted
+ documentation.  I find that using CWEB makes it more natural to
+ document my code as I write it, and makes the source files easier to
+ read when editing them.  It does have certain consequences
+ with regard to compilation, but these are taken care of by <samp><span class="command">make</span></samp>. 
+ See <a href="#Adding-a-File">Adding a File</a>, and <a href="#Changes">Changes</a>, for more
+ information.
+ 
+    <p>The CWEB files in the directory <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> contain the
+ source code for 3DLDF.  The file <samp><span class="file">3DLDFprg.web</span></samp> in this directory
+ is only ever used for cweaving;  it is never ctangled and contains no
+ C++
+  code for compilation.  It does, however, include all of the other
+ CWEB files, so that <samp><span class="command">cweave 3DLDFprg.web</span></samp> generates the TeX file
+ containing the complete documentation of the source code of 3DLDF.
+ 
+    <p>The files <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.tex</span></samp>,
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.dvi</span></samp>, and
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/3DLDFprg.ps</span></samp> are
+ included in the distribution of 3DLDF as a
+ convenience.  However, users may generate them themselves, should there
+ be some reason for doing so, by entering <samp><span class="command">make ps</span></samp>
+ from the command line of a shell from the working
+ directory <samp><span class="file">3DLDF-1.1.5.1/</span></samp> or <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>. 
+ Alternatively, the user may generate them
+ by hand from the working directory <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp> in the
+ following way:
+ 
+      <ol type=1 start=1>
+ <li><samp><span class="command">cweave 3DLDFprg.web</span></samp>
+ generates <samp><span class="file">3DLDFprg.tex</span></samp>.
+ 
+      <li><samp><span class="command">tex 3DLDFprg</span></samp> or <samp><span class="command">tex 3DLDFprg.tex</span></samp> generates
+ <samp><span class="file">3DLDFprg.dvi</span></samp>.
+ 
+      <li><samp><span class="command">dvips -o 3DLDFprg.ps 3DLDFprg</span></samp> (possibly with additional options)
+ generates <samp><span class="file">3DLDFprg.ps</span></samp>.
+ 
+      <li><samp><span class="command">lpr -P&lt;</span><em>print queue</em><span class="command">&gt; 3DLDFprg.ps</span></samp>
+ sends <samp><span class="file">3DLDFprg.ps</span></samp> to a printer, on a UNIX or UNIX-like system.
+         </ol>
+ 
+    <p>The individual commands may differ, depending on the system you're
+ using.
+ 
+ <div class="node">
+ <a name="Metafont-and-MetaPost"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Caveats">Caveats</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#CWEB-Documentation">CWEB Documentation</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.4 Metafont and MetaPost</h3>
+ 
+ <p><a name="index-Metafont-12"></a>Metafont is  a system created by Donald E. Knuth for generating fonts,
+ in particular for use with TeX, his well-known
+ typsetting system.<a rel="footnote" href="#fn-3" name="fnd-3"><sup>3</sup></a>
+ Expressed in a
+ somewhat simplified way,  Metafont is a system for programming
+ curves, which  are then  digitized and  output in  the form of
+ run-time encoded bitmaps. (See Knuth's <cite>The Metafontbook</cite> for more
+ information).
+ 
+    <p><a name="index-MetaPost-13"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-14"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-15"></a>John D. Hobby  modified  Metafont's  source  code  to  create
+ MetaPost, which  functions in  much the same way, but outputs
+ encapsulated PostScript (EPS) files instead of bitmaps.  MetaPost is
+ very  useful   for  creating  graphics  and  is  a  convenient
+ interface to  PostScript.   It is also easy both to imbed
+ TeX code  in MetaPost  programs, for instance, for typesetting
+ labels, and  to include  MetaPost  graphics  in  ordinary  TeX
+ files, e.g., by using <samp><span class="command">dvips</span></samp>.<a rel="footnote" href="#fn-4" name="fnd-4"><sup>4</sup></a>
+ Apart from simply printing the PostScript file output by
+ <samp><span class="command">dvips</span></samp>, there are many programs that can process ordinary
+ or encapsulated PostScript files and convert them to other formats. 
+ Just two of the many possibilities are ImageMagick and GIMP, both of
+ which can be used to create animations from MetaPost graphics. 
+ <!-- !! GET REFERENCES TO IMAGEMAGICK AND GIMP!!  Maybe someday I'll do -->
+ <!-- this.  At the moment, I don't feel like looking for any more references. -->
+ 
+    <p>However, MetaPost  inherited  a  significant  limitation  from
+ Metafont:  it's not possible to use it for making
+ three-dimensional graphics, except in a very limited way. 
+ One insuperable problem is the severe limitation on the magnitude
+ of user-defined numerical variables in Metafont and
+ MetaPost.<a rel="footnote" href="#fn-5" name="fnd-5"><sup>5</sup></a>
+ This
+ made  sense for Metafont's and MetaPost's original
+ purposes,  but   they  make   it  impossible  to  perform  the
+ calculations needed for 3D graphics.
+ 
+    <p>Another problem is the data types defined in Metafont:  Points
+ are  represented   as  pairs   of  real   values  and   affine
+ transformations as sets of 6 real values.  This corresponds to
+ the representation of points and affine transformations in the
+ plane as  a two-element  vector on  the one  hand  and  a  six
+ element matrix  on the  other.  While  it  is
+ possible to  work around  the  limitation  imposed  by  having
+ points be  represented by  only two  values, it is
+ impracticable in   the   case   of   the
+ transformations.
+ 
+    <p>For these reasons, I decided to write a program that would behave more
+ or less like Metafont, but with suitable extensions, and the ability to
+ handle three dimensional data;  namely 3DLDF.  It stores the data and
+ performs the transformations and other necessary calculations and is not
+ subject to the limitations of MetaPost and its data types.  Upon output,
+ it performs a perspective transformation, converting the 3D image into a
+ 2D one.  The latter can now be expressed as an ordinary MetaPost
+ program, so 3DLDF writes its output as MetaPost code to a file.
+ 
+    <p>In the following, it may be a little unclear why I sometimes refer to
+ Metafont and sometimes to MetaPost.  The reason is that Metafont
+ inherited much of its functionality from Metafont.  Certain operations
+ in Metafont have no meaning in MetaPost and so have been removed, while
+ MetaPost's function of interfacing with PostScript has caused other
+ operations to be added.  For example, in MetaPost, <code>color</code> is a
+ data type, but not in Metafont.  Unless otherwise stated, when I refer to
+ Metafont, it can be assumed that what I say applies to MetaPost as well. 
+ However, when I refer to MetaPost, it will generally be in connection
+ with features specific to MetaPost.
+ 
+ <div class="node">
+ <a name="Caveats"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ports">Ports</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Metafont-and-MetaPost">Metafont and MetaPost</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.5 Caveats</h3>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Accuracy">Accuracy</a>
+ <li><a accesskey="2" href="#No-Input-Routine">No Input Routine</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Accuracy"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#No-Input-Routine">No Input Routine</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Caveats">Caveats</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Caveats">Caveats</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">1.5.1 Accuracy</h4>
+ 
+ <p>When 3DLDF is run, it uses the three-dimensional data contained in the
+ user code to create a two-dimensional projection. 
+ Currently, this can be a perspective projection, or a parallel
+ projection onto one of the major planes.  MetaPost code representing
+ this projection is then written to the output file. 
+ 3DLDF does no <dfn>scan conversion</dfn>,<a rel="footnote" href="#fn-6" name="fnd-6"><sup>6</sup></a>
+ so all of the curves in the projection are
+ generated by means of the algorithms MetaPost inherited from Metafont. 
+ These algorithms, however, are designed to find the
+ &ldquo;most pleasing curve&rdquo;<a rel="footnote" href="#fn-7" name="fnd-7"><sup>7</sup></a>
+ given one or more two-dimensional points and connectors;  they do not
+ account for the the fact that the two-dimensional points are projections
+ of three-dimensional ones.  This can lead to unsatisfactory results,
+ especially where extreme foreshortening occurs.  In particular,
+ &lsquo;<samp><span class="samp">curl</span></samp>&rsquo;, <code>dir</code>, &lsquo;<samp><span class="samp">tension</span></samp>&rsquo;, and control points should be
+ used cautiously, or avoided altogether, when specifying connectors.
+ 
+    <p>3DLDF operates on
+ the assumption  that, given  an  adequate  number  of  points,
+ MetaPost will produce an adequate approximation to the desired
+ curve <em>in perspective</em>, since the greater the number of
+ points given for a curve, the less &ldquo;choice&rdquo; MetaPost has for
+ the path  through them.   My  experience with 3DLDF bears this
+ out.   Generally, the curves look quite good.  Where problems arise,
+ it usually helps to increase the number of points in a curve.
+ 
+    <p>A more serious problem is the imprecision resulting from the operation
+ of rotation.  Rotations use the trigonometric functions, which return
+ approximate values.  This has the result that points that should have
+ identical coordinate values, sometimes do not. 
+ This has consequences for the functions that compare points. 
+ The more rotations
+ are applied to points, the greater the divergence between their actual
+ coordinate values, and the values they should have.  So far, I haven't
+ found a solution for this problem.  On the other hand, it hasn't
+ yet affected the usability of 3DLDF.
+ 
+ <div class="node">
+ <a name="No-Input-Routine"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Accuracy">Accuracy</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Caveats">Caveats</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">1.5.2 No Input Routine</h4>
+ 
+ <p>3DLDF does not yet include a routine for reading input
+ files.   This means  that user  code must  be written  in C++
+ ,
+ compiled, and  linked with  the rest of the program.  I admit,
+ this is  not ideal, and writing an input routine for user code
+ is one of the next things I plan to add to 3DLDF.
+ 
+    <p>I plan to use Flex and Bison to write the input routine.<a rel="footnote" href="#fn-8" name="fnd-8"><sup>8</sup></a>
+ The syntax of the input code should be as close
+ as possible  to that  of MetaPost, while taking account of the
+ differences between  MetaPost and 3DLDF.
+ 
+    <p>For the present, however, the  use of 3DLDF is limited to
+ those who  feel comfortable  using  C++
+  and compiling  and
+ relinking programs.  Please don't be put off by this!  It's not so
+ difficult, and <samp><span class="command">make</span></samp> does most of the work of recompiling and
+ running 3DLDF.  See <a href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>, for more
+ information.
+ 
+ <div class="node">
+ <a name="Ports"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Caveats">Caveats</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Introduction">Introduction</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.6 Ports</h3>
+ 
+ <p>I originally developed 3DLDF on a DECalpha Personal Workstation with two
+ processors running under the operating system Tru64 Unix 5.1, using the
+ DEC C++
+  compiler. 
+ I then ported it to a PC Pentium 4 running under Linux 2.4, using
+ the GNU C++
+  compiler
+ GCC 2.95.3, and a PC Pentium II XEON under Linux 2.4, using GCC 3.3. 
+ I am currently only maintaining the last version.  I do not believe that
+ it's worthwhile to maintain a version for GCC 2.95.  While I would like
+ 3DLDF to run on as many platforms as possible, I would
+ rather spend my time developing it than porting it. 
+ This is something where I would be grateful for help from other
+ programmers.
+ 
+    <p>Although I am no longer supporting ports to other systems,
+ I have left some conditionally compiled code for
+ managing platform dependencies in the CWEB sources of 3DLDF.  This may
+ make it easier for other people who want to port 3DLDF to other
+ platforms.
+ 
+    <p>Currently, the files <samp><span class="file">io.web</span></samp>, <samp><span class="file">loader.web</span></samp>, <samp><span class="file">main.web</span></samp>,
+ <samp><span class="file">points.web</span></samp>,
+ and  <samp><span class="file">pspglb.web</span></samp> contain conditionally compiled code, depending on
+ which compiler, or in the case of GCC, which version of the compiler, is
+ used.  The DEC C++
+  compiler defines the preprocessor macro
+ &lsquo;<samp><span class="samp">__DECCXX</span></samp>&rsquo; and GCC defines &lsquo;<samp><span class="samp">__GNUC__</span></samp>&rsquo;.  In order to
+ distinguish between GCC 2.95.3 and GCC 3.3, I've added the macros
+ &lsquo;<samp><span class="samp">LDF_GCC_2_95</span></samp>&rsquo; and  &lsquo;<samp><span class="samp">LDF_GCC_3_3</span></samp>&rsquo; in <samp><span class="file">loader.web</span></samp>, which
+ should be defined or undefined, depending on which compiler you're
+ using.  In the distribution,  &lsquo;<samp><span class="samp">LDF_GCC_3_3</span></samp>&rsquo; is defined and
+ &lsquo;<samp><span class="samp">LDF_GCC_2_95</span></samp>&rsquo; is undefined, so if you want to try using GCC 2.95, you'll
+ have to change this (it's not guaranteed to work).
+ 
+    <p>3DLDF 1.1.5.1 now uses Autoconf and Automake, and the
+ <samp><span class="file">configure</span></samp> script generates a <samp><span class="file">config.h</span></samp> file, which is now
+ included in <samp><span class="file">loader.web</span></samp>.  Some of
+ the preprocessor macros defined in <samp><span class="file">config.h</span></samp> are used to
+ conditionally include library header files, but so far, there is no error
+ handling code for the case that a file can't be included.  I hope to improve the
+ way 3DLDF works together with Autoconf and Automake in the near future.
+ 
+    <p>3DLDF 1.1.5 is the first release that contains template functions. 
+ Template instantiation differs from compiler to compiler, so using
+ template functions will tend to make 3DLDF less portable. 
+ See <a href="#Template-Functions">Template Functions</a>, for more information. 
+ I am no longer able to build 3DLDF on the DECalpha Personal Workstation. 
+ I'm fairly sure that it would be possible to port it, but
+ I don't plan to do this, since Tru64 Unix 5.1 and the DEC C++
+ 
+    <p>compiler are non-free software.
+ 
+ <!-- Local Variables: -->
+ <!-- mode:Texinfo -->
+ <!-- eval:(outline-minor-mode) -->
+ <!-- End: -->
+ <!-- contrib.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Contributing-to-3DLDF"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Using-3DLDF">Using 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Introduction">Introduction</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h3 class="section">1.7 Contributing to 3DLDF</h3>
+ 
+ <p>So far, I've been the sole author and user of 3DLDF. 
+ I would be very interested in having other programmers contribute to
+ it.  I would be particularly interested in help in making 3DLDF conform
+ as  closely as possible to the GNU Coding Standards.  I would be
+ grateful if someone would write proper Automake and Autoconf files,
+ since I haven't yet learned how to do so (I'm working on it).
+ 
+    <p>See <a href="#Introduction">Introduction</a>, for information on how to contact the author.
+ 
+ <!-- @c Got rid of getstart.texi, because it confuses Emacs and makeinfo -->
+ <!-- @c to have files nested too deeply. -->
+ <div class="node">
+ <a name="Using-3DLDF"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Points">Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Contributing-to-3DLDF">Contributing to 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapheading">Using 3DLDF</h2>
+ 
+ <p>Since 3DLDF does not yet have an input routine, user code must be
+ written in C++
+  (in <samp><span class="file">main.web</span></samp>, or some other file) and compiled. 
+ Then, 3DLDF must be relinked, together with the new file of object
+ code resulting from the compilation. 
+ For now, the important point is that the text of
+ the examples in this manual represent C++
+  code. 
+ See <a href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>, for more information.
+ 
+ <!-- chapter Points -->
+ <!-- gspoint.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transforming-Points">Transforming Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Using-3DLDF">Using 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">2 Points</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>
+ <li><a accesskey="2" href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Declaring-and-Initializing-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Points">Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Points">Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">2.1 Declaring and Initializing Points</h3>
+ 
+ <p><a name="index-Point-16"></a>The most basic drawable object in 3DLDF is <code>class Point</code>.  It is
+ analogous to <code>pair</code> in Metafont.  For example, in Metafont one
+ can define a <code>pair</code> using the &ldquo;z&rdquo; syntax as
+ follows:
+ 
+ <pre class="example">     z0 = (1cm, 1cm);
+ </pre>
+    <p class="noindent">There are other ways of defining <code>pairs</code> in Metafont (and
+ MetaPost), but this is the usual way.
+ 
+    <p>In 3DLDF, a Point is declared and initialized as follows:
+ 
+ <pre class="example">     Point pt0(1, 2, 3);
+ </pre>
+    <p>This simple example demonstrates several differences between Metafont
+ and 3DLDF.  First of all, there is no analog in 3DLDF to Metafont's
+ &ldquo;z&rdquo; syntax. 
+ If I want to have <code>Points</code> called &ldquo;<code>pt0</code>&rdquo;, &ldquo;<code>pt1</code>&rdquo;,
+ &ldquo;<code>pt2</code>&rdquo;, etc., then I must declare each of them to be a
+ <code>Point</code>:
+ 
+ <pre class="example">     Point pt0(10, 15, 2);
+      Point pt1(13, 41, 5.5);
+      Point pt2(62.9, 7.02, 8);
+ </pre>
+    <p>Alternatively, I could declare an array of <code>Points</code>:
+ 
+ <pre class="example">     Point pt[3];
+ </pre>
+    <p class="noindent">Now I can refer to <code>pt[0]</code>, <code>pt[1]</code>, and <code>pt[2]</code>.
+ 
+ <p class="noindent"><a name="index-Point_003a_003ameasurement_005funits-17"></a><a name="index-measurement_005funits-_0028Point_0029-18"></a><a name="index-measurement-units-19"></a><a name="index-units-of-measurement-20"></a><a name="index-input-routine-21"></a>In the Metafont example, the x and y-coordinates of the <code>pair z0</code>
+ are specified using the unit of measurement, in this case, centimeters. 
+ This is currently not possible in 3DLDF.  The current unit of
+ measurement is stored in the static variable <code>Point::measurement_units</code>,
+ which is a <code>string</code>.  Its default value is <code>"cm"</code> for
+ &ldquo;centimeters&rdquo;. 
+ At present, it is best to stick with one unit of measurement for a
+ drawing. 
+ After I've defined an input routine, 3DLDF should handle
+ units of measurement in the same way that Metafont does.
+ 
+    <p><a name="index-Point_003a_003aworld_005fcoordinates-22"></a><a name="index-Point_003a_003auser_005fcoordinates-23"></a><a name="index-Point_003a_003aview_005fcoordinates-24"></a><a name="index-Point_003a_003aprojective_005fcoordinates-25"></a><a name="index-world_005fcoordinates-_0028Point_0029-26"></a><a name="index-user_005fcoordinates-_0028Point_0029-27"></a><a name="index-view_005fcoordinates-_0028Point_0029-28"></a><a name="index-projective_005fcoordinates-_0028Point_0029-29"></a>Another difference is that the <code>Points</code> <code>pt0</code>, <code>pt1</code>, and
+ <code>pt2</code> have three coordinates, x, y, and z, whereas <code>z0</code> has
+ only two, x and y.  Actually, the difference goes deeper than this.  In
+ Metafont, a <code>pair</code> has two parts, <code>xpart</code> and <code>ypart</code>,
+ which can be examined by the user.  In 3DLDF, a <code>Point</code> contains
+ the following sets of coordinates:
+ 
+ <pre class="example">     world_coordinates
+      user_coordinates
+      view_coordinates
+      projective_coordinates
+ </pre>
+    <p class="noindent">These are sets of 3-dimensional <dfn>homogeneous</dfn> coordinates, which
+ means that they contain four coordinates: x, y, z, and w.  Homogeneous
+ coordinates are used in the affine and perspective transformations
+ (see <a href="#Transforms">Transforms</a>).
+ 
+    <p>Currently, only <code>world_coordinates</code> and
+ <code>projective_coordinates</code> are used in 3DLDF. 
+ The <code>world_coordinates</code> refer to the position of a <code>Point</code> in
+ 3DLDF's basic, unchanging coordinate system. 
+ The <code>projective_coordinates</code> are the coordinates of the
+ two-dimensional projection of the <code>Point</code> onto a plane. 
+ This projection is what is ultimately printed out or displayed on the
+ computer screen.  Please note, that when the coordinates of a
+ <code>Point</code> are referred to in this manual, the
+ <code>world_coordinates</code> are meant, unless otherwise stated.
+ 
+    <p><code>Points</code> can be declared and their values can be set in different
+ ways.
+ 
+ <pre class="example">     Point pt0;
+      Point pt1(1);
+      Point pt2(2.3, 52);
+      Point pt3(4.5, 7, 13.205);
+ </pre>
+    <p><code>pt0</code> is declared without any arguments, i.e., using the default
+ constructor, so the values of its x, y, and
+ z-coordinates are all 0.
+ 
+    <p><code>pt1</code> is declared and initialized with one argument for the x-coordinate,
+ so its y and z-coordinates are initialized with the values of
+ <code>CURR_Y</code> and <code>CURR_Z</code> respectively. 
+ The latter are static constant data members
+ of class <code>Point</code>, whose values are 0 by default.  They can be reset
+ by the user, who should
+ make sure that they have sensible values.
+ 
+    <p><code>pt2</code> is declared and initialized with two arguments for its x and
+ y-coordinates, so its z-coordinate is initialized to the value of
+ <code>CURR_Z</code>.  Finally, <code>pt3</code> has an argument for each of its
+ coordinates.
+ 
+    <p>Please note that <code>pt0</code> is constructed using a the default
+ constructor, whereas the other <code>Points</code> are constructed using a
+ constructor with one required argument (for the x-coordinate), and two
+ optional arguments (for the y and z-coordinates).  The default
+ constructor always sets all the coordinates to 0, irrespective of the
+ values of <code>CURR_Y</code> and <code>CURR_Z</code>.
+ 
+ <div class="node">
+ <a name="Setting-and-Assigning-to-Points"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Points">Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">2.2 Setting and Assigning to Points</h3>
+ 
+ <p><a name="index-Point_003a_003aoperator_003d-30"></a><a name="index-operator_003d-_0028for-Points_0029-31"></a><a name="index-Point_003a_003aset-32"></a><a name="index-set-_0028for-Points_0029-33"></a>It is possible to change the value of the coordinates of <code>Points</code>
+ by using the <dfn>assignment operator</dfn> <code>=</code>
+ (<code>Point::operator=()</code>) or the function <code>Point::set()</code>
+ (with appropriate arguments):
+ 
+ <pre class="example">     Point pt0(2, 3.3, 7);
+      Point pt1;
+      pt1 = pt0;
+      pt0.set(34, 99, 107.5);
+      pt0.show("pt0:");
+      -| pt0: (34, 99, 107.5)
+      pt1.show("pt1:");
+      -| pt1: (2, 3.3, 7)
+ </pre>
+    <p>In this example, <code>pt0</code> is initialized with the coordinates <code>(2, 3.3, 7)</code>,
+ and <code>pt1</code> with the coordinates <code>(0, 0, 0)</code>. 
+ <code>pt1 = pt0</code> causes <code>pt1</code> to have the same coordinates as
+ <code>pt0</code>, then the coordinates of <code>pt0</code> are changed to <code>(34,
+ 99, 107.5)</code>. This doesn't affect <code>pt1</code>, whose coordinates remain
+ <code>(2, 3.3, 7)</code>.
+ 
+    <p>Another way of declaring and initializing <code>Points</code> is by using the
+ <dfn>copy constructor</dfn>:
+ 
+ <pre class="example">     Point pt0(1, 3.5, 19);
+      Point pt1(pt0);
+      Point pt2 = pt0;
+      Point pt3;
+      pt3 = pt0;
+ </pre>
+    <p>In this example, <code>pt1</code> and <code>pt2</code> are both declared and
+ initialized using the copy constructor;  <code>Point pt2 = pt0</code> does not
+ invoke the assignment operator.  <code>pt3</code>, on the other hand, is
+ declared using the default constructor, and not initialized.  In the
+ following line, <code>pt3 = pt0</code> does invoke the assignment operator,
+ thus resetting the coordinate values of <code>pt3</code> to those of
+ <code>pt0</code>.
+ 
+ <!-- chapter Transforming Points -->
+ <!-- gstranpt.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Transforming-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transforms">Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Points">Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">3 Transforming Points</h2>
+ 
+ <p><code>Points</code> don't always have to remain in the same place.  There are
+ various ways of moving or <em>transforming</em> them:
+      <ul>
+ <li>Shifting.  This is often called &ldquo;translating&rdquo;, but the operation in Metafont
+ that performs translation is called <code>shift</code>, so I call it &ldquo;shifting&rdquo;.
+ 
+      <li>Scaling.
+ 
+      <li>Shearing.
+ 
+      <li>Rotating about an axis.
+ 
+    </ul>
+ 
+    <p><code>class Point</code> has several member functions
+ for applying these <dfn>affine transformations</dfn><a rel="footnote" href="#fn-9" name="fnd-9"><sup>9</sup></a>
+ to a <code>Point</code>. 
+ Most of the arguments to these functions are of
+ type <code>real</code>.  As you may know, there is no such data type in C++
+ . 
+ I have defined <code>real</code> using <code>typedef</code> to be either
+ <code>float</code> or <code>double</code>, depending on the value of a preprocessor
+ switch for conditional compilation.<a rel="footnote" href="#fn-10" name="fnd-10"><sup>10</sup></a>
+ 3DLDF uses many <code>real</code> values and I wanted to be able to
+ change the precision used by making one change (in the file
+ <samp><span class="file">pspglb.web</span></samp>) rather than having to examine all the places in the
+ program where <code>float</code> or <code>double</code> are used.  Unfortunately,
+ setting <code>real</code> to <code>double</code> currently doesn't work.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Shifting-Points">Shifting Points</a>
+ <li><a accesskey="2" href="#Scaling-Points">Scaling Points</a>
+ <li><a accesskey="3" href="#Shearing-Points">Shearing Points</a>
+ <li><a accesskey="4" href="#Rotating-Points">Rotating Points</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Shifting-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Scaling-Points">Scaling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transforming-Points">Transforming Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforming-Points">Transforming Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">3.1 Shifting</h3>
+ 
+ <p>The function
+ <code>shift()</code>
+ adds its arguments to the corresponding
+ <code>world_coordinates</code> of a <code>Point</code>.  In the following example,
+ the function <code>show()</code> is used to print the <code>world_coordinates</code>
+ of <code>p0</code> to standard output.
+ 
+ <pre class="example">     Point p0(0, 0, 0);
+      p0.shift(1, 2, 3);
+      p0.show("p0:");
+      -| p0: (1, 2, 3)
+      p0.shift(10);
+      p0.show("p0:");
+      -| p0: (11, 2, 3)
+      p0.shift(0, 20);
+      p0.show("p0:");
+      -| p0: (11, 22, 3)
+      p0.shift(0, 0, 30);
+      p0.show("p0:");
+      -| p0: (11, 22, 33)
+ </pre>
+    <p class="noindent"><code>shift</code> takes three <code>real</code> arguments, whereby the second and
+ third are optional.  To shift a <code>Point</code> in the direction of
+ the positive or negative y-axis, and/or the positive or negative z-axis
+ only, then a 0 argument for the
+ x direction, and possibly one for the y direction
+ must be used as placeholders, as in the example above.
+ 
+    <p><code>shift()</code> can be invoked with a <code>Point</code> argument
+ instead of <code>real</code> arguments.  In this case, the x, y, and
+ z-coordinates of the argument are used for shifting the <code>Point</code>:
+ 
+ <pre class="example">     Point a(10, 10, 10);
+      Point b(1, 2, 3);
+      a.shift(b);
+      a.show("a:")
+      -| a: (11, 12, 13)
+ </pre>
+    <p>Another way of shifting <code>Points</code> is to use the binary <code>+=</code>
+ operator (<code>Point::operator+=()</code>)  with a <code>Point</code>
+ argument.
+ 
+ <pre class="example">     Point a0(1, 1, 1);
+      Point a1(2, 2, 2);
+      a0 += a1;
+      a0.show("a0:");
+      -| a0: (3, 3, 3)
+ </pre>
+    <div class="node">
+ <a name="Scaling-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Shearing-Points">Shearing Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shifting-Points">Shifting Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforming-Points">Transforming Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">3.2 Scaling</h3>
+ 
+ <p>The function <code>scale()</code> takes three <code>real</code> arguments. 
+ The x, y, and z-coordinates of the <code>Point</code> are
+ multiplied by the first, second, and third arguments respectively.  Only
+ the first argument is required;  the default for the others is 1.
+ 
+    <p>If one wants to perform scaling in either the y-dimension only, or the y
+ and z-dimensions only, a dummy argument of 1 must be passed for
+ scaling in the x-dimension.  Similarly, if one wants to perform scaling
+ in the z-dimension only, dummy arguments of 1 must be passed for scaling
+ in the x and y-dimensions.
+ 
+ <pre class="example">     Point p0(1, 2, 3);
+      p0.scale(2, 3, 4);
+      p0.show("p0:");
+      -| p0: (2, 6, 12)
+      p0.scale(2);
+      p0.show("p0:");
+      -| p0: (4, 6, 12)
+      p0.scale(1, 3);
+      p0.show("p0:");
+      -| p0: (4, 18, 12)
+      p0.scale(1, 1, 3);
+      p0.show("p0:");
+      -| p0: (4, 18, 36)
+ </pre>
+    <div class="node">
+ <a name="Shearing-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rotating-Points">Rotating Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Scaling-Points">Scaling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforming-Points">Transforming Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">3.3 Shearing</h3>
+ 
+ <p>Shearing is more complicated than shifting or scaling.  The function
+ <code>shear()</code> takes six <code>real</code> arguments. 
+ If p is a <code>Point</code>, then <code>p.shear(a, b, c, d, e, f)</code> sets
+ x_p to x_p + ay_p + bz_p, y_p to
+ y_p + cx_p + dz_p, and
+ z_p to z_p + ex_p + fy_p. 
+ In this way, each coordinate of a <code>Point</code> is modified based on the
+ values of the other two coordinates, whereby the influence of the
+ other coordinates on the new value is weighted according to the
+ arguments.
+ 
+ <pre class="example">     Point p(1, 1, 1);
+      p.shear(1);
+      p.show("p:");
+      -| p: (2, 1, 1)
+      p.set(1, 1, 1);
+      p.shear(1, 1);
+      p.show("p:");
+      -| p: (3, 1, 1)
+      p.set(1, 1, 1);
+      p.shear(1, 1, 2, 2, 3, 3);
+      p.show("p:");
+      -| p: (3, 5, 7)
+ </pre>
+    <!-- I've copied the following example from -->
+ <!-- the node ``Affine Transformations for Points''. -->
+    <p>[next figure]
+  demonstrates the effect of shearing the points of a rectangle
+ in the x-y plane.
+ 
+ <pre class="example">     Point P0;
+      Point P1(3);
+      Point P2(3, 3);
+      Point P3(0, 3);
+      Rectangle r(p0, p1, p2, p3);
+      r.draw();
+      Rectangle q(r);
+      q.shear(1.5);
+      q.draw(black, "evenly");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF1.png"
+ alt="[Figure 1. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 1. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Rotating-Points"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shearing-Points">Shearing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforming-Points">Transforming Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">3.4 Rotating</h3>
+ 
+ <!-- !! TO DO:  Make illustration. -->
+ <p>The function <code>rotate()</code> rotates a <code>Point</code> about one or more of
+ the main axes. 
+ It takes three <code>real</code> arguments, specifying the
+ angles of rotation in degrees about the x, y, and z-axes respectively. 
+ Only the first argument is required, the other two are 0 by default.  If
+ rotation about the y-axis, or the y and z-axes only are required, then 0
+ must be used as a placeholder for the first and possibly the second
+ argument.
+ 
+ <pre class="example">     Point p(0, 1);
+      p.rotate(90);
+      p.show("p:");
+      -| p: (0, 0, -1)
+      p.rotate(0, 90);
+      p.show("p:");
+      -| p: (1, 0, 0)
+      p.rotate(0, 0, 90);
+      p.show("p:");
+      -| p: (0, 1, 0)
+ </pre>
+    <p>The rotations are performed successively about the
+ x, y, and z-axes.  However, rotation is not a commutative
+ operation, so if rotation about the main axes in a different
+ order is required, then <code>rotate()</code> must be invoked more than once:
+ 
+ <pre class="example">     Point A(2, 3, 4);
+      Point B(A);
+      A.rotate(30, 60, 90);
+      A.show("A:");
+      -| A: (-4.59808, -0.700962, 2.7141)
+      B.rotate(0, 0, 90);
+      B.rotate(0, 60);
+      B.rotate(30);
+      B.show("B:");
+      -| B: (-4.9641, 1.43301, -1.51795)
+ </pre>
+    <p>Rotation need not be about the main axes;  it can also be performed
+ about a line defined by two <code>Points</code>.  The function <code>rotate()</code>
+ with two <code>Point</code> arguments and a <code>real</code> argument for the
+ angle of rotation (in degrees) about the axis.  The <code>real</code> argument
+ is optional, with
+ 180 degrees
+ 
+    <p>as the default.
+ 
+ <!-- !! TO DO:  Simplify this example.  How did I get the original values -->
+ <!-- for @code{p0} and @code{p1}? -->
+ <!-- Make illustration larger, put values in illustration. -->
+ <pre class="example">     Point p0 (-1.06066, 0, 1.06066);
+      Point p1 (1.06066, 0, -1.06066);
+      p1 *= p0.rotate(0, 30, 30);
+      p0.show("p0:");
+      -| p0: (-1.25477, -0.724444, 0.388228)
+      p1.show("p1:");
+      -| p1: (1.25477, 0.724444, -0.388228)
+      p0.draw(p1);
+      Point p2(1.06066, 0, 1.06066);
+      p2.show("p2:");
+      -| p2: (1.06066, 0, 1.06066)
+      Point p3(p2);
+      p3.rotate(p1, p0, 45);
+      p3.show("p3:");
+      -| p3 (1.09721, 1.15036, 1.17879)
+      Point p4(p2);
+      p4.rotate(p1, p0, 90);
+      p4.show("p4:");
+      -| p4: (0.882625, 2.05122, 0.485242)
+      Point p5(p2);
+      p5.rotate(p1, p0, 135);
+      p5.show("p5:");
+      -| p5: (0.542606, 2.17488, -0.613716)
+      Point p6(p2);
+      p6.rotate(p1, p0);
+      p6.show("p6:");
+      -| p6: (0.276332, 1.44889, -1.47433)
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF2.png"
+ alt="[Figure 2. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 2. 
+ <br>
+ </p>
+ 
+    <p><a name="index-bugs-34"></a>I have sometimes gotten erroneous results using <code>rotate()</code> for
+ rotation about two <code>Points</code>.  It's usually worked to reverse the
+ order of the <code>Point</code> arguments, or to change sign of the angle
+ argument.  I think I've fixed the problem, though.
+ 
+ <!-- chapter Transforms -->
+ <!-- gstransf.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transforming-Points">Transforming Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">4 Transforms</h2>
+ 
+ <p><a name="index-Transform-35"></a>When <code>Points</code> are transformed using <code>shift()</code>, <code>shear()</code>,
+ or one of the other transformation functions, the
+ <code>world_coordinates</code> are not modified directly.  Instead,
+ another data member of <code>class Point</code> is used to store the
+ information about the transformation, namely <code>transform</code> of
+ type <code>class Transform</code>.  A <code>Transform</code> object has a single
+ data element of type <code>Matrix</code> and a number of member functions.  A
+ <code>Matrix</code> is
+ simply a
+ 4 X 4
+ array<a rel="footnote" href="#fn-11" name="fnd-11"><sup>11</sup></a>
+ of <code>reals</code>
+ defined using <code>typedef real Matrix[4][4]</code>. 
+ Such a matrix suffices for performing all
+ of the transformations (affine and perspective) possible in
+ three-dimensional space.<a rel="footnote" href="#fn-12" name="fnd-12"><sup>12</sup></a>
+ Any combination of transformations can be represented by a single
+ transformation matrix.  This means that consecutive transformations
+ of a <code>Point</code> can be &ldquo;saved up&rdquo; and applied to its coordinates
+ all at once when needed, rather than updating them for each
+ transformation.
+ 
+    <p><a name="index-homogeneous-coordinates-36"></a><code>Transforms</code> work by performing matrix multiplication of
+ <code>Matrix</code> with the homogeneous <code>world_coordinates</code> of
+ <code>Points</code>. 
+ If a set of homogeneous coordinates
+ \alpha = (x, y, z, w)
+ and
+ <pre class="display">     <code>Matrix M</code> =
+      a e i m
+      b f j n
+      c g k o
+      d h l p
+ </pre>
+    <p>then the set of homogeneous coordinates \beta resulting from
+ multiplying \alpha and M is calculated as follows:
+ <pre class="display">     \beta = \alpha\times M = ((xa + yb + zc + wd),  (xe + yf + zg + wh),
+      (xi + yj + zk + wl), (xm + yn + zo + wp))
+ </pre>
+    <p>Please note that each coordinate of \beta can be influenced by all of the
+ coordinates of \alpha.
+ 
+    <p>Operations on
+ matrices are very important in computer graphics applications and are
+ described in many books about computer graphics and geometry.  For
+ 3DLDF, I've mostly used Huw Jones'
+ <cite>Computer Graphics through Key Mathematics</cite>
+ and David Salomon's <cite>Computer Graphics and Geometric Modeling</cite>.
+ 
+    <p><a name="index-Transform-37"></a>It is often useful to declare and use <code>Transform</code> objects in 3DLDF,
+ just as it is for <code>transforms</code> in Metafont.  Transformations can be
+ stored in <code>Transforms</code> and then be used to transform <code>Points</code>
+ by means of <code>Point::operator*=(const Transform&amp;)</code>.
+ 
+ <pre class="example">     <span class="roman">1.</span> Transform t;
+      <span class="roman">2.</span> t.shift(0, 1);
+      <span class="roman">3.</span> Point p(1, 0, 0);
+      <span class="roman">4.</span> p *= t;
+      <span class="roman">5.</span> p.show("p:");
+      -| p: (1, 1, 0)
+ </pre>
+    <p><a name="index-identity-matrix-38"></a><a name="index-matrix_002c-identity-39"></a><a name="index-matrix-operations-40"></a><a name="index-operations_002c-matrix-41"></a>When a <code>Transform</code> is declared (line 1), it is
+ initialized to an <dfn>identity matrix</dfn>.  All identity matrices are
+ square, all of the elements of the main diagonal (upper left to lower
+ right) are 1, and all of the other elements are 0. 
+ So a
+ 4 X 4
+ identity matrix, as used in 3DLDF, looks like this:
+ <pre class="display">     1 0 0 0
+      0 1 0 0
+      0 0 1 0
+      0 0 0 1
+ </pre>
+    <p>If a matrix A is multiplied with an identity matrix I, the result is
+ identical to A, i.e.,
+ A * I = A. 
+ This is the salient property of an identity matrix.
+ 
+    <p>The same affine transformations are applied in the same way to
+ <code>Transforms</code> as they are to <code>Points</code>, i.e., the functions
+ <code>scale()</code>, <code>shift()</code>,
+ <code>shear()</code>, and <code>rotate()</code>
+ correspond to the <code>Point</code>
+ versions of these functions, and they take the same arguments:
+ 
+ <pre class="example">     Point p;
+      Transform t;
+      p.shift(3, 4, 5);
+      t.shift(3, 4, 5);
+      &rArr; p.transform == t
+      p.show_transform("p:");
+      -| p:
+         Transform:
+               0   0.707   0.707       0
+          -0.866   0.354  -0.354       0
+            -0.5  -0.612   0.612       0
+               0       0       0       1
+      t.show("t:");
+      -| t:
+               0   0.707   0.707       0
+          -0.866   0.354  -0.354       0
+            -0.5  -0.612   0.612       0
+               0       0       0       1
+      
+ </pre>
+    <ul class="menu">
+ <li><a accesskey="1" href="#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>
+ <li><a accesskey="2" href="#Inverting-Transforms">Inverting Transforms</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Applying-Transforms-to-Points-Intro"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Inverting-Transforms">Inverting Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transforms">Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforms">Transforms</a>
+ 
+ </div>
+ 
+ <h3 class="section">4.1 Applying Transforms to Points</h3>
+ 
+ <p>A <code>Transform</code> t is applied to a
+ <code>Point</code> P using the binary <code>*=</code> operation
+ (<code>Point::operator*=(const Transform&amp;)</code>)
+ which performs matrix multiplication of <code>P.transform</code> by <code>t</code>. 
+ See <a href="#Point-Operators">Point Reference; Operators</a>.
+ 
+ <pre class="example">     Point P(0, 1);
+      Transform t;
+      t.rotate(90);
+      t.show("t:");
+      -| t:
+         1       0       0       0
+         0       0      -1       0
+         0       1       0       0
+         0       0       0       1
+      P *= t;
+      P.show_transform("P:");
+      -| P:
+      Transform:
+         1       0       0       0
+         0       0      -1       0
+         0       1       0       0
+         0       0       0       1
+      P.show("P:");
+      -| P: (0, 0, -1)
+ </pre>
+    <p>In the example above, there is no real need to use a <code>Transform</code>,
+ since <code>P.rotate(90)</code> could  have been called directly. 
+ As constructions become more complex, the power of <code>Transforms</code>
+ becomes clear:
+ 
+ <!-- !! TO DO: Maybe make @code{Points} the same to begin with. -->
+ <!-- LDF 2003.08.15. -->
+ <pre class="example">     <span class="roman">1.</span> Point p0(0, 0, 0);
+      <span class="roman">2.</span> Point p1(10, 5, 10);
+      <span class="roman">3.</span> Point p2(16, 14, 32);
+      <span class="roman">4.</span> Point p3(25, 50, 99);
+      <span class="roman">5.</span> Point p4(12, 6, 88);
+      <span class="roman">6.</span> Transform a;
+      <span class="roman">7.</span> a.shift(2, 3, 4);
+      <span class="roman">8.</span> a.scale(1, 3, 1);
+      <span class="roman">9.</span> p2 *= p3 *= a;
+      <span class="roman">10.</span> a.rotate(p0, p1, 75);
+      <span class="roman">11.</span> p4 *= a;
+      <span class="roman">12.</span> p2.show("p2:");
+         -| p2: (18, 51, 36)
+      <span class="roman">13.</span> p3.show("p3:");
+         -| p3: (27, 159, 103)
+      <span class="roman">14.</span> p4.show("p4:");
+         -| p4: (24.4647, -46.2869, 81.5353)
+ </pre>
+    <!-- !!  TO DO: If I change the example above, I may have to change this -->
+ <!-- paragraph.  LDF 2003.08.15. -->
+    <p>In this example, a is shifted and scaled, and a is applied
+ to both in line 9.  This works, because
+ the binary operation
+ <code>operator*=(const Transform&amp; t)</code> returns <var>t</var>,
+ making it possible to chain invocations of <code>*=</code>. 
+ Following this, a is rotated
+ 75 degrees
+ 
+    <p>about the line through p_0 and p_1. 
+ Finally, all three transformations, which are stored in a, are
+ applied to p_4.
+ 
+ <div class="node">
+ <a name="Inverting-Transforms"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Applying-Transforms-to-Points-Intro">Applying Transforms to Points Intro</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transforms">Transforms</a>
+ 
+ </div>
+ 
+ <h3 class="section">4.2 Inverting Transforms</h3>
+ 
+ <p><a name="index-matrix-inversion-42"></a><a name="index-inversion-43"></a><dfn>Inversion</dfn> is another operation that can be performed on
+ <code>Transforms</code>.  This makes it possible to reverse the effect of a
+ <code>Transform</code>, which may represent multiple transformations.
+ 
+ <pre class="example">     Point p;
+      Transform t;
+      t.shift(1, 2, 3);
+      t.scale(2, 3, 4);
+      t.rotate(45, 45, 30);
+      t.show("t:");
+      -| t:
+         1.22   0.707    1.41       0
+        0.238    2.59    -1.5       0
+        -3.15    1.45       2       0
+        -7.74    10.2    4.41       1
+      p *= t;
+      p.show("p:");
+      -| p: (-7.74, 10.2, 4.41)
+      Transform u;
+      u = t.inverse();
+      u.show("u:");
+      -| u:
+        0.306  0.0265  -0.197 2.85e-09
+        0.177   0.287  0.0906 -1.12e-09
+        0.354  -0.167   0.125       0
+           -1      -2      -3       1
+      p *= u;
+      p.show("p:");
+      -| p: (0, 0, 0)
+      u *= t;
+      u.show("u:");
+      -| u:
+            1       0       0       0
+            0       1       0       0
+            0       0       1       0
+            0       0       0       1
+ </pre>
+    <p>If <code>inverse()</code> is called with no argument, or with the argument
+ <code>false</code>, it returns a
+ <code>Transform</code> representing its inverse, and remains unchanged.  If it
+ is called with the argument <code>true</code>, it is set to its inverse.
+ 
+    <p>Complete reversal of the transformations applied to a <code>Point</code>, as
+ in the previous example, probably won't make much sense.  However,
+ partial reversal is a valuable technique.  For example, it is used in
+ <code>rotate()</code> for rotation about a line defined by two <code>Points</code>. 
+ The following example merely demonstrates the basic principle;  an
+ example that does something useful would be too complicated.
+ 
+ <!-- !! TO DO:  Change this example so that it demonstrates rotation about -->
+ <!-- a line defined by two @code{Points}.  Change the paragraph above to -->
+ <!-- correspond.  LDF 2003.08.15. -->
+ <pre class="example">     Transform t;
+      t.shift(3, 4, 5);
+      t.rotate(45);
+      t.scale(2, 2, 2);
+      Point p;
+      p *= t;
+      p.show("p:");
+      -| p: (6, 12.7279, 1.41421)
+      t.inverse(true);
+      p.rotate(90, 90);
+      p *= t;
+      p.show("p:");
+      -| p: (3.36396, -5.62132, -2.37868)
+ </pre>
+    <!-- chapter Drawing and Labeling Points -->
+ <!-- gsdlpt.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Drawing-and-Labeling-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Paths">Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transforms">Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">5 Drawing and Labeling Points</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Drawing-Points-Intro">Drawing Points Intro</a>
+ <li><a accesskey="2" href="#Labeling-Points-Intro">Labeling Points Intro</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Drawing-Points-Intro"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Labeling-Points-Intro">Labeling Points Intro</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">5.1 Drawing Points</h3>
+ 
+ <p><a name="index-drawing-and-filling-44"></a>It's all very well to declare <code>Points</code>, place them at particular
+ locations, print their locations to standard output, and transform them,
+ but none of these operations produce any MetaPost output. 
+ In order to do this, the first step is to use <dfn>drawing and
+ filling commands</dfn>.  The drawing and filling commands in 3DLDF are
+ modelled on those in Metafont.
+ 
+    <p><a name="index-pens-45"></a>The following example demonstrates how to draw a dot specifying a
+ <code>Color</code> (see <a href="#Color-Reference">Color Reference</a>) and a
+ <dfn>pen</dfn><a rel="footnote" href="#fn-13" name="fnd-13"><sup>13</sup></a>.
+ 
+ <pre class="example">     Point P(0, 1);
+      P.drawdot(Colors::black, "pencircle scaled 3mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF3.png"
+ alt="[Figure 3. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 3. 
+ <br>
+ </p>
+ 
+    <p>In <code>drawdot()</code>, a <code>Color</code> argument precedes the
+ <code>string</code> argument for the pen, so &ldquo;<code>Colors::black</code>&rdquo; must be
+ specified as a placeholder in the call to
+ <code>drawdot()</code>.<a rel="footnote" href="#fn-14" name="fnd-14"><sup>14</sup></a>
+ 
+    <p>The following example &ldquo;undraws&rdquo; a dot at the same location using a
+ smaller pen. <code>undraw()</code> does not take a <code>Color</code> argument.
+ 
+ <pre class="example">     p.undrawdot("pencircle scaled 2mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF4.png"
+ alt="[Figure 4. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 4. 
+ <br>
+ </p>
+ 
+ <p class="noindent">For complete descriptions of <code>drawdot()</code> and <code>undrawdot()</code>,
+ see <a href="#Point-Drawing-Functions">Point Reference; Drawing</a>.
+ 
+    <p><a name="index-drawing-and-filling-46"></a><a name="index-lines_002c-drawing-47"></a><a name="index-connecting-_0040code_007bPoints_007d-48"></a><a name="index-g_t_0040code_007bPoints_007d_002c-connecting-49"></a>Drawing and undrawing dots is not very exciting.  In order to make a
+ proper drawing it is necessary to <em>connect</em> the <code>Points</code>.  The most
+ basic way of doing this is to use the <code>Point</code> member function
+ <code>draw()</code> with a <code>Point</code> argument:
+ 
+ <pre class="example">     Point p0;
+      Point p1(2, 2);
+      p0.draw(p1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF5.png"
+ alt="[Figure 5. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 5. 
+ <br>
+ </p>
+ 
+ <p class="noindent"><code>p0.draw(p1)</code> is equivalent in its effect to
+ <code>p1.draw(p0)</code>.
+ 
+    <p>The function <code>Point::draw()</code> takes a required <code>Point&amp;</code>
+ argument (a <dfn>reference</dfn><a rel="footnote" href="#fn-15" name="fnd-15"><sup>15</sup></a>
+ to a <code>Point</code>) an optional <code>Color</code>
+ argument, and optional <code>string</code> arguments for
+ the dash pattern and the
+ pen.  The <code>string</code> arguments, if present, are passed unchanged to
+ the output file. 
+ The empty <code>string</code> following the
+ argument <code>p1</code> is a placeholder for the dash pattern argument, which
+ isn't used here.
+ 
+ <pre class="example">     p0.draw(p1, Colors::gray, "", "pensquare scaled .5cm rotated 45");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF6.png"
+ alt="[Figure 6. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 6. 
+ <br>
+ </p>
+ 
+    <p>The function <code>Point::undraw()</code> takes a required <code>Point&amp;</code>
+ argument and
+ optional <code>string</code> arguments for the dash pattern and the
+ pen.  Unlike <code>Point::draw()</code>, a <code>Color</code> argument would have no
+ meaning for <code>Point::undraw()</code>. 
+ The <code>string</code> arguments are passed unchanged to the output file.
+ 
+    <p><code>undraw()</code> can be used to &ldquo;hollow out&rdquo; the region
+ drawn in [the previous figure]
+ .  Since a dash pattern is used, portions
+ of the middle of the region are not undrawn.
+ 
+ <pre class="example">     p0.undraw(p1, "evenly scaled 6", "pencircle scaled .2cm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF7.png"
+ alt="[Figure 7. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 7. 
+ <br>
+ </p>
+ 
+    <p>For complete descriptions of <code>draw()</code> and <code>undraw()</code>,
+ see <a href="#Point-Drawing-Functions">Point Reference; Drawing</a>.
+ 
+ <div class="node">
+ <a name="Labeling-Points-Intro"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Drawing-Points-Intro">Drawing Points Intro</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>
+ 
+ </div>
+ 
+ <h3 class="section">5.2 Labeling Points</h3>
+ 
+ <p>The labels in the previous examples were made by using the functions
+ <code>Point::label()</code> and <code>Point::dotlabel()</code>, which make it
+ possible to include TeX text in a drawing.
+ 
+    <p><code>label()</code> and <code>dotlabel()</code> take <code>string</code> arguments for
+ the text of the label and the position of the label with respect to the
+ <code>Point</code>.  The label text is formatted using TeX, so it can contain
+ math mode material between dollar signs.  Please note that double backslashes
+ must be used, where a single backslash would suffice in a file of
+ MetaPost code, for example, for TeX control sequences. 
+ Alternatively, a <code>short</code> argument can be used for the label.
+ 
+    <p>The position argument is optional, with <code>"top"</code> as the default.  If
+ the empty <code>string</code> <code>""</code> is used, the label will centered about
+ the <code>Point</code> itself.  This will usually only make sense for
+ <code>label()</code>, because it would otherwise interfere with the dot. 
+ Valid arguments for the
+ position are the same as in MetaPost: <code>"top"</code>, <code>"bot"</code>
+ (bottom), <code>"lft"</code> (left), <code>"rt"</code> (right),
+ <code>"ulft"</code> (upper left), <code>"urt"</code> (upper right),
+ <code>"llft"</code> (lower left), and <code>"lrt"</code> (lower right).
+ 
+ <pre class="example">     Point p0;
+      Point p1(1);
+      Point p2(2);
+      Point p3(p0);
+      Point p4(p1);
+      Point p5(p2);
+      p3 *= p4 *= p5.shift(0, 1);
+      p0.draw(p1);
+      p1.draw(p2);
+      p2.draw(p5);
+      p5.draw(p4);
+      p4.draw(p3);
+      p3.draw(p0);
+      p0.label($p_0$, "");
+      p1.dotlabel(1);
+      p2.dotlabel("p2", "bot");
+      p3.dotlabel("This is $p_3$", "lft");
+      p4.label(4);
+      p5.label("$\\leftarrow p_5$", "rt");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF8.png"
+ alt="[Figure 8. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 8. 
+ <br>
+ </p>
+ 
+    <p>For complete descriptions of <code>Point::label()</code> and
+ <code>Point::dotlabel()</code>, see <a href="#Labelling-Points">Points; Labelling</a>.
+ 
+ <!-- chapter Paths -->
+ <!-- gspaths.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Plane-Figures">Plane Figures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Drawing-and-Labeling-Points">Drawing and Labeling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">6 Paths</h2>
+ 
+ <p><a name="index-Path-50"></a><a name="index-paths-51"></a><a name="index-connectors-52"></a><code>Points</code> alone are not enough for making useful drawings.  The next
+ step is to combine them into <code>Paths</code>, which are similar to
+ Metafont's <b>paths</b>, except that they are three-dimensional. 
+ A <code>Path</code> consists of a number of <code>Points</code> and <code>strings</code>
+ representing the <dfn>connectors</dfn>.  The latter are not processed by
+ 3DLDF, but are passed unchanged to the output file.  They must be valid
+ connectors for MetaPost, e.g.:
+ 
+    <p><a name="index-curl-53"></a><a name="index-tension-54"></a><a name="index-controls-55"></a><a name="index-control-points-56"></a>
+ <pre class="example">     <tt>..</tt>
+      <tt>...</tt>
+      <tt>--</tt>
+      <tt>---</tt>
+      <tt>&amp;</tt>
+      <tt>curl{2}..</tt>
+      <tt>{dir 60}..</tt>
+      <tt>{z1 - z2}..</tt>
+      <tt>.. tension 1 and 1.5..</tt>
+      <tt>..controls z1 and z2..</tt>
+ </pre>
+    <p>Usually, it will only make sense to use <tt>..</tt> or <tt>&ndash;</tt>, and not
+ <tt>...</tt>, <tt>&mdash;</tt>, <tt>tension</tt>, <tt>curl</tt>, <tt>controls</tt>, or any of the
+ other possibilities, in <code>Paths</code>, unless
+ you are sure that they will only be viewed with no foreshortening due to
+ the perspective
+ projection.  This can be the case, when a <code>Path</code> lies in a plane
+ parallel to one of the major planes, and is projected using parallel
+ projection onto that plane.  Otherwise,
+ the result of using these connectors is likely to be unsatisfactory, because
+ MetaPost performs its calculations based purely on the two-dimensional
+ values of the points in the perspective projection. 
+ While the <code>Points</code> on the <code>Path</code> will be projected correctly,
+ the course of the <code>Path</code> between these <code>Points</code> is likely to
+ differ, depending on the values of the <code>Focus</code>
+ used (see <a href="#Focuses-Getstart">Focuses</a>), so that
+ different views of the same <code>Path</code> may well be mutually
+ inconsistent. 
+ This problem doesn't arise with &ldquo;<tt>&ndash;</tt>&rdquo;, since the perspective
+ projection does not &ldquo;unstraighten&rdquo; straight lines,
+ but it does with &ldquo;<tt>..</tt>&rdquo;, even without <tt>tension</tt>, <tt>curl</tt>,
+ or <tt>controls</tt>. 
+ The solution is to use enough <code>Points</code>, since a greater number of
+ <code>Points</code> on a <code>Path</code> tends to reduce the number
+ of possible courses through the <code>Points</code>.<a rel="footnote" href="#fn-16" name="fnd-16"><sup>16</sup></a>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>
+ <li><a accesskey="2" href="#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Declaring-and-Initializing-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Drawing-and-Filling-Paths-Intro">Drawing and Filling Paths Intro</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Paths">Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Paths">Paths</a>
+ 
+ </div>
+ 
+ <h3 class="section">6.1 Declaring and Initializing Paths</h3>
+ 
+ <p>There are various ways of declaring and initializing <code>Paths</code>.  The
+ simplest is to use the constructor taking two <code>Point</code> arguments:
+ 
+ <pre class="example">     Point A;
+      Point B(2, 2);
+      Path p(A, B);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF9.png"
+ alt="[Figure 9. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 9. 
+ <br>
+ </p>
+ 
+    <p><code>Paths</code> created in this way are important, because they are
+ guaranteed to be linear, as long as no operations are performed on them
+ that cause them to become non-linear. 
+ Linear <code>Paths</code> can be used to find <dfn>intersections</dfn>. 
+ See <a href="#Path-Intersections">Path Intersections</a>.
+ 
+    <p><code>Paths</code> can be declared and initialized using a single connector
+ and an arbitrary number of <code>Points</code>.  The first argument is a
+ <code>string</code> specifying the connector.  It is followed by a
+ <code>bool</code>, indicating whether the
+ <code>Path</code> is cyclical or not. Then, an arbitrary number of
+ pointers to <code>Point</code> follow.  The last argument must be 0.<a rel="footnote" href="#fn-17" name="fnd-17"><sup>17</sup></a>
+ 
+ <pre class="example">     Point p[3];
+      p[0].shift(1);
+      p[1].set(1, 2, 2);
+      p[2].set(1, 0, 2);
+      Path pa("--", true, &amp;p[0], &amp;p[1], &amp;p[2], 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF10.png"
+ alt="[Figure 10. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 10. 
+ <br>
+ </p>
+ 
+    <p>Another constructor must be used for <code>Paths</code> with
+ more than one connector and an arbitrary number of <code>Points</code>. 
+ The argument list starts with a pointer to <code>Point</code>, followed by
+ <code>string</code> for the first connector.  Then,
+ pointer to <code>Point</code> arguments alternate with <code>string</code> arguments
+ for the connectors. 
+ Again, the list of arguments ends in 0.  There is no
+ need for a <code>bool</code> to indicate whether the <code>Path</code> is cyclical
+ or not;  if it is, the last non-zero argument will be a connector,
+ otherwise, it will be a pointer to <code>Point</code>.
+ 
+ <pre class="example">     Point p[8];
+      p[0].set(-2);
+      p[1].set(2);
+      p[2].set(0, 0, -2);
+      p[3].set(0, 0, 2);
+      p[4] = p[0].mediate(p[2]);
+      p[5] = p[2].mediate(p[1]);
+      p[6] = p[1].mediate(p[3]);
+      p[7] = p[3].mediate(p[0]);
+      p[4] *= p[5] *= p[6] *= p[7].shift(0, 1);
+      Path pa(&amp;p[0], "..", &amp;p[4], "...", &amp;p[2],
+              "..", &amp;p[5], "...", &amp;p[1], "..", &amp;p[6],
+              "...", &amp;p[3], "..", &amp;p[7], "...", 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF11.png"
+ alt="[Figure 11. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 11. 
+ <br>
+ </p>
+ 
+    <p>As mentioned above (see <a href="#Accuracy">Accuracy</a>), specifying connectors is
+ problematic for three-dimensional <code>Paths</code>,
+ because MetaPost ultimately calculates the &ldquo;most pleasing curve&rdquo;
+ based on the two-dimensional points in the MetaPost code written by
+ 3DLDF.<a rel="footnote" href="#fn-18" name="fnd-18"><sup>18</sup></a>
+ For this reason, it's advisable to avoid specifying &lsquo;<samp><span class="samp">curl</span></samp>&rsquo;,
+ &lsquo;<samp><span class="samp">dir</span></samp>&rsquo;, &lsquo;<samp><span class="samp">tension</span></samp>&rsquo; or control points in connectors. 
+ The more <code>Points</code> a (3DLDF) <code>Path</code> or other object contains,
+ the less freedom MetaPost has to determine the (MetaPost) <code>path</code>
+ through them. 
+ So a three-dimensional <code>Path</code> or
+ other object in 3DLDF should have enough <code>Points</code> to ensure
+ satisfactory results.  The <code>Path</code> in [the previous figure]
+  does not
+ really have enough <code>Points</code>.  It may require some trial and error
+ to determine
+ what a sufficient number of <code>Points</code> is in a given case.
+ 
+    <p><code>Paths</code> are very flexible, but not always convenient.  3DLDF
+ provides a number of classes representing common geometric
+ <code>Shapes</code>, which will be described in subsequent sections, and I
+ intend to add more in the course of time.
+ 
+ <div class="node">
+ <a name="Drawing-and-Filling-Paths-Intro"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Declaring-and-Initializing-Paths">Declaring and Initializing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Paths">Paths</a>
+ 
+ </div>
+ 
+ <h3 class="section">6.2 Drawing and Filling Paths</h3>
+ 
+ <p>The easiest way to draw a <code>Path</code> is with no arguments.
+ 
+ <pre class="example">     Point pt[5];
+      pt[0].set(-1, -2);
+      pt[1].set(0, -3);
+      pt[2].set(1, 0);
+      pt[3].set(2, 1);
+      pt[4].set(-1, 2);
+      Path pa("..", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3], &amp;pt[4], 0);
+      pa.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF12.png"
+ alt="[Figure 12. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 12. 
+ <br>
+ </p>
+ 
+    <p>Since <code>pa</code> is closed, it can be filled as well as drawn.  The
+ following example uses <code>fill()</code> with a <code>Color</code> argument, in
+ order to avoid having a large splotch of black on the page. 
+ Common <code>Colors</code> are declared in the <code>namespace Colors</code>. 
+ See <a href="#Color-Reference">Color Reference</a>.
+ 
+ <pre class="example">     pa.fill(Colors::gray);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF13.png"
+ alt="[Figure 13. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 13. 
+ <br>
+ </p>
+ 
+    <p>Closed <code>Paths</code> can be filled and drawn, using the function
+ <code>filldraw()</code>.  This function draws the <code>Path</code> using the pen
+ specified, or MetaPost's <code>currentpen</code> by default.  A <code>Color</code>
+ for drawing the <code>Path</code> can also be specified, otherwise, the
+ default color (currently <code>Colors::black</code>) is used. 
+ In addition, the <code>Path</code> is filled using a second <code>Color</code>,
+ which can be specified, or the background_color
+ (<code>Colors::background_color</code>), by default. 
+ Filling a <code>Path</code> using the background color causes it to hide
+ objects that lie behind it. 
+ See <a href="#Surface-Hiding">Surface Hiding</a>, for a description of the surface hiding
+ algorithm, and examples.  Currently, this algorithm is quite primitive
+ and only works
+ for simple cases.
+ 
+ <pre class="example">     Point p0(-3, 0, 1);
+      Point p1(3, 1, 1);
+      p0.draw(p1);
+      pa.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF14.png"
+ alt="[Figure 14. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 14. 
+ <br>
+ </p>
+ 
+    <p>The following example uses arguments for the <code>Colors</code> used for
+ drawing and filling, and the pen.  The empty string argument before the
+ pen argument is a placeholder for the dash pattern argument.
+ 
+ <pre class="example">     pa.filldraw(black, gray, "",
+         "pensquare xscaled 3mm yscaled 1mm rotated 60");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF15.png"
+ alt="[Figure 15. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 15. 
+ <br>
+ </p>
+ 
+    <p><code>Paths</code> can also be &ldquo;undrawn&rdquo;, &ldquo;unfilled&rdquo;, and &ldquo;unfilldrawn&rdquo;,
+ using the corresponding functions:
+ 
+ <pre class="example">     pa.fill(gray);
+      p0.undraw(p1, "", "pencircle scaled 3mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF16.png"
+ alt="[Figure 16. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 16. 
+ <br>
+ </p>
+ 
+ <pre class="example">     pa.fill(gray);
+      Path q;
+      q = pa;
+      q.scale(.5, .5);
+      q.unfill();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF17.png"
+ alt="[Figure 17. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 17. 
+ <br>
+ </p>
+ 
+    <p>The function <code>unfilldraw()</code> takes a <code>Color</code> argument for
+ drawing the <code>Path</code>, which is <code>*Colors::background_color</code> by
+ default.  This makes it possible to unfill the <code>Path</code> while drawing
+ the outline with a visible <code>Color</code>.  On the other hand, it also
+ makes it necessary to specify <code>*Colors::background_color</code> or
+ <code>Colors::white</code>, if the user wants to use the dash pattern and/or
+ pen arguments, without drawing the <code>Path</code>.
+ 
+ <pre class="example">     pa.fill(gray);
+      q.unfilldraw(white, "", "pensquare xscaled 3mm yscaled 1mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF18.png"
+ alt="[Figure 18. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 18. 
+ <br>
+ </p>
+ 
+    <p>The following example demonstrates the use of <code>unfilldraw()</code> with
+ <code>black</code> as its <code>Color</code> argument.  Unfortunately, it also
+ demonstrates one of the limitations of the surface hiding algorith:  The
+ line from <code>p0</code> to <code>p1</code> is hidden by the
+ filled <code>Path pa</code>.  Since the portion of <code>pa</code> covered by
+ <code>Path q</code> has been unfilled,
+ the line from p_0 to p_1
+ should be visible as it passes through <code>q</code>.  However, from the
+ point of view of 3DLDF, there is no relationship between <code>pa</code> and
+ <code>q</code>;  nor does it &ldquo;know&rdquo; whether a <code>Path</code> has been filled or
+ unfilled.  If it's on a <code>Picture</code>, it will hide objects lying
+ behind it, unless the surface hiding algorithm fails for another
+ reason.  See <a href="#Surface-Hiding">Surface Hiding</a>, for more information.
+ 
+ <pre class="example">     p0.draw(p1);
+      pa.fill(gray);
+      q.unfilldraw(black, "", "pensquare xscaled 3mm yscaled 1mm");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF19.png"
+ alt="[Figure 19. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 19. 
+ <br>
+ </p>
+ 
+    <p>See <a href="#Drawing-and-Filling-Paths">Paths; Drawing and Filling</a>, for more
+ information, and complete descriptions of the functions.
+ 
+ <!-- chapter Plane Figures -->
+ <!-- gsplane.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Plane-Figures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solid-Figures">Solid Figures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Paths">Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">7 Plane Figures</h2>
+ 
+ <p><a name="index-Circle-57"></a><a name="index-Ellipse-58"></a><a name="index-Polygon-59"></a><a name="index-Rectangle-60"></a><a name="index-Reg_005fCl_005fPlane_005fCurve-61"></a><a name="index-Reg_005fPolygon-62"></a>3DLDF currently includes the following classes representing plane
+ geometric figures:  <code>Polygon</code>, <code>Reg_Cl_Plane_Curve</code>
+ (&ldquo;Regular Closed Plane Curve&rdquo;), <code>Reg_Polygon</code> (&ldquo;Regular
+ Polygon&rdquo;), <code>Rectangle</code>, <code>Ellipse</code> and
+ <code>Circle</code>.  <code>Polygon</code> and <code>Reg_Cl_Plane_Curve</code> are derived
+ from <code>Path</code>, <code>Reg_Polygon</code> and <code>Rectangle</code> are derived
+ from <code>Polygon</code>, and <code>Ellipse</code> and <code>Circle</code> are derived
+ from <code>Reg_Cl_Plane_Curve</code>.  <code>Polygon</code> and
+ <code>Reg_Cl_Plane_Curve</code> are meant to be used as base classes only, so
+ objects of these types should normally never be declared.
+ 
+    <p>Since <code>Reg_Polygon</code>, <code>Rectangle</code>, <code>Ellipse</code>, and
+ <code>Circle</code> all ultimately derive from <code>Path</code>, they are really
+ just special kinds of <code>Path</code>. 
+ In particular, they inherit their drawing and filling functions from
+ <code>Path</code>, and their transformation functions take the same arguments
+ as the <code>Path</code> versions. 
+ They also have constructors
+ and setting functions that work in a similar way, with a few minor
+ differences, to account for their different natures. 
+ See <a href="#Polygon-Reference">Polygon Reference</a>, <a href="#Rectangle-Reference">Rectangle Reference</a>,
+ <a href="#Ellipse-Reference">Ellipse Reference</a>, and <a href="#Circle-Reference">Circle Reference</a>, for complete
+ information on these classes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Regular-Polygons-Getstart">Regular Polygons Getstart</a>
+ <li><a accesskey="2" href="#Rectangles-Getstart">Rectangles Getstart</a>
+ <li><a accesskey="3" href="#Ellipses-Getstart">Ellipses Getstart</a>
+ <li><a accesskey="4" href="#Circles-Getstart">Circles Getstart</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Regular-Polygons-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rectangles-Getstart">Rectangles Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Figures">Plane Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Figures">Plane Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">7.1 Regular Polygons</h3>
+ 
+ <p>The following example creates a pentagon in the x-z plane, centered
+ about the origin, whose enclosing circle has a radius equal to 3cm.
+ 
+ <pre class="example">     default_focus.set(2, 3, -10, 2, 3, 10, 10);
+      Reg_Polygon p(origin, 5, 3);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF20.png"
+ alt="[Figure 20. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 20. 
+ <br>
+ </p>
+ 
+    <p>Three additional arguments cause the pentagon to be rotated about the x,
+ y, and z axes by the amount indicated.  In this example, it's rotated
+ 90 degrees
+ 
+    <p>about the x-axis, so that it comes to lie in the x-y plane:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 90);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF21.png"
+ alt="[Figure 21. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 21. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 36 degrees
+ 
+    <p>about the y-axis, so that it appears to point in the opposite
+ direction from the first example:
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 0, 36);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF22.png"
+ alt="[Figure 22. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 22. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 90 degrees
+ 
+    <p>about the z-axis, so that it lies in the z-y plane:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 0, 0, 90);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF23.png"
+ alt="[Figure 23. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 23. 
+ <br>
+ </p>
+ 
+    <p>In this example, it's rotated
+ 45 degrees
+ 
+    <p>about the x, y, and z-axes in that order:
+ 
+ <pre class="example">     Reg_Polygon p(origin, 5, 3, 45, 45, 45);
+      p.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF24.png"
+ alt="[Figure 24. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 24. 
+ <br>
+ </p>
+ 
+    <p><code>Reg_Polygons</code> need not be centered about the <code>origin</code>.  If
+ another <code>Point</code> <var>pt</var> is used as the first argument, the <code>Reg_Polygon</code>
+ is first created with its center at the origin, then the specified
+ rotations, if any, are performed.  Finally, the <code>Reg_Polygon</code> is
+ shifted such that its center comes to lie on <var>pt</var>:
+ 
+ <pre class="example">     Point P(-2, 1, 1);
+      Reg_Polygon hex(P, 6, 4, 60, 30, 30);
+      hex.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF25.png"
+ alt="[Figure 25. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 25. 
+ <br>
+ </p>
+ 
+    <p>In the following example, the <code>Reg_Polygon</code> <code>polygon</code> is first
+ declared using the default constructor, which creates an empty
+ <code>Reg_Polygon</code>.  Then, the <code>polygon</code> is repeatedly changed using
+ the setting function corresponding to the constructor used in the
+ previous examples.  [next figure]
+  demonstrates that a given
+ <code>Reg_Polygon</code> need not always have the same number of sides.
+ 
+ <pre class="example">     Point p(0, -3);
+      Reg_Polygon polygon;
+      for (int i = 3; i &lt; 9; ++i)
+        {
+          polygon.set(p, i, 3);
+          polygon.draw();
+          p.shift(0, 1);
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF26.png"
+ alt="[Figure 26. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 26. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Rectangles-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipses-Getstart">Ellipses Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygons-Getstart">Regular Polygons Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Figures">Plane Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">7.2 Rectangles</h3>
+ 
+ <p>A <code>Rectangle</code> can be constructed in the x-z plane by specifying a
+ center <code>Point</code>, the width, and the height:
+ 
+ <pre class="example">     Rectangle r(origin, 2, 3);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF27.png"
+ alt="[Figure 27. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 27. 
+ <br>
+ </p>
+ 
+    <p>Three additional arguments can be used to specify rotation about the x,
+ y, and z-axes respectively:
+ 
+ <pre class="example">     Rectangle r(origin, 2, 3, 30, 45, 15);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF28.png"
+ alt="[Figure 28. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 28. 
+ <br>
+ </p>
+ 
+    <p>If a <code>Point</code> <var>p</var> other than the origin is specified as the center of
+ the <code>Rectangle</code>, the latter is first created in the x-z plane,
+ centered about the origin, as above.  Then, any rotations specified are
+ performed.  Finally, the <code>Rectangle</code> is shifted such that its center
+ comes to lie at <var>p</var>:
+ 
+ <pre class="example">     Point p0(.5, 1, 3);
+      Rectangle r(p0, 4, 2, 30, 30, 30);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF29.png"
+ alt="[Figure 29. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 29. 
+ <br>
+ </p>
+ 
+    <p>This constructor has a corresponding setting function:
+ 
+ <pre class="example">     Rectangle r;
+      for (int i = 0; i &lt; 180; i += 30)
+        {
+          r.set(origin, 4, 2, i);
+          r.draw();
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF30.png"
+ alt="[Figure 30. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 30. 
+ <br>
+ </p>
+ 
+    <p><code>Rectangles</code> can also be specified using four <code>Points</code> as
+ arguments, whereby they must be ordered so that they are contiguous in
+ the resulting <code>Rectangle</code>:
+ 
+ <pre class="example">     Point pt[4];
+      pt[0].shift(-1, -2);
+      pt[2] = pt[1] = pt[0];
+      pt[1].rotate(180);
+      pt[3] = pt[1];
+      pt[2] *= pt[3].rotate(0, 180);
+      Rectangle r(pt[0], pt[2], pt[3], pt[1]);
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF31.png"
+ alt="[Figure 31. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 31. 
+ <br>
+ </p>
+ 
+    <p>This constructor checks whether the <code>Point</code> arguments are coplanar,
+ however, it does not check whether they are really the corners of a
+ valid rectangle;  the user, or the code that calls this function, must
+ ensure that they are.  In the following
+ example, <code>r</code>, although not rectangular, is a <code>Rectangle</code>, as
+ far as 3DLDF is concerned:
+ 
+ <pre class="example">     pt[0].shift(0, -1);
+      pt[3].shift(0, 1);
+      Rectangle q(pt[0], pt[2], pt[3], pt[1]);
+      q.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF32.png"
+ alt="[Figure 32. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 32. 
+ <br>
+ </p>
+ 
+    <p>This constructor is not really intended to be used directly, but should
+ mostly be called from within other functions, that should ensure that
+ the arguments produce a rectangular <code>Rectangle</code>.  There is also no
+ guarantee that transformations or other functions called on
+ <code>Rectangle</code>, <code>Circle</code>, or other classes representing
+ geometric figures won't cause them to become non-rectangular,
+ non-circular, or otherwise irregular.  Sometimes, this might even be
+ desirable.  I plan to add the function
+ <code>Rectangle::is_rectangular()</code> soon, so that users can test
+ <code>Rectangles</code> for rectangularity.
+ 
+ <div class="node">
+ <a name="Ellipses-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circles-Getstart">Circles Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangles-Getstart">Rectangles Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Figures">Plane Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">7.3 Ellipses</h3>
+ 
+ <p><code>Ellipse</code> has a constructor similar to those for
+ <code>Reg_Polygon</code> and <code>Rectangle</code>.  The first argument is the
+ center of the <code>Ellipse</code>, and the following two specify the lengths
+ of the horizontal and vertical axes respectively.  The <code>Ellipse</code> is
+ first created in the x-z plane, centered about the origin.  The
+ horizontal axis lies along the x-axis and the vertical axis lies along
+ the z-axis.  The three subsequent arguments specify the amounts of
+ rotation about the x, y, and z-axes respectively and default to 0. 
+ Finally,
+ <code>Ellipse</code> is shifted such that its center comes to lie at the
+ <code>Point</code> specified in the first argument.
+ 
+ <pre class="example">     Point pt(-1, 1, 1);
+      Ellipse e(pt, 3, 6, 90);
+      e.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF33.png"
+ alt="[Figure 33. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 33. 
+ <br>
+ </p>
+ 
+    <p>As you may expect, this constructor has a corresponding setting
+ function:
+ 
+ <!-- !! TO DO: Simplify this example.  LDF 2003.08.15. -->
+ <pre class="example">     Ellipse e;
+      real h_save = 1.5;
+      real v_save = 2;
+      real h = h_save;
+      real v = v_save;
+      Point p(-1);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+            e.set(p, h, v, 90);
+            e.draw();
+            h_save += .25;
+            v_save += .25;
+            h *= sqrt(h_save);
+            v *= sqrt(v_save);
+            p.shift(0, 0, 2);
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF34.png"
+ alt="[Figure 34. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 34. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Circles-Getstart"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipses-Getstart">Ellipses Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Figures">Plane Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">7.4 Circles</h3>
+ 
+ <p><code>Circles</code> are constructed just like <code>Ellipses</code>, except that
+ the vertical and horizontal axes are per definition the same, so
+ there's only one argument for the diameter, instead of two for the
+ horizontal and vertical axes:
+ 
+ <pre class="example">     Point P(0, 2, 1);
+      Circle c(P, 3.5, 90, 90);
+      c.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF35.png"
+ alt="[Figure 35. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 35. 
+ <br>
+ </p>
+ 
+    <p>This constructor, too, has a corresponding setting function:
+ 
+ <pre class="example">     Circle c;
+      Point p(-1, 0, 5);
+      for (int i = 0; i &lt; 16; ++i)
+        {
+            c.set(p, 5, i * 22.5, 0, 0, 64);
+            c.draw();
+        }
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF36.png"
+ alt="[Figure 36. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 36. 
+ <br>
+ </p>
+ 
+    <p>In the preceding example, the last argument to <code>set()</code>, namely &ldquo;64&rdquo;,
+ is for the number of <code>Points</code> used for constructing the perimeter
+ of the <code>Circle</code>.  The default value is 16, however, if it is used,
+ foreshortening distorts the most nearly horizontal <code>Circle</code>. 
+ Increasing the number of points used improves its appearance.  However,
+ there may be a limit to how much improvement is possible. 
+ See <a href="#Accuracy">Accuracy</a>.
+ 
+ <!-- chapter Solid Figures -->
+ <!-- gssolfig.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Solid-Figures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Pictures">Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Figures">Plane Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">8 Solid Figures</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Cuboid-Getstart">Cuboid Getstart</a>
+ <li><a accesskey="2" href="#Polyhedron-Getstart">Polyhedron Getstart</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Cuboid-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Polyhedron-Getstart">Polyhedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Figures">Solid Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Figures">Solid Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">8.1 Cuboids</h3>
+ 
+ <p><a name="index-Cuboid-63"></a>A <dfn>cuboid</dfn> is a solid figure consisting of six rectangular faces
+ that meet at right angles.  A cube is a special form of cuboid, whose
+ faces are all squares.  The constructor for the class <code>Cuboid</code>
+ follows the pattern familiar from the constructors for the plane
+ figures:  The first argument is the center of the <code>Cuboid</code>,
+ followed by three <code>real</code> arguments for the height, width, and
+ depth, and then three more <code>real</code> arguments for the angles of
+ rotation about the x, y, and z-axes.  The <code>Cuboid</code> is first
+ constructed with its center at the origin.  Its width, height, and depth
+ are measured along the x, y, and z-axes respectively.  If rotations are
+ specified, it is rotated about the x, y, z-axes in that order.  Finally,
+ it is shifted such that its center comes to lie on its <code>Point</code>
+ argument, if the latter is not the origin.
+ 
+    <p>If the width, height, and depth arguments are equal, the <code>Cuboid</code>
+ is a cube:
+ 
+ <pre class="example">     Cuboid c0(origin, 3, 3, 3, 0, 30);
+      c0.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF37.png"
+ alt="[Figure 37. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 37. 
+ <br>
+ </p>
+ 
+    <p>In the following example, the <code>Cuboid</code> is &ldquo;filldrawn&rdquo;, so that
+ the lines dilineating the hidden surfaces of the <code>Cuboid</code> are
+ covered.
+ 
+ <pre class="example">     Cuboid c1(origin, 3, 4, 5, 0, 30);
+      c1.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF38.png"
+ alt="[Figure 38. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 38. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Polyhedron-Getstart"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Cuboid-Getstart">Cuboid Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Figures">Solid Figures</a>
+ 
+ </div>
+ 
+ <h3 class="section">8.2 Polyhedron</h3>
+ 
+ <p><a name="index-Polyhedron-64"></a>The <code>class Polyhedron</code> is meant for use only as a base class;
+ no objects of type <code>Polyhedron</code> should be declared.  Instead, there
+ is a class for each of the different drawable polyhedra.  Currently,
+ 3DLDF defines only three: <code>Tetrahedron</code>, <code>Dodecahedron</code>, and
+ <code>Icosahedron</code>.  There's no need for a <code>Cube</code> class, because
+ cubes can be drawn using <code>Cuboid</code> (see <a href="#Cuboid-Getstart">Cuboid Getstart</a>).
+ 
+    <p>Polyhedra have a high priority in my plans for 3DLDF. 
+ I intend to add <code>Octahedron</code> soon, which will complete the set of regular
+ Platonic polyhedra.  Then I will begin adding the semi-regular
+ Archimedean polyhedra, and their duals.
+ 
+    <p>The constructors for the classes derived from <code>Polyhedron</code> follow
+ the pattern familiar from the classes already described.  The constructors
+ for the classes described below have identical arguments:  First, a
+ <code>Point</code> specifying the center, then a <code>real</code> for the
+ diameter of the surrounding circle (<em>Umkreis</em>, in German) of one of
+ its polygonal faces, followed by three
+ <code>real</code> arguments for the angles of rotation about the main axes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Tetrahedron-Getstart">Tetrahedron Getstart</a>
+ <li><a accesskey="2" href="#Dodecahedron-Getstart">Dodecahedron Getstart</a>
+ <li><a accesskey="3" href="#Icosahedron-Getstart">Icosahedron Getstart</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Tetrahedron-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Dodecahedron-Getstart">Dodecahedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polyhedron-Getstart">Polyhedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Getstart">Polyhedron Getstart</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">8.2.1 Tetrahedron</h4>
+ 
+ <p><a name="index-Tetrahedron-65"></a>The center of a tetrahedron is the intersection of the lines from a
+ vertex to the center of the opposite side.  At least, in 3DLDF, this is
+ the <code>center</code> of a <code>Tetrahedron</code>.  I'm not 100 degrees
+  certain
+ that this is mathematically correct.
+ 
+ <pre class="example">     Tetrahedron t(origin, 4);
+      t.draw();
+      t.get_center().dotlabel("$c$");
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF39.png"
+ alt="[Figure 39. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 39. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Dodecahedron-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Icosahedron-Getstart">Icosahedron Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Tetrahedron-Getstart">Tetrahedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Getstart">Polyhedron Getstart</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">8.2.2 Dodecahedron</h4>
+ 
+ <p><a name="index-Dodecahedron-66"></a>A dodecahedron has 12 similar regular pentagonal faces. 
+ The following examples show the same <code>Dodecahedron</code> using different
+ projections:
+ 
+ <pre class="example">     default_focus.set(2, 5, -10, 2, 5, 10, 10);
+      Dodecahedron d(origin, 3);
+      d.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF40.png"
+ alt="[Figure 40. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 40. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF41.png"
+ alt="[Figure 41. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 41. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p>Please note that the <code>Dodecahedron</code> in [next figure]
+  is drawn, and not
+ filldrawn!
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF42.png"
+ alt="[Figure 42. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 42. 
+ <br>
+ </p>
+ 
+ <!-- ***************************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF43.png"
+ alt="[Figure 43. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 43. 
+ <br>
+ </p>
+ 
+ <!-- ********************************** -->
+    <p>In [next figure]
+ , <code>d</code> is filldrawn.  In this case,
+ the surface hiding algorithm has worked properly. 
+ See <a href="#Surface-Hiding">Surface Hiding</a>.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF44.png"
+ alt="[Figure 44. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 44. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Icosahedron-Getstart"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dodecahedron-Getstart">Dodecahedron Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Getstart">Polyhedron Getstart</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">8.2.3 Icosahedron</h4>
+ 
+ <p><a name="index-Icosahedron-67"></a>An icosahedron has 20 similar regular triangular faces. 
+ The following examples show the same <code>Icosahedron</code> using different
+ projections:
+ 
+ <pre class="example">     default_focus.set(3, 0, -10, 2, 0, 10, 10);
+      Icosahedron i(origin, 3);
+      i.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF45.png"
+ alt="[Figure 45. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 45. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF46.png"
+ alt="[Figure 46. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 46. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF47.png"
+ alt="[Figure 47. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 47. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF48.png"
+ alt="[Figure 48. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 48. 
+ <br>
+ </p>
+ 
+ <!-- *************** -->
+    <p>In [next figure]
+ , <code>i</code> is filldrawn.  In this case,
+ the surface hiding algorithm has worked properly. 
+ See <a href="#Surface-Hiding">Surface Hiding</a>.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF49.png"
+ alt="[Figure 49. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 49. 
+ <br>
+ </p>
+ 
+ <!-- chapter Pictures -->
+ <!-- gspict.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Pictures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Intersections">Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Figures">Solid Figures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">9 Pictures</h2>
+ 
+ <p><a name="index-Picture-68"></a>Applying drawing and filling operations to the drawable objects described
+ in the previous chapters isn't enough to produce output.  These
+ operations merely modify the <code>Picture</code> object that was passed to
+ them as an argument (<code>current_picture</code>, by default).
+ 
+    <p><code>Pictures</code> in 3DLDF are quite different from <code>pictures</code> in
+ MetaPost. 
+ When a drawing or filling operation is applied to an object <var>O</var>, a
+ copy of <var>O</var>, <var>C</var>, is allocated on the free store, a pointer to
+ <code>Shape</code> <var>S</var> is pointed at <var>C</var>, and <var>S</var> is pushed onto
+ the <code>vector&lt;Shape*&gt; shapes</code> on the <code>Picture</code> <var>P</var>, which
+ was passed as an argument to the drawing or filling command.  The
+ arguments for the pen,
+ dash pattern, <code>Color</code>, and any others, are used to set the
+ corresponding data members of <var>C</var> (not <var>O</var>).
+ 
+    <p><a name="index-output-file-69"></a><a name="index-out_005fstream-70"></a>In order to actually
+ cause MetaPost code to be written to the output file, it is necessary
+ to invoke <var>P</var>.<code>output()</code>.  Now, the appropriate version of
+ <code>output()</code> is applied to each of the objects pointed to
+ by a pointer on <var>P</var>.<code>shapes</code>.  <code>output()</code> is a pure
+ virtual function in <code>Shape</code>, so all classes derived from
+ <code>Shape</code> must have an <code>output()</code> function.  So, if
+ <code>shapes[0]</code> points to a <code>Path</code>,
+ <code>Path::output()</code> is called, if
+ <code>shapes[1]</code> points to a <code>Point</code>,
+ <code>Point::output()</code> is called, and if <code>shapes[2]</code> points to an
+ object of a type derived from <code>Solid</code>, <code>Solid::output()</code> is
+ called. 
+ <code>Point</code>, <code>Path</code>, and <code>Solid</code> are namely the only classes
+ derived from <code>Shape</code> for which a version of <code>output()</code> is defined.  All
+ other <code>Shapes</code> are derived from one of these classes. 
+ These <code>output()</code>
+ functions then write the MetaPost code to the
+ output file through the output file stream <code>out_stream</code>.
+ 
+ <pre class="example">     beginfig(1);
+      default_focus.set(0, 0, -10, 0, 0, 10, 10);
+      Circle c(origin, 3, 90);
+      c.draw();
+      c.shift(1.5);
+      c.draw();
+      current_picture.output();
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF50.png"
+ alt="[Figure 50. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 50. 
+ <br>
+ </p>
+ 
+    <p>The C++
+  code for [the previous figure]
+  starts with the command
+ <code>beginfig(1)</code> and ends with the command
+ <code>endfig(1)</code>. 
+ They simply write &ldquo;<code>beginfig(&lt;arg&gt;
+ )</code>&rdquo; and
+ &ldquo;<code>endfig()</code>&rdquo; to
+ <a name="index-out_005fstream-71"></a><code>out_stream</code>,
+ <a name="index-output-files-72"></a>The optional
+ <code>unsigned int</code> argument to <code>endfig()</code> is not written to
+ <code>out_stream</code>, it's merely
+ &ldquo;syntactic sugar&rdquo; for the user. 
+ <!-- !! TO DO:  Try to find the place in the @TeX{}book, where Knuth -->
+ <!-- explains what ``syntactic sugar'' is. -->
+ 
+    <p>In MetaPost, the <code>endfig</code> command causes output and then clears
+ <code>currentpicture</code>.  This is not the case in 3DLDF, where
+ <code>Picture::output()</code> and <code>Picture::clear()</code> must
+ be invoked explicitly:
+ 
+ <pre class="example">     beginfig(1);
+      Point p0;
+      Point p1(1, 2, 3);
+      p0.draw(p1);
+      current_picture.output();
+      endfig(1);
+      
+      beginfig(2);
+      current_picture.clear();
+      Circle C(origin, 3);
+      C.fill();
+      current_picture.output();
+      endfig(2);
+ </pre>
+    <p>In [next figure]
+ , two <code>Pictures</code> are used within a single figure.
+ 
+ <pre class="example">     beginfig(1);
+      Picture my_picture;
+      default_focus.set(0, 0, -10, 0, 0, 10, 10);
+      Circle c(origin, 3, 90);
+      c.draw(my_picture);
+      my_picture.output();
+      c.shift(1.5);
+      c.fill(light_gray);
+      current_picture.output();
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF51.png"
+ alt="[Figure 51. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 51. 
+ <br>
+ </p>
+ 
+    <p>Multiple objects, or complex objects made up of sub-objects, can be
+ stored in a <code>Picture</code>, so that operations can be applied to them
+ as a group:
+ 
+ <pre class="example">     default_focus.set(7, 5, -10, 7, 5, 10, 10);
+      Cuboid c0(origin, 5, 5, 5);
+      c0.shift(0, 0, 3);
+      c0.draw();
+      Circle z0(c0.get_rectangle_center(0), 2.5, 90, 0, 0, 64);
+      z0.draw();
+      Circle z1(z0);
+      z1.shift(0, 0, -1);
+      z1.draw();
+      int i;
+      int j = z0.get_size();
+      for (i = 0; i &lt; 8; ++i)
+          z0.get_point(i * j/8).draw(z1.get_point(i * j/8));
+      Cuboid c1(c0.get_rectangle_center(4), 5, 3, 3);
+      c1.shift(0, 2.5);
+      c1.draw();
+      Rectangle r0 = *c1.get_rectangle_ptr(3);
+      Point p[10];
+      for (i = 0; i &lt; 4; ++i)
+        p[i] = r0.get_point(i);
+      p[4] = r0.get_mid_point(0);
+      p[5] = r0.get_mid_point(2);
+      p[6] = p[4].mediate(p[5], 2/3.0);
+      Circle z2(p[6], 2, 90, 90, 0, 16);
+      z2.draw();
+      Circle z3 = z2;
+      z3.shift(3);
+      z3.draw();
+      j = z2.get_size();
+      for (i = 0; i &lt; 8; ++i)
+          z2.get_point(i * j/8).draw(z3.get_point(i * j/8));
+      p[7] = c0.get_rectangle_center(2);
+      p[7].shift(-4);
+      p[8] = c0.get_rectangle_center(3);
+      p[8].shift(4);
+      current_picture.output();
+      current_picture.rotate(45, 45);
+      current_picture.shift(10, 0, 3);
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF52.png"
+ alt="[Figure 52. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 52. 
+ <br>
+ </p>
+ 
+    <p>Let's say the complex object in [the previous figure]
+  represents a
+ furnace.  From the point of view of 3DLDF, however, it's not an object
+ at all, and the drawing consists of a collection of unrelated
+ <code>Cuboids</code>, <code>Circles</code>, <code>Rectangles</code>, and <code>Paths</code>. 
+ If we hadn't put it into a <code>Picture</code>, we could still have rotated
+ and shifted it, but only by applying the operations to each of the
+ sub-objects individually.
+ 
+    <p>One consequence of the way <code>Pictures</code> are output in 3DLDF is, that
+ the following code will not work:
+ 
+ <pre class="example">     beginfig(1);
+      Point p(1, 2);
+      Point q(1, 3);
+      out_stream &lt;&lt; "pickup pencircle scaled .5mm;" &lt;&lt; endl;
+      origin.draw(p);
+      out_stream &lt;&lt; "pickup pensquare xscaled .3mm rotated 30;" &lt;&lt; endl;
+      origin.draw(q);
+      current_picture.output();
+      endfig();
+ </pre>
+    <p>This is the MetaPost code that results:
+ 
+ <pre class="example">     beginfig(1);
+      pickup pencircle scaled .5mm;
+      pickup pensquare xscaled .3mm rotated 30;
+      draw (0.000000cm, -3.000000cm) -- (1.000000cm, -1.000000cm);
+      draw (0.000000cm, -3.000000cm) -- (1.000000cm, 0.000000cm);
+      endfig;
+ </pre>
+    <p>It's perfectly legitimate to write
+ <a name="index-raw-MetaPost-code-73"></a>raw MetaPost code to <code>out_stream</code>, as in lines 4 and 6 of this
+ example.  However, the <code>draw()</code> commands do not cause any output to
+ <code>out_stream</code>.  The MetaPost drawing commands are written to
+ <code>out_stream</code> when <code>current_picture.output()</code> is called. 
+ Therefore, the <code>pickup</code> commands are &ldquo;bunched up&rdquo; before the
+ drawing commands. 
+ In this example,
+ setting <code>currentpen</code> to <code>pencircle scaled .5mm</code> has no effect,
+ because it is immediately reset to
+ <code>pensquare xscaled .3mm rotated 30</code> in the MetaPost code, before
+ the <code>draw</code> commands. 
+ It is not possible to change <code>currentpen</code> in this way within a
+ <code>Picture</code>. 
+ Since the <code>draw()</code> commands in the 3DLDF
+ code didn't specify a <var>pen</var> argument,
+ <code>currentpen</code> with its final value is used for both of the MetaPost
+ <code>draw</code> commands.  For any given invocation of
+ <code>Picture::output()</code>, there can only be one value of
+ <code>currentpen</code>.  All other pens must be passed as arguments to the
+ drawing commands.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Projections">Projections</a>
+ <li><a accesskey="2" href="#Focuses-Getstart">Focuses Getstart</a>
+ <li><a accesskey="3" href="#Surface-Hiding">Surface Hiding</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Projections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Focuses-Getstart">Focuses Getstart</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Pictures">Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Pictures">Pictures</a>
+ 
+ </div>
+ 
+ <h3 class="section">9.1 Projections</h3>
+ 
+ <p>In order for a 3D graphic program to be useful, it must be able to
+ make two-dimensional projections of its three-dimensional constructions
+ so that they
+ can be displayed on computer screens and printed out. 
+ These are some of the possible projections:
+ 
+      <dl>
+ <dt>&bull; Parallel projection onto one of the major planes<dd>These projections are trivial, and can be performed by 3DLDF.  They are
+ discussed in the following section.
+ 
+      <br><dt>&bull; Parallel projection onto another plane<dd><!-- !! TO DO: -->
+ I haven't programmed these projections yet, but they might be useful, so
+ I probably will, when I get around to it.
+ 
+      <br><dt>&bull; The perspective projection<dd>This is the projection most people think of, when they think of
+ 3D-graphics.  It is discussed in
+ detail in <a href="#The-Perspective-Projection">The Perspective Projection</a>.
+ 
+      <br><dt>&bull; The isometric and axonometric projections<dd><!-- !! TO DO: -->
+ <a name="index-TO-DO-74"></a>These projections are important for engineering and drafting.  I have
+ not yet implemented them in 3DLDF, but they are on my list of &ldquo;Things
+ To Do&rdquo;. 
+ <!-- !! Get reference, Böttcher and ?? @cite{Technisches Zeichnen}. -->
+ </dl>
+ 
+    <p>The function <code>Picture::output()</code> takes a <code>const unsigned
+ short</code> argument specifying the projection to be used.  The user should
+ probably avoid using explicit <code>unsigned shorts</code>, but should use the
+ constants defined for this purpose in the
+ <dfn>namespace</dfn> <code>Projections</code>.<a rel="footnote" href="#fn-19" name="fnd-19"><sup>19</sup></a>
+ The constants are <code>PERSP</code>, <code>PARALLEL_X_Y</code>,
+ <code>PARALLEL_X_Z</code>,
+ <code>PARALLEL_Z_Y</code>, <code>AXON</code>, and <code>ISO</code>.  The latter two should
+ not be used, because the axonometric and isometric projections have not
+ yet been implemented.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Parallel-Projections">Parallel Projections</a>
+ <li><a accesskey="2" href="#The-Perspective-Projection">The Perspective Projection</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Parallel-Projections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#The-Perspective-Projection">The Perspective Projection</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Projections">Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Projections">Projections</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">9.1.1 Parallel Projections</h4>
+ 
+ <p>When a <code>Picture</code> is projected onto the x-y plane, the
+ x and y-values from the <code>world_coordinates</code> of the <code>Points</code>
+ belonging to the objects on the
+ <code>Picture</code> are copied to
+ their <code>projective_coordinates</code>, which are
+ used in the MetaPost code written to <code>out_stream</code>. 
+ If a <code>Picture</code> <var>p</var> contains an object in the x-y plane,
+ or in a plane parallel to the x-y plane, then
+ the result of <var>p</var><code>.output(Projections::PARALLEL_X_Y)</code> is more-or-less
+ equivalent to just using MetaPost without 3DLDF.
+ 
+ <pre class="example">     Rectangle r(origin, 3, 3, 90);
+      Circle c(origin, 3, 90);
+      c *= r.shift(0, 0, 5);
+      r.draw();
+      c.draw();
+      current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF53.png"
+ alt="[Figure 53. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 53. 
+ <br>
+ </p>
+ 
+    <p>If the objects do not lie in the x-y plane, or a plane parallel to the
+ x-y plane, then the projection will be distorted:
+ 
+ <pre class="example">     current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF54.png"
+ alt="[Figure 54. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 54. 
+ <br>
+ </p>
+ 
+    <p><code>Picture::output()</code> can be called with an additional <code>real</code>
+ argument <var>factor</var> for magnifying or shrinking the <code>Picture</code>.
+ 
+ <!-- !! TO DO:  Try using the code above and removing here.  Change -->
+ <!-- factor, if necessary.  LDF 2003.08.15. -->
+ <pre class="example">     Rectangle r(origin, 4, 4, 90, 60);
+      Circle c(origin, 4, 90, 60);
+      c *= r.shift(0, 0, 5);
+      r.filldraw(black, gray);
+      c.unfilldraw(black);
+      current_picture.output(Projections::PARALLEL_X_Y, .5);
+      current_picture.shift(2.5);
+      current_picture.output(Projections::PARALLEL_X_Y);
+      current_picture.shift(1);
+      current_picture.output(Projections::PARALLEL_X_Y, 2);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF55.png"
+ alt="[Figure 55. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 55. 
+ <br>
+ </p>
+ 
+    <p>Parallel projection onto the x-z and z-y planes are completely analogous
+ to parallel projection onto the x-y plane.
+ 
+ <div class="node">
+ <a name="The-Perspective-Projection"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Parallel-Projections">Parallel Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Projections">Projections</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">9.1.2 The Perspective Projection</h4>
+ 
+ <p>The perspective projection obeys the laws of
+ <dfn>linear perspective</dfn>. 
+ In 3DLDF, it is performed by means of a
+ transformation, whose effect is, to the
+ best of my knowledge,
+ exactly equivalent to the result of a perspective projection done by
+ hand using vanishing points and rulers.
+ 
+    <p>It is very helpful to the artist to understand the laws of linear
+ perspective, and to know how to make a perspective drawing by hand.<a rel="footnote" href="#fn-20" name="fnd-20"><sup>20</sup></a>
+ However, it is a very tedious and error-prone procedure (I know, I've
+ done it).  One of my main motivations for writing 3DLDF was so I
+ wouldn't have to do it anymore.
+ 
+ <!-- !! TO DO:  Mention somewhere, that the ground plane isn't important, -->
+ <!-- and that more could be said on the subject.  For example, what -->
+ <!-- happens when the line of sight is not parallel to the ground plane, -->
+ <!-- and how this is important when using rulers, but not when using -->
+ <!-- transformations.  LDF 2003.08.15. -->
+    <p>[next figure]
+  shows a perspective construction, the way it
+ could be done by hand. 
+ The point of view, or <dfn>focus</dfn> is located 6cm from
+ the picture plane, and 4cm above the ground (or x-z) plane at the point
+ (0, 4, -6). 
+ The rectangle R lies in the ground  plane, with the point r_0 at
+ (2, 0, 1.5).  The right side of R, with length = 2<span class="dmn">cm</span>
+ lies at an angle
+ of 40 to the ground line, which corresponds to the intersection line
+ of the ground plane with the picture plane, and the left side, with
+ length = 5<span class="dmn">cm</span>, at an angle of
+ 90 degrees - 40 degrees = 50 degrees
+ to the ground line.
+ 
+ <!-- !! NOTE:  I haven't been able to get the colons lined up the way I'd -->
+ <!-- like for the explanations of the abbreviations.  LDF 2003.08.15. -->
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF56.png"
+ alt="[Figure 56. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 56. 
+ <br>
+ </p>
+ 
+    <p>While it's possible to use 3DLDF to make a perspective construction
+ in the traditional way, as [the previous figure]
+  shows, the code for [next figure]
+ 
+    <p>achieves the same result more efficiently:
+ 
+ <pre class="example">     default_focus.set(0, 4, -6, 0, 4, 6, 6);
+      Rectangle r(origin, 2, 5, 0, 40);
+      Point p(2, 0, 1.5);
+      r.shift(p - r.get_point(0));
+      r.draw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF57.png"
+ alt="[Figure 57. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 57. 
+ <br>
+ </p>
+ 
+    <p>In [the second-to-last figure]
+ , it was
+ convenient to start with the corner point r_0;
+ if we needed the center of  R, it would have to be found from the
+ corner points. 
+ However, in 3DLDF, <code>Rectangles</code> are most often constructed about
+ the center.  Therefore, in [next figure]
+ , R is first
+ constructed about the origin, with the
+ rotation about the y-axis passed as an argument to the constructor. 
+ It is then shifted such that <code>*(</code><var>R</var><code>.points[0])</code>, the first
+ (or zeroth, if you will) <code>Point</code> on R comes to lie at
+ (2, 0, 1.5).
+ 
+    <p>Unlike the other transformations currently
+ used in 3DLDF, the perspective transformation is non-affine.  Affine
+ transformations maintain parallelity of lines, while the rules of
+ perspective state that parallel lines, with one exception, appear to
+ recede toward a
+ <!-- !! I believe what I've put in the following footnote is correct, but -->
+ <!-- maybe it's not.  I've had to try to figure it out myself;  I don't -->
+ <!-- remember ever seeing this spelled out before. -->
+ <dfn>vanishing point</dfn>.<a rel="footnote" href="#fn-21" name="fnd-21"><sup>21</sup></a>
+ 
+    <p>In [the second-to-last figure]
+ , the lines
+ from r_0 to r_1 and from r_3 to r_2
+ appear to vanish
+ toward the right-hand 40 degrees
+  vanishing point, while
+ the lines from r_0 to r_3 and from r_1 to r_2
+ appear to vanish
+ toward the left-hand 50 degrees
+  vanishing point. 
+ The lower the angle of a
+ vanishing point, the further away it is from the center of vision, as
+ [next figure]
+  shows:
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF58.png"
+ alt="[Figure 58. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 58. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , the 0.5 degrees
+  vanishing point is nearly
+ 5 and 3/4
+ meters away from the CV, and a
+ line receding to it will be very
+ nearly horizontal.  However, the distance from the focus to the CV is
+ only 5<span class="dmn">cm</span>.  As this distance increases, the distance from the
+ CV to a given vanishing point increases proportionately. 
+ If the distance is 30<span class="dmn">cm</span>, a more reasonable value
+ for a drawing, then the x-coordinate of VP 10 degrees
+  is 170.138<span class="dmn">cm</span>, that
+ of VP 5 degrees
+  is 342.902<span class="dmn">cm</span>, and that of VP 0.5 degrees
+  is 3437.66<span class="dmn">cm</span>! 
+ This is the reason
+ why perspective drawings done by hand rarely contain lines receding to
+ the horizon at low angles.
+ 
+    <p>This problem doesn't arise when the perspective transformation is
+ used.  In this case, any angle can be calculated as easily as any other:
+ 
+ <pre class="example">     default_focus.set(0, 4, -6, 0, 4, 6, 6);
+      Rectangle r;
+      Point center(0, 2);
+      r.set(center, 2, 5, 0, 0, 0.5);
+      r.draw();
+      
+      r.set(center, 2, 5, 0, 0, 2.5);
+      r.draw();
+      
+      r.set(center, 2, 5, 0, 0, 5);
+      r.draw();
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF59.png"
+ alt="[Figure 59. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 59. 
+ <br>
+ </p>
+ 
+ <div class="node">
+ <a name="Focuses-Getstart"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Surface-Hiding">Surface Hiding</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Projections">Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Pictures">Pictures</a>
+ 
+ </div>
+ 
+ <h3 class="section">9.2 Focuses</h3>
+ 
+ <p><a name="index-focus-75"></a>The perspective transformation requires a focus;  as a consequence,
+ outputting a <code>Picture</code> requires an object of class
+ <code>Focus</code>. 
+ <code>Picture::output()</code> takes an optional pointer-to-<code>Focus</code>
+ argument, which is 0 by default.  If the default is used, (or 0 is
+ passed explicitly), the global variable <code>default_focus</code> is used. 
+ See <a href="#Focus-Global-Variables">Focus Reference; Global Variables</a>.
+ 
+    <p>A <code>Focus</code> can be thought of as the observer of a scene, or a
+ camera.  It contains a <code>Point position</code> for its location with
+ respect to 3DLDF's coordinate system, and a <code>Point direction</code>,
+ specifying the direction where the observer is looking, or where the
+ camera is pointed.  The <code>Focus</code> can be rotated freely about the
+ line
+ PD,
+ where P stands for <code>position</code> and
+ D
+ for <code>direction</code>,
+ so a <code>Focus</code> contains a third <code>Point up</code>, to indicate which
+ direction will be &ldquo;up&rdquo; on the projection, when a <code>Picture</code> is
+ projected.
+ 
+    <p>The projection plane q
+ will always be perpendicular to
+ the line PD,
+ or to put it another way,
+ the line PD,
+ is normal to q.
+ 
+    <p>Unlike the traditional perspective construction, where the distance from
+ the focus to the center of vision fixes both the location of the focus
+ in space, and its distance to the
+ picture plane,<a rel="footnote" href="#fn-22" name="fnd-22"><sup>22</sup></a>
+ these two parameters can be set independently when the perspective
+ transformation is used. 
+ The distance from a <code>Focus</code> to the picture plane is stored in the
+ data member <code>distance</code>, of type <code>real</code>.
+ 
+    <p>A <code>Focus</code> can be declared using two <code>Point</code> arguments for
+ <code>position</code> and <code>direction</code>, and a <code>real</code> argument for
+ <code>distance</code>, in that order.
+ 
+ <pre class="example">     Point pos(0, 5, -10);
+      Point dir(0, 5, 10);
+      Focus f(pos, dir, 10);
+      
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF60.png"
+ alt="[Figure 60. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 60. 
+ <br>
+ </p>
+ 
+    <p>The &ldquo;up&rdquo; direction is calculated by the <code>Focus</code> constructor
+ automatically.  An optional argument can be used to specify the angle by
+ which to rotate the <code>Focus</code> about
+ the line PD.
+ 
+ <pre class="example">     Point pos(0, 5, -10);
+      Point dir(0, 5, 10);
+      Focus f(pos, dir, 10, 30);
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF61.png"
+ alt="[Figure 61. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 61. 
+ <br>
+ </p>
+ 
+    <p>Alternatively, a <code>Focus</code> can be declared using three <code>real</code>
+ arguments each for the x, y, and z-coordinates of <code>position</code> and
+ <code>direction</code>, respectively, followed by the <code>real</code> arguments
+ for <code>distance</code> and the angle of rotation:
+ 
+ <pre class="example">     Focus f(3, 5, -5, 0, 3, 0, 10, 10);
+      Point center(2, 0, 3);
+      Rectangle r(center, 3, 3);
+      r.draw();
+      current_picture.output(f);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF62.png"
+ alt="[Figure 62. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 62. 
+ <br>
+ </p>
+ 
+    <p><code>Focuses</code> contain two <code>Transforms</code>, <code>transform</code> and <code>persp</code>. 
+ A <code>Focus</code> can be located anywhere in 3DLDF's coordinate system. 
+ However, performing the perspective projection is more convenient, if
+ <code>position</code> and <code>direction</code> both lie on one of the major axes,
+ and the plane of projection corresponds to one of the major planes. 
+ <code>transform</code> is the transformation which would have this affect on
+ the <code>Focus</code>, and is calculated by the <code>Focus</code> constructor. 
+ When a <code>Picture</code> is output using that <code>Focus</code>,
+ <code>transform</code> is applied to all of the <code>Shapes</code> on the
+ <code>Picture</code>, maintaining the relationship between the <code>Focus</code>
+ and the <code>Shapes</code>, while making it easier to calculate the
+ projection.  The <code>Focus</code> need never be
+ transformed by <code>transform</code>. 
+ The actual perspective transformation is stored
+ in <code>persp</code>.
+ 
+    <p><code>Focuses</code> can be moved by using one of the setting functions, which
+ take the same arguments as the constructors. 
+ <!-- !! TO DO: -->
+ Currently, there are no affine transformation functions for moving
+ <code>Focuses</code>, but I plan to add them soon.  If 3DLDF is used for
+ making
+ <a name="index-animation-76"></a>animation, resetting the <code>Focus</code> can be used to simulate camera
+ movements:
+ 
+ <pre class="example">     beginfig(1);
+      Point pos(2, 10, 3);
+      Point dir(2, -10, 3);
+      Focus f;
+      Point center(2, 0, 3);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+          f.set(pos, dir, 10, (15 * i));
+          Rectangle r(center, 3, 3);
+          r.draw();
+          current_picture.output(f);
+          current_picture.clear();
+          pos.shift(1, 1, 0);
+          dir.rotate(0, 0, 10);
+        }
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF63.png"
+ alt="[Figure 63. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 63. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , <code>current_picture</code> is output 5 times within a single
+ MetaPost figure.  Since the file passed to MetaPost is called
+ <samp><span class="file">persp.mp</span></samp>, the file of Encapsulated PostScript (EPS) code
+ containing [the previous figure]
+  is called <samp><span class="file">persp.1</span></samp>. 
+ <a name="index-animation-77"></a>To use this technique for making an animation, it's necessary to output
+ the <code>Picture</code> into multiple MetaPost figures.
+ 
+ <pre class="example">     Point pos(2, 10, 3);
+      Point dir(2, -10, 3);
+      Focus f;
+      Point center(2, 0, 3);
+      for (int i = 0; i &lt; 5; ++i)
+        {
+          f.set(pos, dir, 10, (15 * i));
+          Rectangle r(center, 3, 3);
+          r.draw();
+          beginfig(i+1);
+          current_picture.output(f);
+          endfig();
+          current_picture.clear();
+          pos.shift(1, 1, 0);
+          dir.rotate(0, 0, 10);
+        }
+ </pre>
+    <p>Now, running MetaPost on <samp><span class="file">persp.mp</span></samp> generates the EPS files
+ <samp><span class="file">persp.1</span></samp>, <samp><span class="file">persp.2</span></samp>, <samp><span class="file">persp.3</span></samp>, <samp><span class="file">persp.4</span></samp>, and
+ <samp><span class="file">persp.5</span></samp>, containing the five separate drawings of <var>r</var>. 
+ <!-- !! TO DO:  Add a node ``Animation''.  When I've done so, put a cross -->
+ <!-- reference here.  LDF 2003.08.15. -->
+ 
+ <div class="node">
+ <a name="Surface-Hiding"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focuses-Getstart">Focuses Getstart</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Pictures">Pictures</a>
+ 
+ </div>
+ 
+ <h3 class="section">9.3 Surface Hiding</h3>
+ 
+ <!-- !! TO DO:  Write about z-buffers, and how scan converting is needed -->
+ <!-- to use them.  Also, show how to do surface hiding of the two -->
+ <!-- rectangles by hand! -->
+ <p>In [next figure]
+ , <code>Circle</code> <var>c</var> lies in front of <code>Rectangle</code>
+ <var>r</var>. 
+ Since <var>c</var> is drawn and not filled, <var>r</var> is visible behind
+ <var>c</var>.
+ 
+ <pre class="example">     default_focus.set(1, 3, -5, 0, 3, 5, 10);
+      Point p(0, -2, 5);
+      Rectangle r(p, 3, 4, 90);
+      r.draw();
+      Point q(2, -2, 3);
+      Circle c(q, 3, 90);
+      c.draw();
+      current_picture.output();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF64.png"
+ alt="[Figure 64. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 64. 
+ <br>
+ </p>
+ 
+    <p>If instead, <var>c</var> is filled or filldrawn, only the parts of <var>r</var> that are not
+ covered by <var>c</var> should be visible:
+ 
+ <pre class="example">     r.draw();
+      c.filldraw();
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF65.png"
+ alt="[Figure 65. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 65. 
+ <br>
+ </p>
+ 
+    <p>What parts of <code>r</code> are covered depend on the point of view, i.e.,
+ the position and direction of the <code>Focus</code> used for outputting the
+ <code>Picture</code>:
+ 
+ <pre class="example">     default_focus.set(8, 0, -5, 5, 3, 5, 10);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF66.png"
+ alt="[Figure 66. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 66. 
+ <br>
+ </p>
+ 
+    <p><a name="index-surface-hiding-78"></a><a name="index-hidden-surface-algorithm-79"></a>Determining what objects cover other objects in a program for 3D
+ graphics is called
+ <dfn>surface hiding</dfn>,
+ and is performed by a
+ <dfn>hidden surface algorithm</dfn>.  3DLDF currently has a very primitive
+ hidden surface algorithm that only works for the most simple cases.
+ 
+    <p><a name="index-painter_0027s-algorithm-80"></a>The hidden surface algorithm used in 3DLDF is a
+ <dfn>painter's algorithm</dfn>, which means that the objects that are
+ furthest away from the <code>Focus</code> are drawn first, followed by the
+ objects that are closer, which may thereby cover them.  In order to make
+ this possible, the <code>Shapes</code> on a <code>Picture</code> must be sorted
+ before they are output.  They are sorted according to the z-values in
+ the <code>projective_coordinates</code> of the <code>Points</code> belonging to the
+ <code>Shape</code>.  This may seem strange, since the
+ projection is two-dimensional and only the x and y-values from
+ <code>projective_coordinates</code> are written to <code>out_stream</code>. 
+ However, the perspective transformation also produces a z-coordinate,
+ which indicates the distance of the <code>Points</code> from the <code>Focus</code>
+ in the z-dimension.
+ 
+    <p>The problem is, that all <code>Shapes</code>, except <code>Points</code> themselves,
+ consist of multiple <code>Points</code>, that may have different
+ z-coordinates.  3DLDF currently does not yet have a satisfactory way of
+ dealing with this situtation.  In order to try to cope with it, the user
+ can specify four different ways of sorting the <code>Shapes</code>:  They
+ can be sorted according to the maximum z-coordinate, the
+ minimum z-coordinate, the mean of the maximum and minimum z-coordinate
+ (max + min) / 2,
+ and not sorted. 
+ In the last case, the <code>Shapes</code> are output in the order of the
+ drawing and filling commands in the user code. 
+ The z-coordinates referred to are those in
+ <code>projective_coordinates</code>, and will have been calculated for a
+ particular <code>Focus</code>.
+ 
+    <p>The function <code>Picture::output()</code> takes a
+ <code>const unsigned short</code> <var>sort_value</var> argument that specifies
+ which style of sorting
+ should be used.  The namespace <code>Sorting</code> contains the following
+ constants which should be used for <var>sort_value</var>: <code>MAX_Z</code>,
+ <code>MIN_Z</code>, <code>MEAN_Z</code>, and <code>NO_SORT</code>.  The default is
+ <code>MAX_Z</code>.
+ 
+    <p>3DLDF's primitive hidden surface algorithm <em>cannot</em> work for
+ objects that intersect.  The following examples demonstrate why not:
+ 
+ <pre class="example">     using namespace Sorting;
+      using namespace Colors;
+      using namespace Projections;
+      default_focus.set(5, 3, -10, 3, 1, 1, 10, 180);
+      Rectangle r0(origin, 3, 4, 45);
+      Rectangle r1(origin, 2, 6, -45);
+      r0.draw();
+      r1.draw();
+      current_picture.output(default_focus, PERSP, 1, MAX_Z);
+      r0.show("r0:");
+      -| r0:
+      fill_draw_value == 0
+      (-1.5, -1.41421, -1.41421) -- (1.5, -1.41421, -1.41421) --
+      (1.5, 1.41421, 1.41421) -- (-1.5, 1.41421, 1.41421)
+      -- cycle;
+      
+      r0.show("r0:", 'p');
+      -| r0:
+      fill_draw_value == 0
+      Perspective coordinates.
+      (-5.05646, -4.59333, -0.040577) -- (-2.10249, -4.86501, -0.102123) --
+      (-1.18226, -1.33752, 0.156559) -- (-3.51276, -1.2796, 0.193084)
+      -- cycle;
+      
+      r1.show("r1:");
+      -| r1:
+      fill_draw_value == 0
+      (-1, 2.12132, -2.12132) -- (1, 2.12132, -2.12132) --
+      (1, -2.12132, 2.12132) -- (-1, -2.12132, 2.12132)
+      -- cycle;
+      
+      r1.show("r1:", 'p');
+      -| r1:
+      fill_draw_value == 0
+      Perspective coordinates.
+      (-5.09222, -0.995681, -0.133156) -- (-2.98342, -1.03775, -0.181037) --
+      (-1.39791, -4.05125, 0.208945) -- (-2.87319, -3.93975, 0.230717)
+      -- cycle;
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF67.png"
+ alt="[Figure 67. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 67. 
+ <br>
+ </p>
+ 
+    <p>In [the previous figure]
+ , the <code>Rectangles</code> r_0 and r_1 intersect along the
+ x-axis.  The z-values of the <code>world_coordinates</code> of r_0 are
+ -1.41421 and 1.41421 (two <code>Points</code> each), while those of r_1
+ are 2.12132 and  -2.12132.  So r_1 has two <code>Points</code> with
+ z-coordinates greater than the z-coordinate of any <code>Point</code>
+ on r_0, and two <code>Points</code> with z-coordinates less than the
+ z-coordinate of any <code>Point</code> on r_0.  The
+ <code>Points</code> on r_0 and r_1 all have different z-values in
+ their <code>projective_coordinates</code>, but r_1 still has a <code>Point</code>
+ with a z-coordinate greater than that of any of the <code>Points</code> on
+ r_0, and one with a z-coordinate less than that of any of the
+ <code>Points</code> on r_0.
+ 
+    <p>In [next figure]
+ , the <code>Shapes</code> on <code>current_picture</code> are sorted
+ according to the maximum z-values of the <code>projective_coordinates</code>
+ of the <code>Points</code> belonging to the <code>Shapes</code>.  r_1 is
+ filled and drawn first,
+ because it has the <code>Point</code> with the positive z-coordinate of
+ greatest magnitude. 
+ When subsequently r_0 is drawn, it covers part of the top of
+ r_1, which lies in front of r_0, and should be visible:
+ 
+ <pre class="example">     current_picture.output(default_focus, PERSP, 1, MAX_Z);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF68.png"
+ alt="[Figure 68. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 68. 
+ <br>
+ </p>
+ 
+    <p>In [next figure]
+ , the <code>Shapes</code> on <code>current_picture</code> are sorted
+ according to the minimum z-values of the <code>projective_coordinates</code>
+ of the <code>Points</code> belonging to the <code>Shapes</code>.  <code>r1</code> is drawn
+ and filled last, because
+ it has the <code>Point</code> with the negative z-coordinate of greatest
+ magnitude. 
+ It thereby covers the bottom part of
+ <code>r0</code>, which lies in front of <code>r1</code>, and should be visible.
+ 
+ <pre class="example">     current_picture.output(default_focus, PERSP, 1, MIN_Z);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF69.png"
+ alt="[Figure 69. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 69. 
+ <br>
+ </p>
+ 
+    <p>Neither sorting by the mean z-value in the
+ <code>projective_coordinates</code>, nor suppressing sorting does any good. 
+ In each case, one <code>Rectangle</code> is always drawn and filled last,
+ covering parts of the other that lie in front of the first.
+ 
+    <p>3DLDF's hidden surface algorithm will fail wherever objects intersect,
+ not just where one extends past the other in both the positive and
+ negative z-directions.
+ 
+ <pre class="example">     Rectangle r(origin, 3, 4, 45);
+      Circle c(origin, 2, -45);
+      r.filldraw();
+      c.filldraw(black, gray);
+      current_picture.output(default_focus, PERSP, 1, NO_SORT);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF70.png"
+ alt="[Figure 70. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 70. 
+ <br>
+ </p>
+ 
+    <p>Even where objects don't intersect, their projections may.  In order to
+ handle these cases properly, it is necessary to break up the
+ <code>Shapes</code> on a <code>Picture</code> into smaller <code>Shapes</code>, until
+ there are none that intersect or whose projections intersect.  Then, any
+ of the three methods of sorting described above can be used to sort the
+ <code>Shapes</code>, and they can be output.
+ 
+    <p>Before this can be done, 3DLDF must be able to find the intersections of
+ all of the different kinds of <code>Shapes</code>.  If 3DLDF converted solids
+ to polyhedra and curves to sequences of line segments, this would reduce
+ to the problem of finding the intersections of lines and planes, however
+ it does not yet do this.
+ 
+    <p>Even if it did, a fully functional hidden surface algorithm must compare
+ each <code>Shape</code> on a <code>Picture</code> with every other <code>Shape</code>. 
+ Therefore, for n <code>Shapes</code>, there will be
+ n! / ((n - r)! r!) 
+ (possibly time-consuming) comparisons.
+ 
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF71.png"
+ alt="[Figure 71. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 71. 
+ <br>
+ </p>
+ 
+ <!-- I've put this here, so that it doesn't interfere with the Emacs-Lisp -->
+ <!-- routine I'm using to insert the figure numbers for HTML and Info -->
+ <!-- output.  LDF 2003.12.16. -->
+    <p>Clearly, such a hidden surface
+ algorithm would considerably increase run-time.
+ 
+    <p>Currently, all of the <code>Shapes</code> on a <code>Picture</code> are output, as
+ long as they lie completely within the boundaries passed as arguments to
+ <code>Picture::output()</code>. 
+ See <a href="#Outputting-Pictures">Pictures; Outputting</a>.  It
+ would be more efficient to suppress output for them, if they are
+ completely covered by other objects.  This also requires comparisions,
+ and could be implemented together with a fully-functional hidden surface
+ algorithm.
+ 
+    <p>Shadows, reflections, highlights and shading are all effects requiring
+ comparing each <code>Shape</code> with every other <code>Shape</code>, and could
+ greatly increase run-time.
+ 
+ <!-- intersct.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Intersections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Pictures">Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">10 Intersections</h2>
+ 
+ <p><a name="index-intersection-81"></a><a name="index-intersection-points-82"></a><a name="index-Path-intersections-83"></a><a name="index-output-file-84"></a><a name="index-arbitrary-Path-85"></a>There are no functions for finding the intersection points of two (or
+ more) arbitrary <code>Paths</code>.  This is impossible, so long as 3DLDF
+ outputs MetaPost code. 
+ 3DLDF only &ldquo;knows&rdquo; about the <code>Points</code> on a
+ <code>Path</code>;  it doesn't actually generate the curve or other figure
+ that passes through the <code>Points</code>, and consequently doesn't &ldquo;know&rdquo;
+ how it does this.
+ 
+    <p><a name="index-arbitrary-Path-86"></a><a name="index-intersection-87"></a><a name="index-intersection-points-88"></a><a name="index-Path-intersections-89"></a><a name="index-connectors-90"></a><a name="index-Path-connectors-91"></a>In addition, an arbitrary <code>Path</code> can contain connectors. 
+ In 3DLDF, the connectors are
+ merely <code>strings</code> and are written verbatim to the output file,
+ however, in MetaPost they influence the form of a <code>Path</code>.
+ 
+    <p><a name="index-non_002darbitrary-Path-92"></a><a name="index-intersection-93"></a><a name="index-intersection-points-94"></a><a name="index-Path-intersections-95"></a>3DLDF can, however, find the intersection points of some
+ <em>non-arbitrary</em> <code>Paths</code>.  So far, it can find the intersection
+ point of the following combinations of <code>Paths</code>:
+ 
+    <p><a name="index-Point_003a_003aintersection_005fpoints-96"></a>
+      <ol type=1 start=1>
+ <li>Two linear <code>Paths</code>, i.e., <code>Paths</code>
+ for which <code>Path::is_linear()</code> returns <code>true</code>
+ (see <a href="#Querying-Paths">Path Reference; Querying</a>). 
+ In addition, the <code>static Point</code> member function
+ <code>Point::intersection_points()</code> can be called with four <code>Point</code>
+ arguments.  The first and second arguments are treated as the end points
+ of one line, and the third and fourth arguments as the end points of the
+ other.
+ 
+      <li>A line and a <code>Polygon</code>.  Currently, <code>Reg_Polygon</code> and
+ <code>Rectangle</code> are the only classes derived from <code>Polygon</code>.
+ 
+      <li>Two <code>Polygons</code>.
+ 
+      <li>A line and a Regular Closed Plane Curve (<code>Reg_Cl_Plane_Curve</code>,
+ see <a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>).  Currently,
+ <code>Ellipse</code> and <code>Circle</code> are the only classes derived from
+ <code>Reg_Cl_Plane_Curve</code>.
+ 
+      <li>Two <code>Ellipses</code>.  Since a <code>Circle</code> is also an <code>Ellipse</code>,
+ one or both of the <code>Ellipses</code> may be a <code>Circle</code>. 
+ See <a href="#Ellipse-Intersections">Ellipse Reference; Intersections</a>.
+         </ol>
+ 
+    <p>Adding more functions for finding the intersections of various geometric
+ figures is one of my main priorities with respect to extending 3DLDF.
+ 
+    <p>There are currently no special
+ functions for finding the intersection points
+ of a line and a <code>Circle</code> or two <code>Circles</code>.  Since the
+ <code>class Circle</code> is derived from <code>class Ellipse</code>,
+ <code>Circle::intersection_points()</code> resolves to
+ <code>Ellipse::intersection_points()</code>, which, in turn, calls
+ <code>Reg_Cl_Plane_Curve::intersection_points()</code>. 
+ This does the trick, but it's much easier to find the intersections for
+ <code>Circles</code> that it is for <code>Ellipses</code>.  In particular, the
+ intersections of two coplanar <code>Circles</code> can be found
+ algebraically, whereas I've had to implement a numerical solution for
+ the case of two coplanar <code>Ellipses</code> with different centers and/or
+ axis orientation.  It may also be worthwhile to write
+ a specialization for
+ finding the intersection points of a <code>Circle</code> and an
+ <code>Ellipse</code>.
+ 
+    <p><a name="index-intersection-theory-97"></a><a name="index-theory-of-intersection-98"></a><a name="index-future-plans-99"></a><a name="index-contributing-to-3DLDF-100"></a>The theory of intersections is a fascinating and non-trivial branch of
+ mathematics.<a rel="footnote" href="#fn-23" name="fnd-23"><sup>23</sup></a>
+ As I learn more about it, I plan to define more
+ <code>classes</code> to represent various curves (two-dimensional ones to
+ start with) and functions for finding their intersection points.
+ 
+ <!-- instlrun.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Installing-and-Running-3DLDF"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Intersections">Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">11 Installing and Running 3DLDF</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Installing-3DLDF">Installing 3DLDF</a>
+ <li><a accesskey="2" href="#Running-3DLDF">Running 3DLDF</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Installing-3DLDF"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Running-3DLDF">Running 3DLDF</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ 
+ </div>
+ 
+ <h3 class="section">11.1 Installing 3DLDF</h3>
+ 
+ <p>3DLDF is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/3dldf">http://ftp.gnu.org/gnu/3dldf</a>. 
+ The official 3DLDF website is
+ <a href="http://www.gnu.org/software/3dldf">http://www.gnu.org/software/3dldf</a>. 
+ The &ldquo;tarball&rdquo;, i.e., the compressed archive file
+ <samp><span class="file">3DLDF-1.1.5.1.tar.gz</span></samp> unpacks into a directory called
+ <samp><span class="file">/3DLDF-1.1.5.1/</span></samp>.
+ 
+    <p>On a typical Unix-like system, entering the following commands
+ at the command line in a shell will unpack the 3DLDF distribution. 
+ Please note that the form of the commands may differ on your system.
+ 
+ <pre class="example">     gunzip 3DLDF-1.1.5.1.tar.gz
+      tar xpvf 3DLDF-1.1.5.1.tar
+ </pre>
+    <p>The &lsquo;<samp><span class="samp">p</span></samp>&rsquo; option to <samp><span class="command">tar</span></samp> ensures that the files will have
+ the same permissions as when they were packed.
+ 
+    <p>The directory <samp><span class="file">3DLDF-1.1.5.1/</span></samp> contains a
+ <samp><span class="command">configure</span></samp> script, which should
+ be called from the command line in the shell, using the absolute path of
+ <samp><span class="file">3DLDF-1.1.5.1/</span></samp> as the prefix argument.  For example, if
+ the path is <samp><span class="file">/usr/local/mydir/3DLDF-1.1.5.1/</span></samp>,
+ <samp><span class="command">configure</span></samp> should be invoked as follows:
+ 
+ <pre class="example">     cd 3DLDF-1.1.5.1
+      configure --prefix=/usr/local/mydir/3DLDF-1.1.5.1/
+ </pre>
+    <p><samp><span class="command">configure</span></samp> generates a <samp><span class="file">Makefile</span></samp>
+ from the <samp><span class="file">Makefile.in</span></samp> in <samp><span class="file">3DLDF-1.1.5.1/</span></samp>, and
+ in each of the subdirectories <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>,
+ <samp><span class="file">3DLDF-1.1.5.1/DOC</span></samp>,
+ and <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO</span></samp>. 
+ Now, <samp><span class="command">make install</span></samp> causes the 3DLDF to be built. 
+ The executable is called <samp><span class="file">3dldf</span></samp>.
+ 
+    <p>See the files <samp><span class="file">README</span></samp> and <samp><span class="file">INSTALL</span></samp> in the 3DLDF distribution
+ for more information.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Template-Functions">Template Functions</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Template-Functions"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Installing-3DLDF">Installing 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Installing-3DLDF">Installing 3DLDF</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">11.1.1 Template Functions</h4>
+ 
+ <p><a name="index-templates-101"></a><a name="index-template-functions-102"></a><a name="index-function-templates-103"></a>3DLDF 1.1.5 is the first release that contains <dfn>template functions</dfn>,
+ namely
+ <code>template &lt;class C&gt; C* create_new()</code>, which is defined in
+ <samp><span class="file">creatnew.web</span></samp>, and
+ <code>template &lt;class Real&gt; Real get_second_largest()</code>, which is defined
+ in <code>gsltmplt.web</code>. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, and
+ <a href="#Get-Second-Largest-Real">Get Second Largest Real</a>.
+ 
+    <p>In order for template functions to be instantiated correctly, their
+ <em>definitions</em> must be available in each compilation unit where
+ specializations are declared or used.  For non-template functions, it
+ suffices for their <em>declarations</em> to be available, and their
+ definitions are found at link-time.  For this reason, the
+ definitions of <code>create_new()</code> and <code>get_second_largest()</code> are
+ in their own CWEB files, and are written to their own header files.  The
+ latter are included in the other CWEB files that need them.
+ 
+    <p>In addition, &lsquo;<samp><span class="samp">AM_CXXFLAGS = -frepo</span></samp>&rsquo; has been added to the file
+ <samp><span class="file">Makefile.am</span></samp> in <samp><span class="file">3DLDF-1.1.5/CWEB/</span></samp>, so that the C++
+ 
+    <p>compiler is called using the &lsquo;<samp><span class="samp">-frepo</span></samp>&rsquo; option. 
+ The manual <cite>Using and Porting the GNU Compiler
+ Collection</cite> explains this as follows:
+ 
+    <blockquote>
+ &ldquo;Compile your template-using code with &lsquo;<samp><span class="samp">-frepo</span></samp>&rsquo;. The compiler will
+ generate files with the extension <samp><span class="file">.rpo</span></samp> listing all of the template
+ instantiations used in the corresponding object files which could be
+ instantiated there; the link wrapper, &lsquo;<samp><span class="samp">collect2</span></samp>&rsquo;, will then update the
+ <samp><span class="file">.rpo</span></samp> files to tell the compiler where to place those instantiations and
+ rebuild any affected object files. The link-time overhead is negligible
+ after the first pass, as the compiler will continue to place the
+ instantiations in the same files.&rdquo;<a rel="footnote" href="#fn-24" name="fnd-24"><sup>24</sup></a>
+ </blockquote>
+ 
+    <p>The first time the executable <samp><span class="file">3dldf</span></samp> is built, the files that use
+ the template functions are recompiled one or more times, and the linker
+ is also called several times.  This doesn't happen anymore, once the
+ <samp><span class="file">.rpo</span></samp> files exist.
+ 
+    <p>Template instantiation differs from compiler to compiler, so using
+ template functions will tend to make 3DLDF less portable.  I am no
+ longer able to compile it on the DECalpha Personal Workstation I had
+ been using with the DEC C++
+  compiler. 
+ See <a href="#Ports">Ports</a>, for more information.
+ 
+ <div class="node">
+ <a name="Running-3DLDF"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Installing-3DLDF">Installing 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>
+ 
+ </div>
+ 
+ <h3 class="section">11.2 Running 3DLDF</h3>
+ 
+ <p>To use 3DLDF, call
+ <samp><span class="command">make run</span></samp> from the command line in the
+ shell.  The working directory should be
+ <samp><span class="file">3DLDF-1.1.5.1/</span></samp> or <samp><span class="file">3DLDF-1.1.5.1/CWEB</span></samp>. 
+ Either will work, but the latter may be more convenient, because
+ this is the location of the CWEB, TeX and MetaPost files that you'll
+ be editing. 
+ Alternatively, call <samp><span class="command">ldfr</span></samp>, which is merely a
+ shell script that calls <samp><span class="command">make run</span></samp>. 
+ This takes care of running <samp><span class="command">3dldf</span></samp>, MetaPost, TeX,
+ and <samp><span class="command">dvips</span></samp>, producing a PostScript file containing your
+ drawings.  You can display the latter on your terminal using Ghostview
+ or some other
+ PostScript viewer, print it out, and whatever else you like to do with
+ PostScript files.
+ 
+    <p>However, you can also perform the actions performed by
+ <samp><span class="command">make run</span></samp> by hand, by writing your own shell
+ scripts, by defining Emacs-Lisp commands, or in other ways.  Even if you
+ choose to use <samp><span class="command">make run</span></samp>, it's important to understand what it
+ does.  The following explains how to do this by hand.
+ 
+    <p>The CWEB source files for 3DLDF are in the subdirectory
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp>.  They
+ must be <samp><span class="command">ctangled</span></samp>, and the resulting C++
+  files must be
+ compiled and
+ linked, in order to create the executable file <samp><span class="file">3dldf</span></samp>. 
+ The C++
+  files and header files generated by <samp><span class="command">ctangle</span></samp>,
+ the object files generated by the compiler, and the executable
+ <samp><span class="file">3dldf</span></samp> all  reside in <samp><span class="file">3DLDF-1.1.5.1/CWEB/</span></samp>. Therefore, the
+ latter must be your working directory.
+ 
+    <p>Since 3DLDF has no input routine as yet,
+ as explained in <a href="#No-Input-Routine">No Input Routine</a>,
+ it is necessary to add C++
+  code to the function <code>main()</code> in
+ <samp><span class="file">main.web</span></samp>, and/or in a separate function in another file.  In the
+ latter case, the function containing the user code must be invoked in
+ <code>main()</code>.  Look for the line &ldquo;Your code here!&rdquo; in
+ <samp><span class="file">main.web</span></samp>.
+ 
+    <p>This is an example of what you could write in <code>main()</code>. 
+ Feel free to make it more complicated, if you wish.
+ 
+ <pre class="example">     beginfig(1);
+      default_focus.set(2, 3, -10, 2, 3, 10, 20);
+      Rectangle R(origin, 5, 3);
+      Circle C(origin, 3, 90);
+      C.half(180).filldraw(black, light_gray);
+      R.filldraw();
+      C.half().filldraw(black, light_gray);
+      Point p = C.get_point(4);
+      p.shift(0, -.5 * p.get_y());
+      p.label("$C$", "");
+      Point q = R.get_mid_point(0);
+      q.shift(0, 0, -.5 * q.get_z());
+      q.label("$R$", "");
+      current_picture.output(default_focus, PERSP, 1, NO_SORT);
+      endfig(1);
+ </pre>
+    <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF72.png"
+ alt="[Figure 72. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 72. 
+ <br>
+ </p>
+ 
+      <ol type=1 start=1>
+ <li>Save <samp><span class="file">main.web</span></samp>, and any other CWEB files you've changed. 
+ Since these files have changed, they must be <samp><span class="command">ctangled</span></samp>, and the
+ resulting C++
+  files must be recompiled.  If you've changed any files
+ other than
+ <samp><span class="file">main.web</span></samp>, <samp><span class="command">ctangle</span></samp> will also generate a header
+ file for each of these files.  If a header file differs from the version
+ that existed before <samp><span class="command">ctangle</span></samp> was run, all of the C++
+  files
+ that depend on it must be recompiled.  Then <samp><span class="file">3dldf</span></samp> must be
+ relinked.  To do this, call <samp><span class="command">make 3dldf</span></samp> from the command line.
+ 
+      <p>If you've made any errors in typing your code, the
+ compiler should have issued error messages, so go back into
+ the appropriate CWEB file and correct your errors.  Then call
+ <samp><span class="command">make 3dldf</span></samp> again.
+ 
+      <li>Call <samp><span class="command">CWEB/3dldf</span></samp> at the command line.  It writes a
+ file of MetaPost code called <samp><span class="file">3DLDFput.mp</span></samp>.
+ 
+      <li>Run MetaPost on the file <samp><span class="file">3DLDFmp.mp</span></samp>, which inputs
+ <samp><span class="file">3DLDFput.mp</span></samp>.
+ 
+      <pre class="example">          mpost 3DLDFput
+ </pre>
+      <p class="noindent">The result is an Encapsulated PostScript file
+ <samp><span class="file">3DLDFput.</span></samp>&lt;<i>integer</i>&gt; for each figure in your drawing.
+ 
+      <li>The file <samp><span class="file">3DLDFtex.tex</span></samp> should contain code for including the
+ <samp><span class="file">3DLDFput.</span></samp>&lt;<i>integer</i>&gt; files.  This is an example taken from
+ the <samp><span class="file">3DLDFtex.tex</span></samp> included in the distribution. 
+ You may change it to suit your purposes.
+ 
+      <pre class="example">          \vbox to \vsize{\vskip 2cm
+           \line{\hskip 2cm Figure 1.\hss}%
+           \vfil
+           \line{\hskip 2cm\epsffile{3DLDFmp.1}\hss}%
+           \vss}
+ </pre>
+      <li>Run TeX on <samp><span class="file">3DLDFtex.tex</span></samp> to produce the DVI file,
+ <samp><span class="file">3DLDFtex.dvi</span></samp>.
+ 
+      <pre class="example">          tex 3DLDFtex
+ </pre>
+      <li>Run <samp><span class="command">dvips</span></samp> on the DVI file to produce the PostScript file,
+ <samp><span class="file">3DLDFtex.ps</span></samp>.
+ 
+      <pre class="example">          dvips -o 3DLDFtex.ps 3DLDFtex
+ </pre>
+      <li><samp><span class="file">3DLDFtex.ps</span></samp> can be viewed using Ghostview, it can be printed using
+ <samp><span class="command">lpr</span></samp> (on a Unix-like system),  you can convert it to PDF with
+ <code>ps2pdf</code>, or to some other format using the appropriate program.
+         </ol>
+ 
+    <p>I sincerely hope that it worked.  If it didn't, ask your local computer
+ wizard for help.
+ 
+    <p>On the computer I'm using, I found that <code>special</code> arguments for
+ setting <code>landscape</code> and <code>papersize</code> in TeX files for
+ DIN A3 landscape didn't work.  Ghostview cut off the right sides of the
+ drawings.  Nor did it work to call
+ <samp><span class="command">dvips -t landscape -t a3</span></samp>. 
+ This caused an error message which said that
+ <code>landscape</code> would be ignored.  When I called <samp><span class="command">dvips</span></samp>
+ with the <samp><span class="option">-t landscape</span></samp> option alone, it worked, and
+ Ghostview showed the entire drawing.
+ 
+    <p>Another problem was Adobe Acrobat.  It would display the entire DIN A3
+ page, but not always in landscape format.  I was unable to find a way of
+ rotating the pages in Acrobat.  I finally found out, that if I included
+ even a single letter of text in a label, Acrobat would display the
+ document correctly.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Converting-EPS-Files">Converting EPS Files</a>
+ <li><a accesskey="2" href="#Command-Line-Arguments">Command Line Arguments</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Converting-EPS-Files"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Command-Line-Arguments">Command Line Arguments</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Running-3DLDF">Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Running-3DLDF">Running 3DLDF</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">11.2.1 Converting EPS Files</h4>
+ 
+ <p><a name="index-ImageMagick-104"></a><a name="index-ImageMagick-convert-105"></a><a name="index-convert-_0028ImageMagick_0029-106"></a><a name="index-PNG-_0028Portable-Network-Graphics_0029-107"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-108"></a><a name="index-PS-_0028PostScript_0029-109"></a><a name="index-PostScript-_0028PS_0029-110"></a><a name="index-structured-PostScript-111"></a><a name="index-PostScript_002c-structured-112"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-113"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-114"></a><a href="http://www.imagemagick.org">ImageMagick</a> is a
+ &ldquo;collection of tools and libraries&rdquo; for image manipulation. 
+ It provides a `<tt>convert</tt>' utility which can convert images from one
+ format to another.  It can convert structured PostScript (PS) to
+ to <a href="http://www.libpng.org/pub/png/index.html">Portable Network Graphics (PNG)</a>, but <em>not</em>
+ EPS (Encapsulated PostScript) to PNG.  Nor can it convert EPS to
+ structured PostScript.
+ 
+    <p>It is possible to have MetaPost generate structured PostScript directly
+ by including the command &lsquo;<samp><span class="samp">prologues:=1;</span></samp>&rsquo; at the beginning of the
+ MetaPost input. 
+ However, this &ldquo;generally doesn't work when you use TeX
+ fonts.&rdquo;<a rel="footnote" href="#fn-25" name="fnd-25"><sup>25</sup></a>
+ This is a significant problem if your labels contain math mode
+ material, and you haven't already taken steps to ensure that appropriate
+ fonts will be used in the PS output.
+ 
+    <p>In the following, I describe the <em>only way</em> I've found to convert
+ an EPS image to PNG format while still using TeX fonts.  There may be
+ other and better ways of doing this, but I haven't found them.
+ 
+      <ol type=1 start=1>
+ <li>Assume the EPS image is in the file <samp><span class="file">3DLDFmp.1</span></samp>
+ Include the EPS image in a TeX file
+ which looks like this:
+ 
+      <pre class="example">          \advance\voffset by -1in
+           \advance\hoffset by -1in
+           \nopagenumbers
+           \input epsf
+           \epsfverbosetrue
+           \def\epsfsize#1#2{#1}
+           \setbox0=\vbox{\epsffile{3DLDFmp.1}}
+           \vsize=\ht0
+           \hsize=\wd0
+           \special{papersize=\the\wd0,\the\ht0}
+           \box0
+           \bye
+ </pre>
+      <p><b>Do not</b> name this file <samp><span class="file">3DLDFmp.1.tex</span></samp>! 
+ While this worked fine for me on a DECalpha Personal Workstation
+ running under Tru64 Unix 5.1, with TeX, Version 3.1415
+ (C version 6.1), and <b>dvipsk</b> 5.58f,
+ it failed on a PC Pentium II XEON under Linux 2.4,
+ with TeX, Version 3.14159 (Web2C 7.4.5), and
+ <b>dvips(k)</b> 5.92b, kpathsea version 3.4.5,
+ with the following error message:
+      <pre class="display">          &ldquo;No BoundingBox comment found in file examples.1; using defaults&rdquo;
+ </pre>
+      <p class="noindent">The resulting PS image had the wrong size and the
+ the graphic was positioned improperly.
+ 
+      <p>Apparently, it confuses the EPSF macros when the name of an
+ included image is the same as &lsquo;<samp><span class="samp">\jobname</span></samp>&rsquo;. 
+ So, for this example, let's call it <samp><span class="file">3DLDFmp.1_.tex</span></samp>.
+ 
+      <p>You don't really need to call the macro &lsquo;<samp><span class="samp">\epsfverbosetrue</span></samp>&rsquo;.  If you
+ do, it will print the measurements of the bounding box and other information
+ to standard output.<a rel="footnote" href="#fn-26" name="fnd-26"><sup>26</sup></a>
+ 
+      <li>Run &lsquo;<samp><span class="samp">tex 3DLDFmp.1_.tex</span></samp>&rsquo;.
+ 
+      <li>Run &lsquo;<samp><span class="samp">dvips -o 3DLDF.1.ps 3DLDFmp.1_.dvi</span></samp>&rsquo;.
+ 
+      <li>Run &lsquo;<samp><span class="samp">convert 3DLDF.1.ps 3DLDFmp.1.png</span></samp>&rsquo;.
+         </ol>
+ 
+    <p><a name="index-ImageMagick-115"></a><a name="index-ImageMagick-display-116"></a><a name="index-display-_0028ImageMagick_0029-117"></a><a href="http://www.imagemagick.org">ImageMagick</a>
+ supplies a `<samp><span class="command">display</span></samp>' utility, which can be used to display the
+ PNG image:
+ 
+ <pre class="example">     display 3DLDFmp.1.png
+ </pre>
+    <p>It can be included in an HTML document as follows:
+ 
+ <pre class="example">     &lt;img src="3DLDFmp.1.png"
+               alt="[Fig. 1]."
+ </pre>
+    <p><a name="index-CD_002dR-_0028Compact-Disk_002c-Recordable_0029-118"></a><a name="index-Compact-Disk_002c-Recordable-_0028CD_002dR_0029-119"></a><b>Please note!</b>  The PNG files for this manual are now called
+ filename <samp><span class="file">3DLDF1.png</span></samp>,  <samp><span class="file">3DLDF2.png</span></samp>, <small class="dots">...</small>,
+ <samp><span class="file">3DLDF199.png</span></samp>,
+ because I wasn't able to write files
+ with names like <samp><span class="file">3DLDFmp.&lt;</span><i>number</i><span class="file">&gt;.png</span></samp> to a CD-R (Compact
+ Disk, Recordable), when `<i>number</i>' had more than one digit.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Converting-EPS-Files-ELISP"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Converting-EPS-Files">Converting EPS Files</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Converting-EPS-Files">Converting EPS Files</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">11.2.1.1 Emacs-Lisp Functions</h5>
+ 
+ <p><a name="index-PNG-_0028Portable-Network-Graphics_0029-120"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-121"></a><a name="index-PS-_0028PostScript_0029-122"></a><a name="index-PostScript-_0028PS_0029-123"></a><a name="index-structured-PostScript-124"></a><a name="index-PostScript_002c-structured-125"></a><a name="index-EPS-_0028Encapsulated-PostScript_0029-126"></a><a name="index-Encapsulated-PostScript-_0028EPS_0029-127"></a><a name="index-Emacs_002dLisp-128"></a>The file <samp><span class="file">3DLDF-1.1.5.1/CWEB/cnepspng.el</span></samp> contains
+ definitions of two Emacs-Lisp functions that can be used to
+ convert Encapsulated PostScript (EPS) files to structured PostScript
+ (PS) and Portable Network Graphics (PNG) files.
+ 
+ <div class="defun">
+ &mdash; Emacs-Lisp function: <b>convert-eps</b><var> filename do-not-delete-files<a name="index-convert_002deps-129"></a></var><br>
+ <blockquote><p>Converts an EPS image file to the PS and PNG formats.
+ 
+         <p>If called interactively, <samp><span class="command">convert-eps</span></samp> prompts for the
+ filename, including the extension, of an
+ EPS image file.  It follows the procedure described above in
+ <a href="#Converting-EPS-Files">Converting EPS Files</a>, to create
+ <samp><var>filename</var><span class="file">.ps</span></samp> and <samp><var>filename</var><span class="file">.png</span></samp>.
+ 
+         <p>If <var>do-not-delete-files</var> is <code>nil</code>,
+ the <samp><span class="file">.tex</span></samp>, <samp><span class="file">.dvi</span></samp>, and <samp><span class="file">.log</span></samp> files will be deleted. 
+ This is the case when <samp><span class="command">convert-eps</span></samp> is called interactively
+ with no prefix argument. 
+ If <samp><span class="command">convert-eps</span></samp> is called interactively with a prefix
+ argument, or non-interactively with a non-<code>nil</code>
+ <var>do-not-delete-files</var> argument, these files will not be deleted. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Emacs-Lisp function: <b>convert-eps-loop</b><var> arg start end<a name="index-convert_002deps_002dloop-130"></a></var><br>
+ <blockquote><p>Converts a set of EPS image files to the PS and PNG formats. 
+ The files
+ must all have the same filename, and the extensions must form a range of
+ positive integers.  For example, <samp><span class="command">convert-eps-loop</span></samp> can be
+ used to convert the files <samp><span class="file">3DLDFmp.1</span></samp>, <samp><span class="file">3DLDFmp.2</span></samp>, and
+ <samp><span class="file">3DLDFmp.3</span></samp> to <samp><span class="file">3DLDFmp.1.ps</span></samp>, <samp><span class="file">3DLDFmp.2.ps</span></samp>, and
+ <samp><span class="file">3DLDFmp.3.ps</span></samp> on the one hand, and
+ <samp><span class="file">3DLDFmp.1.png</span></samp>, <samp><span class="file">3DLDFmp.2.png</span></samp>,
+ <samp><span class="file">3DLDFmp.3.png</span></samp> on the other.
+ 
+         <p>If <samp><span class="command">convert-eps-loop</span></samp> is called interactively,
+ it prompts for <var>filename</var> <em>with no extension</em>
+ and the starting and ending numbers of the range.
+ 
+         <p>For all i \in \INT and <var>start</var> \le i \le <var>end</var>,
+ <samp><span class="command">convert-eps-loop</span></samp> checks whether a file named
+ <samp><var>filename.i</var></samp> exists.  If it does,
+ it calls <samp><span class="command">convert-eps</span></samp>, passing
+ <samp><var>filename.i</var></samp> as the latter's <var>filename</var> argument.
+ 
+         <p><var>do-not-delete-files</var> is also passed to <samp><span class="command">convert-eps</span></samp>.  If
+ it's <code>nil</code>,
+ the <samp><span class="file">.tex</span></samp>, <samp><span class="file">.dvi</span></samp>, and <samp><span class="file">.log</span></samp> files will be deleted. 
+ This is the case when <samp><span class="command">convert-eps-loop</span></samp> is called interactively
+ with no prefix argument. 
+ If <samp><span class="command">convert-eps-loop</span></samp> is called interactively with a prefix
+ argument, or non-interactively with a non-<code>nil</code>
+ <var>do-not-delete-files</var> argument, these files will not be deleted. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Command-Line-Arguments"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Converting-EPS-Files">Converting EPS Files</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Running-3DLDF">Running 3DLDF</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">11.2.2 Command Line Arguments</h4>
+ 
+ <p><samp><span class="command">3dldf</span></samp> can be called with the following
+ <dfn>command line arguments</dfn>.
+ 
+      <dl>
+ <dt><code>--help</code><dd>Prints information about the valid command line options to standard
+ output and exits with return value 0.
+ 
+      <br><dt><code>--silent</code><dd>Suppresses some output to standard output
+ and standard error when <samp><span class="command">3dldf</span></samp> is run
+ 
+      <br><dt><code>--verbose</code><dd>Causes status information to be printed to standard output
+ when <samp><span class="command">3dldf</span></samp> is run.
+ 
+      <br><dt><code>--version</code><dd>Prints the version number of 3DLDF
+ to standard output and exits with return value 0. 
+ </dl>
+ 
+    <p>Currently, <samp><span class="command">3dldf</span></samp> can only handle long options.  &lsquo;<samp><span class="samp">-</span></samp>&rsquo;
+ cannot be substituted for &lsquo;<samp><span class="samp">--</span></samp>&rsquo;.  However, the names of the options
+ themselves can be abbreviated, as long as the abbreviation is
+ unambigous.  For example, &lsquo;<samp><span class="samp">3dldf --h</span></samp>&rsquo; and &lsquo;<samp><span class="samp">3dldf --verb</span></samp>&rsquo; are
+ valid, but &lsquo;<samp><span class="samp">3dldf --ver</span></samp>&rsquo; is not.
+ 
+ <!-- !! TO DO: Put this in large, boldface type like a chapter heading, -->
+ <!-- for the printed output.  Having it be a node caused problems with the -->
+ <!-- Info output.  Using `@iftex' doesn't work, because the nodes are used -->
+ <!-- for making the menus. -->
+ <!-- It has to be here, because of the restrictions on -->
+ <!-- multiple files. -->
+ <!-- Class and Function Reference -->
+ <!-- @c Unless otherwise stated, all of the functions described in the following -->
+ <!-- @c chapters are @dfn{member functions} of the -->
+ <!-- @c the @code{class} currently under discussion. -->
+ <!-- typeglb.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Typedefs-and-Utility-Structures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Global-Constants-and-Variables">Global Constants and Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Installing-and-Running-3DLDF">Installing and Running 3DLDF</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">12 Typedefs and Utility Structures</h2>
+ 
+ <p>3DLDF defines a number of data types for various reasons, e.g., for the
+ sake of convenience, for use in conditional compilation, or as return
+ values of functions.  Some of these data types can be defined using
+ <code>typedef</code>, while others are defined as <code>structs</code>.
+ 
+    <p>The typedefs and utility structures described in this chapter are
+ found in <samp><span class="file">pspglb.web</span></samp>.  Others, that contain objects of types
+ defined in 3DLDF, are described in subsequent chapters.
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real</b><var><a name="index-real-131"></a></var><br>
+ <blockquote><p>Synonymous either with <code>float</code> or <code>double</code>, depending on the
+ values of the preprocessor variables <code>LDF_REAL_FLOAT</code> and
+ <code>LDF_REAL_DOUBLE</code>.  The meaning of <code>real</code> is determined by
+ means of conditional compilation.  If <code>real</code> is <code>float</code>, 3DLDF
+ will require less memory than if <code>real</code> is <code>double</code>, but its
+ calculations will be less precise.  <code>real</code> is &ldquo;typedeffed&rdquo; to
+ <code>float</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real_pair</b><var> first second<a name="index-real_005fpair-132"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;real, real&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>real_triple</b><var> first second third<a name="index-real_005ftriple-133"></a></var><br>
+ <blockquote><p>All three data elements of <code>real_triple</code> are <code>reals</code>. 
+ It also has two constructors, described below.  There are no other
+ member functions. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>real_triple</b> (<var>void</var>)<var><a name="index-real_005ftriple-134"></a></var><br>
+ &mdash; Constructor: void <b>real_triple</b> (<var>real a, real b, real c</var>)<var><a name="index-real_005ftriple-135"></a></var><br>
+ <blockquote><p>The constructor taking no arguments sets <code>first</code>, <code>second</code>,
+ and <code>third</code> to 0.  The constructor taking three <code>real</code>
+ arguments sets <code>first</code> to <var>a</var>, <code>second</code> to <var>b</var>, and
+ <code>third</code> to <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>Matrix</b><var><a name="index-Matrix-136"></a></var><br>
+ <blockquote><p>A <code>Matrix</code> is a 4 X 4
+  array of <code>real</code>, e.g.,
+ <code>Matrix M;</code> == <code>real M[4][4]</code>. 
+ It is used in <code>class Transform</code> for storing transformation
+ matrices.  See <a href="#Transforms">Transforms</a>, and See <a href="#Transform-Reference">Transform Reference</a>, for more
+ information. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>real_short</b><var> first second<a name="index-real_005fshort-137"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;real, signed short&gt;</code>. 
+ It is the return type of <code>Plane::get_distance()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_pair</b><var> first second<a name="index-bool_005fpair-138"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;bool, bool&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_real</b><var> first second<a name="index-bool_005freal-139"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;bool, real&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <!-- glbcnvar.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Global-Constants-and-Variables"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">13 Global Constants and Variables</h2>
+ 
+ <p>The global constants and variables described in this chapter are
+ found in <samp><span class="file">pspglb.web</span></samp>.  Others, of types
+ defined in 3DLDF, are described in subsequent chapters.
+ 
+ <div class="defun">
+ &mdash; Constants: bool <b>ldf_real_float</b><var><a name="index-ldf_005freal_005ffloat-140"></a></var><br>
+ &mdash; : bool <b>ldf_real_double</b><var><a name="index-ldf_005freal_005fdouble-141"></a></var><br>
+ <blockquote><p>Set to 0 or 1 to match the values of the preprocessor macros
+ <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.  The latter are used
+ for conditional compilation and determine whether <code>real</code> is
+ &ldquo;typedeffed&rdquo; to <code>float</code> or <code>double</code>, i.e., whether
+ <code>real</code> is made to be a synonym of <code>float</code> or <code>double</code>
+ using <code>typedef</code>.
+ 
+         <p><code>ldf_real_float</code> and <code>ldf_real_double</code> can be used to control
+ conditional expressions in non-conditionally compiled code. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>PI</b><var><a name="index-PI-142"></a></var><br>
+ <blockquote><p>The value of <code>PI</code>
+ is calculated as
+ 4.0 * arctan(1.0). 
+ I believe that a preprocessor macro &ldquo;<code>PI</code>&rdquo; was
+ available when I compiled 3DLDF using the DEC C++
+  compiler, and that
+ it wasn't, when I used GNU CC under Linux, but I'm no longer sure. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: valarray &lt;real&gt; <b>null_coordinates</b><var><a name="index-null_005fcoordinates-143"></a></var><br>
+ <blockquote><p>Contains four elements, all 0.  Used for resetting the sets of
+ coordinates belonging to <code>Points</code>, but only when the DEC C++
+ 
+         <p>compiler is used.  This doesn't work when GCC is used. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>INVALID_REAL</b><var><a name="index-INVALID_005fREAL-144"></a></var><br>
+ <blockquote><p>Actually, <code>INVALID_REAL</code> is the largest possible <code>real</code> value
+ (i.e., <code>float</code> or <code>double</code>) on a given machine. 
+ So, from the point of view of the compiler, it's not invalid at all. 
+ However, 3DLDF uses it to indicate failure of some kind.  For example,
+ the return value of a function returning <code>real</code> can be compared
+ with <code>INVALID_REAL</code> to check whether the function succeeded or
+ failed.
+ 
+         <p>An alternative approach would be to use the exception handling
+ facilities of C++
+ .  I do use these, but only in a couple of places,
+ so far. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real_pair <b>INVALID_REAL_PAIR</b><var><a name="index-INVALID_005fREAL_005fPAIR-145"></a></var><br>
+ <blockquote><p><code>first</code> and <code>second</code> are both <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: real <b>INVALID_REAL_SHORT</b><var><a name="index-INVALID_005fREAL_005fSHORT-146"></a></var><br>
+ <blockquote><p><code>first</code> is <code>INVALID_REAL</code> and <code>second</code> is 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>MAX_REAL</b><var><a name="index-MAX_005fREAL-147"></a></var><br>
+ <blockquote><p><a name="index-system-dependencies-148"></a>The largest <code>real</code> value permitted in the the elements of
+ <code>Transforms</code> and the coordinates of
+ <code>Points</code>.  It is the second largest <code>real</code> value (i.e.,
+ <code>float</code> or <code>double</code>) on a given machine (<code>INVALID_REAL</code>
+ is the largest).
+ 
+         <p><code>MAX_REAL</code> is a variable, but it should be used like a constant. 
+ In other words, users should never reset its value.  It can't be
+ declared <code>const</code> because its value must be calculated using
+ function calls, which can't be done before the entry point of the
+ program, i.e., <code>main()</code>.  Therefore, the value of <code>MAX_REAL</code>
+ is calculated at the beginning of <code>main()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>MAX_REAL_SQRT</b><var><a name="index-MAX_005fREAL_005fSQRT-149"></a></var><br>
+ <blockquote><p>The square root of <code>MAX_REAL</code>.
+ 
+         <p><code>MAX_REAL_SQRT</code> is a variable, but it should be used like a
+ constant. In other words, users should never reset its value.  It can't
+ be declared <code>const</code> because its value is calculated using the
+ <code>sqrt()</code> function,
+ which can't be done before the entry point of the
+ program, i.e., <code>main()</code>.  Therefore, the value of
+ <code>MAX_REAL_SQRT</code> is set after <code>MAX_REAL</code> is calculated, at the
+ beginning of <code>main()</code>.
+ 
+         <p><code>MAX_REAL_SQRT</code> is used in <code>Point::magnitude()</code>
+ (see <a href="#Vector-Operations">Vector Operations</a>).  The magnitude of a <code>Point</code> is found
+ by using the formula
+ \sqrtx^2 + y^2 + z^2. 
+ x, y, and z are all tested against
+ <code>MAX_REAL_SQRT</code> to ensure that
+ x^2, y^2, and z^2
+ will all be
+ less than or equal to <code>MAX_REAL</code> before trying to calculate them.
+ 
+      <!-- !! TO DO. -->
+         <p>Metafont implements an operation called <dfn>Pythagorean addition</dfn>,
+ notated as &ldquo;<code>++</code>&rdquo;which
+ can be used to calculate distances without first squaring and then
+ taking square roots:<!-- !! GET REF., Metafont the program. -->
+ <a rel="footnote" href="#fn-27" name="fnd-27"><sup>27</sup></a>
+ a++b == \sqrt(a^2 + b^2)
+ and
+ a++b++c == \sqrt(a^2 + b^2 + c^2). 
+ This makes it possible to calculate distances for greater values of
+ a, b, and c, that would otherwise cause floating point errors. 
+ Metafont also implements the inverse operation
+ <dfn>Pythagorean subtraction</dfn>, notated as &ldquo;<code>+-+</code>&rdquo;:
+ <!-- !! TO DO:   There's an ugly space before ``a+-+b'' in the TeX -->
+ <!-- output.  It probably has to do with finding the best line breaks. -->
+ <!-- There's not much leeway, because of the shortness of the paragraph. -->
+ <!-- That's my interpretation, anyway.  LDF 2003.12.08. -->
+ <!-- It might be worthwhile trying to find out how Knuth did it for _The -->
+ <!-- METAFONTbook_.  LDF 2003.12.08. -->
+ a+-+b == \sqrt(a^2 - b^2). 
+ Unfortunately, 3DLDF implements neither Pythagorean addition
+ nor subtraction as yet, but it's on my
+ <a name="index-TO-DO-150"></a>list of &ldquo;things to do&rdquo;. 
+ </p></blockquote></div>
+ 
+ <!-- creatnew.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Dynamic-Allocation-of-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#System-Information">System Information</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Global-Constants-and-Variables">Global Constants and Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">14 Dynamic Allocation of Shapes</h2>
+ 
+ <div class="defun">
+ &mdash; Template function: <code>template &lt;class C&gt; C*</code> <b>create_new</b> (<var>const C* arg</var>)<var><a name="index-create_005fnew-151"></a></var><br>
+ &mdash; Template function: <code>template &lt;class C&gt; C*</code> <b>create_new</b> (<var>const C&amp; arg</var>)<var><a name="index-create_005fnew-152"></a></var><br>
+ <blockquote><p>These functions dynamically allocate an object derived from
+ <code>Shape</code> on the free store,
+ returning a pointer to the type of the <code>Shape</code> and setting
+ <code>on_free_store</code> to <code>true</code>.
+ 
+         <p>If a non-zero pointer or a reference is passed to <code>create_new()</code>,
+ the new object will be a copy of <var>arg</var>.
+ 
+         <p>It is not possible to instantiate more than one specialization of
+ <code>create_new()</code> that takes no argument, because calls to these
+ functions would be ambiguous.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to <code>create_new()</code>
+ as its argument.
+ 
+         <p><code>create_new</code> is called like this:
+ 
+      <pre class="example">          Point* p = create_new&lt;Point&gt;(0);
+           p-&gt;show("*p:");
+           -| *p: (0, 0, 0)
+           
+           Color c(.3, .5, .25);
+           Color* d = create_new&lt;Color&gt;(c);
+           d-&gt;show("*d:");
+           -|
+           *d:
+           name ==
+           use_name == 0
+           red_part == 0.3
+           green_part == 0.5
+           blue_part == 0.25
+           
+           
+           Point a0(3, 2.5, 6);
+           Point a1(10, 11, 14);
+           Path q(a0, a1);
+           Path* r = create_new&lt;Path&gt;(&amp;q);
+           r-&gt;show("*r:");
+           -|
+           *r:
+           points.size() == 2
+           connectors.size() == 1
+           (3, 2.5, 6) -- (10, 11, 14);
+ </pre>
+         <p>Specializations of this template function are currently declared for
+ <code>Color</code>, <code>Point</code>, <code>Path</code>, <code>Reg_Polygon</code>,
+ <code>Rectangle</code>, <code>Ellipse</code>, <code>Circle</code>, <code>Solid</code>, and
+ <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+ <!-- system.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="System-Information"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Color-Reference">Color Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">15 System Information</h2>
+ 
+ <p>The functions described in this chapter are all declared in the
+ <code>namespace System</code>.  They are for finding out information
+ about the system on which 3DLDF is being run.  They are declared and
+ defined in <samp><span class="file">pspglb.web</span></samp>, except for the template function
+ <code>get_second_largest()</code>, which is declared and defined in
+ <samp><span class="file">gsltmplt.web</span></samp>.
+ 
+    <p>There are two reasons for this.  The first is that template definitions
+ must be available
+ in the compilation units where specializations are instantiated. 
+ I therefore write the template definition of <code>get_second_largest()</code>
+ to <samp><span class="file">gsltmplt.h</span></samp>, so it can be included by the CWEB files that need
+ it, currently <samp><span class="file">main.web</span></samp> only.  If I
+ wrote it to <samp><span class="file">pspglb.h</span></samp>, it would be included by all of the CWEB
+ files except for <samp><span class="file">loader.web</span></samp>, causing unnecessarily bloated object
+ code.
+ 
+    <p>The other reason is because of the way way 3DLDF is built using Automake
+ and <tt>make</tt>.  I originally tried to define <code>get_second_largest()</code>
+ in <samp><span class="file">pspglb.web</span></samp> and wrote the definition to <samp><span class="file">gsltmplt.cc</span></samp>,
+ which is no problem with CWEB.  However, I was unable to express the
+ dependencies among the CWEB, C++
+ , and object files in such a way that
+ 3DLDF was built properly.
+ 
+    <p>Therefore all template functions will be put into files either by
+ themselves, or in small groups.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Endianness">Endianness</a>
+ <li><a accesskey="2" href="#Register-Width">Register Width</a>
+ <li><a accesskey="3" href="#Get-Second-Largest-Real">Get Second Largest Real</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Endianness"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Register-Width">Register Width</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#System-Information">System Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#System-Information">System Information</a>
+ 
+ </div>
+ 
+ <h3 class="section">15.1 Endianness</h3>
+ 
+ <div class="defun">
+ &mdash; Function: signed short <b>get_endianness</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-get_005fendianness-153"></a></var><br>
+ <blockquote><p>Returns the following values:
+ 
+           <dl>
+ <dt>0<dd>if the processor is little-endian.
+ 
+           <br><dt>1<dd>if the processor is big-endian.
+ 
+           <br><dt>-1<dd>if the endianness cannot be determined.
+ 
+         </dl>
+ 
+         <p>It is called by <code>is_little_endian()</code> and
+ <code>is_big_endian()</code>.
+ 
+         <p>If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output.
+ 
+         <p>This function has been adapted from
+ Harbison, Samuel&nbsp;<!-- /@w -->P., and Guy&nbsp;<!-- /@w -->L. Steele Jr. 
+ <cite>C, A Reference Manual</cite>, pp.&nbsp;<!-- /@w -->163&ndash;164. 
+ This book has the clearest explanation of endianness that I've found so
+ far.
+ 
+         <p>This is the C++
+  code:
+ 
+      <pre class="example">          signed short
+           System::get_endianness(const bool verbose)
+           {
+             union {
+               long Long;
+               char Char[sizeof(long)];
+             } u;
+             u.Long = 1;
+             if (u.Char[0] == 1)
+               {
+                 if (verbose)
+                   cout &lt;&lt; "Processor is little-endian."
+                        &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return 0;
+               }
+             else if (u.Char[sizeof(long) - 1] == 1)
+               {
+                 if (verbose)
+                   cout &lt;&lt; "Processor is big-endian."
+                        &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return 1;
+               }
+             else
+               {
+                 cerr &lt;&lt; "ERROR! In System::get_endianness():\n"
+                      &lt;&lt; "Can't determine endianness. Returning -1"
+                      &lt;&lt; endl &lt;&lt; endl &lt;&lt; flush;
+                 return -1;
+               }
+           }
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_big_endian</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-is_005fbig_005fendian-154"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the processor is big-endian, otherwise <code>false</code>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_little_endian</b> ([<var>const bool verbose = </var><code>false</code>])<var><a name="index-is_005flittle_005fendian-155"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the processor is little-endian, otherwise <code>false</code>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Register-Width"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Get-Second-Largest-Real">Get Second Largest Real</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Endianness">Endianness</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#System-Information">System Information</a>
+ 
+ </div>
+ 
+ <h3 class="section">15.2 Register Width</h3>
+ 
+ <div class="defun">
+ &mdash; Function: unsigned short <b>get_register_width</b> (<var>void</var>)<var><a name="index-get_005fregister_005fwidth-156"></a></var><br>
+ <blockquote><p>Returns the register width of the CPU of the system on which 3DLDF is
+ being run.  This will normally be either 32 or 64 bits.
+ 
+         <p>This is the C++
+  code:
+ 
+      <pre class="example">          return (sizeof(void*) * CHAR_BIT);
+ </pre>
+         <p>This assumes that an address will be the same size as the processor's
+ registers, and that <code>CHAR_BIT</code> will be the number of bits in a
+ byte.  These are reasonable assumptions that apply to all architectures
+ I know about.
+ 
+         <p>This function is called by <code>is_32_bit()</code> and <code>is_64_bit()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_32_bit</b> (<var>void</var>)<var><a name="index-is_005f32_005fbit-157"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the CPU of the system on which 3DLDF is being run
+ has a register width of 32 bits, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_64_bit</b> (<var>void</var>)<var><a name="index-is_005f64_005fbit-158"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the CPU of the system on which 3DLDF is being run
+ has a register width of 64 bits, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Get-Second-Largest-Real"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Register-Width">Register Width</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#System-Information">System Information</a>
+ 
+ </div>
+ 
+ <h3 class="section">15.3 Get Second Largest Real</h3>
+ 
+ <div class="defun">
+ &mdash; Template function: template &lt;class Real&gt; Real <b>get_second_largest</b> (<var>Real MAX_VAL, </var>[<var>bool verbose = </var><code>false</code>])<var><a name="index-get_005fsecond_005flargest-159"></a></var><br>
+ &mdash; Template specialization: float <b>get_second_largest</b> (<var>float, bool</var>)<var><a name="index-get_005fsecond_005flargest-160"></a></var><br>
+ &mdash; Template specialization: double <b>get_second_largest</b> (<var>double, bool</var>)<var><a name="index-get_005fsecond_005flargest-161"></a></var><br>
+ <blockquote><p><code>get_second_largest</code> returns the second largest floating point
+ number of the type specified the template paramater <var>Real</var>. 
+ If <var>verbose</var> is <code>true</code>, messages are printed to standard
+ output.
+ 
+         <p>This function is used for setting the value of <code>MAX_REAL</code>. 
+ See <a href="#Global-Constants-and-Variables">Global Constants and Variables</a>.
+ 
+         <p><code>get_second_largest</code> depends on there
+ being an unsigned integer type with the same length as <var>Real</var>. 
+ This should always be the case for <code>float</code> and <code>double</code>, but
+ may not be <code>long double</code>.
+ 
+         <p><var>MAX_VAL</var> should be the largest number of type <var>Real</var> on a given
+ architecture.  The GNU C++
+  compiler GCC 3.3 does not currently supply
+ the <code>numeric_limits</code> template, so it is necessary to pass
+ one of the macros <code>FLT_MAX</code> or <code>DBL_MAX</code> explicitly, depending
+ on which specialization you use<a rel="footnote" href="#fn-28" name="fnd-28"><sup>28</sup></a>. 
+ When and if GCC supplies the <code>numeric_limits</code> template, I will
+ eliminate the <var>MAX_REAL</var> argument. 
+ </p></blockquote></div>
+ 
+ <!-- color.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Color-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Input-and-Output">Input and Output</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#System-Information">System Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">16 Color Reference</h2>
+ 
+ <p><a name="index-Color-162"></a>Class <code>Color</code> is defined in <samp><span class="file">colors.web</span></samp>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Color-Data-Members">Color Data Members</a>
+ <li><a accesskey="2" href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Color-Operators">Color Operators</a>
+ <li><a accesskey="4" href="#Modifying-Colors">Modifying Colors</a>
+ <li><a accesskey="5" href="#Showing-Colors">Showing Colors</a>
+ <li><a accesskey="6" href="#Querying-Colors">Querying Colors</a>
+ <li><a accesskey="7" href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>
+ <li><a accesskey="8" href="#Namespace-Colors">Namespace Colors</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Color-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Color-Reference">Color Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: string <b>name</b><var><a name="index-name-163"></a></var><br>
+ <blockquote><p>The name of the <code>Color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: bool <b>use_name</b><var><a name="index-use_005fname-164"></a></var><br>
+ <blockquote><p>If <code>true</code>, <code>name</code> is written to <code>out_stream</code> when the
+ <code>Color</code> is used for drawing or filling.  Otherwise, the
+ <a name="index-RGB-_0028red_002dgreen_002dblue_0029-165"></a>RGB (red-green-blue) values are written to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-166"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Color</code> has been created by
+ <code>create_new&lt;Color&gt;()</code>, which allocates memory for the
+ <code>Color</code> on the free store.  Otherwise <code>false</code>. 
+ <code>Colors</code> should only ever be dynamically allocated by using
+ <code>create_new&lt;Color&gt;()</code>. 
+ See <a href="#Color-Constructors-and-Setting-Functions">Color Reference;;Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: real <b>red_part</b><var><a name="index-red_005fpart-167"></a></var><br>
+ &mdash; Variable: real <b>green_part</b><var><a name="index-green_005fpart-168"></a></var><br>
+ &mdash; Variable: real <b>blue_part</b><var><a name="index-blue_005fpart-169"></a></var><br>
+ <blockquote><p>The RGB (red-green-blue) values of the <code>Color</code>. 
+ A <code>real</code> value r is valid for these variables if and
+ only if
+ 0 &lt;= r &lt;= 1. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Color-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Color-Operators">Color Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Color-Data-Members">Color Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Color</b> (<var>void</var>)<var><a name="index-Color-170"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> and initializes its <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code> to 0.  <code>use_name</code> and
+ <code>on_free_store</code> are set to <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Color</b> (<var>const Color&amp; c, </var>[<var>const string n = "", </var>[<var>const bool u = </var><code>true</code>]])<var><a name="index-Color-171"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> and makes it a copy of <var>c</var>.  If <var>n</var> is
+ not the empty string and <var>u</var> is <code>true</code>, <code>use_name</code> is set
+ to <code>true</code>.  Otherwise, its set to <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Color</b> (<var>const string n, const unsigned short r, const unsigned short g, const unsigned short b, </var>[<var>const bool u = </var><code>true</code>])<var><a name="index-Color-172"></a></var><br>
+ <blockquote><p>Creates a <code>Color</code> with name <var>n</var>.  Its <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code> are set to
+ r/255.0, g/255.0, and b/255.0,
+ respectively. 
+ <code>use_name</code> is set to <var>u</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const string n, const unsigned short r, const unsigned short g, const unsigned short b, </var>[<var>const bool u = </var><code>false</code>])<var><a name="index-set-173"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above, except that <var>u</var> is <code>false</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Color</b> (<var>const real r, const real g, const real b</var>)<var><a name="index-Color-174"></a></var><br>
+ <blockquote><p>Creates an unnamed <code>Color</code> using the <code>real</code> values <var>r</var>,
+ <var>g</var>, and <var>b</var> for its <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code>, respectively. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real r, const real g, const real b</var>)<var><a name="index-set-175"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Color* <b>create_new&lt;Color&gt;</b> (<var>const Color* c</var>)<var><a name="index-create_005fnew_003cColor_003e-176"></a></var><br>
+ &mdash; : Color* <b>create_new&lt;Color&gt;</b> (<var>const Color&amp; c</var>)<var><a name="index-create_005fnew_003cColor_003e-177"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Colors</code>. 
+ They create a <code>Color</code> on the free store and allocate memory for it using
+ <code>new(Color)</code>.  They return a pointer to the new <code>Color</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Color</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Color&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+      <!-- !! TO DO: -->
+         <p>This function is used in the drawing and filling functions for
+ <code>Path</code> and <code>Solid</code>.  <code>Point::drawdot()</code> should be changed
+ to use it too, but I haven't gotten around to doing this yet. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Color-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Colors">Modifying Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_003d-178"></a></var><br>
+ <blockquote><p>Sets <code>name</code> to the empty <code>string</code>, <code>use_name</code> to
+ <code>false</code>, and <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code> to <var>c</var>.<code>red_part</code>, <var>c</var>.<code>green_part</code>, and
+ <var>c</var>.<code>blue_part</code>, respectively. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_003d_003d-179"></a></var><br>
+ <blockquote><p>Equality operator.  Returns <code>true</code>, if the <code>red_parts</code>,
+ <code>green_parts</code>, and <code>blue_parts</code> of <code>*this</code> and <var>c</var>
+ are equal, otherwise <code>false</code>.  The <code>names</code> and
+ <code>use_names</code> are not compared. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Color&amp; c</var>)<var><a name="index-operator_0021_003d-180"></a></var><br>
+ <blockquote><p>Inequality operator.  Returns <code>false</code>, if the <code>red_parts</code>,
+ <code>green_parts</code>, and <code>blue_parts</code> of <code>*this</code> and <var>c</var>
+ are equal, otherwise <code>true</code>.  The  <code>names</code> and
+ <code>use_names</code> are not compared. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member function: ostream&amp; <b>operator&lt;&lt;</b> (<var>ostream&amp; o, const Color&amp; c</var>)<var><a name="index-operator_003c_003c-181"></a></var><br>
+ <blockquote><p>Output operator.  Writes the MetaPost code for the <code>Color</code> to
+ <code>out_stream</code> when a <code>Picture</code> is output.  This occurs when
+ the <code>Color</code> has been used as an argument to
+ drawing or filling functions.
+ 
+         <p>If <code>use_name</code> is <code>true</code>, <code>name</code> is written to
+ <code>out_stream</code>.  Otherwise,
+ &ldquo;(<code>red_part</code>, <code>green_part</code>, <code>blue_part</code>)&rdquo; is written to
+ <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Colors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Colors">Showing Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Color-Operators">Color Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.4 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_name</b> (<var>const string s</var>)<var><a name="index-set_005fname-182"></a></var><br>
+ <blockquote><p>Sets <code>name</code> to <var>s</var>.  <code>use_name</code> is not reset. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_use_name</b> (<var>const bool b</var>)<var><a name="index-set_005fuse_005fname-183"></a></var><br>
+ <blockquote><p>Sets <code>use_name</code> to <var>b</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>modify</b> (<var>const real r, </var>[<var>const real g = 0, </var>[<var>const real b = 0</var>]])<var><a name="index-modify-184"></a></var><br>
+ <blockquote><p>Adds <var>r</var>, <var>g</var>, and <var>b</var> to <code>red_part</code>,
+ <code>green_part</code>, and <code>blue_part</code>, respectively.  Following the
+ addition, if <code>red_part</code>, <code>green_part</code>, and/or <code>blue_part</code>
+ is greater than 1, it is reduced to 1.  If it is less than 0, it is
+ increased to 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_red_part</b> (<var>const real q</var>)<var><a name="index-set_005fred_005fpart-185"></a></var><br>
+ &mdash; Function: void <b>set_green_part</b> (<var>const real q</var>)<var><a name="index-set_005fgreen_005fpart-186"></a></var><br>
+ &mdash; Function: void <b>set_blue_part</b> (<var>const real q</var>)<var><a name="index-set_005fblue_005fpart-187"></a></var><br>
+ <blockquote><p>Let p stand for <code>red_part</code>,
+ <code>green_part</code>, or <code>blue_part</code>, depending upon which function is
+ used. 
+ If
+ 0 &lt;= q &lt;= 1,
+ p is set to q.  If
+ q &lt; 0, p is set to 0. 
+ If q &gt; 1, p is set to 1. 
+ </p></blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Showing-Colors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Colors">Querying Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Colors">Modifying Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.5 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-188"></a></var><br>
+ <blockquote><p>Prints information about the <code>Color</code> to standard output. 
+ If <var>text</var> is not the empty <code>string</code>, prints <var>text</var> on a
+ line of its own.  Otherwise, it prints &ldquo;Color:&rdquo;.  Then it prints
+ <code>name</code>, <code>use_name</code>, <code>red_part</code>, <code>green_part</code>, and
+ <code>blue_part</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Colors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Colors">Showing Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.6 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-189"></a></var><br>
+ <blockquote><p>Returns <code>on_free_store</code>.  This will only be true, if the
+ <code>Color</code> was created by <code>create_new&lt;Color&gt;()</code>. 
+ See <a href="#Color-Constructors-and-Setting-Functions">Color Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: real <b>get_red_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fred_005fpart-190"></a></var><br>
+ &mdash; Inline <code>const</code> function: real <b>get_green_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fgreen_005fpart-191"></a></var><br>
+ &mdash; Inline <code>const</code> function: real <b>get_blue_part</b> ([<var>bool decimal = </var><code>false</code>])<var><a name="index-get_005fblue_005fpart-192"></a></var><br>
+ <blockquote><p>These functions return the <code>red_part</code>, <code>green_part</code>, or
+ <code>blue_part</code> of the <code>Color</code>, respectively.  If <var>decimal</var> is
+ <code>false</code> (the default), the actual <code>real</code> value of the &ldquo;part&rdquo;
+ is returned.  Otherwise, the corresponding whole number
+ n such that
+ 0 &lt;= n &lt;= 255
+ is returned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>get_use_name</b> (<var>void</var>)<var><a name="index-get_005fuse_005fname-193"></a></var><br>
+ <blockquote><p>Returns <code>use_name</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: string <b>get_name</b> (<var>void</var>)<var><a name="index-get_005fname-194"></a></var><br>
+ <blockquote><p>Returns <code>name</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Defining-and-Initializing-Colors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Namespace-Colors">Namespace Colors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Colors">Querying Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.7 Defining and Initializing Colors</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>define_color_mp</b> ()<var><a name="index-define_005fcolor_005fmp-195"></a></var><br>
+ <blockquote><p>Writes MetaPost code to <code>out_stream</code>, in order to define objects of
+ type  <code>color</code> within MetaPost, and set their <code>redparts</code>,
+ <code>greenparts</code>, and <code>blueparts</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>initialize_colors</b> (<var>void</var>)<var><a name="index-initialize_005fcolors-196"></a></var><br>
+ <blockquote><p>Calls <code>define_color_mp()</code> (described above) for the
+ <code>Colors</code> that are defined in <code>namespace Colors</code>
+ (see <a href="#Namespace-Colors">Namespace Colors</a>). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Namespace-Colors"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Color-Reference">Color Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">16.8 Namespace Colors.</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Color <b>red</b><var><a name="index-red-197"></a></var><br>
+ &mdash; Constant: const Color <b>green</b><var><a name="index-green-198"></a></var><br>
+ &mdash; Constant: const Color <b>blue</b><var><a name="index-blue-199"></a></var><br>
+ &mdash; Constant: const Color <b>cyan</b><var><a name="index-cyan-200"></a></var><br>
+ &mdash; Constant: const Color <b>yellow</b><var><a name="index-yellow-201"></a></var><br>
+ &mdash; Constant: const Color <b>magenta</b><var><a name="index-magenta-202"></a></var><br>
+ &mdash; Constant: const Color <b>orange_red</b><var><a name="index-orange_005fred-203"></a></var><br>
+ &mdash; Constant: const Color <b>violet_red</b><var><a name="index-violet_005fred-204"></a></var><br>
+ &mdash; Constant: const Color <b>pink</b><var><a name="index-pink-205"></a></var><br>
+ &mdash; Constant: const Color <b>green_yellow</b><var><a name="index-green_005fyellow-206"></a></var><br>
+ &mdash; Constant: const Color <b>orange</b><var><a name="index-orange-207"></a></var><br>
+ &mdash; Constant: const Color <b>violet</b><var><a name="index-violet-208"></a></var><br>
+ &mdash; Constant: const Color <b>purple</b><var><a name="index-purple-209"></a></var><br>
+ &mdash; Constant: const Color <b>blue_violet</b><var><a name="index-blue_005fviolet-210"></a></var><br>
+ &mdash; Constant: const Color <b>yellow_green</b><var><a name="index-yellow_005fgreen-211"></a></var><br>
+ &mdash; Constant: const Color <b>black</b><var><a name="index-black-212"></a></var><br>
+ &mdash; Constant: const Color <b>white</b><var><a name="index-white-213"></a></var><br>
+ &mdash; Constant: const Color <b>gray</b><var><a name="index-gray-214"></a></var><br>
+ &mdash; Constant: const Color <b>light_gray</b><var><a name="index-light_005fgray-215"></a></var><br>
+ <blockquote><p>These constant <code>Colors</code> can be used in drawing and filling
+ commands. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: const Color <b>default_background</b><var><a name="index-default_005fbackground-216"></a></var><br>
+ <blockquote><p>The default background color.  Equal to <code>white</code> per default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>background_color</b><var><a name="index-background_005fcolor-217"></a></var><br>
+ <blockquote><p>Points to <code>default_background</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>default_color</b><var><a name="index-default_005fcolor-218"></a></var><br>
+ <blockquote><p>Points to <code>black</code> by default. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pointer: const Color* <b>help_color</b><var><a name="index-help_005fcolor-219"></a></var><br>
+ <blockquote><p>Points to <code>green</code> by default. 
+ </p></blockquote></div>
+ 
+    <p>The following vectors of pointers to <code>Color</code> can be used in the
+ drawing and filling functions for <code>Solid</code>
+ (see <a href="#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>).
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>default_color_vector</b><var><a name="index-default_005fcolor_005fvector-220"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>default_color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>help_color_vector</b><var><a name="index-help_005fcolor_005fvector-221"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>help_color</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Vector: const vector &lt;const Color*&gt; <b>background_color_vector</b><var><a name="index-background_005fcolor_005fvector-222"></a></var><br>
+ <blockquote><p>Contains one pointer, namely <code>background_color</code>. 
+ </p></blockquote></div>
+ 
+ <!-- io.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Input-and-Output"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Shape-Reference">Shape Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Color-Reference">Color Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">17 Input and Output</h2>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#I_002fO-Global-Variables">I/O Global Variables</a>
+ <li><a accesskey="2" href="#I_002fO-Functions">I/O Functions</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="I%2fO-Global-Variables"></a>
+ <a name="I_002fO-Global-Variables"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#I_002fO-Functions">I/O Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Input-and-Output">Input and Output</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Input-and-Output">Input and Output</a>
+ 
+ </div>
+ 
+ <h3 class="section">17.1 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: ifstream <b>in_stream</b><var><a name="index-in_005fstream-223"></a></var><br>
+ <blockquote><p>Intended for inputting files of input code.  However, 3DLDF does not
+ currently have a routine for reading input code. 
+ <code>in_stream</code> is currently attached to the file <samp><span class="file">ldfinput.ldf</span></samp>
+ by <code>initialize_io()</code> (see <a href="#I_002fO-Functions">I/O Functions</a>). 
+ <code>in_stream</code> is read in character-by-character in <code>main()</code>,
+ however this serves no useful purpose as yet. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: ofstream <b>out_stream</b><var><a name="index-out_005fstream-224"></a></var><br>
+ <blockquote><p>Used for writing the file of MetaPost code, which is 3DLDF's output. 
+ Currently attached to the file <samp><span class="file">subpersp.mp</span></samp> by
+ <code>initialize_io()</code> (see <a href="#I_002fO-Functions">I/O Functions</a>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Variable: ofstream <b>tex_stream</b><var><a name="index-tex_005fstream-225"></a></var><br>
+ <blockquote><p>TeX code can be written to a file through <code>tex_stream</code>, if
+ desired.  3DLDF makes no use of it itself. 
+ Currently attached to <samp><span class="file">subpersp.tex</span></samp> by
+ <code>initialize_io()</code> (see <a href="#I_002fO-Functions">I/O Functions</a>). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="I%2fO-Functions"></a>
+ <a name="I_002fO-Functions"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#I_002fO-Global-Variables">I/O Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Input-and-Output">Input and Output</a>
+ 
+ </div>
+ 
+ <h3 class="section">17.2 I/O Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>initialize_io</b> (<var>string in_stream_name, string out_stream_name, string tex_stream_name, char* program_name</var>)<var><a name="index-initialize_005fio-226"></a></var><br>
+ <blockquote><p>Opens files with names specified by the first three arguments, and
+ attaches them to the file streams <code>in_stream</code>, <code>out_stream</code>, and
+ <code>tex_stream</code>, respectively.  Comments are written at the beginning
+ of the files, containing their names, a datestamp, and the name of the
+ program used to generate them. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>write_footers</b> (<var>void</var>)<var><a name="index-write_005ffooters-227"></a></var><br>
+ <blockquote><p>Writes code at the end of the files attached to <code>in_stream</code>,
+ <code>out_stream</code>, and <code>tex_stream</code>, before the streams are
+ closed.  Currently, they write comments containing
+ <a name="index-local-variable-lists-228"></a>local variable lists
+ for use in
+ <a name="index-Emacs-229"></a>Emacs. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>beginfig</b> (<var>unsigned short i</var>)<var><a name="index-beginfig-230"></a></var><br>
+ <blockquote><p>Writes &ldquo;<code>beginfig(</code><var>i</var><code>)</code>&rdquo; to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>endfig</b> ([<var>unsigned short i = 0</var>])<var><a name="index-endfig-231"></a></var><br>
+ <blockquote><p>Writes &ldquo;<code>endfig()</code>&rdquo; to <code>out_stream</code>.  The argument <var>i</var>
+ is &ldquo;syntactic sugar&rdquo;;  it's ignored by <code>endfig()</code>,
+ but may help the user keep track of what figure is being ended. 
+ </p></blockquote></div>
+ 
+ <!-- shape.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Shape-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transform-Reference">Transform Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Input-and-Output">Input and Output</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">18 Shape Reference</h2>
+ 
+ <p><a name="index-Shape-232"></a>Class <code>Shape</code> is defined in <samp><span class="file">shapes.web</span></samp>.
+ 
+    <p><code>Shape</code> is an <dfn>abstract class</dfn>, which means that
+ all of its member functions are pure virtual functions, and
+ that it's only used as a base class, i.e., no objects of type
+ <code>Shape</code> may be declared.
+ 
+    <p>All of the &ldquo;drawable&rdquo; types in 3DLDF, <code>Point</code>,
+ <code>Path</code>, <code>Ellipse</code>, etc., are derived from <code>Shape</code>.
+ 
+    <p>Deriving all of the drawable types from <code>Shape</code> makes it possible
+ to handle objects of different types in the same way.  This is
+ especially important in the <code>Picture</code> functions, where objects of
+ various types (but all derived from <code>Shape</code>) are accessed through
+ pointers to <code>Shape</code>.  See <a href="#Picture-Reference">Picture Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Shape-Data-Members">Shape Data Members</a>
+ <li><a accesskey="2" href="#Shape-Operators">Shape Operators</a>
+ <li><a accesskey="3" href="#Copying-Shapes">Copying Shapes</a>
+ <li><a accesskey="4" href="#Modifying-Shapes">Modifying Shapes</a>
+ <li><a accesskey="5" href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>
+ <li><a accesskey="6" href="#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>
+ <li><a accesskey="7" href="#Clearing-Shapes">Clearing Shapes</a>
+ <li><a accesskey="8" href="#Querying-Shapes">Querying Shapes</a>
+ <li><a accesskey="9" href="#Showing-Shapes">Showing Shapes</a>
+ <li><a href="#Outputting-Shapes">Outputting Shapes</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Shape-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Shape-Operators">Shape Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shape-Reference">Shape Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected static constants: signed short <b>DRAWDOT</b><var><a name="index-DRAWDOT-233"></a></var><br>
+ &mdash; : signed short <b>DRAW</b><var><a name="index-DRAW-234"></a></var><br>
+ &mdash; : signed short <b>FILL</b><var><a name="index-FILL-235"></a></var><br>
+ &mdash; : signed short <b>FILLDRAW</b><var><a name="index-FILLDRAW-236"></a></var><br>
+ &mdash; : signed short <b>UNDRAWDOT</b><var><a name="index-UNDRAWDOT-237"></a></var><br>
+ &mdash; : signed short <b>UNDRAW</b><var><a name="index-UNDRAW-238"></a></var><br>
+ &mdash; : signed short <b>UNFILL</b><var><a name="index-UNFILL-239"></a></var><br>
+ &mdash; : signed short <b>UNFILLDRAW</b><var><a name="index-UNFILLDRAW-240"></a></var><br>
+ <blockquote><p>Values used in the <code>output()</code> functions of the classes derived from
+ <code>Shape</code>.  For example, in <code>Path</code>, if the data member
+ <code>fill_draw_value</code> = <code>DRAW</code>, then the MetaPost command
+ <code>draw</code> is written to <code>out_stream</code> when that <code>Path</code> is
+ output. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Shape-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Copying-Shapes">Copying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shape-Data-Members">Shape Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.2 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-241"></a></var><br>
+      </div>
+ 
+ <div class="node">
+ <a name="Copying-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Shapes">Modifying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shape-Operators">Shape Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.3 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-242"></a></var><br>
+ <blockquote><p>Copies an object, allocating memory on the free store for the copy,
+ and returns a pointer to <code>Shape</code> for accessing the copy.
+ 
+         <p>Used in the drawing and filling functions for copying the <code>Shape</code>,
+ and putting a pointer to the copy onto the <code>vector&lt;Shape*&gt; shapes</code>
+ of the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Copying-Shapes">Copying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.4 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: bool <b>set_on_free_store</b> (<var>bool b = </var><code>true</code>)<var><a name="index-set_005fon_005ffree_005fstore-243"></a></var><br>
+ <blockquote><p>Sets the data member <code>on_free_store</code> to <var>b</var>.  All classes
+ derived from <code>Shape</code> must therefore also have a data member
+ <code>on_free_store</code>.
+ 
+         <p>This function is used in the template function
+ <code>create_new&lt;</code><i>type</i><code>&gt;</code>. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Shapes">Modifying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.5 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual functions: Transform <b>rotate</b> (<var>const real x, const real y, const real z</var>)<var><a name="index-rotate-244"></a></var><br>
+ &mdash; : Transform <b>scale</b> (<var>real x, real y, real z</var>)<var><a name="index-scale-245"></a></var><br>
+ &mdash; : Transform <b>shear</b> (<var>real xy, real xz, real yx, real yz, real zx, real zy</var>)<var><a name="index-shear-246"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>real x, real y, real z</var>)<var><a name="index-shift-247"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, const real r</var>)<var><a name="index-rotate-248"></a></var><br>
+ <blockquote><p>See <a href="#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Applying-Transformations-to-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Clearing-Shapes">Clearing Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.6 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-249"></a></var><br>
+ <blockquote><p>Applies the <code>Transform</code> stored in the <code>transform</code> data member
+ of the <code>Points</code> belonging to the <code>Shape</code> to their
+ <code>world_coordinates</code>.  The <code>transforms</code> are subsequently reset
+ to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Clearing-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Shapes">Querying Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.7 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-250"></a></var><br>
+ <blockquote><p>The precise definition of this function will depend on the nature of the
+ derived class.  In general, it will call the destructor on dynamically
+ allocated objects belonging to the <code>Shape</code>, and deallocate the
+ memory they occupied. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Shapes">Showing Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Clearing-Shapes">Clearing Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.8 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-251"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the object was allocated on the free store,
+ otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Shapes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Shapes">Outputting Shapes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Shapes">Querying Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = 0, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-252"></a></var><br>
+ <blockquote><p>Prints information about an object to standard output. 
+ See the descriptions of <code>show()</code> for the classes derived from
+ <code>Shape</code> for more information. 
+ <!-- !! TO DO:  !! DESCRIBE ARGUMENTS!! -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Shapes"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Shapes">Showing Shapes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Shape-Reference">Shape Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">18.10 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>output</b> (<var>void</var>)<var><a name="index-output-253"></a></var><br>
+ <blockquote><p>Called by <code>Picture::output()</code> for writing MetaPost code to
+ <code>out_stream</code> for a <code>Shape</code> pointed to by a pointer on the
+ <code>vector&lt;Shape*&gt; shapes</code> belonging to the <code>Picture</code>.  Such
+ a <code>Shape</code> will have been created by a drawing or filling
+ function. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-254"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  It determines whether a
+ <code>Shape</code> can be output.  If it can, and an <code>output()</code> function
+ for the type of the <code>Shape</code> exists, a <code>vector&lt;Shape*&gt;</code>
+ containing a pointer to the <code>Shape</code> is returned.
+ 
+         <p>On the other
+ hand, it is possible to define a type derived from <code>Shape</code>, without
+ an <code>output()</code> function of its own, and not derived from a type that
+ has one.  It may then consist of one or more objects of types that do
+ have <code>output()</code> functions.  In this case, the <code>vector&lt;Shape*&gt;</code>
+ returned by <code>extract()</code> will contain pointers to all of these
+ subsidiary <code>Shapes</code>, and <code>Picture::output()</code> will treat them
+ as independent objects.  In particular, if any one of them cannot be
+ projected using the arguments passed to <code>Picture::output()</code>, this
+ will have no effect on whether the others are outputted or not.
+ 
+         <p>Currently, there are no <code>Shapes</code> without an <code>output()</code>
+ function, either belonging to the class, or inherited.  However, it's
+ useful to be able to define <code>Shapes</code> in this way, so that they can
+ be tested without having to define an <code>output()</code> function first. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-255"></a></var><br>
+ <blockquote><p>Sets the values of <code>projective_extremes</code> for the <code>Shape</code>. 
+ This is needed in <code>Picture::output()</code> for determining the order in
+ which objects are output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual functions: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-256"></a></var><br>
+ &mdash; : real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-257"></a></var><br>
+ &mdash; : real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-258"></a></var><br>
+ <blockquote><p>These functions return the minimum, maximum, and mean z-value
+ respectively of the projected <code>Points</code> belonging to
+ the <code>Shape</code>, i.e., from <code>projective_extremes</code>.  The values for
+ the <code>Shapes</code> on the <code>Picture</code> are used for determining the
+ order in which they are output
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> pure virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-259"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-260"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>false</code>.  This function is called in
+ <code>Picture::output()</code>, if a <code>Shape</code> on a <code>Picture</code> cannot
+ be output using the arguments passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Pure virtual function: void <b>unsuppress_output</b> (<var>void</var>)<var><a name="index-unsuppress_005foutput-261"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>true</code>.  Called in
+ <code>Picture::output()</code> after <code>output()</code> is called on the <code>Shapes</code>. 
+ This way, output of <code>Shapes</code> that couldn't be output when
+ <code>Picture::output()</code> was called with a particular set of arguments
+ won't necessarily be suppressed when
+ <code>Picture::output()</code> is called again with different arguments. 
+ </p></blockquote></div>
+ 
+    <p>f<!-- transfor.texi -->
+ 
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Transform-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Label-Reference">Label Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shape-Reference">Shape Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">19 Transform Reference</h2>
+ 
+ <p><a name="index-Transform-262"></a>Class <code>Transform</code> is defined in <samp><span class="file">transfor.web</span></samp>. 
+ <code>Point</code> is a <code>friend</code> of <code>Transform</code>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Transform-Data-Members">Transform Data Members</a>
+ <li><a accesskey="2" href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>
+ <li><a accesskey="3" href="#Transform-Constructors">Transform Constructors </a>
+ <li><a accesskey="4" href="#Transform-Operators">Transform Operators</a>
+ <li><a accesskey="5" href="#Matrix-Inversion">Matrix Inversion</a>
+ <li><a accesskey="6" href="#Setting-Values-Transforms">Setting Values Transforms</a>
+ <li><a accesskey="7" href="#Querying-Transforms">Querying Transforms</a>
+ <li><a accesskey="8" href="#Returning-Information-for-Transforms">Returning Information for Transforms</a>
+ <li><a accesskey="9" href="#Showing-Transforms">Showing Transforms</a>
+ <li><a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>
+ <li><a href="#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>
+ <li><a href="#Resetting-Transforms">Resetting Transforms</a>
+ <li><a href="#Cleaning-Transforms">Cleaning Transforms</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Transform-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Reference">Transform Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Matrix <b>matrix</b><var><a name="index-matrix-263"></a></var><br>
+ <blockquote><p>A 4 X 4
+ 
+         <p>matrix of <code>real</code> representing the actual transformation matrix. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Transform-Global-Variables-and-Constants"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transform-Constructors">Transform Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Data-Members">Transform Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.2 Global Variables and Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Transform <b>user_transform</b><var><a name="index-user_005ftransform-264"></a></var><br>
+ <blockquote><p>Currently has no function.  It is intended to be used for transforming
+ the coordinates of <code>Points</code> between the world coordinate system
+ (WCS) and a user coordinate system (UCS), when routines for managing
+ user coordinate systems are implemented. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: <code>const</code> Transform <b>INVALID_TRANSFORM</b><var><a name="index-INVALID_005fTRANSFORM-265"></a></var><br>
+ <blockquote><p>Every member of <code>matrix</code> in <code>INVALID_TRANSFORM</code> is
+ equal to <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: <code>const</code> Transform <b>IDENTITY_TRANSFORM</b><var><a name="index-IDENTITY_005fTRANSFORM-266"></a></var><br>
+ <blockquote><p>Homogeneous coordinates and <code>Transforms</code> are unchanged by
+ multiplication with <code>IDENTITY_TRANSFORM</code>. 
+ <code>matrix</code> is an identity matrix:
+      <pre class="display">          1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           0 0 0 1
+ </pre>
+         <p>See <a href="#Transforms">Transforms</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Transform-Constructors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Transform-Operators">Transform Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Transform</b> (<var>void</var>)<var><a name="index-Transform-267"></a></var><br>
+ <blockquote><p>Creates a <code>Transform</code> containing the identity matrix. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Transform</b> (<var>real r</var>)<var><a name="index-Transform-268"></a></var><br>
+ <blockquote><p>Creates a <code>Transform</code> and sets all of the elements of <var>matrix</var>
+ to <var>r</var>.  Currently, this
+ constructor is never used, but who knows? Maybe someday it will be
+ useful for something. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Transform</b> (<var>real r0_0, real r0_1, real r2, real r0_2, real r0_3, real r1_0, real r1_1, real r1_2, real r1_3, real r2_0, real r2_1, real r2_2, real r2_3, real r3_0, real r3_1, real r3_2, real r3_3</var>)<var><a name="index-Transform-269"></a></var><br>
+ <blockquote><p>Each of the sixteen <code>real</code> arguments is
+ assigned to the corresponding element of <var>matrix</var>:
+ <code>matrix[0][0] = r0_0</code>, <code>matrix[0][1] = r0_1</code>, etc. 
+ Useful for specifying a transformation matrix completely. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Transform-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Matrix-Inversion">Matrix Inversion</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Constructors">Transform Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Transform <b>operator=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_003d-270"></a></var><br>
+ <blockquote><p>Sets <var>*this</var> to <var>t</var> and returns <var>t</var>.  Returning <var>*this</var>
+ would, of course, have exactly the same effect. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: real <b>operator*=</b> (<var>real r</var>)<var><a name="index-operator_002a_003d-271"></a></var><br>
+ <blockquote><p>Multiplication with assignment by a scalar. 
+ This operator multiplies each element
+ E
+ of <code>matrix</code> by
+ the scalar <var>r</var>. 
+ The return value is <code>r</code>.  This makes it possible to
+ chain invocations of this function:
+ For a_x, b_x, c_x, <small class="dots">...</small>, p_x in R
+ ,
+ x in N
+ 
+      <pre class="example">          Transform T0(a_0, b_0, c_0, d_0,
+                        e_0, f_0, g_0, h_0,
+                        i_0, j_0, k_0 l_0,
+                        m_0, n_0, o_0, p_0);
+           Transform T1(a_1, b_1, c_1, d_1,
+                        e_1, f_1, g_1, h_1,
+                        i_1, j_1, k_1 l_1,
+                        m_1, n_1, o_1, p_1);
+           Transform T2(a_2, b_2, c_2, d_2,
+                        e_2, f_2, g_2, h_2,
+                        i_2, j_2, k_2 l_2,
+                        m_2, n_2, o_2, p_2);
+           real r = 5;
+ </pre>
+         <p>Let M_0, M_1, and M_2 stand for
+ <code>T0.matrix</code>, <code>T1.matrix</code>, and <code>T2.matrix</code>
+ respectively:
+ 
+      <pre class="display">          M_0 =
+           a_0 b_0 c_0 d_0
+           e_0 f_0 g_0 h_0
+           i_0 j_0 k_0 l_0
+           m_0 m_0 o_0 p_0
+           
+           M_1 =
+           a_1 b_1 c_1 d_1
+           e_1 f_1 g_1 h_1
+           i_1 j_1 k_1 l_1
+           m_1 m_1 o_1 p_1
+           
+           M_2 =
+           a_2 b_2 c_2 d_2
+           e_2 f_2 g_2 h_2
+           i_2 j_2 k_2 l_2
+           m_2 m_2 o_2 p_2
+ </pre>
+         <pre class="example">          T0 *= T1 *= T2 *= r;
+ </pre>
+         <p>Now,<br>
+      <pre class="display">          M_0 =
+           5a_0 5b_0 5c_0 5d_0
+           5e_0 5f_0 5g_0 5h_0
+           5i_0 5j_0 5k_0 5l_0
+           5m_0 5m_0 5o_0 5p_0
+           
+           M_1 =
+           5a_1 5b_1 5c_1 5d_1
+           5e_1 5f_1 5g_1 5h_1
+           5i_1 5j_1 5k_1 5l_1
+           5m_1 5m_1 5o_1 5p_1
+           
+           M_2 =
+           5a_2 5b_2 5c_2 5d_2
+           5e_2 5f_2 5g_2 5h_2
+           5i_2 5j_2 5k_2 5l_2
+           5m_2 5m_2 5o_2 5p_2
+ </pre>
+         <p>This function is not currently used anywhere, but it may turn out to be
+ useful for something. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Transform <b>operator*</b> (<var>const real r</var>)<var><a name="index-operator_002a-272"></a></var><br>
+ <blockquote><p>Multiplication of a <code>Transform</code> by a scalar without assignment. 
+ The return value is a <code>Transform</code>
+ A. 
+ If <code>this.matrix</code> has elements
+ E_T, then <code>A.matrix</code> has elements E_A such that
+ E_A = r * E_T
+ 
+         <p>for all E. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-273"></a></var><br>
+ <blockquote><p>Performs matrix multiplication on <code>matrix</code> and
+ <code>t.matrix</code>.  The result is assigned to <code>matrix</code>. 
+ <var>t</var> is returned, <em>not</em> <code>*this</code>!  This makes it possible to
+ chain invocations of this function:
+ 
+      <pre class="example">          Transform a;
+           a.shift(1, 1, 1);
+           Transform b;
+           b.rotate(0, 90);
+           Transform c;
+           c.shear(5, 4);
+           Transform d;
+           d.scale(3, 4, 5);
+ </pre>
+         <p>Let a_m, b_m, and c_m stand for
+ <code>a.matrix</code>, <code>b.matrix</code>, <code>c.matrix</code>, and <code>d.matrix</code>
+ respectively:
+      <pre class="display">          a_m =
+           1        0        0        0
+           0        1        0        0
+           0        0        1        0
+           1        1        1        1
+           
+           b_m =
+            0.5      0.5        0.707      0
+            0.146    0.854     -0.5        0
+           -0.854    0.146      0.5        0
+            0        0          0          1
+           
+           c_m =
+            1       12       14        0
+           10        1       15        0
+           11       13        1        0
+            0        0        0        1
+           
+           d_m =
+           3        0        0        0
+           0        4        0        0
+           0        0        5        0
+           0        0        0        1
+ </pre>
+         <p><code>a *= b *= c *= d;</code><br>
+ <code>a</code>, <code>b</code>, and <code>c</code> are transformed by <code>d</code>, which
+ remains unchanged.
+ 
+      <p class="noindent">Now,
+      <pre class="display">          a_m =
+           3        0        0        0
+           0        4        0        0
+           0        0        5        0
+           3        4        5        1
+           
+           b_m =
+            1.5     2       3.54  0
+           -0.439   3.41   -2.5   0
+           -2.56    0.586   2.5   0
+            0       0       0     1
+           
+           c_m =
+            3       48       70        0
+           30        4       75        0
+           33       52        5        0
+            0        0        0        1
+ </pre>
+         <p>d_m is unchanged.
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Transform <b>operator*</b> (<var>const Transform t</var>)<var><a name="index-operator_002a-274"></a></var><br>
+ <blockquote><p>Multiplication of a <code>Transform</code> by another <code>Transform</code> without
+ assignment. 
+ The return value is a <code>Transform</code> whose <code>matrix</code> contains
+ values that are the result of the matrix multiplication of
+ <code>matrix</code> and <code>t.matrix</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Matrix-Inversion"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Setting-Values-Transforms">Setting Values Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Operators">Transform Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.5 Matrix Inversion</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Transform <b>inverse</b> (<var>void</var>)<var><a name="index-inverse-275"></a></var><br>
+ &mdash; Function: Transform <b>inverse</b> ([<var>bool assign = </var><code>false</code>])<var><a name="index-inverse-276"></a></var><br>
+ <blockquote><p>Returns a <code>Transform</code> <code>T</code> with a <code>T.matrix</code> that is the
+ inverse of <code>matrix</code>.  If <var>assign</var>==<code>true</code>, then
+ <code>matrix</code> is set to its inverse.
+ 
+         <p>In the <code>const</code> version, <code>matrix</code> remains unchanged. 
+ The second should only ever be called with <code>true</code> as its
+ <var>assign</var> argument.  If you're tempted call <code>inverse(false)</code>,
+ you might as well just leave out the argument, which issues a warning
+ message, and calls the <code>const</code> version. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Setting-Values-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Transforms">Querying Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Matrix-Inversion">Matrix Inversion</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.6 Setting Values</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_element</b> (<var>const unsigned short row, const unsigned short col, real r</var>)<var><a name="index-set_005felement-277"></a></var><br>
+ <blockquote><p>Sets the element of <code>matrix</code> indicated by the arguments to <var>r</var>.
+ 
+      <pre class="example">          Transform t;
+           t.set_element(0, 2, -3.45569);
+           t.show("t:");
+           -| t:
+                 1       0   -3.46       0
+                 0       1       0       0
+                 0       0       1       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Information-for-Transforms">Returning Information for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Setting-Values-Transforms">Setting Values Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>is_identity</b> (<var>void</var>)<var><a name="index-is_005fidentity-278"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if <code>*this</code> is the identity <code>Transform</code>,
+ otherwise <code>false</code>.  This function has both a <code>const</code> and a
+ non-<code>const</code> version.  In the non-<code>const</code> version,
+ <code>clean()</code> is called on <code>*this</code> before comparing the elements of
+ <code>matrix</code> with 1 (for the main diagonal) and 0 (for the other
+ elements).  In the <code>const</code> version, <code>*this</code> is copied,
+ <code>clean()</code> is called on the copy, and the elements of the copy's
+ <code>matrix</code> are compared with 0 and 1. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_element</b> (<var>const unsigned short row, const unsigned short col</var>)<var><a name="index-get_005felement-279"></a></var><br>
+ <blockquote><p>Returns the value stored in the element of <code>matrix</code> indicated by the arguments.
+ 
+      <pre class="example">          Transform t;
+           t.shift(1, 2, 3);
+           t.scale(2.5, -1.2, 4);
+           t.rotate(30, 15, 60);
+           t.show("t:");
+           -| t:
+               1.21    2.09   0.647       0
+              0.822  -0.654    0.58       0
+              -2.18   0.224    3.35       0
+              -3.69    1.45    11.8       1
+           cout &lt;&lt; t.get_element(2, 1);
+           -| 0.224
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Information-for-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Transforms">Showing Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Transforms">Querying Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.8 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: real <b>epsilon</b> (<var>void</var>)<var><a name="index-epsilon-280"></a></var><br>
+ <blockquote><p>Returns the positive <code>real</code> value of smallest magnitude
+ \epsilon which an element of a <code>Transform</code> should
+ contain.  An element of a <code>Transform</code> may also contain
+ -\epsilon.
+ 
+         <p>The value \epsilon is used for in the
+ function <code>clean()</code> (see <a href="#Cleaning-Transforms">Transform Reference; Cleaning</a>). 
+ It will also be used for comparing <code>Transforms</code>, when I've added
+ the equality operator <code>Transform::operator==()</code>.
+ 
+         <p><code>epsilon()</code> returns different values, depending on whether
+ <code>real</code> is <code>float</code> or <code>double</code>:
+ If <code>real</code> is <code>float</code> (the default), <code>epsilon()</code>
+ returns 0.00001. 
+ If <code>real</code> is <code>double</code>, it returns 0.000000001.
+ 
+         <p><b>Please note</b>:  I haven't tested whether 0.000000001 is a good
+ value yet, so users should be aware of this if they set <code>real</code> to
+ <code>double</code>!<a rel="footnote" href="#fn-29" name="fnd-29"><sup>29</sup></a>
+ The way to test this is to transform two different
+ <code>Transforms</code>
+ t_1 and t_2
+ using different rotations in such a way that the end
+ result should be the same for both <code>Transforms</code>. 
+ Let \epsilon stand for the value returned by <code>epsilon()</code>. 
+ If for all sets of
+ corresponding elements E_1 and E_2 of t_1 and
+ t_2, ||E_1| - |E_2|| \le \epsilon, then
+ \epsilon is a good value. 
+ <!-- !! TO DO: -->
+ It will be easier to test this when I've added
+ <code>Transform::operator==()</code>.
+ 
+         <p>Rotation causes a significant loss of precision to due to the use of the
+ <code>sin()</code> and <code>cos()</code> functions.  Therefore, neither
+ <code>Transform::epsilon()</code> nor <code>Point::epsilon()</code>
+ (see <a href="#Returning-Information-for-Points">Point Reference; Returning Information</a>) can be as small as I'd like them to be.  If they are two
+ small, operations that test for equality of <code>Transforms</code> and
+ <code>Points</code> will return <code>false</code> for objects that should be equal. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Information-for-Transforms">Returning Information for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-281"></a></var><br>
+ <blockquote><p>If the optional argument <var>text</var> is used, and is not the empty
+ <code>string</code> (<var>""</var>), <var>text</var> is printed on a line of its own to
+ the standard output first.  Otherwise, <code>"Transform:"</code> is printed
+ on a line of its own to the standard output. 
+ Then, the elements of <code>matrix</code> are printed to standard output.
+ 
+      <pre class="example">          Transform t;
+           t.show("t:");
+           -| t:
+                 1       0       0       0
+                 0       1       0       0
+                 0       0       1       0
+                 0       0       0       1
+           t.scale(1, 2, 3);
+           t.shift(1, 1, 1);
+           t.rotate(90, 90, 90);
+           t.show("t:");
+           -| t:
+                 0       0       1       0
+                 0       2       0       0
+                -3       0       0       0
+                -1       1       1       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Transforms">Showing Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.10 Affine Transformations</h3>
+ 
+ <p>The affine transformation functions use their arguments to create a new
+ <code>Transform</code> <code>t</code> (local to the function) representing the
+ appropriate transformation. Then, <code>*this</code> is multiplied by <code>t</code>
+ and <code>t</code> is returned. 
+ Returning <code>t</code> instead of <code>*this</code> makes it possible to put the
+ affine transformation function at the end of a chain of invocations of
+ <code>Transform::operator*=()</code>:
+ 
+ <pre class="example">     Transform t0, t1, t2, t3;
+      ...
+      t0 *= t1 *= t2 *= t3.scale(2, 3.5, 9);
+ </pre>
+    <p><code>t0</code>, <code>t1</code>, and <code>t2</code> are all multiplied by the
+ <code>Transform</code> with
+ <pre class="display">     <code>matrix</code> =
+      2   0    0  0
+      0   3.5  0  0
+      0   0    9  0
+      0   0    0  1
+ </pre>
+    <p>representing the scaling operation, <em>not</em> <code>t3</code>, which may
+ represent a combination of transformations.
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-282"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> representing the scaling operation locally,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>. 
+ A <code>Transform</code> representing scaling only, when applied to a
+ <code>Point p</code>, will cause its x-coordinate to be multiplied by
+ <var>x</var>, its y-coordinate to be multiplied by <var>y</var>, and its
+ z-coordinate to be multiplied by <var>z</var>.
+ 
+      <pre class="example">          <code>Transform t;</code>
+           <code>t.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>);</code>
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           x 0 0 0
+           0 y 0 0
+           0 0 z 0
+           0 0 0 1
+ </pre>
+         <pre class="example">          Transform t;
+           t.scale(12.5, 20, 1.3);
+           t.show("t:");
+           -| t:
+              12.5       0       0       0
+                 0      20       0       0
+                 0       0     1.3       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-283"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> representing the shearing operation locally,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>.
+ 
+         <p>When applied to a <code>Point</code>, shearing causes each coordinate to be
+ modified according to the values of the other coordinates and the
+ arguments to <code>shear</code>:
+ 
+      <pre class="example">          Point p(x,y,z);
+           Transform t;
+           t.shear(a, b, c, d, e, f);
+           p *= t;
+ </pre>
+         <pre class="display">          &rArr; p = ((x + ay + bz), (y + cx + dz), (z + ex + fy))
+ </pre>
+         <pre class="example">          Transform t;
+           t.shear(2, 3, 4, 5, 6, 7);
+           t.show("t:");
+           -| t:
+                 1       4       6       0
+                 2       1       7       0
+                 3       5       1       0
+                 0       0       0       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-284"></a></var><br>
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-285"></a></var><br>
+ <blockquote>
+         <p>These functions create a <code>Transform t</code> representing the shifting
+ operation locally, multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>.
+ 
+         <p>The version with the argument <code>const Point&amp;</code> <var>p</var>
+ passes the updated x, y, and z-coordinates of <var>p</var> (from
+ <code>world_coordinates</code>) to the
+ version with three <code>real</code> arguments.
+ 
+         <p>When a <code>Transform</code> representing a single shifting operation only
+ is applied to a <code>Point</code>, the <var>x</var>,
+ <var>y</var>, and <var>z</var> arguments are added to the corresponding
+ coordinates of the <code>Point</code>:
+ 
+      <pre class="example">          Point p(x,y,z);
+           Transform t;
+           t.shift(a, b, c);
+           p *= t;
+ </pre>
+         <pre class="display">          &rArr; p = (x + a, y + b, z + c)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-286"></a></var><br>
+ <blockquote><p>Multiplies the corresponding elements of <code>matrix</code> by
+ the <code>real</code> arguments, i.e.,
+ <code>matrix[3][0]</code> is multiplied by <var>x</var>,
+ <code>matrix[3][1]</code> is multiplied by <var>y</var>, and
+ <code>matrix[3][2]</code> is multiplied by <var>z</var>.  Returns <code>*this</code>.
+ 
+         <p>Ordinary shifting is additive, so a special function is needed to
+ multiply the elements of <code>matrix</code> responsible for shifting. 
+ The effect of <code>shift_times()</code> is to modify a <code>Transform</code>
+ representing a shifting operation such that the direction of the shift
+ is maintained, while changing the distance.
+ 
+         <p>If the <code>Transform</code> represents other operations in addition to
+ shifting, e.g., scaling and/or shearing, the effect of
+ <code>shift_times()</code> may be unpredictable.<a rel="footnote" href="#fn-30" name="fnd-30"><sup>30</sup></a>
+ 
+      <pre class="example">          Transform t;
+           t.shift(1, 2, 3);
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           1 2 3 1
+ </pre>
+         <pre class="example">          t.shift_times(2, 2, 2);
+ </pre>
+         <pre class="display">          &rArr; <code>t.matrix</code> =
+           1 0 0 0
+           0 1 0 0
+           0 0 1 0
+           2 4 6 1
+ </pre>
+         <pre class="example">          Rectangle r[4];
+           r[0].set(origin, 1, 1, 90);
+           r[3] = r[2] = r[1] = r[0];
+           Transform t;
+           t.shift(1.5, 1.5);
+           r[0] *= t;
+           r[0].draw();
+           t.shift_times(1.5, 1.5);
+           r[1] *= t;
+           r[1].draw();
+           t.shift_times(1.5, 1.5);
+           r[2] *= t;
+           r[2].draw();
+           t.shift_times(1.5, 1.5);
+           r[3] *= t;
+           r[3].draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF73.png"
+ alt="[Figure 73. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 73. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Cuboid c(origin, 1, 1, 1);
+           c.draw();
+           Transform t;
+           t.rotate(30, 30, 30);
+           t.shift(1, 0, 1);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+           t.shift_times(1.5, 0, 1.5);
+           c *= t;
+           c.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF74.png"
+ alt="[Figure 74. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 74. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-rotate-287"></a></var><br>
+ <blockquote><p>Rotation around the main axes. 
+ Creates a <code>Transform t</code> representing the rotation,
+ multiplies <code>*this</code> by <code>t</code>, and returns <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>Point p0, Point p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-288"></a></var><br>
+ <blockquote><p>Rotation around an arbitrary axis.  The <code>Point</code> arguments represent
+ the end points of the axis, and <var>angle</var> is the angle of rotation. 
+ Since 180 degrees
+  rotation is needed so often, 180 is the default for
+ <var>angle</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-289"></a></var><br>
+ <blockquote><p>Rotation around an arbitrary axis.  <code>Path</code> argument. 
+ The <code>Path</code> <var>p</var> must be linear, i.e., <code>p.is_linear()</code> must
+ return <code>true</code>.  See <a href="#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Alignment-with-an-Axis-for-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Resetting-Transforms">Resetting Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.11 Alignment with an Axis</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>Point p0, Point p1, </var>[<var>char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-290"></a></var><br>
+ <blockquote><p>Returns the <code>Transform</code> that would align the line through <var>p0</var>
+ and <var>p1</var> with the major axis denoted by the <var>axis</var> argument. 
+ The default is the z-axis.  This function is used in the functions that
+ find intersections.
+ 
+      <pre class="example">          Point P0(1, 1, 1);
+           Point P1(2, 3, 4);
+           P0.draw(P1);
+           P0.dotlabel("$P_0$");
+           P1.dotlabel("$P_1$");
+           Transform t;
+           t.align_with_axis(P0, P1, 'z');
+           P0 *= P1 *= t;
+           t.show("t:");
+           -| t:
+                0.949  -0.169   0.267       0
+                    0   0.845   0.535       0
+               -0.316  -0.507   0.802       0
+               -0.632  -0.169    -1.6       1
+           P0.show("P0:");
+           -| P0: (0, 0, 0)
+           P1.show("P1:");
+           -| P1: (0, 0, 3.74)
+ </pre>
+         <p>The following example shows how <code>align_with_axis()</code> can be used for
+ putting plane figures into a
+ major plane.
+ 
+      <pre class="example">          default_focus.set(2, 3, -10, 2, 3, 10, 10);
+           Circle c(origin, 3, 75, 25, 6);
+           c.shift(2, 3);
+           c.draw();
+           Point n = c.get_normal();
+           n.shift(c.get_center());
+           Transform t;
+           t.align_with_axis(c.get_center(), n, 'y');
+           t.show("t:");
+           -| t:
+             0.686   0.379  -0.621       0
+             0.543     0.3   0.784       0
+             0.483  -0.875       0       0
+                -3   -1.66   -1.11       1
+           n *= c *= t;
+           c.draw();
+           c.show("c:");
+           -| c:
+           fill_draw_value == 0
+           (1.31, 0, -0.728) .. (1.49, 0, -0.171) ..
+           (1.44, 0, 0.413) .. (1.17, 0, 0.933) ..
+           (0.728, 0, 1.31) .. (0.171, 0, 1.49) ..
+           (-0.413, 0, 1.44) .. (-0.933, 0, 1.17) ..
+           (-1.31, 0, 0.728) .. (-1.49, 0, 0.171) ..
+           (-1.44, 0, -0.413) .. (-1.17, 0, -0.933) ..
+           (-0.728, 0, -1.31) .. (-0.171, 0, -1.49) ..
+           (0.413, 0, -1.44) .. (0.933, 0, -1.17) .. cycle;
+           n.show("n:");
+           -| n: (0, 1, 0)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF75.png"
+ alt="[Figure 75. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 75. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Resetting-Transforms"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Cleaning-Transforms">Cleaning Transforms</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.12 Resetting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset</b> (<var>void</var>)<var><a name="index-reset-291"></a></var><br>
+ <blockquote><p>Resets <var>matrix</var> to the identity matrix. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Cleaning-Transforms"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Resetting-Transforms">Resetting Transforms</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Transform-Reference">Transform Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">19.13 Cleaning</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clean</b> (<var>void</var>)<var><a name="index-clean-292"></a></var><br>
+ <blockquote><p>Sets elements in <var>matrix</var> whose absolute values are
+ &lt; <code>epsilon()</code> to 0. 
+ </p></blockquote></div>
+ 
+ <!-- label.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Label-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Picture-Reference">Picture Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Transform-Reference">Transform Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">20 Label Reference</h2>
+ 
+ <p><a name="index-Label-293"></a>Class <code>Label</code> is defined in <samp><span class="file">pictures.web</span></samp>. 
+ <code>Point</code> and <code>Picture</code> are <code>friends</code> of <code>Label</code>.
+ 
+    <p>Labels can be included in drawings by using the <code>label()</code> and
+ <code>dotlabel()</code> functions, which are currently defined for the classes
+ <code>Point</code> and <code>Path</code>, and the classes derived from them. 
+ See <a href="#Labelling-Points">Point Reference; Labelling</a>, and
+ See <a href="#Labelling-Paths">Path Reference; Labelling</a>. 
+ They are currently not defined for <code>Solid</code>, and its derived classes. 
+ I plan to add them for <code>Solid</code> soon.
+ 
+    <p>Users will normally
+ never need to declare objects of type <code>Label</code>, access its data
+ members or call its member functions directly.
+ 
+    <p>When <code>label()</code> or <code>dotlabel()</code> is invoked, one or more <code>Labels</code> is
+ allocated dynamically and pointers to the new <code>Labels</code> are placed
+ onto the <code>vector&lt;Label*&gt; labels</code> of a <code>Picture</code>:
+ <code>current_picture</code>, by default.  There are no explicitly defined
+ constructors for <code>Label</code>, nor is it intended that <code>Labels</code>
+ ever be created in any way other than through <code>label()</code> or
+ <code>dotlabel()</code>.  When a <code>Picture</code> is copied, the <code>Labels</code> are
+ copied, too, and when a <code>Picture</code> is cleared (using
+ <code>Picture::clear()</code>) or destroyed, the <code>Labels</code> are deallocated
+ and destroyed.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Label-Data-Members">Label Data Members</a>
+ <li><a accesskey="2" href="#Copying-Labels">Copying Labels</a>
+ <li><a accesskey="3" href="#Outputting-Labels">Outputting Labels</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Label-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Copying-Labels">Copying Labels</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Label-Reference">Label Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Label-Reference">Label Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">20.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point* <b>pt</b><var><a name="index-pt-294"></a></var><br>
+ <blockquote><p>A pointer to the <code>Point</code> representing the location of the
+ <code>Label</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>dot</b><var><a name="index-dot-295"></a></var><br>
+ <blockquote><p><code>true</code> if the label should be dotted, otherwise
+ <code>false</code>.
+ 
+         <p><code>dot</code> will be <code>false</code>, if the label was generated
+ by a call to <code>label()</code> with the &ldquo;<code>dot</code>&rdquo; argument
+ <code>false</code> (the default), <code>true</code>, if
+ the label was generated by a call to <code>dotlabel()</code>,
+ or to <code>label()</code> with the &ldquo;<code>dot</code>&rdquo; argument
+ <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>text</b><var><a name="index-text-296"></a></var><br>
+ <blockquote><p>The text of the label. 
+ <var>text</var> is always put between &ldquo;<code>btex</code>&rdquo; and &ldquo;<code>etex</code>&rdquo; in
+ the MetaPost code, so that TeX will be used to format the labels. In
+ particular, this means that TeX's math mode can be used.  However,
+ double backslashes must be used instead of single backslashes, in order
+ that single backslashes be written to <code>out_stream</code>.
+ 
+      <pre class="example">          Point P(1, 1, 2);
+           origin.drawarrow(P);
+           P.label("$\\vec{P}$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF76.png"
+ alt="[Figure 76. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 76. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>position</b><var><a name="index-position-297"></a></var><br>
+ <blockquote><p>The position of the text with respect to
+ <code>*pt</code>.  Valid values are as in MetaPost:
+ &ldquo;top&rdquo;, &ldquo;bot&rdquo; (bottom), &ldquo;lft&rdquo; (left), &ldquo;rt&rdquo;
+ (right), &ldquo;ulft&rdquo; (upper left),
+ &ldquo;llft&rdquo; (lower left), &ldquo;urt&rdquo; (upper right),
+ &ldquo;lrt&rdquo; (lower right). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: bool <b>DO_LABELS</b><var><a name="index-DO_005fLABELS-298"></a></var><br>
+ <blockquote><p>Enables or disables creation
+ of <code>Labels</code>.  If <code>true</code>, <code>label</code>
+ and <code>dotlabel()</code> cause <code>Labels</code> to be
+ created and put onto a <code>Picture</code>.  If
+ <code>false</code>, they are not.  Note that it is also
+ possible to suppress output of existing
+ <code>Labels</code> when outputting a <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Copying-Labels"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Labels">Outputting Labels</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Label-Data-Members">Label Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Label-Reference">Label Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">20.2 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> Function: Label* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-299"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Label</code> and returns a pointer to the copy. 
+ Called in <code>Picture::operator=()</code> and <code>Picture::operator+=()</code>
+ where <code>Pictures</code> are copied. 
+ Users should never need to call this function directly. 
+ See <a href="#Picture-Operators">Picture Reference; Operators</a>.
+ 
+         <p>This function dynamically allocates a new
+ <code>Label</code> and a new <code>Point</code> within the <code>Label</code>, and copies
+ the <code>strings</code> from <code>*this</code> to the new <code>Label</code>.  The
+ standard library functions for <code>strings</code> take care of the
+ allocation for the <code>string</code> members of <code>Label</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Labels"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Copying-Labels">Copying Labels</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Label-Reference">Label Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">20.3 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>const Focus&amp; f, const unsigned short proj, real factor, const Transform&amp; t</var>)<var><a name="index-output-300"></a></var><br>
+ <blockquote><p>Writes MetaPost code for the labels to <code>out_stream</code>. 
+ It is called in <code>Picture::output()</code>
+ (see <a href="#Outputting-Pictures">Picture Reference; Outputting</a>). 
+ Users should never need to call this function directly.
+ 
+         <p>When <code>Picture::output()</code> is
+ invoked, the MetaPost code for <code>Labels</code> is written to <code>out_stream</code>
+ after the code for the drawing and filling commands.  This prevents the
+ <code>Labels</code> from being covered up.  However, they can still be covered
+ by other <code>Labels</code>, or by <code>Shapes</code> or <code>Labels</code> from
+ subsequent invocations of <code>Picture::output()</code> within the same
+ figure (see <a href="#I_002fO-Functions">I/O Functions</a>, for descriptions of <code>beginfig() and
+ endfig()</code>). 
+ </p></blockquote></div>
+ 
+ <!-- picture.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Picture-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Reference">Point Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Label-Reference">Label Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">21 Picture Reference</h2>
+ 
+ <p><a name="index-Picture-301"></a>Class <code>Picture</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Picture-Data-Members">Picture Data Members</a>
+ <li><a accesskey="2" href="#Picture-Global-Variables">Picture Global Variables</a>
+ <li><a accesskey="3" href="#Picture-Constructors">Picture Constructors</a>
+ <li><a accesskey="4" href="#Picture-Operators">Picture Operators</a>
+ <li><a accesskey="5" href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>
+ <li><a accesskey="6" href="#Modifying-Pictures">Modifying Pictures</a>
+ <li><a accesskey="7" href="#Showing-Pictures">Showing Pictures</a>
+ <li><a accesskey="8" href="#Outputting-Pictures">Outputting Pictures</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Picture-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Picture-Global-Variables">Picture Global Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Reference">Picture Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-302"></a></var><br>
+ <blockquote><p>Applied to the <code>Shapes</code> on the <code>Picture</code> when the latter is
+ output.  It is initialized as the identity <code>Transform</code>, and can be
+ modified by the transformation functions, by
+ <code>Picture::operator*=(const Transform&amp;)</code>
+ (see <a href="#Picture-Operators">Picture Reference; Operators</a>), and by
+ <code>Picture::set_transform()</code>
+ (see <a href="#Modifying-Pictures">Picture Reference; Modifying</a>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: vector&lt;Shape*&gt; <b>shapes</b><var><a name="index-shapes-303"></a></var><br>
+ <blockquote><p>Contains pointers to the <code>Shapes</code> on the <code>Picture</code>. 
+ When a drawing or filling function is invoked for a <code>Shape</code>, a copy
+ is dynamically allocated and a pointer to the copy is placed onto
+ <code>shapes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: vector&lt;Label*&gt; <b>labels</b><var><a name="index-labels-304"></a></var><br>
+ <blockquote><p>Contains pointers to the <code>Labels</code> on the <code>Picture</code>.  When a
+ <code>Point</code> is labelled, either directly or through a call to
+ <code>label()</code> or <code>dotlabel()</code> for another type of
+ <code>Shape</code><a rel="footnote" href="#fn-31" name="fnd-31"><sup>31</sup></a>,
+ a <code>Label</code> is dynamically allocated, the <code>Point</code> is copied to
+ <code>*Label::pt</code>, and a pointer to the <code>Label</code> is placed onto
+ <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>do_labels</b><var><a name="index-do_005flabels-305"></a></var><br>
+ <blockquote><p>Used for enabling or disabling output of <code>Labels</code> when outputting a
+ <code>Picture</code>.  The default value is <code>true</code>.  It is set to
+ <code>false</code> by using <code>suppress_labels()</code> and can be reset to
+ <code>true</code> by using <code>unsuppress_labels()</code>. 
+ See <a href="#Picture-Output-Functions">Picture Reference; Output Functions</a>.
+ 
+         <p>Often, when a <code>Picture</code> is copied, transformed, and output again in
+ a single figure, it's undesirable to have the <code>Labels</code> output again
+ in their new positions.  To avoid this, use <code>suppress_labels()</code>
+ after outputting the <code>Picture</code> the first time. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Picture-Global-Variables"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Picture-Constructors">Picture Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Data-Members">Picture Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.2 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Variable <b>Picture</b><var> current_picture<a name="index-Picture-306"></a></var><br>
+ <blockquote><p>The <code>Picture</code> used as the default by the drawing and filling
+ functions. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Picture-Constructors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Picture-Operators">Picture Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Global-Variables">Picture Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.3 Constructors</h3>
+ 
+ <!-- !! Change text for all default constructors, as below. -->
+ <div class="defun">
+ &mdash; Default constructor: void <b>Picture</b> (<var>void</var>)<var><a name="index-Picture-307"></a></var><br>
+ <blockquote><p>Creates an empty <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Picture</b> (<var>const Picture&amp; p</var>)<var><a name="index-Picture-308"></a></var><br>
+ <blockquote><p>Creates a copy of <code>Picture</code> <var>p</var>.
+ 
+      <pre class="example">          Circle c(origin, 3);
+           c.draw();
+           current_picture.output(Projections::PARALLEL_X_Z);
+           Picture new_picture(current_picture);
+           new_picture.shift(2);
+           new_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF77.png"
+ alt="[Figure 77. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 77. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Picture-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Constructors">Picture Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Picture&amp; p</var>)<var><a name="index-operator_003d-309"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>p</var>, destroying the old contents of <code>*this</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>const Picture&amp; p</var>)<var><a name="index-operator_002b_003d-310"></a></var><br>
+ <blockquote><p>Adds the contents of <var>p</var> to <code>*this</code>.  <var>p</var> remains unchanged. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Shape* s</var>)<var><a name="index-operator_002b_003d-311"></a></var><br>
+ <blockquote><p>Puts <var>s</var> onto <code>shapes</code>.  Note that the pointer <var>s</var>
+ itself is put onto <code>shapes</code>, so any allocation and copying must be
+ performed first.  This is a low-level function that users normally won't
+ need to use directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Label* label</var>)<var><a name="index-operator_002b_003d-312"></a></var><br>
+ <blockquote><p>Puts <var>label</var> onto <code>labels</code>. 
+ Note that the pointer <var>label</var>
+ itself is put onto <code>labels</code>, so any allocation and copying must be
+ performed first.  This is a low-level function that users normally won't
+ need to invoke directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-313"></a></var><br>
+ <blockquote><p>Multiplies <code>transform</code> by <var>t</var>.  This has the effect of
+ transforming all of the <code>Shapes</code> on <code>shapes</code> and all of
+ the <code>Points</code> of the <code>Labels</code> on <code>labels</code> by <var>t</var> upon
+ output.
+ 
+      <pre class="example">          Transform t;
+           t.rotate(0, 0, 180);
+           t.shift(3);
+           Reg_Polygon pl(origin, 5, 3, 90);
+           pl.draw();
+           pl.label();
+           current_picture.output(Projections::PARALLEL_X_Y);
+           current_picture *= t;
+           current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF78.png"
+ alt="[Figure 78. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 78. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Pictures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Pictures">Modifying Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Operators">Picture Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.5 Affine Transformations</h3>
+ 
+ <p>The functions in this section all operate on the <code>transform</code> data
+ member of the <code>Picture</code> and return a <code>Transform</code> representing the
+ transformation&mdash;<em>not</em> <code>transform</code>.
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-314"></a></var><br>
+ <blockquote><p>Performs <code>transform.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of scaling
+ all of the elements of <code>shapes</code> and <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-315"></a></var><br>
+ <blockquote><p>Performs <code>transform.shift(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of shifting
+ all of the <code>Shapes</code> and <code>Labels</code> on the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-316"></a></var><br>
+ <blockquote><p>Performs <code>transform.shift(</code><var>p</var><code>)</code> and returns
+ the result.  This has the effect of shifting
+ all of the <code>Shapes</code> and <code>Labels</code> on the <code>Picture</code> by the
+ x, y, and z-coordinates of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-317"></a></var><br>
+ <blockquote><p>Performs <code>transform.rotate(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns
+ the result.  This has the effect of rotating
+ all of the elements of <code>shapes</code> and <code>labels</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var>;<a name="index-rotate-318"></a></var><br>
+ <blockquote><p>Performs <code>transform.rotate(</code><var>p0</var><code>, </code><var>p1</var><code>, </code><var>angle</var><code>)</code> and returns
+ the result.  This has the effect of rotating
+ all of the elements of <code>shapes</code> and <code>labels</code> about the line
+ from p_0 to p_1. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Pictures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Pictures">Showing Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.6 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-319"></a></var><br>
+ <blockquote><p>Destroys the <code>Shapes</code> and <code>Labels</code> on the
+ <code>Picture</code> and removes all the <code>Shape</code> pointers from
+ <code>shapes</code> and the <code>Label</code> pointers from <code>labels</code>. 
+ All dynamically allocated objects are deallocated, namely the
+ <code>Shapes</code>, the <code>Labels</code>, and the <code>Points</code> belonging to the
+ <code>Labels</code>. <code>transform</code> is reset to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_transform</b> (<var>void</var>)<var><a name="index-reset_005ftransform-320"></a></var><br>
+ <blockquote><p>Resets <code>transform</code> to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>set_transform</b> (<var>const Transform&amp; t</var>)<var><a name="index-set_005ftransform-321"></a></var><br>
+ <blockquote><p>Sets <code>transform</code> to <code>t</code> and returns <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>kill_labels</b> (<var>void</var>)<var><a name="index-kill_005flabels-322"></a></var><br>
+ <blockquote><p>Removes the <code>Labels</code> from the <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Pictures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Pictures">Outputting Pictures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Pictures">Modifying Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show</b> ([<var>string text = "", </var>[<var>bool stop = </var><code>false</code>]])<var><a name="index-show-323"></a></var><br>
+ <blockquote><p>Prints information about the <code>Picture</code> to standard output.
+ 
+         <p><code>show()</code> first prints the string <code>"Showing Picture:"</code> to
+ standard output, followed by <var>text</var>, if the latter is not the empty
+ string (<code>""</code>)<a rel="footnote" href="#fn-32" name="fnd-32"><sup>32</sup></a>. 
+ Then it calls <code>transform.show()</code>, prints the size of <code>shapes</code> and
+ <code>labels</code>, and the value of <code>do_labels</code>.  Then it calls
+ <code>show()</code> on each of the <code>Shapes</code> on <code>shapes</code>.  Since
+ <code>show()</code> is a <code>virtual</code> function in <code>class Shape</code>, the
+ appropriate <code>show()</code> is called for each <code>Shape</code>, i.e.,
+ <code>Point::show()</code> for a <code>Point</code>, <code>Path::show()</code> for a
+ <code>Path</code>, etc.  If <var>stop</var> is <code>true</code>, execution stops and the
+ user is requested to type &lt;RETURN&gt; to continue.  Finally, the string
+ <code>"Done showing picture."</code> is printed to standard output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_transform</b> ([<var>string text = "Transform from Picture:"</var>])<var><a name="index-show_005ftransform-324"></a></var><br>
+ <blockquote><p>Calls <code>transform.show()</code>, passing <var>text</var> as the argument to the
+ latter function. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Pictures"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Pictures">Showing Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Reference">Picture Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">21.8 Outputting</h3>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ <li><a accesskey="2" href="#Picture-Output-Functions">Picture Output Functions</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Picture-Output-Namespaces"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Picture-Output-Functions">Picture Output Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Outputting-Pictures">Outputting Pictures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Outputting-Pictures">Outputting Pictures</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">21.8.1 Namespaces</h4>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Namespace-Projections">Namespace Projections</a>
+ <li><a accesskey="2" href="#Namespace-Sorting">Namespace Sorting</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Namespace-Projections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Namespace-Sorting">Namespace Sorting</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Output-Namespaces">Picture Output Namespaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">21.8.1.1 Namespace Projections</h5>
+ 
+ <p>The namespace <code>Projections</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <div class="defun">
+ &mdash; Constant: const unsigned short <b>PERSP</b><var><a name="index-PERSP-325"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_X_Y</b><var><a name="index-PARALLEL_005fX_005fY-326"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_X_Z</b><var><a name="index-PARALLEL_005fX_005fZ-327"></a></var><br>
+ &mdash; Constant: const unsigned short <b>PARALLEL_Z_Y</b><var><a name="index-PARALLEL_005fZ_005fY-328"></a></var><br>
+ &mdash; Constant: const unsigned short <b>AXON</b><var><a name="index-AXON-329"></a></var><br>
+ &mdash; Constant: const unsigned short <b>ISO</b><var><a name="index-ISO-330"></a></var><br>
+ <blockquote><p>These constants can be used for the <var>projection</var> argument in
+ <code>Picture::output()</code>, described in
+ <a href="#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>,
+ below. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Namespace-Sorting"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Namespace-Projections">Namespace Projections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Picture-Output-Namespaces">Picture Output Namespaces</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">21.8.1.2 Namespace Sorting</h5>
+ 
+ <p>The namespace <code>Sorting</code> is defined in <samp><span class="file">pictures.web</span></samp>.
+ 
+ <div class="defun">
+ &mdash; Constant: const unsigned short <b>NO_SORT</b><var><a name="index-NO_005fSORT-331"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MAX_Z</b><var><a name="index-MAX_005fZ-332"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MIN_Z</b><var><a name="index-MIN_005fZ-333"></a></var><br>
+ &mdash; Constant: const unsigned short <b>MEAN_Z</b><var><a name="index-MEAN_005fZ-334"></a></var><br>
+ <blockquote><p>These constants can be used for the <var>sort_value</var> argument in
+ <code>Picture::output()</code>, described in
+ <a href="#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>,
+ below. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Picture-Output-Functions"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Output-Namespaces">Picture Output Namespaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Outputting-Pictures">Outputting Pictures</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">21.8.2 Output Functions</h4>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>const Focus&amp; f, </var>[<var>const unsigned short projection = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1, </var>[<var>const unsigned short sort_value = </var><code>Sorting::MAX_Z</code><var>, </var>[<var>const bool do_warnings = </var><code>true</code><var>, </var>[<var>const real min_x_proj = -40, </var>[<var>const real max_x_proj = 40, </var>[<var>const real min_y_proj = -40, </var>[<var>const real max_y_proj = 40, </var>[<var>const real min_z_proj = -40, </var>[<var>const real max_z_proj = 40</var>]]]]]]]]]])<var><a name="index-output-335"></a></var><br>
+ &mdash; Function: void <b>output</b> ([<var>const unsigned short projection = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1, </var>[<var>const unsigned short sort_value = </var><code>Sorting::MAX_Z</code><var>, </var>[<var>const bool do_warnings = </var><code>true</code><var>, </var>[<var>const real min_x_proj = -40, </var>[<var>const real max_x_proj = 40, </var>[<var>const real min_y_proj = -40, </var>[<var>const real max_y_proj = 40, </var>[<var>const real min_z_proj = -40, </var>[<var>const real max_z_proj = 40</var>]]]]]]]]]])<var><a name="index-output-336"></a></var><br>
+ <blockquote><p>These functions create a two-dimensional projection of the objects on the
+ <code>Picture</code> and write MetaPost code to <code>out_stream</code> for
+ drawing it.
+ 
+         <p>The arguments:
+ 
+           <dl>
+ <dt><code>const Focus&amp;</code> <var>f</var><dd>The <code>Focus</code> used for projection, also known as the center of
+ projection, or the camera. 
+ This argument is used in the first version only. 
+ The second version, without a <code>const Focus&amp;</code> <var>f</var> argument,
+ merely calls the first version and passes it the global variable
+ <code>default_focus</code> as its first argument, so <code>default_focus</code> is
+ effectively the default for <var>f</var>.  Defining two versions in this way makes it
+ possible to call
+ <code>output()</code> with <code>projection</code> as its first (and possibly only)
+ argument.  If instead, <var>f</var> were an optional argument with
+ <code>default_focus</code> as its default, this wouldn't have been possible.  It
+ also wouldn't be possible to have <var>f</var> have a default in the first
+ version, and to retain the second version, because the compiler wouldn't
+ be able to resolve a call to <code>output()</code> with no arguments.
+ 
+           <br><dt><code>const unsigned short</code> <var>projection</var><dd>Default: <code>Projections::PERSP</code>. 
+ The type of projection.  Valid values are <code>const unsigned shorts</code>
+ defined in <code>namespace Projections</code>
+ (see <a href="#Namespace-Projections">Namespace Projections</a>):<br>
+ <code>PERSP</code> for the perspective projection,<br>
+ <code>PARALLEL_X_Y</code> for parallel projection onto the x-y plane,<br>
+ <code>PARALLEL_X_Z</code> for parallel projection onto the x-z plane, and<br>
+ <code>PARALLEL_Z_Y</code> for parallel projection onto the z-y plane. 
+ %% !! TO DO:
+ I plan to add isometric and axionometric projections soon.
+ 
+           <br><dt><code>real</code> <var>factor</var><dd>Default: 1. 
+ Passed from <code>output()</code> to
+ <code>extract()</code> and from there to <code>project()</code>.  The
+ <code>world_coordinates</code> of the <code>Points</code> that are projected are
+ multiplied by <var>factor</var>, which enlarges or shrinks the projected
+ image without altering the <code>Picture</code> itself.  <var>factor</var>
+ is probably most useful for parallel projections, where the <code>Focus</code>
+ <var>f</var> isn't used;  with a perspective projection, the parameters of
+ the <code>Focus</code> can be used to influence the size of the projected
+ image.
+ 
+           <br><dt><code>const unsigned short</code> <var>sort_value</var><dd>Default: <code>Sorting::MAX_Z</code>. 
+ The value used should be one of the constants defined in
+ <code>namespace Sorting</code>, See <a href="#Namespace-Sorting">Namespace Sorting</a>, above. 
+ If <code>MAX_Z</code> (the default) is used, the <code>Shapes</code> on the
+ <code>Picture</code> are sorted according to the maximum z-value of the
+ <code>projective_extremes</code> of the <code>Points</code> belonging to the
+ <code>Shape</code>.  If <code>MIN_Z</code> is used,
+ they are sorted according to the minimum z-value, and
+ if <code>MEAN_Z</code> is used, they are sorted according to the  mean of
+ the maximum and minimum z-values.  If <code>NO_SORT</code> is used, the
+ <code>Shapes</code> are output in the order in which they were put onto the
+ <code>Picture</code>.
+ 
+           <p>The surface hiding algorithm
+ implemented in 3DLDF is quite primitive, and doesn't always work right. 
+ For <code>Shapes</code> that intersect, it <em>can't</em> work right. 
+ <!-- !! TO DO: -->
+ I plan to work on improving the surface hiding algorithm soon.  This is
+ not a trivial problem.  To solve it properly, each <code>Shape</code> on a
+ <code>Picture</code> must be tested for intersection with every other
+ <code>Shape</code> on the <code>Picture</code>.  If two or more <code>Shapes</code> intersect,
+ they must be broken up into smaller objects until there are no more
+ intersections.  I don't expect to have a proper solution soon, but I
+ expect that I will be able to make some improvements. 
+ See <a href="#Surface-Hiding">Surface Hiding</a>.
+ 
+           <br><dt><code>const bool</code> <var>do_warnings</var><dd>Default: <code>true</code>.  If <code>true</code>, <code>output()</code> issues warnings
+ to <code>stderr</code> (standard error output) if a <code>Shape</code> cannot be
+ output because it lies
+ outside the limits set by the following arguments.  Sometimes, a user
+ may only want to project a portion of a <code>Picture</code>, in which case
+ such warnings would not be helpful.  In this case, <var>do_warnings</var>
+ should be <code>false</code>.
+ 
+           <br><dt><code>const real</code> <var>min_x_proj</var><dd>Default: -40.  The minimum x-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[0]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_x_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_x_proj</var><dd>Default: 40. 
+ The maximum x-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[0]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_x_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>min_y_proj</var><dd>Default: -40. 
+ The minimum y-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[1]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_y_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_y_proj</var><dd>Default: 40. 
+ The maximum y-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[1]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_y_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>min_z_proj</var><dd>Default: -40. 
+ The minimum z-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[2]</code> of any <code>Point</code> on a
+ <code>Shape</code> is less than <var>min_z_proj</var>, the <code>Shape</code> will not be
+ projected at all.
+ 
+           <br><dt><code>const real</code> <var>max_z_proj</var><dd>Default: 40. 
+ The maximum z-coordinate of the projection of a
+ <code>Shape</code> such that the <code>Shape</code> can be output. 
+ If <code>projective_coordinates[2]</code> of any <code>Point</code> on a
+ <code>Shape</code> is greater than <var>max_z_proj</var>, the <code>Shape</code> will not be
+ projected at all. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>suppress_labels</b> (<var>void</var>)<var><a name="index-suppress_005flabels-337"></a></var><br>
+ <blockquote><p>Suppresses output of the <code>Labels</code> on a <code>Picture</code> when
+ <code>output()</code> is called.  This can be useful when a <code>Picture</code> is
+ output, transformed, and output again, one or more times, in a single figure. 
+ Usually, it will not be desirable to have the <code>Labels</code> output more
+ than once.
+ 
+         <p>In [next figure]
+ , <code>current_picture</code> is output three times, but the
+ <code>Labels</code> on it are only output once.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5);
+           e.label();
+           e.draw();
+           Point pt0(-3);
+           Point pt1(3);
+           pt0.draw(pt1);
+           Point pt2(0, 0, -4);
+           Point pt3(0, 0, 4);
+           pt2.draw(pt3);
+           pt0.dotlabel("0", "lft");
+           pt1.dotlabel("1", "rt");
+           pt2.dotlabel("2", "bot");
+           pt3.dotlabel("3");
+           current_picture.output(Projections::PARALLEL_X_Z);
+           current_picture.rotate(0, 60);
+           current_picture.suppress_labels();
+           current_picture.output(Projections::PARALLEL_X_Z);
+           current_picture.rotate(0, 60);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF79.png"
+ alt="[Figure 79. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 79. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: void <b>unsuppress_labels</b> (<var>void</var>)<var><a name="index-unsuppress_005flabels-338"></a></var><br>
+ <blockquote><p>Sets <code>do_labels</code> to <code>true</code>.  If a <code>Picture</code> contains
+ <code>Labels</code>, <code>unsuppress_labels()</code> ensures that they will be
+ output, when <code>Picture::output()</code> is called, so long as there is no
+ intervening call to <code>suppress_labels()</code> or <code>kill_labels()</code>. 
+ </p></blockquote></div>
+ 
+ <!-- point.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Point-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Focus-Reference">Focus Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Picture-Reference">Picture Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">22 Point Reference</h2>
+ 
+ <p><a name="index-Point-339"></a>Class <code>Point</code> is defined in <samp><span class="file">points.web</span></samp>. 
+ It is derived from <code>Shape</code> using <code>protected</code> derivation. 
+ The function
+ <code>Transform Transform::align_with_axis(Point, Point, char)</code>
+ is a <code>friend</code> of <code>Point</code>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Point-Data-Members">Point Data Members</a>
+ <li><a accesskey="2" href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>
+ <li><a accesskey="3" href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>
+ <li><a accesskey="4" href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>
+ <li><a accesskey="5" href="#Point-Destructor">Point Destructor</a>
+ <li><a accesskey="6" href="#Point-Operators">Point Operators</a>
+ <li><a accesskey="7" href="#Copying-Points">Copying Points</a>
+ <li><a accesskey="8" href="#Querying-Points">Querying Points</a>
+ <li><a accesskey="9" href="#Returning-Coordinates">Returning Coordinates</a>
+ <li><a href="#Returning-Information-for-Points">Returning Information for Points</a>
+ <li><a href="#Modifying-Points">Modifying Points</a>
+ <li><a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a>
+ <li><a href="#Applying-Transformations-to-Points">Applying Transformations to Points</a>
+ <li><a href="#Projecting-Points">Projecting Points</a>
+ <li><a href="#Vector-Operations">Vector Operations</a>
+ <li><a href="#Points-and-Lines">Points and Lines</a>
+ <li><a href="#Point-Intersections">Point Intersections</a>
+ <li><a href="#Point-Drawing-Functions">Point Drawing Functions</a>
+ <li><a href="#Labelling-Points">Labelling Points</a>
+ <li><a href="#Showing-Points">Showing Points</a>
+ <li><a href="#Outputting-Points">Outputting Points</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Point-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Reference">Point Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>world_coordinates</b><var><a name="index-world_005fcoordinates-340"></a></var><br>
+ <blockquote><p>The set of four homogeneous coordinates x, y, z, and w that represent
+ the position of the <code>Point</code> within 3DLDF's global coordinate
+ system. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>projective_coordinates</b><var><a name="index-projective_005fcoordinates-341"></a></var><br>
+ <blockquote><p>The set of four homogeneous coordinates x, y, z, and w that represent
+ the position of the <em>projection</em> of the <code>Point</code> onto a
+ two-dimensional plane for output.  The x and y values are used in the
+ MetaPost code written to <code>out_stream</code>.  The z value is used
+ in the hidden surface algorithm (which is currently rather primitive and
+ doesn't work very well.  see <a href="#Surface-Hiding">Surface Hiding</a>).  The w value can be
+ != 1
+ ,
+ depending on the projection used;  the perspective projection is
+ non-affine, so w can take on other values. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>user_coordinates</b><var><a name="index-user_005fcoordinates-342"></a></var><br>
+ <blockquote><p>A set of four homogeneous coordinates x, y, z, and w.
+ 
+         <p><code>user_coordinates</code> currently has no function. 
+ It is intended for use in user-defined coordinate systems.  For example,
+ a coordinate system could be defined with respect to a plane surface
+ that isn't parallel to one of the major planes.  Such a coordinate
+ system would be convenient for drawing on the plane.  A <code>Transform</code>
+ would make it possible to convert between <code>user_coordinates</code> and
+ <code>world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: valarray&lt;real&gt; <b>view_coordinates</b><var><a name="index-view_005fcoordinates-343"></a></var><br>
+ <blockquote><p>A set of four homogeneous coordinates x, y, z, and w.
+ 
+         <p><code>view_coordinates</code> currently has no function.  It may be useful for
+ displaying multiple views in an interactive graphical user interface, or
+ for some other purpose. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-344"></a></var><br>
+ <blockquote><p>Contains the product of the transformations applied to the <code>Point</code>. 
+ When <code>apply_transform()</code> is called for the <code>Point</code>, directly
+ or indirectly, the <code>world_coordinates</code> are updated and
+ <code>transform</code> is reset to the identity <code>Transform</code>. 
+ See <a href="#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-345"></a></var><br>
+ <blockquote><p>Returns <code>on_free_store</code>.  This should only be <code>true</code> if
+ the <code>Point</code> was dynamically allocated on the
+ free store.  <code>Points</code> should only ever be dynamically
+ allocated by <code>create_new&lt;Point&gt;()</code>, which
+ uses <code>set_on_free_store()</code> to set <code>on_free_store</code>
+ to <code>true</code>. 
+ See <a href="#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>, and
+ <a href="#Modifying-Points">Point Reference; Modifying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: signed short <b>drawdot_value</b><var><a name="index-drawdot_005fvalue-346"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what MetaPost drawing command
+ (<code>drawdot()</code> or <code>undrawdot()</code>) to write to <code>out_stream</code>
+ when outputting a <code>Point</code>.
+ 
+         <p>When <code>drawdot()</code> or <code>undrawdot()</code> is called on a <code>Point</code>,
+ the <code>Point</code> is copied and put onto the <code>Picture</code>, which was
+ passed to
+ <code>drawdot()</code> or <code>undrawdot()</code> as an argument
+ (<code>current_picture</code> by
+ default).  <code>drawdot_value</code> is either set to <code>Shape::DRAWDOT</code>
+ or <code>Shape::UNDRAWDOT</code> on the copy; <code>this-&gt;drawdot</code> is
+ not set. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: const Color* <b>drawdot_color</b><var><a name="index-drawdot_005fcolor-347"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what string to write to <code>out_stream</code>
+ for the color when outputting a <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: string <b>pen</b><var><a name="index-pen-348"></a></var><br>
+ <blockquote><p>Used to tell <code>Point::output()</code> what string to write to <code>out_stream</code>
+ for the pen when outputting a <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-349"></a></var><br>
+ <blockquote><p>A set of 6 <code>real</code> values indicating the maximum and minumum x, y,
+ and
+ z-coordinates of the <code>Point</code>. 
+ Used for determining whether a <code>Point</code> is projectable with the
+ parameters of a particular invocation of <code>Picture::output()</code>. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>.
+ 
+         <p>Obviously, the maxima and minima
+ will always be the same for a <code>Point</code>, namely the x, y, and
+ z-coordinates. 
+ However, <code>set_extremes()</code> and <code>get_extremes()</code>,
+ the functions that access <code>projective_extremes</code>, are pure virtual
+ functions in <code>class Shape</code>,
+ so the <code>Point</code> versions must be consistent with the versions for
+ other types derived from <code>Shape</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-350"></a></var><br>
+ <blockquote><p><code>true</code> by default.  Set to <code>false</code> by <code>suppress_output()</code>,
+ which is called on a <code>Shape</code> by <code>Picture::output()</code>, if the
+ <code>Shape</code> is not projectable. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: string <b>measurement_units</b><var><a name="index-measurement_005funits-351"></a></var><br>
+ <blockquote><p>The unit of measurement for all distances within a <code>Picture</code>,
+ <code>"cm"</code> (for centimeters) by default.  The x and y-coordinates of
+ the  projected <code>Points</code> are always followed by <code>measurement_units</code>
+ when they're written to <code>out_stream</code>.  Unlike Metafont, units of
+ measurement cannot be indicated for individual coordinates.  Nor can
+ <code>measurement_unit</code> be changed within a <code>Picture</code>.
+ 
+         <p>When I write an input routine, I plan to make it behave the way Metafont
+ does, however, 3DLDF will probably also convert all of the input values
+ to a standard unit, as Metafont does. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: real <b>CURR_Y</b><var><a name="index-CURR_005fY-352"></a></var><br>
+ &mdash; Public static variable: real <b>CURR_Z</b><var><a name="index-CURR_005fZ-353"></a></var><br>
+ <blockquote><p>Default values for the y and z-coordinate of <code>Points</code>, when the
+ x-coordinate, or the x and y-coordinates only are specified. 
+ Both are 0 by default.
+ 
+         <p>These values only used in the constructor and setting function taking
+ one required <code>real</code> value (for the x-coordinate), and two optional
+ <code>real</code> values (for the y and z-coordinates).  They are not used
+ when a <code>Point</code> is declared using the
+ default constructor with no arguments.  In this case, the x, y, and
+ z-coordinates will all be 0. 
+ See <a href="#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          Point A(1);
+           A.show("A:");
+           -| A: (1, 0, 0);
+           CURR_Y = 5;
+           A.set(2);
+           A.show("A:");
+           -| A: (2, 5, 0);
+           CURR_Z = 12;
+           Point B(3);
+           B.show("B:");
+           -| B: (3, 5, 12);
+           Point C;
+           C.show("C:");
+           -| C: (0, 0, 0);
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Typedefs-and-Utility-Structures"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Data-Members">Point Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.2 Typedefs and Utility Structures</h3>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>point_pair</b><var> first second<a name="index-point_005fpair-354"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair&lt;Point, Point&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_point</b><var> b pt<a name="index-bool_005fpoint-355"></a></var><br>
+ <blockquote><p><code>b</code> is a <code>bool</code> and <code>pt</code> is a <code>Point</code>. 
+ <code>bool_point</code> also contains two constructors and an assignment
+ operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point</b> (<var>void</var>)<var><a name="index-bool_005fpoint-356"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point</code> and sets <code>b</code> to <code>false</code> and
+ <code>pt</code> to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point</b> (<var>bool bb, const Point&amp; ppt</var>)<var><a name="index-bool_005fpoint-357"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point</code> and sets <code>b</code> to <var>bb</var> and <code>pt</code>
+ to <var>ppt</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_point::operator=</b> (<var>const bool_point&amp; bp</var>)<var><a name="index-bool_005fpoint_003a_003aoperator_003d-358"></a></var><br>
+ <blockquote><p>Sets <code>b</code> to
+ <var>bp</var>.<code>b</code> and <code>pt</code> to <var>bp</var>.<code>pt</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; typedef: <b>bool_point_pair</b><var> first second<a name="index-bool_005fpoint_005fpair-359"></a></var><br>
+ <blockquote><p>Synonymous with <code>pair &lt;bool_point, bool_point&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_point_quadruple</b><var> first second third fourth<a name="index-bool_005fpoint_005fquadruple-360"></a></var><br>
+ <blockquote><p>This structure contains four <code>bool_points</code>.  It also has two
+ constructors and an assignment operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_point_quadruple</b> (<var>void</var>)<var><a name="index-bool_005fpoint_005fquadruple-361"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point_quadruple</code>, and sets
+ <code>first</code>, <code>second</code>, <code>third</code>, and <code>fourth</code> all to
+ <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>bool_point_quadruple</b> (<var>bool_point a, bool_point b, bool_point c, bool_point d</var>)<var><a name="index-bool_005fpoint_005fquadruple-362"></a></var><br>
+ <blockquote><p>Creates a <code>bool_point_quadruple</code> and sets
+ <code>first</code> to <var>a</var>, <code>second</code> to <var>b</var>, <code>third</code> to
+ <var>c</var>, and <code>fourth</code> to <var>d</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_point_quadruple::operator=</b> (<var>const bool_point_quadruple&amp; arg</var>)<var><a name="index-bool_005fpoint_005fquadruple_003a_003aoperator_003d-363"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>arg</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; struct: <b>bool_real_point</b><var> b r pt<a name="index-bool_005freal_005fpoint-364"></a></var><br>
+ <blockquote><p><code>b</code> is a <code>bool</code>, <code>r</code> is a <code>real</code>, and <code>pt</code> is a
+ <code>Point</code>.  <code>bool_real_point</code> also contains three constructors
+ and an assignment operator, described below. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>bool_real_point</b> (<var>void</var>)<var><a name="index-bool_005freal_005fpoint-365"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <code>false</code>,
+ <code>r</code> to <code>INVALID_REAL</code> and  <code>pt</code> to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>bool_real_point</b> (<var>const bool_real_point&amp; brp</var>)<var><a name="index-bool_005freal_005fpoint-366"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <var>brp</var>.<code>b</code>,
+ <code>r</code> to <var>brp</var>.<code>r</code>, and  <code>pt</code> to <var>brp</var>.<code>pt</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>bool_real_point</b> (<var>const bool&amp; bb, const real&amp; rr, const Point&amp; ppt</var>)<var><a name="index-bool_005freal_005fpoint-367"></a></var><br>
+ <blockquote><p>Creates a <code>bool_real_point</code> and sets <code>b</code> to <var>bb</var>,
+ <code>r</code> to <var>rr</var>, and  <code>pt</code> to <var>ppt</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>bool_real_point::operator=</b> (<var>const bool_real_point&amp; brp</var>)<var><a name="index-bool_005freal_005fpoint_003a_003aoperator_003d-368"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>brp</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Global-Constants-and-Variables"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.3 Global Constants and Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: Point <b>INVALID_POINT</b><var><a name="index-INVALID_005fPOINT-369"></a></var><br>
+ <blockquote><p>The x, y, and z-values in <code>world_coordinates</code> are all <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: Point <b>origin</b><var><a name="index-origin-370"></a></var><br>
+ <blockquote><p>The x, y, and z-values in <code>world_coordinates</code> are all 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point <b>INVALID_BOOL_POINT</b><var><a name="index-INVALID_005fBOOL_005fPOINT-371"></a></var><br>
+ <blockquote><p><code>b</code> is <code>false</code> and <code>pt</code> is <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point_pair <b>INVALID_BOOL_POINT_PAIR</b><var><a name="index-INVALID_005fBOOL_005fPOINT_005fPAIR-372"></a></var><br>
+ <blockquote><p><code>first</code> and <code>second</code> are both <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_real_point <b>INVALID_BOOL_REAL_POINT</b><var><a name="index-INVALID_005fBOOL_005fREAL_005fPOINT-373"></a></var><br>
+ <blockquote><p><code>b</code> is <code>false</code>, <code>r</code> is <code>INVALID_REAL</code>, and <code>pt</code>
+ is <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constant: bool_point_quadruple <b>INVALID_BOOL_POINT_QUADRUPLE</b><var><a name="index-INVALID_005fBOOL_005fPOINT_005fQUADRUPLE-374"></a></var><br>
+ <blockquote><p><code>first</code>, <code>second</code>, <code>third</code>, and <code>fourth</code> are all
+ <code>INVALID_BOOL_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Destructor">Point Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.4 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Point</b> (<var>void</var>)<var><a name="index-Point-375"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and initializes its x, y, and z-coordinates
+ to 0. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Point</b> (<var>const real x, </var>[<var>const real y = </var><code>CURR_Y</code><var>, </var>[<var>const real z = </var><code>CURR_Z</code>]])<var><a name="index-Point-376"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and initializes its x, y, and z-coordinates
+ to the values of the arguments <var>x</var>, <var>y</var>, and <var>z</var>.  The
+ arguments <var>y</var> and <var>z</var> are optional.  If they are not specified,
+ the values of <code>CURR_Y</code> and <code>CURR_Z</code> are used.  They are 0 by
+ default, but can be changed by the user.  This can be convenient, if all
+ of the <code>Points</code> being drawn in a particular section of a program
+ have the same z or y and z values. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real x, </var>[<var>const real y = </var><code>CURR_Y</code><var>, </var>[<var>const real z = </var><code>CURR_Z</code>]])<var><a name="index-set-377"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above, but is used for resetting the coordinates of an existing
+ <code>Point</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Point</b> (<var>const Point&amp; p</var>)<var><a name="index-Point-378"></a></var><br>
+ <blockquote><p>Creates a <code>Point</code> and copies the values for its x, y, and z-coordinates
+ from <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p</var>)<var><a name="index-set-379"></a></var><br>
+ <blockquote><p>Corresponds to the copy constructor above, but is used for resetting the coordinates
+ of an existing <code>Point</code>.  This function exists purely as a convenience;
+ the operator <code>operator=()</code>
+ (see <a href="#Point-Operators">Point Reference; Operators</a>)
+ performs exactly the
+ same function. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Point* <b>create_new&lt;Point&gt;</b> (<var>const Point* p</var>)<var><a name="index-create_005fnew_003cPoint_003e-380"></a></var><br>
+ &mdash; : Point* <b>create_new&lt;Point&gt;</b> (<var>const Point&amp; p</var>)<var><a name="index-create_005fnew_003cPoint_003e-381"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Points</code>. 
+ They create a <code>Point</code> on the free store and allocate memory for it using
+ <code>new(Point)</code>.  They return a pointer to the new <code>Point</code>.
+ 
+         <p>If <var>p</var> is a non-zero pointer or a reference,
+ the new <code>Point</code> will be a copy of
+ <var>p</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Point&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+         <p>One use for <code>create_new&lt;Point&gt;</code> is in the constructors for
+ <code>classes</code> of
+ objects that can contain a variable number of <code>Points</code>, such as
+ <code>Path</code> and <code>Polygon</code>.  Another use is in the drawing and
+ filling functions, where objects are copied and the copies put onto a
+ <code>Picture</code>.
+ 
+         <p>Programmers who dynamically allocate <code>Points</code> must ensure that they
+ are deallocated properly using <code>delete</code>! 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Destructor"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Operators">Point Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.5 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Point</b> (<code>void</code>)<var><a name="index-g_t_007ePoint-382"></a></var><br>
+ <blockquote><p>This function currently has an empty definition, but its existence
+ prevents GCC 3.3 from issuing the following warning:
+ &ldquo;`class Point' has virtual functions but non-virtual destructor&rdquo;. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Copying-Points">Copying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Destructor">Point Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.6 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_003d-383"></a></var><br>
+ <blockquote><p>Makes <code>*this</code> a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-384"></a></var><br>
+ <blockquote><p>Multiplies <code>transform</code> by <var>t</var>. 
+ By multiplying a <code>Point</code> successively by
+ one or more <code>Transforms</code>, the effect of the transformations is
+ &ldquo;saved up&rdquo; in <code>transform</code>.  Only when an operation that needs
+ updated values for the <code>world_coordinates</code> is called on a
+ <code>Point</code>, or the <code>Point</code> is passed as an argument to such an
+ operation, is the transformation stored in <code>transform</code> applied to
+ <code>world_coordinates</code> by <code>apply_transform()</code>,
+ which subsequently, resets <code>transform</code> to
+ the identity <code>Transform</code>. 
+ See <a href="#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator+</b> (<var>Point p</var>)<var><a name="index-operator_002b-385"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with <code>world_coordinates</code> that are the sums of
+ the corresponding <code>world_coordinates</code> of <code>*this</code> and <var>p</var>,
+ after they've been updated. 
+ <code>*this</code> remains unchanged; as in many other functions with
+ <code>Point</code> arguments, <var>p</var> is passed by value, because
+ <code>apply_transform()</code> must be called on it, in order to update its
+ <code>world_coordinates</code>.  If <var>p</var> were a <code>const Point&amp;</code>, it
+ would have to copied within the function anyway, because
+ <code>apply_transform()</code> is a non-<code>const</code> operation.
+ 
+      <pre class="example">          Point p0(-2, -6, -28);
+           Point p1(3, 14, 92);
+           Point p2(p0 + p1);
+           p2.show("p2:");
+           -| p2: (1, 8, 64)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator+=</b> (<var>Point p</var>)<var><a name="index-operator_002b_003d-386"></a></var><br>
+ <blockquote><p>Adds the updated <code>world_coordinates</code> of <var>p</var> to those of
+ <code>*this</code>. 
+ Equivalent in effect to <code>shift(</code><var>p</var><code>)</code>
+ In fact, this
+ function merely calls <code>p.apply_transform()</code> and
+ <code>Point::shift(real, real, real)</code> with <var>p</var>'s x, y, and z
+ coordinates (from <code>world_coordinates</code>) as its arguments. 
+ See <a href="#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator-</b> (<var>Point p</var>)<var><a name="index-operator_002d-387"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with <code>world_coordinates</code> representing the
+ difference between the updated values of
+ <code>this-&gt;world_coordinates</code><!-- /@w --> and
+ <var>p</var><code>.world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator-=</b> (<var>Point p</var>)<var><a name="index-operator_002d_003d-388"></a></var><br>
+ <blockquote><p>Subtracts the updated values of <var>p</var><code>.world_coordinates</code> from
+ those of <code>this-&gt;world_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: real <b>operator*=</b> (<var>const real r</var>)<var><a name="index-operator_002a_003d-389"></a></var><br>
+ <blockquote><p>Multiplies the updated x, y, and z coordinates (<code>world_coordinates</code>) of
+ the <code>Point</code> by <var>r</var> and returns <var>r</var>.  This makes it possible to
+ chain invocations of this function.
+ 
+         <p>If <code>P</code> is a <code>Point</code> then
+ <code>P *= </code><var>r</var> is
+ equivalent in its effect to <code>P.scale(</code><var>r</var><code>, </code><var>r</var><code>, </code><var>r</var><code>)</code>,
+ except that
+ <code>P.world_coordinates</code> is modified directly and immediately,
+ without changing <code>P.transform</code>.  This is possible, because this
+ function calls <code>apply_transform()</code> to update the
+ <code>world_coordinates</code> before multiplying them <code>r</code>, so
+ <code>transform</code> is the identity <code>Transform</code>.
+ 
+      <pre class="example">          Point P(1, 2, 3);
+           P *= 7;
+           P.show("P:");
+           -| P: (7, 14, 21);
+           Point Q(1.5, 2.7, 13.82);
+           Q *= P *= -1.28;
+           P.show("P:");
+           -| P: (-8.96, -17.92, -26.88)
+           Q.show("Q:");
+           -| Q: (-1.92, -3.456, -17.6896)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator*</b> (<var>const real r</var>)<var><a name="index-operator_002a-390"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with x, y, and z coordinates
+ (<code>world_coordinates</code>) equal to the updated x, y, and z coordinates
+ of <code>*this</code> multiplied by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member operator: Point <b>operator*</b> (<var>const real r, const Point&amp; p</var>)<var><a name="index-operator_002a-391"></a></var><br>
+ <blockquote><p>Equivalent to <code>Point::operator*(const real </code><var>r</var><code>)</code> (see above),
+ but with <var>r</var> placed first.
+      <pre class="example">          Point p0(10, 11, 12);
+           real r = 2.5;
+           Point p1 = r * p0;
+           p1.show();
+           -|Point:
+           -|(25, 27.5, 30)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator-</b> (<var>void</var>)<var><a name="index-operator_002d-392"></a></var><br>
+ <blockquote><p>Unary minus (prefix).  Returns a <code>Point</code> with x, y, and z
+ coordinates (<code>world_coordinates</code>) equal to the
+ the x, y, and z-coordinates (<code>world_coordinates</code>) of
+ <code>*this</code> multiplied by -1. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: void <b>operator/=</b> (<var>const real r</var>)<var><a name="index-operator_002f_003d-393"></a></var><br>
+ <blockquote><p>Divides the updated x, y, and z coordinates (<code>world_coordinates</code>) of
+ the <code>Point</code> by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: Point <b>operator/</b> (<var>const real r</var>)<var><a name="index-operator_002f-394"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> with x, y, and z coordinates
+ (<code>world_coordinates</code>) equal to the updated x, y, and z coordinates
+ of <code>*this</code>
+ divided by <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Operator: bool <b>operator==</b> (<var>Point p</var>)<var><a name="index-operator_003d_003d-395"></a></var><br>
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_003d_003d-396"></a></var><br>
+ <blockquote><p>Equality comparison for <code>Points</code>.  These functions return
+ <code>true</code> if the updated values of the <code>world_coordinates</code> of the two
+ <code>Points</code> differ by less than the value returned by
+ <code>Point::epsilon()</code>, otherwise <code>false</code>. 
+ See <a href="#Returning-Information-for-Points">Point Reference; Returning Information</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Point&amp; p</var>)<var><a name="index-operator_0021_003d-397"></a></var><br>
+ <blockquote><p>Inequality comparison for <code>Points</code>.  Returns <code>false</code> if
+ <code>*this == </code><var>p</var>, otherwise <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Copying-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Points">Querying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Operators">Point Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.7 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-398"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Point</code>, and allocates memory for it on the
+ free store using <code>create_new&lt;Point&gt;()</code>. 
+ It returns a pointer to <code>Shape</code> that points to the new <code>Point</code>. 
+ This function is used in the drawing commands for putting <code>Points</code>
+ onto <code>Pictures</code>. 
+ See <a href="#Point-Drawing-Functions">Point Reference; Drawing</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Coordinates">Returning Coordinates</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Copying-Points">Copying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.8 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>inline</code> function: bool <b>is_identity</b> (<var>void</var>)<var><a name="index-is_005fidentity-399"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if <code>transform</code> is the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Transform <b>get_transform</b> (<var>void</var>)<var><a name="index-get_005ftransform-400"></a></var><br>
+ <blockquote><p>Returns <code>transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-401"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if memory for the <code>Point</code> has been dynamically
+ allocated on the
+ free store, i.e., if the <code>Point</code> has been created using
+ <code>create_new&lt;Point&gt;()</code>. 
+ See <a href="#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_plane</b> (<var>const Plane&amp; p</var>)<var><a name="index-is_005fon_005fplane-402"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Point</code> lies on the
+ <code>Plane</code> <var>p</var>, otherwise <code>false</code>.
+ 
+         <p>Planes are conceived of as having infinite extension, so while
+ the <code>Point</code> C in [next figure]
+  does not lie within
+ the <code>Rectangle</code> r, it does lie on q, so
+ <code>C.is_on_plane(q)</code> returns
+ <code>true</code>.<a rel="footnote" href="#fn-33" name="fnd-33"><sup>33</sup></a>
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 20, 45, 35);
+           Plane q = r.get_plane();
+           Point A(2, 0, 2);
+           Point B(2, 1.64143, 2);
+           Point C(0.355028, 2.2185, 6.48628);
+           cout &lt;&lt; A.is_on_plane(q);
+           -| 0
+           cout &lt;&lt; B.is_on_plane(q);
+           -| 1
+           cout &lt;&lt; "C.is_on_plane(q)";
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF80.png"
+ alt="[Figure 80. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 80. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_in_triangle</b> (<var>const Point&amp; p0, const Point&amp; p1, const Point&amp; p2, </var>[<var>bool verbose = </var><code>false</code><var>, </var>[<var>bool test_points = </var><code>true</code>]])<var><a name="index-is_005fin_005ftriangle-403"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if <code>*this</code> lies within the triangle determined by
+ the three <code>Point</code> arguments, otherwise <code>false</code>.
+ 
+         <p>If the code calling <code>is_in_triangle()</code> has ensured that
+ p_0, p_1, and p_2 determine a plane, i.e., that they are not
+ colinear, and that <code>*this</code> lies in that plane, then
+ <code>false</code> can be passed to <code>is_in_triangle()</code> as its
+ <var>test_points</var> argument.
+ 
+         <p>If the <var>verbose</var> argument is <code>true</code>, information resulting from
+ the execution of the function are printed to standard output or standard
+ error.
+ 
+         <p>This function is needed for determining whether a line intersects with a
+ polygon. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Coordinates"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Information-for-Points">Returning Information for Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Points">Querying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.9 Returning Coordinates</h3>
+ 
+ <p>The functions in this section return either a single coordinate or a set of
+ coordinates.  Each has
+ a <code>const</code> and a non-<code>const</code> version.
+ 
+    <p>The arguments are the same, with one exception:
+ 
+      <dl>
+ <dt><code>char</code><var> c</var><dd>Only in <code>get_coord()</code>.  Indicates which coordinate should be
+ returned.  Valid values are <code>'x'</code>, <code>'X'</code>, <code>'y'</code>,
+ <code>'Y'</code>, <code>'z'</code>, <code>'Z'</code>, <code>'w'</code>, and <code>'W'</code>.
+ 
+      <br><dt><code>char </code><var>coords</var><dd>Indicates the set of coordinates which should be returned or from which
+ the coordinate to be returned should be chosen from.  Valid values are
+ <code>'w'</code> for <code>world_coordinates</code> (the default), <code>'p'</code> for
+ <code>projective_coordinates</code>, <code>'u'</code> for <code>user_coordinates</code>,
+ and <code>'v'</code> for <code>view_coordinates</code>.
+ 
+      <br><dt><code>const bool</code><var> do_persp</var><dd>Only relevant if <code>projective_coordinates</code>, or one of its elements
+ is to be returned.  If <code>true</code>, the
+ default, then <code>project()</code> is called, thereby generating values for
+ <code>projective_coordinates</code>.  If <var>do_persp</var> is <code>false</code>, then
+ <code>projective_coordinates</code>, or one of its elements, is
+ returned unchanged, which may sometimes be useful.
+ 
+      <br><dt><code>const bool</code><var> do_apply</var><dd>If <code>true</code> (the default), <code>apply_transform()</code> is called,
+ thereby updating the <code>world_coordinates</code>.  Otherwise, it's not, so
+ that the values stored in <code>world_coordinates</code> remain unchanged. 
+ Note that if <var>coords</var> is <code>'p'</code> and <var>do_persp</var> is <code>true</code>,
+ <code>apply_transform()</code> will be called in <code>project()</code>
+ whether <code>do_apply</code> is <code>true</code> or <code>false</code>.  If for some
+ reason, one wanted get <code>projective_coordinates</code>, or one of its
+ values, based on the
+ projection of <code>world_coordinates</code> without first updating them, one
+ would have to call <code>reset_transform()</code> before calling one of
+ these functions.  It would probably be a good idea to save <code>transform</code>
+ before doing so.
+ 
+      <br><dt><code>Focus*</code><var> f</var><dd>Indicates what <code>Focus</code> is to be used for projection. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is 0, in which case <var>f</var> points to the global
+ variable <code>default_focus</code>.
+ 
+      <br><dt><code>const unsigned short</code><var> proj</var><dd>Indicates what form of projection is to be used. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is <code>Projections::PERSP</code>, which causes the
+ perspective projection to be applied.
+ 
+      <br><dt><code>real</code><var> factor</var><dd>Passed to <code>project()</code>.  The values of the x and y coordinates in
+ <code>projective_coordinates</code> are multiplied by <var>factor</var>. 
+ Only relevant if <code>coords</code> is <code>'p'</code>, i.e.,
+ <code>projective_coordinates</code>, or one of its elements, is to be
+ returned.  The default is 1. 
+ </dl>
+ 
+ <div class="defun">
+ &mdash; Function: valarray &lt;real&gt; <b>get_all_coords</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fall_005fcoords-404"></a></var><br>
+ <blockquote><p>Returns one of the sets of coordinates;  <code>world_coordinates</code> by
+ default. 
+ Returns a complete set of coordinates:  <code>'w'</code> for <code>world_coordinates</code>,
+ <code>'p'</code> for <code>projective_coordinates</code>, <code>'u'</code> for
+ <code>user_coordinates</code>, or<code>'v'</code> for  <code>view_coordinates</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_coord</b> (<var>char c, </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fcoord-405"></a></var><br>
+ <blockquote><p>Returns one <code>coordinate</code>, x, y, z, or w, from the set of
+ coordinates indicated (or <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_x</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fx-406"></a></var><br>
+ <blockquote><p>Returns the x-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_y</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fy-407"></a></var><br>
+ <blockquote><p>Returns the y-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_z</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fz-408"></a></var><br>
+ <blockquote><p>Returns the z-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_w</b> ([<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]]]]]])<var><a name="index-get_005fw-409"></a></var><br>
+ <blockquote><p>Returns the w-coordinate from the set of coordinates indicated (or
+ <code>world_coordinates</code>, by default). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Information-for-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Points">Modifying Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Coordinates">Returning Coordinates</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.10 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: real <b>epsilon</b> (<var>void</var>)<var><a name="index-epsilon-410"></a></var><br>
+ <blockquote><p>Returns the positive <code>real</code> value of smallest magnitude
+ \epsilon that should be used as a coordinate value in a
+ <code>Point</code>. 
+ A coordinate of a <code>Point</code> may also contain
+ -\epsilon.
+ 
+         <p>The value \epsilon is used for testing the equality of
+ <code>Points</code> in <code>Point::operator==()</code>
+ (see <a href="#Point-Operators">Point Reference; Operators</a>):
+ 
+         <p>Let \epsilon be the value returned by <code>epsilon()</code>,
+ P and Q be
+ <code>Points</code>, and P_x, Q_x, P_y, Q_y,
+ P_z, and Q_z the updated x, y, and z-coordinates of P and Q,
+ respectively. 
+ If and only if
+ ||P_x| - |Q_x|| &lt; \epsilon, ||P_y| - |Q_y|| &lt; \epsilon,
+ and
+ ||P_z| - |Q_z|| &lt; \epsilon, then
+ P = Q.
+ 
+         <p><code>epsilon()</code> returns different values, depending on whether
+ <code>real</code> is <code>float</code> or <code>double</code>:
+ If <code>real</code> is <code>float</code> (the default), <code>epsilon()</code>
+ returns 0.00001. 
+ If <code>real</code> is <code>double</code>, it returns 0.000000001.
+ 
+         <p><b>Please note</b>:  I haven't tested whether 0.000000001 is a good
+ value yet, so users should be aware of this if they set <code>real</code> to
+ <code>double</code>!<a rel="footnote" href="#fn-34" name="fnd-34"><sup>34</sup></a>
+ The way to test this is to start with two <code>Points</code>
+ P and Q at different locations. 
+ Then they should be transformed using different rotations in such a way
+ that they should end up at the same location. 
+ Let \epsilon stand for the value returned by <code>epsilon()</code>,
+ and let x, y, and y stand for
+ the <code>world_coordinates</code> of the <code>Points</code> after
+ <code>apply_transform()</code> has been called on them. 
+ If x_P = x_Q, y_P = y_Q, and
+ z_P = z_Q,
+ \epsilon is a good value.
+ 
+         <p>Rotation causes a significant loss of precision to due to the use of the
+ <code>sin()</code> and <code>cos()</code> functions.  Therefore, neither
+ <code>Point::epsilon()</code> nor <code>Transform::epsilon()</code>
+ (see <a href="#Returning-Information-for-Transforms">Tranform Reference; Returning Information</a>)
+ can be as small as I'd like them to be.  If they are two
+ small, operations that test for equality of <code>Transforms</code> and
+ <code>Points</code> will return <code>false</code> for objects that should be
+ equal. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Points">Affine Transformations for Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Information-for-Points">Returning Information for Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.11 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = true</var>])<var><a name="index-set_005fon_005ffree_005fstore-411"></a></var><br>
+ <blockquote><p>This function is used in the template function
+ <code>create_new()</code>.  It sets <code>on_free_store</code> to <code>true</code>. 
+ See <a href="#Point-Data-Members">Point Reference; Data Members</a>, and
+ <a href="#Point-Constructors-and-Setting-Functions">Point Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-412"></a></var><br>
+ <blockquote><p>Sets all of the coordinates in all of the sets of coordinates (i.e.,
+ <code>world_coordinates</code>, <code>user_coordinates</code>, <code>view_coordinates</code>, and
+ <code>projective_coordinates</code>) to 0 and resets <code>transform</code>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>clean</b> ([<var>int factor = 1</var>])<var><a name="index-clean-413"></a></var><br>
+ <blockquote><p>Calls <code>apply_transform()</code> and sets the values of
+ <code>world_coordinates</code> to 0, whose absolute values are less than
+ <code>epsilon()</code> * <var>factor</var>
+ . 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_transform</b> (<var>void</var>)<var><a name="index-reset_005ftransform-414"></a></var><br>
+ <blockquote><p>Sets <code>Transform</code> to the identity <code>Transform</code>.  Performed in
+ <code>apply_transform()</code>, after the latter updates <code>world_coordinates</code>. 
+ <a href="#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Applying-Transformations-to-Points">Applying Transformations to Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Points">Modifying Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.12 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-415"></a></var><br>
+ &mdash; Function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-416"></a></var><br>
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-417"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::rotate()</code>, and returns its
+ return value, namely, a <code>Transform</code> representing the rotation
+ only.
+ 
+         <p>In the first version, taking three <code>real</code> arguments, the
+ <code>Point</code> is rotated <var>x</var> degrees around the x-axis, <var>y</var>
+ degrees around the y-axis, and <var>z</var> degrees around the z-axis in
+ that order.
+ 
+      <pre class="example">          Point p0(1, 0, 2);
+           p0.rotate(90);
+           p0.show("p0:")
+           -| p0: (1, 2, 0)
+           Point p1(-1, 1, 1);
+           p1.rotate(-90, 90, 90);
+           p1.show("pt1:");
+           -| p1: (1, -1, -1)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF81.png"
+ alt="[Figure 81. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 81. 
+ <br>
+ </p>
+ 
+         <p>Please note that rotations are not commutative operations.  Nor are they
+ commutative with other transformations. 
+ So, if you want to rotate a <code>Point</code> about the x, y and z-axes in
+ that order,
+ you can do so with a single invocation of <code>rotate()</code>, as in
+ the previous example. 
+ However, if you want to rotate a <code>Point</code> first about the
+ y-axis and then about the x-axis, you must invoke <code>rotate()</code> twice.
+ 
+      <pre class="example">          Point pt0(1, 1, 1);
+           pt0.rotate(0, 45);
+           pt0.rotate(45);
+           pt0.show("pt0:");
+           -| pt0: (0, 1.70711, 0.292893)
+ </pre>
+         <p>In the version taking two <code>Point</code> arguments <var>p0</var> and <var>p1</var>,
+ and a <code>real</code> argument <var>angle</var>, the <code>Point</code> is rotated
+ <code>angle</code> degrees around the axis determined
+ by <var>p0</var> and <var>p1</var>, 180 degrees
+  by default.
+ 
+      <pre class="example">          Point P(2, 0, 0);
+           Point A;
+           Point B(2, 2, 2);
+           P.rotate(A, B, 180);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF82.png"
+ alt="[Figure 82. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 82. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-418"></a></var><br>
+ <blockquote><p>Calls <code>transform.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code> and returns its
+ return value, namely, a <code>Transform</code> representing the scaling operation
+ only.
+ 
+         <p>Scaling causes the x-coordinate of the <code>Point</code> to be multiplied by
+ <var>x</var>, the y-coordinate of the <code>Point</code> to be multiplied by
+ <var>y</var>, and the z-coordinate of the <code>Point</code> to be multiplied by
+ <var>z</var>.
+ 
+      <pre class="example">          Point p0(1, 0, 3);
+           p0.scale(4);
+           p0.show("p0:");
+           -| p0: (4, 0, 3)
+           Point p1(-2, -1, -2);
+           p1.scale(-2, -3, -4);
+           p1.show("p1:");
+           -| p1: (4, 3, 8)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF83.png"
+ alt="[Figure 83. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 83. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-419"></a></var><br>
+ <blockquote><p>Calls <code>transform.shear()</code> with the same arguments
+ and returns its
+ return value, namely, a <code>Transform</code> representing the shearing operation
+ only.
+ 
+         <p>Shearing modifies each coordinate of a <code>Point</code>
+ proportionately to the values of the other two coordinates. 
+ Let x_0, y_0, and z_0 stand for the coordinates of
+ a <code>Point</code> P before <code>P.shear(</code>\alpha, \beta,
+ \gamma, \delta, \epsilon, \zeta
+ <code>)</code>,
+ and x_1, y_1, and z_1
+ for its coordinates afterwards.
+ 
+      <pre class="display">          x_1 == x_0 + \alpha y + \beta z
+           y_1 == y_0 + \gamma x + \delta z
+           z_1 == z_0 + \epsilon x + \zeta y
+ </pre>
+         <p>[next figure]
+  demonstrates the effect of shearing the four
+ <code>Points</code> of a
+ 3 * 3
+ 
+         <p><code>Rectangle</code> (i.e., a square) r in the x-y plane using only an
+ <var>xy</var> argument, making it non-rectangular.
+ 
+      <pre class="example">          Point P0;
+           Point P1(3);
+           Point P2(3, 3);
+           Point P3(0, 3);
+           Rectangle r(p0, p1, p2, p3);
+           r.draw();
+           r.shear(1.5);
+           r.draw(black, "evenly");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF84.png"
+ alt="[Figure 84. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 84. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-420"></a></var><br>
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-421"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::shift()</code> on <code>transform</code>, and returns its return
+ value, namely, a <code>Transform</code> representing the shifting operation
+ only.
+ 
+         <p>The <code>Point</code> is shifted <var>x</var> units in the direction of the
+ positive x-axis, <var>y</var> units in the direction of the
+ positive y-axis, and <var>z</var> units in the direction of the
+ positive z-axis.
+ 
+      <pre class="example">          p0(1, 2, 3);
+           p0.shift(2, 3, 5);
+           p0.show("p0:");
+           -| p0: (3, 5, 8)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-422"></a></var><br>
+ &mdash; Function: Transform <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-423"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Transform::shift_times()</code> on <code>transform</code> and
+ returns its return value, namely the new value of <code>transform</code>.
+ 
+         <p><code>shift_times()</code> makes it possible to increase the magnitude of a
+ shift applied to a <code>Point</code>, while maintaining its direction. 
+ Please note that <code>shift_times()</code> will only have an effect
+ if it's called after a call to
+ <code>shift()</code> and before <code>transform</code> is reset. 
+ This is performed by <code>reset_transform()</code>, which is called in
+ <code>apply_transform()</code>, and can also be called directly. 
+ See <a href="#Resetting-Transforms">Transform Reference; Resetting</a>, and
+ <a href="#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>.
+ 
+      <pre class="example">          Point P;
+           P.drawdot();
+           P.shift(1, 1, 1);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+           P.shift_times(2, 2, 2);
+           P.drawdot();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF85.png"
+ alt="[Figure 85. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 85. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Applying-Transformations-to-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Projecting-Points">Projecting Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Points">Affine Transformations for Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.13 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-424"></a></var><br>
+ <blockquote><p>Updates <code>world_coordinates</code> by multiplying it by <code>transform</code>,
+ which is subsequently reset to the identity <code>Transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Projecting-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Vector-Operations">Vector Operations</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Applying-Transformations-to-Points">Applying Transformations to Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.14 Projecting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>project</b> (<var>const Focus&amp; f, </var>[<var>const unsigned short proj = Projections::PERSP, </var>[<var>real factor = 1</var>]])<var><a name="index-project-425"></a></var><br>
+ &mdash; Function: bool <b>project</b> ([<var>const unsigned short&amp; proj = Projections::PERSP, </var>[<var>real factor = 1</var>]])<var><a name="index-project-426"></a></var><br>
+ <blockquote><p>These functions calculate <code>projective_coordinates</code>. 
+ <var>proj</var> indicates which projection is to be performed. 
+ If it is <code>Projections::PERSP</code>, then <var>f</var> indicates which
+ <code>Focus</code> is to be used (in the first version), or the global variable
+ <code>default_focus</code> is used (in the second).  If
+ <code>Projections::PARALLEL_X_Y</code>, <code>Projections::PARALLEL_X_Z</code>, or
+ <code>Projections::PARALLEL_Z_Y</code> is used, <var>f</var> is ignored, since
+ these projections don't use a <code>Focus</code>.  Currently, no other
+ projections are defined.  The x and y coordinates in
+ <code>projective_coordinates</code> are multiplied by <var>factor</var> with the default
+ being 1. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Vector-Operations"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Points-and-Lines">Points and Lines</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Projecting-Points">Projecting Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.15 Vector Operations</h3>
+ 
+ <p>Mathematically speaking, vectors and points are not the same.  However,
+ they can both be represented as triples of real numbers (in a
+ three-dimensional Cartesian space).  It is sometimes convenient to treat
+ points as though they were vectors, and vice versa.  In particular, it
+ is convenient to use the same data type, namely <code>class Point</code>, to
+ represent both points and vectors in 3DLDF.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>dot_product</b> (<var>Point p</var>)<var><a name="index-dot_005fproduct-427"></a></var><br>
+ <blockquote><p>Returns the dot or scalar product of <code>*this</code> and <var>p</var>.
+ 
+         <p>If P and Q are <code>Points</code>,
+      <pre class="display">          P \dot Q = x_P * x_Q + y_P * y_Q + z_P * z_Q = |P||Q| * cos(\theta)
+ </pre>
+         <p>where  |P|
+ and |Q| are the magnitudes of
+ P and Q, respectively, and \theta
+ is the angle between P and Q.
+ 
+         <p>Since
+      <pre class="display">          \theta = arccos(P \dot Q / |P||Q|),
+ </pre>
+         <p>the dot product can be used for finding the angle between two vectors.
+ 
+      <pre class="example">          Point P(1, -1, -1);
+           Point Q(3, 2, 5);
+           cout &lt;&lt; P.angle(Q);
+           -| 112.002
+           cout &lt;&lt; P.dot_product(Q);
+           -| -4
+           real P_Q_angle = (180.0 / PI)
+                            * acos(P.dot_product(Q)
+                            / (P.magnitude() * Q.magnitude()));
+           cout &lt;&lt; P_Q_angle;
+           -| 112.002
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF86.png"
+ alt="[Figure 86. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 86. 
+ <br>
+ </p>
+ 
+         <p>If the angle \theta between two vectors P and Q is
+ 90 degrees
+ , then
+ \cos(\theta) is 0, so
+ P \dot Q
+ will also be 0.  Therefore,
+ <code>dot_product()</code> can be used as a test for the orthogonality of vectors.
+ 
+      <pre class="example">          Point P(2);
+           Point Q(P);
+           Point Q0(P0);
+           Q0 *= Q.rotate(0, 0, 90);
+           P *= Q.rotate(0, 45, 45);
+           P *= Q.rotate(45);
+           cout &lt;&lt; P.angle(Q);
+           -| 90
+           cout &lt;&lt; P.dot_product(Q);
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF87.png"
+ alt="[Figure 87. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 87. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>cross_product</b> (<var>Point p</var>)<var><a name="index-cross_005fproduct-428"></a></var><br>
+ <blockquote><p>Returns the cross or vector product of <code>*this</code> and <var>p</var>.
+ 
+         <p>If P and Q are <code>Points</code>,
+ 
+      <pre class="display">          P * Q = ((y_P * z_Q - z_P * y_Q), (z_P * x_Q - x_P * z_Q),
+           (x_P * y_Q - y_P * x_Q)) = |P||Q| * sin(\theta) * n,
+ </pre>
+         <p>where |P| and |Q| are the magnitudes of
+ P and Q, respectively,
+ \theta is the angle between P and Q, and n
+ is a unit vector
+ perpendicular to both P and Q in the direction of a
+ right-hand screw from P towards Q.  Therefore,
+ <code>cross_product()</code> can be used to find the normals to planes.
+ 
+      <pre class="example">          Point P(2, 2, 2);
+           Point Q(-2, 2, 2);
+           Point n = P.cross_product(Q);
+           n.show("n:");
+           -| n: (0, -8, 8)
+           real theta = (PI / 180.0) * P.angle(Q);
+           cout &lt;&lt; theta;
+           -| 1.23096
+           real n_mag = P.magnitude() * Q.magnitude() * sin(theta);
+           cout &lt;&lt; n_mag;
+           -| 11.3137
+           n /= n_mag;
+           cout &lt;&lt; n.magnitude();
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF88.png"
+ alt="[Figure 88. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 88. 
+ <br>
+ </p>
+ 
+         <p>If
+ \theta = 0 degrees or 180 degrees,
+ \sin(\theta) will be 0, and
+ P * Q
+  will be (0, 0, 0). 
+ The cross product thus provides a test for parallel vectors.
+ 
+      <pre class="example">          Point P(1, 2, 1);
+           Point Q(P);
+           Point R;
+           R *= Q.shift(-3, -1, 1);
+           Point s(Q - R);
+           Point n = P.cross_product(s);
+           n.show("n:");
+           -| n: (0, 0, 0)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF89.png"
+ alt="[Figure 89. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 89. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>magnitude</b> (<var>void</var>)<var><a name="index-magnitude-429"></a></var><br>
+ <blockquote><p>Returns the magnitude of the <code>Point</code>.  This is its distance from
+ <code>origin</code> and is equal to
+ sqrt(x^2 + y^2 + z^2).
+ 
+      <pre class="example">          Point P(13, 15.7, 22);
+           cout &lt;&lt; P.magnitude();
+           -| 29.9915
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>angle</b> (<var>Point p</var>)<var><a name="index-angle-430"></a></var><br>
+ <blockquote><p>Returns the angle in degrees between two <code>Points</code>.
+ 
+      <pre class="example">          Point P(3.75, -1.25, 6.25);
+           Point Q(-5, 2.5, 6.25);
+           real angle = P.angle(Q);
+           cout &lt;&lt; angle;
+           -| 73.9084
+           Point n = origin.get_normal(P, Q);
+           n.show("n:");
+           -| n: (0.393377, 0.91788, -0.0524503)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF90.png"
+ alt="[Figure 90. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 90. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Point <b>unit_vector</b> (<var>const bool assign, </var>[<var>const bool silent = false</var>])<var><a name="index-unit_005fvector-431"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>unit_vector</b> (<var>void</var>)<var><a name="index-unit_005fvector-432"></a></var><br>
+ <blockquote><p>These functions return a <code>Point</code> with the x, y, and z-coordinates
+ of <code>world_coordinates</code> divided by the magnitude of the <code>Point</code>. 
+ The magnitude of the resulting <code>Point</code> is thus 1.  The first
+ version assigns the result to <code>*this</code> and should only ever be
+ called with <var>assign</var> = <code>true</code>.  Calling it with the
+ argument <code>false</code> is equivalent to calling the <code>const</code> version,
+ with no assignment.  If <code>unit_vector()</code> is called with <var>assign</var>
+ and <var>silent</var> both <code>false</code>, it issues a warning message is
+ issued and the <code>const</code> version is called.  If <var>silent</var> is
+ <code>true</code>, the message is suppressed.
+ 
+      <pre class="example">          Point P(21, 45.677, 91);
+           Point Q = P.unit_vector();
+           Q.show("Q:");
+           -| Q: (0.201994, 0.439357, 0.875308)
+           P.rotate(30, 25, 10);
+           P.show("P:");
+           P: (-19.3213, 82.9627, 59.6009)
+           cout &lt;&lt; P.magnitude();
+           -| 103.963
+           P.unit_vector(true);
+           P.show("P:");
+           -| P: (-0.185847, 0.797999, 0.573287)
+           cout &lt;&lt; P.magnitude();
+           -| 1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Points-and-Lines"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Intersections">Point Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Vector-Operations">Vector Operations</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.16 Points and Lines</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>get_line</b> (<var>const Point&amp; p</var>)<var><a name="index-get_005fline-433"></a></var><br>
+ <blockquote><p>Returns the <code>Line</code> <var>l</var> corresponding to the line from <code>*this</code> to
+ <var>p</var>.  <var>l</var>.<code>position</code> will be <code>*this</code>, and
+ <var>l</var>.<code>direction</code> will be <var>p</var> - <code>*this</code>. 
+ See <a href="#Line-Reference">Line Reference</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>slope</b> (<var>Point p, </var>[<var>char m = 'x', </var>[<var>char n = 'y'</var>]])<var><a name="index-slope-434"></a></var><br>
+ <blockquote><p>Returns a <code>real</code> number representing the slope of the <em>trace</em>
+ of the line defined by
+ <code>*this</code> and <var>p</var> on the plane indicated by the arguments <var>m</var>
+ and <var>n</var>.
+ 
+      <pre class="example">          Point p0(3, 4, 5);
+           Point p1(2, 7, 12);
+           real r = p0.slope(p1, 'x', 'y');
+           &rArr; r == -3
+           r = p0.slope(p1, 'x', 'z');
+           &rArr; r == -7
+           r = p0.slope(p1, 'z', 'y');
+           &rArr; r == 0.428571
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: bool_real <b>is_on_segment</b> (<var>Point p0, Point p1</var>)<var><a name="index-is_005fon_005fsegment-435"></a></var><br>
+ &mdash; <code>const</code> function: bool_real <b>is_on_segment</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-is_005fon_005fsegment-436"></a></var><br>
+ <blockquote><p>These functions return a <code>bool_real</code>, where the <code>bool</code> part is
+ <code>true</code>, if
+ the <code>Point</code> lies on the line segment between <var>p0</var> and <var>p1</var>,
+ otherwise <code>false</code>.  If the <code>Point</code> lies on the line segment, the
+ <code>real</code> part is a value
+ r such that
+ 0 &lt;= r &lt;= 1
+ indicating how far the <code>Point</code> is along the way from
+ <var>p0</var> to <var>p1</var>.  For example, if the <code>Point</code> is half of the way
+ from <var>p0</var> to <var>p1</var>, r will be .5.  If the <code>Point</code>
+ does not lie on the line
+ segment, but on the <em>line</em> passing through <var>p0</var> and <var>p1</var>,
+ r will be &lt;0 or &gt;1.
+ 
+         <p>If the <code>Point</code> doesn't lie on the line passing through <var>p0</var> and
+ <var>p1</var>,
+ r will be <code>INVALID_REAL</code>.
+ 
+      <pre class="example">          Point p0(-1, -2, 1);
+           Point p1(3, 2, 5);
+           Point p2(p0.mediate(p1, .75));
+           Point p3(p0.mediate(p1, 1.5));
+           Point p4(p2);
+           p4.shift(-2, 1, -1);
+           bool_real br = p2.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 1
+           cout &lt;&lt; br.second;
+           -| 0.75
+           bool_real br = p3.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 0
+           cout &lt;&lt; br.second;
+           -| 1.5
+           bool_real br = p4.is_on_segment(p0, p1);
+           cout &lt;&lt; br.first;
+           -| 0
+           cout &lt;&lt; br.second;
+           -| 3.40282e+38
+           cout &lt;&lt; (br.second == INVALID_REAL)
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF91.png"
+ alt="[Figure 91. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 91. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_real <b>is_on_line</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-is_005fon_005fline-437"></a></var><br>
+ <blockquote><p>Returns a <code>bool_real</code> where the <code>bool</code> part is <code>true</code>, if
+ the <code>Point</code> lies on the line passing through <var>p0</var> and <var>p1</var>,
+ otherwise <code>false</code>.  If the <code>Point</code> lies on the line, the
+ <code>real</code> part is a value r indicating how how far the <code>Point</code>
+ is along the way from <var>p0</var> to <var>p1</var>, otherwise
+ <code>INVALID_REAL</code>.  The following
+ values of r are possible for a call to <code>P.is_on_line(A, B)</code>,
+ where the <code>Point</code> P lies on the line
+ AB:
+ 
+      <pre class="display">          P == A &mdash;&gt; r== 0.
+           
+           P == B &mdash;&gt; r== 1.
+           
+           P lies on the opposite side of A from B &mdash;&gt; r &lt; 0.
+           
+           P lies between A and B &mdash;&gt; 0 &lt;  r &lt; 1.
+           
+           P lies on the opposite side of A from B &mdash;&gt; r &gt; 1
+ </pre>
+         <pre class="example">          Point A(-1, -2);
+           Point B(2, 3);
+           Point C(B.mediate(A, 1.25));
+           bool_real br = C.is_on_line(A, B);
+           Point D(A.mediate(B));
+           br = D.is_on_line(A, B);
+           Point E(A.mediate(B, 1.25));
+           br = E.is_on_line(A, B);
+           Point F(D);
+           F.shift(-1, 1);
+           br = F.is_on_line(A, B);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF92.png"
+ alt="[Figure 92. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 92. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>mediate</b> (<var>Point p, </var>[<var>const real r = .5</var>])<var><a name="index-mediate-438"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> <var>r</var> of the way from <code>*this</code> to <var>p</var>.
+ 
+      <pre class="example">          Point p0(-1, 0, -1);
+           Point p1(10, 0, 10);
+           Point p2(5, 5, 5);
+           Point p3 = p0.mediate(p1, 1.5);
+           p3.show("p3:");
+           -| p3: (15.5, 0, 15.5)
+           Point p4 = p0.mediate(p2, 1/3.0);
+           p4.show("p4:");
+           -| p4: (1, 1.66667, 1)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF93.png"
+ alt="[Figure 93. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 93. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Intersections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Point-Drawing-Functions">Point Drawing Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Points-and-Lines">Points and Lines</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.17 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Static function: bool_point <b>intersection_point</b> (<var>Point p0, Point p1, Point q0, Point q1</var>)<var><a name="index-intersection_005fpoint-439"></a></var><br>
+ &mdash; Static function: bool_point <b>intersection_point</b> (<var>Point p0, Point p1, Point q0, Point q1, const bool trace</var>)<var><a name="index-intersection_005fpoint-440"></a></var><br>
+ <blockquote><p>These functions find the intersection point, if any, of the lines determined by
+ <var>p0</var> and <var>p1</var> on the one hand, and <var>q0</var> and <var>q1</var> on the other.
+ 
+         <p>Let <code>bp</code> be the <code>bool_point</code> returned by
+ <code>intersection_point()</code>.  If an intersection point is found, the
+ corresponding <code>Point</code> will be stored in <code>bp.pt</code>, otherwise,
+ <code>bp.pt</code> will be set to <code>INVALID_POINT</code>.  If the intersection
+ point lies on both of the line segments, <code>bp.b</code> will be
+ <code>true</code>, otherwise, <code>false</code>.
+ 
+         <p>The two versions use different methods of finding the intersection
+ point.  The first uses a vector calculation, the second looks for the
+ intersections of the traces of the lines on the major planes.  If the
+ <var>trace</var> argument is used, the second version will be called, whether
+ <var>trace</var> is <code>true</code> or <code>false</code>.  Ordinarily, there should be
+ no need to use the trace version.
+ 
+      <pre class="example">          Point A(-1, -1);
+           Point B(1, 1);
+           Point C(-1, 1);
+           Point D(1, -1);
+           bool_point bp = Point::intersection_point(A, B, C, D);
+           bp.pt.dotlabel("$i$");
+           cout &lt;&lt; "bp.b == " &lt;&lt; bp.b &lt;&lt; endl &lt;&lt; flush;
+           -| bp.b == 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF94.png"
+ alt="[Figure 94. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 94. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point A(.5, .5);
+           Point B(1.5, 1.5);
+           Point C(-1, 1);
+           Point D(1, -1);
+           bool_point bp = Point::intersection_point(A, B, C, D, true);
+           bp.pt.dotlabel("$i$");
+           cout &lt;&lt; "bp.b == " &lt;&lt; bp.b &lt;&lt; endl &lt;&lt; flush;
+           -| bp.b == 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF95.png"
+ alt="[Figure 95. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 95. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Point-Drawing-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Labelling-Points">Labelling Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Intersections">Point Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.18 Drawing</h3>
+ 
+ <p>There are two versions for each of the drawing functions.  The second
+ one has the <code>Picture</code> argument <var>picture</var> at the beginning of the
+ argument list, rather than at the end.  This is convenient when passing
+ a <code>picture</code> argument.  Where <var>picture</var> is optional, the default
+ is always <code>current_picture</code>.
+ 
+    <p><a name="index-output-file-441"></a><a name="index-file_002c-output-442"></a><a name="index-pen-expression-443"></a>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>drawdot</b> ([<var>const Color&amp; ddrawdot_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-drawdot-444"></a></var><br>
+ &mdash; <code>const</code> function: void <b>drawdot</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddrawdot_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ppen = "", </var>]]])<var><a name="index-drawdot-445"></a></var><br>
+ <blockquote><p>Draws a dot on <var>picture</var>.  If <var>ppen</var> is specified, a &ldquo;pen
+ expression&rdquo; is included in the <code>drawdot</code> command written to
+ <code>out_stream</code>.  Otherwise, MetaPost's <code>currentpen</code> is used. 
+ If <var>ddrawdot_color</var> is specified, the dot will be drawn using that
+ <code>Color</code>.  Otherwise, the <code>Color</code> currently pointed to by the pointer
+ <code>Colors::default_color</code> will be used.  This will normally be
+ <code>Colors::black</code>.  See <a href="#Color-Reference">Color Reference</a>, for more information
+ about <code>Colors</code> and the <code>namespace Colors</code>.
+ 
+         <p>Please note that the &ldquo;dot&rdquo; will always be parallel to the plane of
+ projection.  Even where it appears to be a surface, as in [next figure]
+ , it
+ is never put into perspective, but will always have the same size and
+ shape.
+ 
+      <pre class="example">          Point P(1, 1);
+           P.drawdot(gray, "pensquare scaled 1cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF96.png"
+ alt="[Figure 96. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 96. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undrawdot</b> ([<var>string pen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-undrawdot-446"></a></var><br>
+ &mdash; Function: void <b>undrawdot</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>string pen = ""</var>]])<var><a name="index-undrawdot-447"></a></var><br>
+ <blockquote><p>Undraws a dot on <var>picture</var>.  If <var>ppen</var> is specified, a &ldquo;pen
+ expression&rdquo; is included in the <code>undrawdot</code> command written to
+ <code>out_stream</code>.  Otherwise, MetaPost's <code>currentpen</code> is used.
+ 
+      <pre class="example">          Point P(1, 1);
+           P.drawdot(gray, "pensquare scaled 1cm");
+           P.undrawdot("pencircle scaled .5cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF97.png"
+ alt="[Figure 97. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 97. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>draw</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>bool aarrow = </var><code>false</code>]]]]])<var><a name="index-draw-448"></a></var><br>
+ &mdash; Function: void <b>draw</b> (<var>Picture&amp; picture = </var><code>current_picture</code><var>, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>bool aarrow = </var><code>false</code>]]]])<var><a name="index-draw-449"></a></var><br>
+ <blockquote><p>Draws a line from <code>*this</code> to <var>p</var>. 
+ Returns the <code>Path *this -- p1</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ for more information.
+ 
+      <pre class="example">          Point P(-1, -1, -1);
+           Point Q(2, 3, 5);
+           P.draw(Q, Colors::gray, "", "pensquare scaled .5cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF98.png"
+ alt="[Figure 98. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 98. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undraw</b> (<var>const Point&amp; p, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-450"></a></var><br>
+ &mdash; Function: void <b>undraw</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]])<var><a name="index-undraw-451"></a></var><br>
+ <blockquote><p>Undraws a line from <code>*this</code> to <var>p</var>. 
+ Returns the <code>Path *this -- p1</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ for more information.
+ 
+      <pre class="example">          Point P(-1, -1, -1);
+           Point Q(2, 3, 5);
+           P.draw(Q, Colors::gray, "", "pensquare scaled .5cm");
+           P.undraw(Q, "evenly scaled 6", "pencircle scaled .3cm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF99.png"
+ alt="[Figure 99. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 99. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+    <p><a name="index-help-lines-452"></a>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>draw_help</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = *Colors::help_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = current_picture</var>]]]])<var><a name="index-draw_005fhelp-453"></a></var><br>
+ &mdash; Function: Path <b>draw_help</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = *Colors::help_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw_005fhelp-454"></a></var><br>
+ <blockquote><p>Draws a &ldquo;help line&rdquo; from <code>*this to </code><var>p</var>, but only if the
+ <code>static Path</code> data member <code>do_help_lines</code> is <code>true</code>. 
+ See <a href="#Path-Data-Members">Path Reference; Data Members</a>.
+ 
+         <p>&ldquo;Help lines&rdquo; are lines that are used when constructing a drawing, but
+ that should not be printed in the final version. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>drawarrow</b> (<var>const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-drawarrow-455"></a></var><br>
+ &mdash; Function: Path <b>drawarrow</b> (<var>Picture&amp; picture, const Point&amp; p, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-drawarrow-456"></a></var><br>
+ <blockquote><p>Draws an arrow from <code>*this</code> to <var>p</var> and returns
+ the <code>Path</code> <code>*this -- p</code>. 
+ The second version is convenient for passing a <code>Picture</code> argument
+ without having to specify all of the other arguments.
+ 
+      <pre class="example">          Point P(-3, -2, 1);
+           Point Q(3, 3, 5);
+           P.drawarrow(Q);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF100.png"
+ alt="[Figure 100. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 100. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Labelling-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Points">Showing Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Drawing-Functions">Point Drawing Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.19 Labelling</h3>
+ 
+ <p>Labels make it possible to include TeX text within a drawing. 
+ Labels are implemented by means of <code>class Label</code>. 
+ The functions <code>label()</code> and <code>dotlabel()</code>, described in this
+ section, create objects of type <code>Label</code>, and add them to the
+ <code>Picture</code>, which was passed to them as an argument
+ (<code>current_picture</code>, by default). 
+ See <a href="#Label-Reference">Label Reference</a>, for more information.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> (<var>const string text_str, </var>[<var>const string position_str = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-457"></a></var><br>
+ &mdash; <code>const</code> function: void <b>label</b> (<var>const short text_short, </var>[<var>const string position_str = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-458"></a></var><br>
+ <blockquote><p>These functions cause a <code>Point</code> to be labelled in the drawing. 
+ The first argument is the text of the label. It can either be a
+ <code>string</code>, in the first version, or a <code>short</code>, in the second. 
+ It will often be the name of the <code>Point</code> in the C++
+  code, for
+ example, <code>"p0"</code>. 
+ It is not possible to automate this kind of
+ labelling, because it is not possible to access the names of variables
+ through the variables themselves in C++
+ .
+ 
+         <p><var>text_str</var> is always placed between
+ &ldquo;<code>btex''</code> and &ldquo;<code>etex</code>&rdquo; in the MetaPost <code>label</code> command
+ written to <code>out_stream</code>.  This makes it possible to include math
+ mode material in the text of labels, as in the following example.
+ 
+      <pre class="example">          Point p0(2, 3);
+           p0.label("$p_0$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF101.png"
+ alt="[Figure 101. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 101. 
+ <br>
+ </p>
+ 
+         <p>If backslashes are needed in the text of the label, then
+ <var>text_str</var> must contain double backslashes, so that single
+ backslashes will be written to <code>out_stream</code>.
+ 
+      <pre class="example">          Point P;
+           Point Q(2, 2);
+           Point R(P.mediate(Q));
+           R.label("$\\overrightarrow{PQ}$", "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF102.png"
+ alt="[Figure 102. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 102. 
+ <br>
+ </p>
+ 
+         <p>The <var>position</var> argument indicates where the text of the label should
+ be located relative to the <code>Point</code>.  The valid values are the
+ strings used in MetaPost for this purpose, i.e., &lsquo;<samp><span class="samp">top</span></samp>&rsquo;, &lsquo;<samp><span class="samp">bot</span></samp>&rsquo;,
+ &lsquo;<samp><span class="samp">lft</span></samp>&rsquo;, &lsquo;<samp><span class="samp">rt</span></samp>&rsquo;, &lsquo;<samp><span class="samp">llft</span></samp>&rsquo; (lower left), &lsquo;<samp><span class="samp">lrt</span></samp>&rsquo; (lower
+ right), &lsquo;<samp><span class="samp">ulft</span></samp>&rsquo; (upper left), and &lsquo;<samp><span class="samp">urt</span></samp>&rsquo; (upper right).  The
+ default is &lsquo;<samp><span class="samp">top</span></samp>&rsquo;.  3DLDF does not catch the error if an invalid
+ <code>position</code> argument is used; the <code>string</code> is written to the
+ output file and an error will occur when MetaPost is run.
+ 
+         <p>The <var>dot</var> argument is used to determine whether the label should be
+ dotted or not.  The default is <code>false</code>.  The function
+ <code>dotlabel()</code> calls <code>label()</code>, passing <code>true</code> as the
+ latter's <var>dot</var> argument. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>dotlabel</b> ([<var>const string text_str, </var>[<var>const string position_str = "top", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-dotlabel-459"></a></var><br>
+ &mdash; <code>const</code> function: void <b>dotlabel</b> (<var>const short text_short, </var>[<var>const string position_str = "top", </var>[<var>Picture&amp; picture = current_picture</var>]])<var><a name="index-dotlabel-460"></a></var><br>
+ <blockquote><p>These functions are like <code>label()</code> except that they always produces a
+ dot.
+ 
+      <pre class="example">          Point p0(2, 3);
+           p0.dotlabel("$p_0$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF103.png"
+ alt="[Figure 103. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 103. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Points"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Points">Outputting Points</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Labelling-Points">Labelling Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.20 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = true, </var>[<var>const bool do_apply = true, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = Projections::persp, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-461"></a></var><br>
+ <blockquote><p>Prints <var>text</var> followed by the values of a set of coordinates to
+ standard output (<code>stdout</code>).  The other arguments are similar to
+ those used in the functions described in <a href="#Returning-Coordinates">Returning Coordinates</a>.
+ 
+      <pre class="example">          Point P(1, 3, 5);
+           P.rotate(15, 67, 98);
+           P.show("P:");
+           -| P: (-3.68621, -3.89112, 2.50421)
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_transform</b> ([<var>string text = ""</var>])<var><a name="index-show_005ftransform-462"></a></var><br>
+ <blockquote><p>Prints <var>text</var> to standard output (<code>stdout</code>),
+ or <code>"transform:"</code>, if <var>text</var> is the empty <code>string</code> (the
+ default), and then
+ calls <code>transform.show()</code>.
+ 
+      <pre class="example">          Point A(-1, 1, 1);
+           Point B(13, 12, 6);
+           Point Q(31, 17.31, 6);
+           Q.rotate(A, B, 32);
+           Q.show_transform("Q.transform:");
+           -| Q.transform:
+              Transform:
+                0.935   0.212  -0.284       0
+              -0.0749   0.902   0.426       0
+                0.346  -0.377   0.859       0
+               -0.336   0.687  -0.569       1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Points"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Points">Showing Points</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Point-Reference">Point Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">22.21 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Non-member function: ostream&amp; <b>operator&lt;&lt;</b> (<var>ostream&amp; o, Point&amp; p</var>)<var><a name="index-operator_003c_003c-463"></a></var><br>
+ <blockquote><p>Used in <code>Path::output()</code> for writing
+ the x and y values of the <code>projective_coordinates</code> of <code>Points</code> to
+ <code>out_stream</code>.  See <a href="#Outputting-Paths">Path Reference; Outputting</a>. 
+ This is a low-level function that ordinary users should never have to
+ invoke directly. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>output</b> (<var>void</var>)<var><a name="index-output-464"></a></var><br>
+ <blockquote><p>Writes the MetaPost code for drawing or undrawing a <code>Point</code> to
+ <code>out_stream</code>.  Called by <code>Picture::output()</code>, when a
+ <code>Shape</code> on the <code>Picture</code> is a <code>Point</code>. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-465"></a></var><br>
+ <blockquote><p>Sets <code>do_output</code> to <code>false</code>, which causes a <code>Point</code>
+ not to be output.  This function is called in
+ <code>Picture::output()</code>, when a <code>Point</code> cannot be projected. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: virtual <b>void</b><var> unsuppress_output </var>(<var>void</var>)<var><a name="index-void-466"></a></var><br>
+ <blockquote><p>Resets <code>do_output</code> to <code>true</code>, so that a <code>Point</code> can
+ potentially be output, if <code>Picture::output()</code> is called again for
+ the <code>Picture</code> the <code>Point</code> is on. 
+ This function is called in
+ <code>Picture::output()</code>. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: <code>vector&lt;shape*&gt;</code> <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-467"></a></var><br>
+ <blockquote><p>Attempts to project the <code>Point</code>
+ using the arguments passed to <code>Picture::output()</code>, which calls this
+ function.  If <code>extract()</code> succeeds,
+ it returns a <code>vector&lt;shape*&gt;</code> containing only the <code>Point</code>. 
+ Otherwise, it returns an empty <code>vector&lt;shape*&gt;</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-468"></a></var><br>
+ <blockquote><p>Sets &ldquo;extreme&rdquo; values
+ for x, y, and z in <code>projective_coordinates</code>.  This
+ is, of course, trivial for
+ <code>Points</code>, because they only have one x, y and z-coordinate. 
+ So the maxima and minima for each coordinate are always the same. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual inline <code>const</code> function: <code>valarray &lt;real&gt;</code> <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-469"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual <code>const</code> function: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-470"></a></var><br>
+ &mdash; Virtual <code>const</code> function: real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-471"></a></var><br>
+ &mdash; Virtual <code>const</code> function: real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-472"></a></var><br>
+ <blockquote><p>These functions return the minimum, maximum, and mean z-value of the
+ <code>Point</code>. 
+ <code>get_minimum_z()</code> returns <code>projective_extremes[4]</code>,
+ <code>get_maximum_z()</code> returns <code>projective_extremes[5]</code>, and
+ <code>get_mean_z()</code> returns
+ <code>(projective_extremes[4] + projective_extremes[5]) / 2</code>. 
+ However, since a <code>Point</code> has only one z-coordinate
+ (from <code>world_coordinates</code>), these values will all be the same.
+ 
+         <p>These functions are pure virtual functions in <code>Shape</code>, and are
+ called on <code>Points</code> through pointers to <code>Shape</code>.  Therefore,
+ they must be consistent with the versions for other types derived from
+ <code>Shape</code>.  See <a href="#Outputting-Shapes">Shape Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <!-- focus.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Focus-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Line-Reference">Line Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Point-Reference">Point Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">23 Focus Reference</h2>
+ 
+ <p><a name="index-Focus-473"></a>Class <code>Focus</code> is defined in <samp><span class="file">points.web</span></samp>. 
+ <code>Focuses</code> are used when creating a perspective projection. 
+ They represent the center of projection and can be thought of like a
+ camera viewing the scene.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Focus-Data-Members">Focus Data Members</a>
+ <li><a accesskey="2" href="#Focus-Global-Variables">Focus Global Variables</a>
+ <li><a accesskey="3" href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>
+ <li><a accesskey="4" href="#Focus-Operators">Focus Operators</a>
+ <li><a accesskey="5" href="#Modifying-Focuses">Modifying Focuses</a>
+ <li><a accesskey="6" href="#Querying-Focuses">Querying Focuses</a>
+ <li><a accesskey="7" href="#Showing-Focuses">Showing Focuses</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Focus-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Focus-Global-Variables">Focus Global Variables</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Reference">Focus Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>position</b><var><a name="index-position-474"></a></var><br>
+ <blockquote><p>The location of the <code>Focus</code> in the world coordinate system. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>direction</b><var><a name="index-direction-475"></a></var><br>
+ <blockquote><p>The direction of view from <code>position</code> into the scene. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>up</b><var><a name="index-up-476"></a></var><br>
+ <blockquote><p>The direction that will be at the top of the projected drawing. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>distance</b><var><a name="index-distance-477"></a></var><br>
+ <blockquote><p>The distance of the <code>Focus</code> from the plane of projection. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>angle</b><var><a name="index-angle-478"></a></var><br>
+ <blockquote><p>Used for determining the <code>up</code> direction. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: char <b>axis</b><var><a name="index-axis-479"></a></var><br>
+ <blockquote><p>The main axis onto which the <code>Focus</code> is transformed in order to
+ perform the perspective projection, z by default.
+ 
+         <p>It will normally not matter which axis is used, but it might be
+ advantageous to use a particular axis in some special situations. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>transform</b><var><a name="index-transform-480"></a></var><br>
+ <blockquote><p>The <code>Transform</code>, which will be applied to the <code>Shapes</code> on the
+ <code>Picture</code>, when the latter is output.  The effect of this is
+ equivalent to transforming the <code>Focus</code>, so that it lies on a major
+ axis.
+ 
+      <pre class="example">          Focus f(5, 5, -10, 2, 4, 10, 10, 180);
+           &rArr;
+ </pre>
+         <pre class="display">          <code>f.transform</code> ==
+            0.989  -0.00733  -0.148  0
+            0       0.999    -0.0494 0
+            0.148   0.0488    0.988  0
+           -3.4    -4.47      0.865  1
+           
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: Transform <b>persp</b><var><a name="index-persp-481"></a></var><br>
+ <blockquote><p>The <code>Transform</code> representing the perspective transformation for a
+ particular <code>Focus</code>. 
+ Let d stand for <code>distance</code>, then
+      <pre class="display">          <code>persp</code> ==
+           1 0 0  0
+           0 1 0  0
+           0 0 0 1/d
+           0 0 0  1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Focus-Global-Variables"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Data-Members">Focus Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.2 Global Variables</h3>
+ 
+ <div class="defun">
+ &mdash; Variable: Focus <b>default_focus</b><var><a name="index-default_005ffocus-482"></a></var><br>
+ <blockquote><p>Effectively, the default <code>Focus</code> in <code>Picture::output()</code>. 
+ See <a href="#Picture-Output-Functions">Picture Reference; Outputting; Functions</a>. 
+ It's not really the default, but the version of
+ <code>output()</code> that doesn't take a
+ <code>Focus</code> argument calls another version
+ that does take one, passing <code>default_focus</code> to the
+ latter as its <code>Focus</code> argument.
+ 
+         <p>It's necessary to do this in such a roundabout way,
+ because <code>Picture::output()</code> must be declared before
+ <code>class Focus</code> is completely defined and <code>default_focus</code> is declared.
+ 
+         <p>The declaration &lsquo;<samp><span class="samp">Focus&amp; f = default_focus;</span></samp>&rsquo; makes <code>f</code> a
+ reference to <code>default_focus</code>, i.e., it makes <code>f</code> another name
+ for <code>default_focus</code>.  This may be convenient, if you don't feel
+ like typing <code>default_focus</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Focus-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Focus-Operators">Focus Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Global-Variables">Focus Global Variables</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.3 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Focus</b> (<var>void</var>)<var><a name="index-Focus-483"></a></var><br>
+ <blockquote><p>Creates an empty <code>Focus</code>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Focus</b> (<var>const real pos_x, const real pos_y, const real pos_z, const real dir_x, const real dir_y, const real dir_z, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-Focus-484"></a></var><br>
+ <blockquote><p>Constructs a <code>Focus</code> using the first three <code>real</code> arguments as
+ the x, y, and z-coordinates of <code>position</code>, and the fourth through the
+ sixth argument as the x, y, and z-coordinates of <code>direction</code>.  <var>dist</var>
+ specifies the distance of the <code>Focus</code>
+ from the plane of projection, <var>ang</var> the angle of rotation, which affects which
+ direction is considered to be &ldquo;up&rdquo;, and <var>ax</var> the major axis to
+ which the <code>Focus</code> is aligned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const real pos_x, const real pos_y, const real pos_z, const real dir_x, const real dir_y, const real dir_z, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-set-485"></a></var><br>
+ <blockquote><p>Resets an existing <code>Focus</code>.  Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Focus</b> (<var>const Point&amp; pos, const Point&amp; dir, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-Focus-486"></a></var><br>
+ <blockquote><p>Constructs a <code>Focus</code> using <code>Point</code> arguments for
+ <code>position</code> and <code>direction</code>.  Otherwise, the arguments of this constructor
+ correspond to those of the one above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; pos, const Point&amp; dir, const real dist, </var>[<var>const real ang = 0, </var>[<var>char ax = 'z'</var>]])<var><a name="index-set-487"></a></var><br>
+ <blockquote><p>Resets an existing <code>Focus</code>.  Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Focus-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Focuses">Modifying Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: const Focus&amp; <b>operator=</b> (<var>const Focus&amp; f</var>)<var><a name="index-operator_003d-488"></a></var><br>
+ <blockquote><p>Sets the <code>Focus</code> to <var>f</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Focuses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Focuses">Querying Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Operators">Focus Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.5 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>reset_angle</b> (<var>const real ang</var>)<var><a name="index-reset_005fangle-489"></a></var><br>
+ <blockquote><p>Resets the value of <code>angle</code> and recalculates the <code>Transforms</code>
+ <code>transform</code> and <code>persp</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Focuses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Focuses">Showing Focuses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Focuses">Modifying Focuses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.6 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_position</b> (<var>void</var>)<var><a name="index-get_005fposition-490"></a></var><br>
+ <blockquote><p>Returns <code>position</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_direction</b> (<var>void</var>)<var><a name="index-get_005fdirection-491"></a></var><br>
+ <blockquote><p>Returns <code>direction</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_distance</b> (<var>void</var>)<var><a name="index-get_005fdistance-492"></a></var><br>
+ <blockquote><p>Returns <code>distance</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Point&amp; <b>get_up</b> (<var>void</var>)<var><a name="index-get_005fup-493"></a></var><br>
+ <blockquote><p>Returns <code>up</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Transform&amp; <b>get_transform</b> (<var>void</var>)<var><a name="index-get_005ftransform-494"></a></var><br>
+ <blockquote><p>Returns <code>transform</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_transform_element</b> (<var>const unsigned int row, const unsigned int column</var>)<var><a name="index-get_005ftransform_005felement-495"></a></var><br>
+ <blockquote><p>Returns an element of <code>transform</code>, given two <code>unsigned ints</code> for the row
+ and the column. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const Transform&amp; <b>get_persp</b> (<var>void</var>)<var><a name="index-get_005fpersp-496"></a></var><br>
+ <blockquote><p>Returns <code>persp</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: const real&amp; <b>get_persp_element</b> (<var>const unsigned int row, const unsigned int column</var>)<var><a name="index-get_005fpersp_005felement-497"></a></var><br>
+ <blockquote><p>Returns an element of <code>persp</code>, given two <code>unsigned ints</code> for the row
+ and the column. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Focuses"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Focuses">Querying Focuses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Focus-Reference">Focus Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">23.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>const string text_str = "Focus:", </var>[<var>const bool show_transforms = false</var>]])<var><a name="index-show-498"></a></var><br>
+ <blockquote><p>Prints <var>text_str</var> to standard output (<code>stdout</code>), then calls
+ <code>Point::show()</code> on <code>position</code>, <code>direction</code>, and
+ <code>up</code>.  Then the values of <code>distance</code>, <code>axis</code>, and
+ <code>angle</code> are printed to <code>stdout</code>.  If <var>show_transforms</var> is
+ <code>true</code>, <code>transform</code> and <code>persp</code> are shown as well. 
+ </p></blockquote></div>
+ 
+ <!-- line.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Line-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Plane-Reference">Plane Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Focus-Reference">Focus Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">24 Line Reference</h2>
+ 
+ <p><a name="index-Line-499"></a>The <code>struct Line</code> is defined in <samp><span class="file">lines.web</span></samp>. 
+ <code>Lines</code> are not <code>Shapes</code>.  They are used for
+ performing vector operations.  A <code>Line</code> is defined by a
+ <code>Point</code> representing a position vector and a <code>Point</code>
+ representing a direction vector.
+ 
+    <p>See also the descriptions of <code>Point::get_line()</code> in
+ <a href="#Points-and-Lines">Points and Lines</a>, and
+ <code>Path::get_line()</code> in
+ <a href="#Querying-Paths">Path Reference; Querying</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Line-Data-Members">Line Data Members</a>
+ <li><a accesskey="2" href="#Line-Global-Constants">Line Global Constants</a>
+ <li><a accesskey="3" href="#Line-Constructors">Line Constructors</a>
+ <li><a accesskey="4" href="#Line-Operators">Line Operators</a>
+ <li><a accesskey="5" href="#Get-Path">Get Path</a>
+ <li><a accesskey="6" href="#Showing">Showing</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Line-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Line-Global-Constants">Line Global Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Reference">Line Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>position</b><var><a name="index-position-500"></a></var><br>
+ <blockquote><p>Represents the position vector of the <code>Line</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>direction</b><var><a name="index-direction-501"></a></var><br>
+ <blockquote><p>Represents the direction vector of the <code>Line</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Line-Global-Constants"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Line-Constructors">Line Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Data-Members">Line Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.2 Global Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Line <b>INVALID_LINE</b><var><a name="index-INVALID_005fLINE-502"></a></var><br>
+ <blockquote><p><code>position</code> and <code>direction</code> are both <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Line-Constructors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Line-Operators">Line Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Global-Constants">Line Global Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Line</b> (<var>const Point&amp; pos = </var><code>origin</code><var>, const Point&amp; dir = </var><code>origin</code>)<var><a name="index-Line-503"></a></var><br>
+ <blockquote><p>Creates a <code>Line</code>, setting <code>position</code> to <var>pos</var>, and
+ <code>direction</code> to <var>dir</var>.  If this function is called with no
+ arguments, it creates a <code>Line</code> at the <code>origin</code> with no
+ direction.
+ 
+      <pre class="example">          Point p(2, 1, 2);
+           Point d(-3, 3, 3.5);
+           Line L0(p, d);
+           Line L1 = p.get_line(d);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF104.png"
+ alt="[Figure 104. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 104. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Line</b> (<var>const Line&amp; l</var>)<var><a name="index-Line-504"></a></var><br>
+ <blockquote><p>Creates a <code>Line</code>, making it a copy of <var>l</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Line-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Get-Path">Get Path</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Constructors">Line Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Line&amp; l</var>)<var><a name="index-operator_003d-505"></a></var><br>
+ <blockquote><p>Sets <code>*this</code> to <var>l</var>. 
+ </p></blockquote></div>
+ 
+ <!-- LDF 2003.06.03.  Add description of @code{get_distance()}, when I've -->
+ <!-- fixed it. -->
+ <div class="node">
+ <a name="Get-Path"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing">Showing</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Operators">Line Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.5 Get Path</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>get_path</b> (<var>void</var>)<var><a name="index-get_005fpath-506"></a></var><br>
+ <blockquote><p>Returns a linear <code>Path</code> with two <code>Points</code>
+ on the <code>Line</code>.  The first <code>Point</code> will be <code>position</code>, and
+ the second will be <code>position + direction</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Get-Path">Get Path</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Line-Reference">Line Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">24.6 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-507"></a></var><br>
+ <blockquote><p>If <var>text</var> is not the empty <code>string</code> (the default), it is
+ printed on a line of its own to standard output.  Otherwise, &lsquo;<samp><span class="samp">Line:</span></samp>&rsquo;
+ is printed.  Following this, <code>Point::show()</code> is called on
+ <code>position</code> and <code>direction</code>.
+ 
+      <pre class="example">          Point p(1, -2, 3);
+           Point d(-12.3, 21, 36.002);
+           Line L0(p, d);
+           L0.show("L0:");
+           -| L0:
+              position: (1, -2, 3)
+              direction: (-12.3, 21, 36.002)
+           Line L1 = p.get_line(d);
+           L1.show("L1:");
+           -| L1:
+              position: (1, -2, 3)
+              direction: (-13.3, 23, 33.002)
+           Path q = L1.get_path();
+           q.show("q:");
+           -| q:
+              fill_draw_value == 0
+              (1, -2, 3) -- (-12.3, 21, 36.002);
+ </pre>
+         </blockquote></div>
+ 
+ <!-- plane.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Plane-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Path-Reference">Path Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Line-Reference">Line Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">25 Plane Reference</h2>
+ 
+ <p><a name="index-Plane-508"></a>The <code>struct Plane</code>  is defined in <samp><span class="file">planes.web</span></samp>. 
+ <code>Planes</code> are not <code>Shapes</code>.  They are used for
+ performing vector operations.  A <code>Plane</code> is defined by a
+ <code>Point</code> representing a point on the plane, a <code>Point</code>
+ representing the normal to the plane, and the distance of the plane from
+ the origin.
+ 
+    <p>The most common use of <code>Planes</code> is to represent the
+ plane in which an existing plane figure lies.  Therefore, they
+ most likely to be created by using <code>Path::get_plane()</code>. 
+ See <a href="#Querying-Paths">Path Reference; Querying</a>.  However, <code>class
+ Plane</code> does have constructors for creating <code>Planes</code> directly, if
+ desired. 
+ See <a href="#Planes-Constructors">Planes Reference; Constructors</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Planes-Data-Members">Planes Data Members</a>
+ <li><a accesskey="2" href="#Planes-Global-Constants">Planes Global Constants</a>
+ <li><a accesskey="3" href="#Planes-Constructors">Planes Constructors</a>
+ <li><a accesskey="4" href="#Planes-Operators">Planes Operators</a>
+ <li><a accesskey="5" href="#Planes-Returning-Information">Planes Returning Information</a>
+ <li><a accesskey="6" href="#Plane-Intersections">Plane Intersections</a>
+ <li><a accesskey="7" href="#Planes-Showing">Planes Showing</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Planes-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Planes-Global-Constants">Planes Global Constants</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Reference">Plane Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.1 Data Members</h3>
+ 
+ <p>Because the main purpose of <code>Plane</code> is to
+ provide information about <code>Shapes</code>, its data members are all
+ <code>public</code>.
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>point</b><var><a name="index-point-509"></a></var><br>
+ <blockquote><p>Represents a point on the plane. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: Point <b>normal</b><var><a name="index-normal-510"></a></var><br>
+ <blockquote><p>Represents the normal to the plane. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public variable: real <b>distance</b><var><a name="index-distance-511"></a></var><br>
+ <blockquote><p>The distance of the plane from the origin. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Planes-Global-Constants"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Planes-Constructors">Planes Constructors</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Planes-Data-Members">Planes Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.2 Global Constants</h3>
+ 
+ <div class="defun">
+ &mdash; Constant: const Plane <b>INVALID_PLANE</b><var><a name="index-INVALID_005fPLANE-512"></a></var><br>
+ <blockquote><p>A <code>Plane</code> with <code>point</code> == <code>normal</code>, and
+ <code>distance</code> == <code>INVALID_REAL</code>.
+ 
+         <p><code>INVALID_PLANE</code> is returned from <code>Path::get_plane()</code>, if the
+ <code>Path</code> is not planar.  See <a href="#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Planes-Constructors"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Planes-Operators">Planes Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Planes-Global-Constants">Planes Global Constants</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.3 Constructors</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Plane</b> (<var>void</var>)<var><a name="index-Plane-513"></a></var><br>
+ <blockquote><p>Creates a degenerate <code>Plane</code> with
+ <code>point</code> == <code>normal</code> == <code>origin</code>, and
+ <code>distance</code> == 0.
+ 
+         <p><code>Planes</code> constructed using this constructor will probably be set
+ using the assignment operator
+ or <code>Path::get_plane()</code>
+ immediately, or
+ very soon after being declared. 
+ See <a href="#Planes-Operators">Planes Reference; Operators</a>, and
+ <a href="#Querying-Paths">Paths Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Plane</b> (<var>const Plane&amp; p</var>)<var><a name="index-Plane-514"></a></var><br>
+ <blockquote><p>Creates a new <code>Plane</code>, making it a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Plane</b> (<var>const Point&amp; p, const Point&amp; n</var>)<var><a name="index-Plane-515"></a></var><br>
+ <blockquote><p>If <var>p</var> is not equal to <var>n</var>, this constructor creates a
+ <code>Plane</code> and sets <code>point</code> to <var>p</var>.  <code>normal</code>
+ is set to <var>n</var>, and made a unit vector. 
+ <code>distance</code> is calculated according to the following formula:
+ Let n stand for <code>normal</code>, p for <code>point</code>, and d for
+ <code>distance</code>:
+ d = -p \dot n. 
+ If d = 0, <code>origin</code>
+ lies in the <code>Plane</code>.  If d &gt; 0, <code>origin</code> lies on the side of the
+ <code>Plane</code> that <code>normal</code> points to, considered to be &ldquo;outside&rdquo;. 
+ If d&lt;0, <code>origin</code> lies on the side of the
+ <code>Plane</code> that <code>normal</code> does not point to, considered to be
+ &ldquo;inside&rdquo;.
+ 
+         <p>However, if <var>p</var> == <var>n</var>, <code>point</code> and <code>normal</code> are
+ both set to <code>INVALID_POINT</code>, and <code>distance</code> is set to
+ <code>INVALID_REAL</code>, i.e., <code>*this</code> will be equal to
+ <code>INVALID_PLANE</code>
+ (see <a href="#Planes-Global-Constants">Planes Reference; Global Constants</a>).
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Point N(0, 1);
+           N.rotate(-35, 30, 20);
+           N.show("N:");
+           -| N: (-0.549659, 0.671664, 0.496732)
+           Plane q(P, N);
+           cout &lt;&lt; q.distance;
+           -| -0.618736
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF105.png"
+ alt="[Figure 105. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 105. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Planes-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Planes-Returning-Information">Planes Returning Information</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Planes-Constructors">Planes Constructors</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: const Plane&amp; <b>operator=</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_003d-516"></a></var><br>
+ <blockquote><p>Sets <code>point</code> to <var>p</var>.<code>point</code>, <code>normal</code> to
+ <var>p</var>.<code>normal</code>, and <code>distance</code> to <var>p</var>.<code>distance</code>. 
+ The return value is <var>p</var>, so that invocations of this function can be
+ chained.
+ 
+      <pre class="example">          Point pt(2, 2.3, 6);
+           Point norm(-1, 12, -36);
+           Plane A(pt, norm);
+           Plane B;
+           Plane C;
+           B = C = A;
+           A.show("A:");
+           -| A:
+              normal: (-0.0263432, 0.316118, -0.948354)
+              point: (2, 2.3, 6)
+              distance == 5.01574
+           cout &lt;&lt; (A == B &amp;&amp; A == C &amp;&amp; B == C);
+           -| 1
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator==</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_003d_003d-517"></a></var><br>
+ <blockquote><p>Equality operator.  Compares <code>*this</code> and <var>p</var>, and returns
+ <code>true</code>, if <code>point</code> == <var>p</var>.<code>point</code>,
+ <code>normal</code> == <var>p</var>.<code>normal</code>, and
+ <code>distance</code> == <var>p</var>.<code>distance</code>,
+ otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> operator: bool <b>operator!=</b> (<var>const Plane&amp; p</var>)<var><a name="index-operator_0021_003d-518"></a></var><br>
+ <blockquote><p>Inequality operator.  Compares <code>*this</code> and <var>p</var> and returns
+ <code>true</code>, if <code>point</code> != 
+  <var>p</var>.<code>point</code>, or
+ <code>normal</code> != 
+  <var>p</var>.<code>normal</code>, or
+ <code>distance</code> != 
+  <var>p</var>.<code>distance</code>. 
+ Otherwise, it returns <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Planes-Returning-Information"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Plane-Intersections">Plane Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Planes-Operators">Planes Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.5 Returning Information</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_short <b>get_distance</b> (<var>const Point&amp; p</var>)<var><a name="index-get_005fdistance-519"></a></var><br>
+ &mdash; <code>const</code> function: real_short <b>get_distance</b> (<var>void</var>)<var><a name="index-get_005fdistance-520"></a></var><br>
+ <blockquote><p>The version of this function taking a <code>Point</code> argument returns
+ a <code>real_short</code> <var>r</var>, whose <code>real</code> part
+ (<var>r</var>.<code>first</code>) represents
+ the distance of <var>p</var> from the <code>Plane</code>.  This value is always
+ positive.  <var>r</var>.<code>second</code> can take on three values:
+ 
+           <dl>
+ <dt>0<dd>If the <code>Point</code> lies in the <code>Plane</code>.
+ 
+           <br><dt>1<dd>If it lies on the side of the <code>Plane</code> pointed at by the
+ normal to the <code>Plane</code>, considered to be the &ldquo;outside&rdquo;.
+ 
+           <br><dt>-1<dd>If it lies on the side of the <code>Plane</code> <em>not</em> pointed at
+ by the normal to the <code>Plane</code>, considered to be the &ldquo;inside&rdquo;. 
+ </dl>
+ 
+         <p>The version taking no argument returns
+ the absolute of the data member <code>distance</code> and its sign, i.e., the
+ distance of <code>origin</code> to the <code>Plane</code>, and which side of the
+ <code>Plane</code> it lies on.
+ 
+         <p>It would have been possible to use <code>origin</code> as the default for an
+ optional <code>Point</code> argument, but I've chosen to overload this
+ function, because of problems that may arise, when I implement
+ <code>user_coordinates</code> and <code>view_coordinates</code>
+ (see <a href="#Point-Data-Members">Point Reference; Data Members</a>).
+ 
+      <pre class="example">          Point N(0, 1);
+           N.rotate(-10, 20, 20);
+           Point P(1, 1, 1);
+           Plane q(P, N);
+           Point A(4, -2, 4);
+           Point B(-1, 3, 2);
+           Point C = q.intersection_point(A, B).pt;
+           real_short bp;
+           
+           bp = q.get_distance();
+           cout &lt;&lt; bp.first;
+           -| 0.675646
+           cout &lt;&lt; bp.second
+           -| -1
+           
+           bp = q.get_distance(A)
+           cout &lt;&lt; bp.first;
+           -| 3.40368
+           cout &lt;&lt; bp.second;
+           -|  -1
+           
+           bp = q.get_distance(B)
+           cout &lt;&lt; bp.first;
+           -| 2.75865
+           cout &lt;&lt; bp.second;
+           -| 1
+           
+           bp = q.get_distance(C)
+           cout &lt;&lt; bp.first;
+           -| 0
+           cout &lt;&lt; bp.second;
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF106.png"
+ alt="[Figure 106. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 106. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Plane-Intersections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Planes-Showing">Planes Showing</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Planes-Returning-Information">Planes Returning Information</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.6 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point <b>intersection_point</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoint-521"></a></var><br>
+ &mdash; <code>const</code> function: bool_point <b>intersection_point</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoint-522"></a></var><br>
+ <blockquote><p>These functions find the intersection point of the <code>Plane</code> and a
+ line.  In the first version, the
+ line is defined by the two <code>Point</code> arguments.  In the second
+ version, the <code>Path</code> <var>p</var> must be linear, i.e.,
+ <var>p</var>.<code>is_linear()</code> must be <code>true</code>.
+ 
+         <p>Both versions of <code>intersection_point()</code> return a <code>bool_point</code>
+ <var>bp</var>, where  <var>bp</var>.<code>pt</code> is the intersection point, or
+ <code>INVALID_POINT</code>, if there is none.  If an intersection point is
+ found, <var>bp</var>.<code>b</code> will be <code>true</code>, otherwise <code>false</code>. 
+ Returning a <code>bool_point</code> makes it possible to test for success
+ without comparing the <code>Point</code> returned against <code>INVALID_POINT</code>.
+ 
+      <pre class="example">          Point center(2, 2, 3.5);
+           Reg_Polygon h(center, 6, 4, 80, 30, 10);
+           Plane q = h.get_plane();
+           Point P0 = center.mediate(h.get_point(2));
+           P0.shift(5 * (N - center));
+           Point P1(P0);
+           P1.rotate(h.get_point(1), h.get_point(4));
+           P1 = 3 * (P1 - P0);
+           P1.shift(P0);
+           P1.shift(3, -.5, -2);
+           bool_point bp = q.intersection_point(P0, P1);
+           Point i_P = bp.pt;
+           Point P4 = h.get_point(3).mediate(h.get_point(0), .75);
+           P4.shift(N - center);
+           Point P5(P4);
+           P5.rotate(h.get_point(3), h.get_point(0));
+           P4.shift(-1, 2);
+           Path theta(P4, P5);
+           bp = q.intersection_point(theta);
+           Point i_theta = bp.pt;
+           draw_axes();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF107.png"
+ alt="[Figure 107. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 107. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>intersection_line</b> (<var>const Plane&amp; p</var>)<var><a name="index-intersection_005fline-523"></a></var><br>
+ <blockquote><p>Returns a <code>Line</code> <var>l</var>.  representing the line of intersection of two
+ <code>Planes</code>.  See <a href="#Line-Reference">Line Reference</a>.
+ 
+         <p>In [next figure]
+ , <code>intersection_line()</code> is used to find the line of
+ intersection of the <code>Planes</code> derived from the <code>Rectangles</code>
+ r_0 and r_1 using <code>get_plane()</code>
+ (see <a href="#Querying-Paths">Paths Reference; Querying</a>). 
+ Please note that there is no guarantee that <var>l</var>.<code>position</code> will
+ be in a convenient place for your drawing.  A bit of fiddling was
+ needed to find the <code>Points</code> P_2 and P_3. 
+ <!-- !! TO DO: -->
+ I plan to add functions for finding the intersection lines of plane
+ figures, but haven't done so yet.
+ 
+      <pre class="example">          Rectangle r0(origin, 5, 5, 10, 15, 6);
+           Rectangle r1(origin, 5, 5, 90, 50, 10);
+           r1 *= r0.rotate(30, 30, 30);
+           r1 *= r0.shift(1, -1, 3);
+           Plane q0 = r0.get_plane();
+           Plane q1 = r1.get_plane();
+           Line l = q0.intersection_line(q1);
+           l.show("l:");
+           -| l:
+              position: (0, 11.2193, 20.0759)
+              direction: (0.0466595, -0.570146, -0.796753)
+           Point P0(l.direction);
+           P0.shift(l.position);
+           P0.show("P0:");
+           -| P0: (0.0466595, 10.6491, 19.2791)
+           Point P1(-l.direction);
+           P1.shift(l.position);
+           Point P2(P0 - P1);
+           P2 *= 12.5;
+           P2.shift(P0);
+           cout &lt;&lt; P2.is_on_plane(q0);
+           -| 1
+           cout &lt;&lt; P2.is_on_plane(q1);
+           -| 1
+           Point P3(P0 - P1);
+           P3 *= 7;
+           P3.shift(P0);
+           cout &lt;&lt; P3.is_on_plane(q0);
+           -| 1
+           cout &lt;&lt; P3.is_on_plane(q1);
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF108.png"
+ alt="[Figure 108. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 108. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Planes-Showing"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Intersections">Plane Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Plane-Reference">Plane Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">25.7 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = ""</var>])<var><a name="index-show-524"></a></var><br>
+ <blockquote><p>Prints information about the <code>Plane</code> to standard output. 
+ If <var>text</var> is not the empty <code>string</code>, it is printed to the
+ standard output.  Otherwise,
+ &lsquo;<samp><span class="samp">Plane:</span></samp>&rsquo; is printed. 
+ Following this,
+ if the <code>Plane</code> is equal to <code>INVALID_PLANE</code>
+ (see <a href="#Planes-Global-Constants">Planes Reference; Global Constants</a>),
+ a message to this effect is printed to standard output. 
+ Otherwise, <code>normal</code> and
+ <code>point</code> are shown using <code>Point::show()</code>
+ (see <a href="#Showing-Points">Point Reference; Showing</a>).  Finally,
+ <code>distance</code> is printed.
+ 
+      <pre class="example">          Point A(1, 3, 2.5);
+           Rectangle r0(A, 5, 5, 10, 15, 6);
+           Plane p = r0.get_plane();
+           -| p:
+              normal: (-0.0582432, 0.984111, -0.167731)
+              point: (-0.722481, 2.38245, -0.525176)
+              distance == -2.47476
+ </pre>
+         </blockquote></div>
+ 
+ <!-- path.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Path-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Polygon-Reference">Polygon Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Reference">Plane Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">26 Path Reference</h2>
+ 
+ <p><a name="index-Path-525"></a>Class <code>Path</code> is defined in <samp><span class="file">paths.web</span></samp>. 
+ It is derived from <code>Shape</code> using <code>protected</code> derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Path-Data-Members">Path Data Members</a>
+ <li><a accesskey="2" href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Path-Destructor">Path Destructor</a>
+ <li><a accesskey="4" href="#Path-Operators">Path Operators</a>
+ <li><a accesskey="5" href="#Appending-to-Paths">Appending to Paths </a>
+ <li><a accesskey="6" href="#Copying-Paths">Copying Paths</a>
+ <li><a accesskey="7" href="#Clearing-Paths">Clearing Paths </a>
+ <li><a accesskey="8" href="#Modifying-Paths">Modifying Paths </a>
+ <li><a accesskey="9" href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>
+ <li><a href="#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>
+ <li><a href="#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>
+ <li><a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>
+ <li><a href="#Labelling-Paths">Labelling Paths</a>
+ <li><a href="#Showing-Paths">Showing Paths</a>
+ <li><a href="#Querying-Paths">Querying Paths</a>
+ <li><a href="#Outputting-Paths">Outputting Paths</a>
+ <li><a href="#Path-Intersections">Path Intersections</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Path-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Reference">Path Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>line_switch</b><var><a name="index-line_005fswitch-526"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> was created using the constructor
+ <code>Path(const Point&amp; p0, const Point&amp; p1)</code>, directly or indirectly. 
+ See <a href="#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          Point p0;
+           Point p1(1, 1);
+           Point p2(2, 3);
+           Path q0(p0, p1);
+           cout &lt;&lt; q0.get_line_switch();
+           -| 1
+           Path q1;
+           q1 = q0;
+           cout &lt;&lt; q1.get_line_switch();
+           -| 1
+           Path q2 = p0.draw(p1);
+           cout &lt;&lt; q2.get_line_switch();
+           -| 1
+           Path q3("..", false, &amp;p1, &amp;p2, &amp;p0, 0);
+           cout &lt;&lt; q3.get_line_switch();
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF109.png"
+ alt="[Figure 109. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 109. 
+ <br>
+ </p>
+ 
+         <p><a name="index-linear-_0040code_007bPaths_007d-527"></a>Some <code>Path</code> functions only work on <em>linear </em><code>Paths</code>,
+ so it's necessary to be able to distinguish them from non-linear ones. 
+ The function <code>is_linear()</code> should be enough to ensure that all of
+ these functions work, so I plan to make <code>line_switch</code> obsolete
+ soon.  However, at the moment, it's still needed. 
+ See <a href="#Querying-Paths">Path Reference; Querying</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>cycle_switch</b><var><a name="index-cycle_005fswitch-528"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> is cyclical, otherwise
+ <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-529"></a></var><br>
+ <blockquote><p><code>true</code> if the <code>Path</code> was dynamically allocated on the free
+ store.  Otherwise <code>false</code>.  Set to <code>true</code> only in
+ <code>create_new&lt;Path&gt;()</code>, which should be the only way <code>Paths</code> are
+ ever dynamically allocated. 
+ See <a href="#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-530"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Set to <code>false</code> if the <code>Path</code>
+ isn't projectable using the arguments passed to
+ <code>Picture::output()</code>. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: signed short <b>fill_draw_value</b><var><a name="index-fill_005fdraw_005fvalue-531"></a></var><br>
+ <blockquote><p>Set in the drawing and filling functions, and
+ used in <code>Path::output()</code>, to determine what MetaPost code to write
+ to <code>out_stream</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>,
+ and <a href="#Outputting-Paths">Path Reference; Outputting</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: const Color* <b>draw_color</b><var><a name="index-draw_005fcolor-532"></a></var><br>
+ <blockquote><p>Pointer to the <code>Color</code> used if the <code>Path</code> is drawn. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: const Color* <b>fill_color</b><var><a name="index-fill_005fcolor-533"></a></var><br>
+ <blockquote><p>Pointer to the <code>Color</code> used if the <code>Path</code> is filled. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: string <b>dashed</b><var><a name="index-dashed-534"></a></var><br>
+ <blockquote><p>String written to <code>out_stream</code> for the &ldquo;dash pattern&rdquo; in a
+ MetaPost <code>draw</code> or <code>undraw</code> command.  If and only if
+ <code>dashed</code> is not the empty string, &ldquo;<code>dashed</code>
+ &lt;<em>dash pattern</em>&gt;&rdquo; is written to <code>out_stream</code>.
+ 
+         <p>Dash patterns have no meaning inside 3DLDF;  <code>dashed</code>, if
+ non-empty, is written unchanged to <code>out_stream</code>.  I may change this
+ in the future. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: string <b>pen</b><var><a name="index-pen-535"></a></var><br>
+ <blockquote><p>String written to <code>out_stream</code> for the <code>pen</code> to be used in a
+ MetaPost <code>draw</code>, <code>undraw</code>, <code>filldraw</code>, or
+ <code>unfilldraw</code> command.  If and only if <code>pen</code> is not the
+ empty string, &ldquo;<code>withpen</code> &lt;<small class="dots">...</small>&gt;&rdquo; is written to
+ <code>out_stream</code>.
+ 
+         <p>Pens have no meaning inside 3DLDF;  <code>pen</code>, if
+ non-empty, is written unchanged to <code>out_stream</code>.  I may change this
+ in the future. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>arrow</b><var><a name="index-arrow-536"></a></var><br>
+ <blockquote><p>Indicates whether an arrow should be drawn when outputting a
+ <code>Path</code>.  Set to <code>true</code> on a <code>Path</code> created on the free
+ store and put onto a <code>Picture</code> by <code>drawarrow()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-537"></a></var><br>
+ <blockquote><p>Contains the maxima and minima of the x, y, and z-coordinates of the
+ <em>projections</em> of <code>Points</code> on a <code>Path</code> using a particular
+ <code>Focus</code>.  Set in <code>set_extremes()</code> and used in
+ <code>Picture::output()</code> for surface hiding. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: vector&lt;Point*&gt; <b>points</b><var><a name="index-points-538"></a></var><br>
+ <blockquote><p>Pointers to the <code>Points</code> on the <code>Path</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: vector&lt;string&gt; <b>connectors</b><var><a name="index-connectors-539"></a></var><br>
+ <blockquote><p>The connectors between the <code>Points</code> on the <code>Path</code>.  Connectors
+ are simply <code>strings</code> in 3DLDF, they are written unchanged to
+ <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: const Color* <b>help_color</b><var><a name="index-help_005fcolor-540"></a></var><br>
+ <blockquote><p>Pointer to a <code>const Color</code>, which becomes the default for
+ <code>draw_help()</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+         <p>Please note that <code>help_color</code> is a pointer to a
+ <code>const Color</code>, not a <code>const</code> pointer to a <code>Color</code> or a
+ <code>const</code> pointer to a <code>const Color</code>!  It's easy to get confused
+ by the syntax for these types of pointers.<a rel="footnote" href="#fn-35" name="fnd-35"><sup>35</sup></a>
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: string <b>help_dash_pattern</b><var><a name="index-help_005fdash_005fpattern-541"></a></var><br>
+ <blockquote><p>The default dash pattern for <code>draw_help()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static variable: bool <b>do_help_lines</b><var><a name="index-do_005fhelp_005flines-542"></a></var><br>
+ <blockquote><p><code>true</code> if help lines should be output, otherwise <code>false</code>. 
+ If <code>false</code>, a call to <code>draw_help()</code> does not cause a copy of
+ the <code>Path</code> to be created and put onto a <code>Picture</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Path-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Path-Destructor">Path Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Data-Members">Path Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Path</b> (<var>void</var>)<var><a name="index-Path-543"></a></var><br>
+ <blockquote><p>Creates an empty <code>Path</code> with no
+ <code>Points</code> and no connectors. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-Path-544"></a></var><br>
+ <blockquote><p>Creates a line (more precisely, a line segment) between <var>p0</var>
+ and <var>p1</var>.  The single
+ connector between the two <code>Points</code> is set to <code>"--"</code> and the
+ data member <code>line_switch</code> (of type <code>bool</code>) is set to
+ <code>true</code>.  There are certain operations on <code>Paths</code> that are only
+ applicable to lines, so it's necessary to store the information that a
+ <code>Path</code> is a line.<a rel="footnote" href="#fn-36" name="fnd-36"><sup>36</sup></a>
+ 
+      <pre class="example">          Point A(-2, -2.5, -1);
+           Point B(3, 2, 2.5)
+           Path p(A, B);
+           p.show("p:");
+           -| p:
+              (-2, -2.5, -1) -- (3, 2, 2.5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF110.png"
+ alt="[Figure 110. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 110. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-set-545"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+      <pre class="example">          Point P0(1, 2, 3);
+           Point P1(3.5, -12, 75);
+           Path q;
+           q.set(P0, P1);
+           q.show("q:");
+           -| q:
+              (1, 2, 3) -- (3.5, -12, 75);
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>string connector, bool cycle, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-Path-546"></a></var><br>
+ <blockquote><p>For <code>Paths</code> with an arbitrary number of <code>Points</code>
+ and one type of connector.
+ 
+         <p><var>connector</var> is passed unchanged to <code>out_file</code>, so it
+ must be a valid connector in MetaPost.
+ 
+         <p><var>cycle</var> indicates whether the <code>Path</code> is a cycle or not. 
+ <code>cycle_switch</code> is set to <var>cycle</var>. 
+ See <a href="#Path-Data-Members">Path Reference; Data Members</a>. 
+ The filling and unfilling functions
+ only work for
+ <code>Paths</code> that are cycles. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ If a <code>Path</code> is a cycle, it is up to the user to make sure that it
+ has sensible <code>Point</code> and connector values;  3DLDF doesn't check
+ them.  If they are not sensible, for instance, if the <code>Path</code>
+ crosses itself, and you try to fill it, this will cause an error in
+ MetaPost.  It is possible that a <code>Path</code> will be &ldquo;sensible&rdquo; in
+ some projections and not in others, although I have not tested this.
+ 
+         <p><var>p</var> is a pointer to the first <code>Point</code> that should go onto the
+ <code>Path</code>. 
+ The ellipsis points (<code>...</code>) represent an arbitrary number of
+ pointers to <code>Points</code> that should go onto the <code>Path</code>. 
+ The final
+ argument must be <code>0</code>,
+ which is interpreted by the C++
+  compiler as the null
+ pointer.<a rel="footnote" href="#fn-37" name="fnd-37"><sup>37</sup></a>
+ 
+         <p>It is admittedly a bit
+ awkward to have to type &ldquo;<code>&amp;p0</code>&rdquo; rather than &ldquo;<code>p0</code>&rdquo;, and
+ I have frequently forgotten to do it, which causes a compiler error,
+ but all of the arguments must be pointers in order to be able to use 0 to
+ indicate the end of the argument list.  Convenience in typing function
+ calls is not a high priority in 3DLDF, because once I've written
+ an input routine, these function calls should be generated
+ automatically.  It will be more important to define a convenient syntax
+ for the input routine.
+ 
+      <pre class="example">          Point P0;
+           Point P1(2);
+           Point P2(2,2);
+           Point P3(0,2);
+           Path p("..", true, &amp;P0, &amp;P1, &amp;P2, &amp;P3, 0);
+           p.draw();
+           
+           
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF111.png"
+ alt="[Figure 111. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 111. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>string connector, bool cycle, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-set-547"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+      <pre class="example">          Point P[4];
+           P[0].set(2, 1, 3);
+           P[3] = P[2] =  P[1] = P[0];
+           P[3] *= P[2] *=  P[1].rotate(3, 12, 18);
+           P[3] *= P[2].shift(-2, -1, 3);
+           P[3].shear(1.5, .5, 3.5);
+           Path q("...", false, &amp;P[0], &amp;P[1], &amp;P[2], &amp;P[3], 0);
+           q.show("q:");
+           -| q:
+              (2, 1, 3) ... (0.92139, 1.51449, 3.29505) ...
+              (-1.07861, 0.514487, 6.29505) ... (2.84065, -3.26065, 6.29505);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF112.png"
+ alt="[Figure 112. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 112. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Path</b> (<var>Point* first_point_ptr, char* s, Point* p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-Path-548"></a></var><br>
+ <blockquote><p>Constructor for <code>Paths</code> with an arbitrary number of <code>Points</code>
+ and connectors.  The first, required, argument is a pointer to a
+ <code>Point</code>, followed by pointers to <code>char</code> alternating with pointers to
+ <code>Points</code>.<a rel="footnote" href="#fn-38" name="fnd-38"><sup>38</sup></a>
+ The last argument must be 0, i.e., the null pointer.
+ 
+         <p>There is no need to indicate by means of an argument whether the
+ <code>Path</code> is a cycle or not:  If it is, the last argument before the 0
+ will be a <code>char*</code> (pointer to <code>char</code>), if not, it will be a
+ <code>Point*</code>.  The data member <code>cycle_switch</code> (of type
+ <code>bool</code>) will be set to <code>true</code> or <code>false</code> accordingly.
+ 
+      <pre class="example">          Point A;
+           Point B(2, 0);
+           Point C(3, 2);
+           Point D(1, 3);
+           Path p(&amp;A, "..", &amp;B, "..", &amp;C, "--", &amp;D, "...", 0);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF113.png"
+ alt="[Figure 113. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 113. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>Point *first_point_ptr, string s, Point *p, </var>[<var><small class="dots">...</small></var>]<var>, 0</var>)<var><a name="index-set-549"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Path</b> (<var>const Path&amp; p</var>)<var><a name="index-Path-550"></a></var><br>
+ <blockquote><p>Creates a new <code>Path</code>, making it a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Path* <b>create_new&lt;Path&gt;</b> (<var>const Path* p</var>)<var><a name="index-create_005fnew_003cPath_003e-551"></a></var><br>
+ &mdash; : Path* <b>create_new&lt;Path&gt;</b> (<var>const Path&amp; p</var>)<var><a name="index-create_005fnew_003cPath_003e-552"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Paths</code>. 
+ They create a <code>Path</code> on the free store and allocate memory for it using
+ <code>new(Path)</code>.  They return a pointer to the new <code>Path</code>.
+ 
+         <p>If <var>p</var> is a non-zero pointer or a reference,
+ the new <code>Path</code> will be a copy of
+ <var>p</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Path&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information.
+ 
+         <p><code>create_new&lt;Path&gt;()</code> is used in the drawing and filling functions
+ for copying a <code>Path</code> and putting the copy onto a <code>Picture</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Path-Destructor"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Path-Operators">Path Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.3 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Path</b> (<code>void</code>)<var><a name="index-g_t_007ePath-553"></a></var><br>
+ <blockquote><p>All of the <code>Points</code> on a <code>Path</code> are created by
+ <code>create_new&lt;Point&gt;()</code>, which allocates them dynamically on
+ the free store.  Therefore, the destructor calls <code>delete()</code> on all
+ of the pointers on <code>points</code>.  Following this, it calls
+ <code>points.clear()</code> and <code>connectors.clear()</code>. 
+ <code>draw_color</code> and <code>fill_color</code> may or may not have been
+ allocated on the free store, so <code>~Path()</code> checks this first, and
+ deletes them, if they were.  Then, it sets them to 0. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Path-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Appending-to-Paths">Appending to Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Destructor">Path Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-554"></a></var><br>
+ <blockquote><p>Calls <code>Point::operator*=(</code><var>t</var><code>)</code> on each of the <code>Points</code>
+ on the <code>Path</code>. 
+ See <a href="#Point-Operators">Point Reference; Operators</a>. 
+ This has the effect of
+ transforming the entire <code>Path</code> by <var>t</var>.  Please note that
+ <code>Path</code> does not have a <code>transform</code> data member of its own. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator+=</b> (<var>const Point&amp; pt</var>)<var><a name="index-operator_002b_003d-555"></a></var><br>
+ <blockquote><p>Copies <var>pt</var> and pushes a pointer to the copy onto
+ <code>points</code>.  The last connector
+ in the <code>Path</code> will be used to connect the new <code>Point</code> and the
+ previous one.
+ 
+      <pre class="example">          Point A(1, 2, 3);
+           Point B(3, 4, 5);
+           Path q;
+           q += A;
+           q += B;
+           q.show("q:");
+           -| q:
+              (1, 2, 3) -- (3, 4, 5);
+ </pre>
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>operator+</b> (<var>const Point&amp; pt</var>)<var><a name="index-operator_002b-556"></a></var><br>
+ <blockquote><p>Copies the <code>Path</code> and <var>pt</var>, and pushes a pointer to the copy of
+ <var>pt</var> onto <code>points</code> in the new <code>Path</code>.  The
+ last connector in the new <code>Path</code> will be used to connect the new
+ <code>Point</code> and the previous one.  The <code>Path</code> remains unchanged. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator&amp;=</b> (<var>const Path&amp; pa</var>)<var><a name="index-operator_0026_003d-557"></a></var><br>
+ <blockquote><p>Concatenates two <code>Paths</code>.  The result is assigned to <code>*this</code>. 
+ Neither <code>*this</code> nor <var>pa</var> may be cyclical, i.e.,
+ <code>cycle_switch</code> must be <code>false</code> for both <code>Paths</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>operator&amp;</b> (<var>const Path&amp; pa</var>)<var><a name="index-operator_0026-558"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> representing the concatenation of <code>*this</code> and
+ <var>pa</var>.  <code>*this</code> remains unchanged. 
+ Neither <code>*this</code> nor <var>pa</var> may be cyclical, i.e.,
+ <code>cycle_switch</code> must be <code>false</code> for both <code>Paths</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>operator+=</b> (<var>const string s</var>)<var><a name="index-operator_002b_003d-559"></a></var><br>
+ <blockquote><p>Pushes <var>s</var> onto <code>connectors</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Appending-to-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Copying-Paths">Copying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Operators">Path Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.5 Appending</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>append</b> (<var>const Path&amp; pa, </var>[<var>string connector = "&ndash;", </var>[<var>bool assign = </var><code>true</code>]])<var><a name="index-append-560"></a></var><br>
+ <blockquote><p>Appends <var>pa</var> to <code>*this</code> using <var>connector</var> to join them and
+ returns the resulting <code>Path</code>.  If
+ <var>assign</var> == <code>true</code>, then the return value is
+ assigned to <code>*this</code>, otherwise, <code>*this</code> remains unchanged.
+ 
+         <p>If necessary, a <code>const</code> version could be added, for
+ <code>const Paths</code>.
+ 
+      <pre class="example">          Point A(-2, 2);
+           Point B(-2, -2);
+           Point C(2, -2);
+           Point D(2, 2);
+           Path q("--", false, &amp;A, &amp;B, &amp;C, &amp;D, 0);
+           Point E(1, 2);
+           Point F(0, 4);
+           Point G(-.5, 3);
+           Path r("..", false, &amp;E, &amp;F, &amp;G, 0);
+           q.append(r, "..", true);
+           q += "..";
+           q += "--";
+           q.set_cycle();
+           q.show("q:");
+           -| q:
+              (-2, 2, 0) -- (-2, -2, 0) --
+              (2, -2, 0) -- (2, 2, 0) ..
+              (1, 2, 0) .. (0, 4, 0) ..
+              (-0.5, 3, 0) -- cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF114.png"
+ alt="[Figure 114. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 114. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Copying-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Clearing-Paths">Clearing Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Appending-to-Paths">Appending to Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.6 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_copy</b> (<var>void</var>)<var><a name="index-get_005fcopy-561"></a></var><br>
+ <blockquote><p>Creates a copy of the <code>Path</code> using <code>create_new&lt;Path&gt;()</code>, which
+ returns a pointer to <code>Path</code>.  <code>get_copy()</code> then
+ casts this pointer to a pointer to <code>Shape</code> and returns it.
+ 
+         <p>This function is used when copying <code>Pictures</code> and in
+ <code>Solid::output()</code>, where objects of types derived from <code>Shape</code>
+ must be handled in the same way, without their actual types being known. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Clearing-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Modifying-Paths">Modifying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Copying-Paths">Copying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.7 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>clear</b> (<var>void</var>)<var><a name="index-clear-562"></a></var><br>
+ <blockquote><p>Does the same thing the destructor <code>~Path()</code> does:
+ Calls <code>delete()</code> on the pointers to <code>Points</code> on <code>points</code>,
+ clears <code>points</code> and <code>connectors</code>, deletes <code>draw_color</code>
+ and <code>fill_color</code>, if they point to <code>Colors</code> that were
+ allocated on the free store, and sets them to 0.
+ 
+         <p><code>clear()</code> is a pure virtual function in <code>class Shape</code>,
+ so <code>Path</code> must be have a <code>clear()</code> function. 
+ It is needed, because it is sometimes called through a
+ pointer to <code>Shape</code>, so that <code>~Path()</code> cannot be accessed. 
+ At least, so far I haven't found a way to call a destructor through the
+ virtual function facility. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Modifying-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Clearing-Paths">Clearing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.8 Modifying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = </var><code>true</code>])<var><a name="index-set_005fon_005ffree_005fstore-563"></a></var><br>
+ <blockquote><p>Sets <code>on_free_store</code> to <var>b</var>.  This is used in the
+ template function <code>create_new()</code>. 
+ See <a href="#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_fill_draw_value</b> (<var>const signed short s</var>)<var><a name="index-set_005ffill_005fdraw_005fvalue-564"></a></var><br>
+ <blockquote><p>Sets <code>fill_draw_value</code> to <var>s</var>, which should be one of
+ <code>Shape::DRAW</code>, <code>Shape::FILL</code>, <code>Shape::FILLDRAW</code>,
+ <code>Shape::UNDRAW</code>, <code>Shape::UNFILL</code>, or <code>Shape::UNFILLDRAW</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_draw_color</b> (<var>const Color&amp; c</var>)<var><a name="index-set_005fdraw_005fcolor-565"></a></var><br>
+ &mdash; Virtual function: void <b>set_draw_color</b> (<var>const Color * c</var>)<var><a name="index-set_005fdraw_005fcolor-566"></a></var><br>
+ <blockquote><p>Sets <code>draw_color</code> (a pointer to a <code>const Color</code>) to <var>&amp;c</var>
+ or <var>c</var>, depending on whether the
+ version with a reference argument or the version with a pointer argument
+ is used.
+ 
+         <p><code>set_draw_color()</code> is used in the <code>Solid</code> drawing and filling
+ functions, because <code>Path::draw_color</code> is <code>protected</code>, and
+ the <code>Solid</code> cannot access it directly. 
+ See <a href="#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_fill_color</b> (<var>const Color&amp; c</var>)<var><a name="index-set_005ffill_005fcolor-567"></a></var><br>
+ &mdash; Virtual function: void <b>set_fill_color</b> (<var>const Color* c</var>)<var><a name="index-set_005ffill_005fcolor-568"></a></var><br>
+ <blockquote><p>Sets <code>fill_color</code> (a pointer to a <code>const Color</code>) to <var>&amp;c</var>
+ or <var>c</var>, depending on whether the
+ version with a reference argument or the version with a pointer argument
+ is used.
+ 
+         <p><code>set_fill_color()</code> is used in the <code>Solid</code> drawing and filling
+ functions, because
+ <code>Path::fill_color</code> is <code>protected</code>, and
+ the <code>Solid</code> cannot access it directly. 
+ See <a href="#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_dash_pattern</b> ([<var>const string s = ""</var>])<var><a name="index-set_005fdash_005fpattern-569"></a></var><br>
+ <blockquote><p>Sets <code>dashed</code> to <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_pen</b> ([<var>const string s = ""</var>])<var><a name="index-set_005fpen-570"></a></var><br>
+ <blockquote><p>Sets <code>pen</code> to <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>set_connectors</b> ([<var>const string s = ".."</var>])<var><a name="index-set_005fconnectors-571"></a></var><br>
+ <blockquote><p>Clears <code>connectors</code> and then pushes <var>s</var> onto it, making <var>s</var>
+ the only connector.  Additional connectors can be added by using
+ <code>Path::operator+=(const string)</code>. 
+ See <a href="#Path-Operators">Path Reference; Operators</a>.
+ 
+         <p>I plan to add a version of this function taking a vector of
+ <code>strings</code> as its argument, to make it possible to set several
+ connectors at one time. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Modifying-Paths">Modifying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.9 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-572"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.rotate(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-573"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.scale(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>The <code>Points</code> on the <code>Path</code> are scaled according to the
+ arguments:
+ 
+      <pre class="example">          Point pt[8];
+           pt[0] = (-1, -1);
+           for (int i = 1; i &lt; 8; ++i)
+             {
+               pt[i] = pt[0];
+               pt[i].rotate(0, 0, i * 45);
+             }
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3],
+                  &amp;pt[4], &amp;pt[5], &amp;pt[6],
+                  &amp;pt[7], 0);
+           p.draw();
+           p.scale(2, 2);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF115.png"
+ alt="[Figure 115. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 115. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-574"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shear(</code><var>xy</var><code>, </code><var>xz</var><code>, </code><var>yx</var><code>, </code><var>yz</var><code>, </code><var>zx</var><code>, </code><var>zy</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+      <pre class="example">          Point p0;
+           Point p1(1);
+           Point p2(1, 1);
+           Point p3(0, 1);
+           Path q("--", true, &amp;p0, &amp;p1, &amp;p2, &amp;p3, 0);
+           q.rotate(0, 45);
+           q.shift(1);
+           q.filldraw(black, light_gray);
+           q.shear(1.5, 2, 2.5, 3, 3.5, 5);
+           q.filldraw(black, light_gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF116.png"
+ alt="[Figure 116. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 116. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-575"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shift(</code><var>x</var><code>, </code><var>y</var><code>, </code><var>z</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>Shifts each of the <code>Points</code> on the <code>Path</code> according to the
+ arguments.
+ 
+      <pre class="example">          default_focus.set(5, 10, -10, 0, 10, 10, 10);
+           Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.draw();
+           p.shift(3, 3, 3);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF117.png"
+ alt="[Figure 117. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 117. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-576"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.shift(</code><var>p</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>.
+ 
+         <p>This version of <code>shift()</code> uses the x, y, and z-coordinates of the
+ <code>Point</code> <var>p</var> to shift the <code>Path</code>.
+ 
+      <pre class="example">          default_focus.set(5, 10, -10, 0, 10, 10, 10);
+           Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.draw();
+           Point s(1, 1, 1);
+           p.shift(s);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF118.png"
+ alt="[Figure 118. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 118. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-577"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-578"></a></var><br>
+ <blockquote><p>Each of these functions calls the corresponding version of
+ <code>Point::shift_times()</code> on all of the
+ <code>Points</code> on <code>points</code>. 
+ See <a href="#Affine-Transformations-for-Points">Point Reference; Affine Transformations</a>. 
+ The return value is <code>void</code>,
+ because there is no guarantee that all of the <code>Points</code> on a
+ <code>Path</code> will have identical <code>transform</code> members (although it's
+ likely).
+ 
+         <p>Please note that <code>shift_times()</code> will only have an effect on
+ the <code>Points</code> on a <code>Path</code> if it's called <em>after</em> a call to
+ <code>shift()</code> and <em>before</em> an operation is applied that causes
+ <code>Point::apply_transform()</code> to be called. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-579"></a></var><br>
+ <blockquote><p>Creates a <code>Transform t</code> locally and calls
+ <code>t.rotate(</code><var>p0</var><code>, </code><var>p1</var><code>, </code><var>angle</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-580"></a></var><br>
+ <blockquote><p>If <code>p.is_linear()</code> returns <code>true</code>, this function
+ creates a <code>Transform</code> <var>t</var> locally and calls
+ <var>t</var><code>.rotate(</code><var>p</var><code>, </code><var>angle</var><code>)</code>. 
+ <code>t</code> is then applied to all of the <code>Points</code> on <code>points</code>. 
+ The return value is <code>t</code>. 
+ Otherwise, it issues an error message and returns
+ <code>INVALID_TRANSFORM</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Aligning-Paths-with-an-Axis"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.10 Aligning with an Axis</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Transform <b>align_with_axis</b> ([<var>const char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-581"></a></var><br>
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>bool assign, </var>[<var>const char axis = 'z'</var>])<var><a name="index-align_005fwith_005faxis-582"></a></var><br>
+ &mdash; Function: Transform <b>align_with_axis</b> (<var>const Point&amp; p0, const Point&amp; p1, const char axis</var>)<var><a name="index-align_005fwith_005faxis-583"></a></var><br>
+ <blockquote><p>These functions return the <code>Transform</code> which, if applied to the
+ <code>Path</code>, would align it with the major axis indicated by the
+ <var>axis</var> argument.
+ 
+         <p>The first and second versions can only be called
+ for <code>Paths</code> where <code>line_switch</code> is <code>true</code>.  The first
+ version is <code>const</code>, so the <code>Path</code> remains unchanged.  The second
+ version should only be called with <var>assign</var><code> = true</code>, so that the
+ <code>Transform</code> is applied to the <code>Path</code>, actually aligning it with
+ the axis indicated.  If the second version is called with
+ <var>assign</var><code> = false</code>, a warning message is issued to the standard error
+ output (<code>stderr</code>), since one might as well use the first version in
+ this case, but it won't do any harm.  The third version creates a
+ <code>Transform</code> <var>t</var> locally that would align the line from <var>p0</var> to
+ <var>p1</var> with the axis indicated, and applies <var>t</var> to the <code>Path</code>.
+ 
+      <pre class="example">          Point A(2, 3, 2);
+           Point B(-1, 1, 3);
+           Path p(A, B);
+           Transform t = p.align_with_axis(true, 'z');
+           t.show("t:");
+           -| t:
+               -0.316   0.507  -0.802       0
+                    0  -0.845  -0.535       0
+               -0.949  -0.169   0.267       0
+                 2.53    1.86    2.67       1
+           p *= t;
+           p.show("p:");
+           -| p:
+              (2.53, 1.86, 2.67) -- (-1.02, 1.23, 3.67);
+           
+           Point C(1);
+           C *= t.inverse();
+           
+           Path q;
+           q += "..";
+           q += C;
+           
+           for (int i = 0; i &lt; 15; ++i)
+             {
+               C.rotate(A, B, 360.0/16);
+               q += C;
+             }
+           q.set_cycle(true);
+           q.show("q:");
+           -| q:
+              (1.68, 3, 1.05) .. (1.9, 2.68, 1.06) ..
+              (2.13, 2.4, 1.21) .. (2.35, 2.22, 1.48) ..
+              (2.51, 2.15, 1.83) .. (2.59, 2.22, 2.21) ..
+              (2.58, 2.4, 2.55) .. (2.49, 2.68, 2.81) ..
+              (2.32, 3, 2.95) .. (2.1, 3.32, 2.94) ..
+              (1.87, 3.6, 2.79) .. (1.65, 3.78, 2.52) ..
+              (1.49, 3.85, 2.17) .. (1.41, 3.78, 1.79) ..
+              (1.42, 3.6, 1.45) .. (1.51, 3.32, 1.19) .. cycle;
+           q.align_with_axis(A, B, 'z');
+           q.show("q:");
+           -| q:
+              (1, 0, 0) .. (0.924, 0.383, 0) ..
+              (0.707, 0.707, 0) .. (0.383, 0.924, 0) ..
+              (0, 1, 0) .. (-0.383, 0.924, 0) ..
+              (-0.707, 0.707, 0) .. (-0.924, 0.383, 0) ..
+              (-1, 0, 0) .. (-0.924, -0.383, 0) ..
+              (-0.707, -0.707, 0) .. (-0.383, -0.924, 0) ..
+              (0, -1, 0) .. (0.383, -0.924, 0) ..
+              (0.707, -0.707, 0) .. (0.924, -0.383, 0) .. cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF119.png"
+ alt="[Figure 119. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 119. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Applying-Transformations-to-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.11 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>apply_transform</b> (<var>void</var>)<var><a name="index-apply_005ftransform-584"></a></var><br>
+ <blockquote><p>Calls <code>Point::apply_transform()</code> on all of the <code>Points</code> on
+ <code>points</code>. 
+ See <a href="#Applying-Transformations-to-Points">Point Reference; Applying Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Drawing-and-Filling-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Labelling-Paths">Labelling Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Applying-Transformations-to-Paths">Applying Transformations to Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.12 Drawing and Filling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>draw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw-585"></a></var><br>
+ &mdash; <code>const</code> Virtual function: void <b>draw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = *Colors::default_color, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw-586"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ the copy on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>DRAW</code>, and
+ the values of its
+ <code>draw_color</code>, <code>dashed</code>, and <code>pen</code> according to the
+ arguments.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>All of the arguments to <code>draw()</code> are optional, so it can be invoked
+ as follows:
+ 
+      <pre class="example">          Point A;
+           Point B(2);
+           Point C(3, 3);
+           Point D(1, 2);
+           Point E(-1, 1);
+           Path p("..", true, &amp;A, &amp;B, &amp;C, &amp;D, &amp;E, 0);
+           p.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF120.png"
+ alt="[Figure 120. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 120. 
+ <br>
+ </p>
+ 
+         <p>The arguments:
+ 
+           <dl>
+ <dt><var>ddraw_color</var><dd>Used to specify a color for the
+ <code>Path</code>.  <var>ddraw_color</var> is a reference to a <code>Color</code>. 
+ Colors are described in <a href="#Color-Reference">Color Reference</a>.
+ 
+           <p>The most basic <code>Colors</code> are predefined in 3DLDF (in the
+ <code>namespace Colors</code>), and
+ users may create new <code>Colors</code> and specify their red-green-blue
+ values.
+ 
+           <p>The <code>Path p</code> could be drawn in red by calling
+ <code>p.draw(Colors::red)</code>. This manual isn't intended to be printed in
+ color, so there's no figure to demonstrate this.  However, gray values
+ can be printed on non-color printers.
+ 
+           <pre class="example">               using namespace Colors;
+                p.draw(gray, "", "pencircle scaled .25mm");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF121.png"
+ alt="[Figure 121. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 121. 
+ <br>
+ </p>
+ 
+           <br><dt><var>ddashed</var><dd>A <code>string</code> representing a &ldquo;dash pattern&rdquo;, as defined in
+ MetaPost<a rel="footnote" href="#fn-39" name="fnd-39"><sup>39</sup></a>. 
+ Dash patterns have no meaning in 3DLDF, they are simply <code>strings</code>
+ that are written unchanged to <code>out_stream</code>.
+ 
+           <pre class="example">               p.draw(black, "evenly");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF122.png"
+ alt="[Figure 122. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 122. 
+ <br>
+ </p>
+ 
+           <br><dt><var>ppen</var><dd>A <code>string</code> representing a &ldquo;pen&rdquo;, as defined in Metafont and
+ MetaPost<a rel="footnote" href="#fn-40" name="fnd-40"><sup>40</sup></a>. 
+ Pens have no meaning in 3DLDF, they are simply <code>strings</code>
+ that are written unchanged to <code>out_stream</code>.
+ 
+           <pre class="example">               p.draw(black, "", "pensquare xscaled 3mm
+                       yscaled .25mm scaled .5mm");
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF123.png"
+ alt="[Figure 123. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 123. 
+ <br>
+ </p>
+ 
+           <br><dt><var>picture</var><dd>Indicates the <code>Picture</code> on which the <code>Path</code> should be
+ drawn.
+ 
+           <p>The two versions of <code>draw()</code> differ in the position of the
+ <var>picture</var> argument:  In the first version, it's the last argument,
+ while in the second version, it's the first argument.  If a
+ <var>picture</var> argument is used, it's often more convenient to use the second
+ version.
+ 
+           <p>The following example puts <code>Path p</code> onto <code>temp_picture</code>.  It
+ also demonstrates how the labels are put onto <code>temp_picture</code>, and
+ how <code>temp_picture</code> is output.  In
+ the previous examples, the commands for making the labels and outputting
+ <code>current_picture</code> were left out in order to reduce clutter. 
+ See <a href="#Labelling-Points">Point Reference; Labelling</a>, and
+ <a href="#Picture-Output-Functions">Picture Reference; Outputting; Output Functions</a>.
+ 
+           <pre class="example">               Picture temp_picture;
+                p.draw(temp_picture);
+                A.dotlabel("A", "bot", temp_picture);
+                B.dotlabel("B", "bot", temp_picture);
+                C.dotlabel("C", "top", temp_picture);
+                D.dotlabel("D", "top", temp_picture);
+                E.dotlabel("E", "lft", temp_picture);
+                temp_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF124.png"
+ alt="[Figure 124. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 124. 
+ <br>
+ </p>
+ 
+         </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>draw_help</b> ([<var>const Color&amp; ddraw_color = *help_color, </var>[<var>string ddashed = help_dash_pattern, </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fhelp-587"></a></var><br>
+ &mdash; <code>const</code> function: void <b>draw_help</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*help_color</code><var>, </var>[<var>string ddashed = </var><code>help_dash_pattern</code><var>, </var>[<var>string ppen = ""</var>]]])<var><a name="index-draw_005fhelp-588"></a></var><br>
+ <blockquote><p>This functions are for drawing help lines. 
+ They are like <code>draw()</code>, except that <code>draw_help()</code> returns immediately,
+ if <code>do_help_lines</code> (a static data member in
+ <code>Path</code>) is <code>false</code>. 
+ Also, the defaults for <var>ddraw_color</var> and
+ <var>ddashed</var> differ from those for <code>draw()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>drawarrow</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-drawarrow-589"></a></var><br>
+ &mdash; <code>const</code> virtual function: void <b>drawarrow</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-drawarrow-590"></a></var><br>
+ <blockquote><p>Like <code>draw()</code>, except that the MetaPost command <code>drawarrow</code> is
+ written to <code>out_stream</code> when <code>picture</code>
+ is output. 
+ The second version is convenient for passing a <code>Picture</code> argument
+ without having to specify all of the other arguments.
+ 
+      <!-- !! TO DO:  Do something about adding arguments for the size and shape -->
+      <!-- of the arrowhead.  LDF 2003.07.13. -->
+      <pre class="example">          Point m;
+           Point n(2, 2);
+           m.dotlabel("$m$", "bot");
+           n.dotlabel("$n$");
+           m.drawarrow(n);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF125.png"
+ alt="[Figure 125. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 125. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Non-member function: void <b>draw_axes</b> ([<var>real dist = 2.5, </var>[<var>string pos_x = "bot", </var>[<var>string pos_y = "lft", </var>[<var>string pos_z = "bot", </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>const Point&amp; shift_x = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_y = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_z = </var><code>origin</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]]]]]]]])<var><a name="index-draw_005faxes-591"></a></var><br>
+ &mdash; Non-member function: void <b>draw_axes</b> (<var>const Color&amp; ddraw_color, </var>[<var>real dist = 2.5, </var>[<var>string pos_x = "bot", </var>[<var>string pos_y = "lft", </var>[<var>string pos_z = "bot", </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>const Point&amp; shift_x = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_y = </var><code>origin</code><var>, </var>[<var>const Point&amp; shift_z = </var><code>origin</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]]]]]]])<var><a name="index-draw_005faxes-592"></a></var><br>
+ <blockquote><p>These functions draw lines centered on the origin, and ending in arrows in the
+ directions of the positive x,
+ y, and z-axes, and labels them with the appropriate letters. 
+ <code>draw_axes()</code> is used in
+ many of the figures in this handbook.  It can be helpful in determining
+ whether a <code>Focus</code> has a good &ldquo;<code>up</code>&rdquo; direction. 
+ See <a href="#Focus-Data-Members">Focus Reference; Data Members</a>.
+ 
+         <p>In the first version, all of the arguments are optional.  In the second
+ version, <var>ddraw_color</var> is required and has been moved to the front
+ of the argument list.  This version is often convenient, when a
+ <code>Color</code> other than the default is desired.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><var>dist</var><dd>The length of the lines drawn.  The default is 2.5.  The value 0 can be
+ used as a dummy argument, if the default for <var>dist</var> is desired, but
+ other arguments must be specified.
+ 
+           <br><dt><dt><var>pos_x</var><dt><var>pos_y</var><dt><var>pos_z</var><dd>The position arguments for the labelling commands for each of the axes. 
+ The defaults are <code>"bot"</code> for the x and z-axes, and <code>"lft"</code> for
+ the y-axis. 
+ The usual <code>strings</code> for the
+ position of labels can be used,
+ namely: <code>"top"</code>, <code>"bot"</code>, <code>"lft"</code>,
+ <code>"rt"</code>, <code>"ulft"</code>, <code>"urt"</code>, <code>"llft"</code>,
+ <code>"lrt"</code>, and <code>""</code>.  If <code>""</code> is used, that axis is not
+ drawn.  This can be useful for parallel projections onto one of the
+ major planes<a rel="footnote" href="#fn-41" name="fnd-41"><sup>41</sup></a>. 
+ In addition, <code>"d"</code> can be used to indicate that the default should
+ be used for that label.  This can be useful if one needs a placeholder,
+ but doesn't remember what the default is for that label.
+ 
+           <pre class="example">               draw_axes(0, "bot", "rt", "");
+                current_picture.output(Projections::PARALLEL_X_Y);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF126.png"
+ alt="[Figure 126. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 126. 
+ <br>
+ </p>
+ 
+           <p>In addition, the arguments <var>shift_x</var>, <var>shift_y</var>,
+ and <var>shift_z</var> can be used to adjust the positions of the labels
+ further (see below).
+ 
+           <br><dt><var>ddraw_color</var><dt><var>ddashed</var><dt><var>ppen</var><dd>Arguments for the <code>drawarrow()</code> command, described above, in this
+ section.
+ 
+           <br><dt><var>shift_x</var><dt><var>shift_y</var><dt><var>shift_z</var><dd>Offsets for the labels.  These arguments make it possible to adjust the
+ positions of the labels.  The defaults are <code>origin</code>, so no shifting
+ takes place, if they are used.  In [next figure]
+ ,
+ <code>draw_axes</code> is called without any arguments, so the defaults
+ are used.
+ 
+           <pre class="example">               draw_axes();
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF127.png"
+ alt="[Figure 127. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 127. 
+ <br>
+ </p>
+ 
+           <p>In [next figure]
+ , the <code>Point P</code> is used to shift the labels. 
+ Please note that placeholders must be used for the first arguments.
+ 
+           <pre class="example">               Point P(.5, .5, .5);
+                draw_axes(0, "d", "d", "d", black, "", "", P, -P, P);
+ </pre>
+           <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF128.png"
+ alt="[Figure 128. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 128. 
+ <br>
+ </p>
+ 
+           <p>Please note that the <code>Points</code> used for placing the labels are
+ three-dimensional <code>Points</code>, whether the <var>shift_x</var>,
+ <var>shift_y</var>, and/or <var>shift_z</var> arguments are used or not. 
+ It is not currently possible to adjust the positions of the
+ labels on the two-dimensional projection itself.  This would
+ probably be more useful, but would require changing the way
+ <code>Picture::output()</code> functions.
+ 
+           <br><dt><var>picture</var><dd>The <code>Picture</code>, onto which the <code>Paths</code> and <code>Labels</code> are put. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>fill</b> ([<var>const Color&amp; ffill_color = </var><code>*Colors::default_color</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-fill-593"></a></var><br>
+ &mdash; Function: void <b>fill</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::default_color</code>])<var><a name="index-fill-594"></a></var><br>
+ <blockquote>
+         <p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it onto <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>FILL</code>, and
+ its <code>fill_color</code> to <code>*</code><var>ffill_color</var>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>The arguments are similar to those of <code>draw()</code>, except that the
+ <code>Color</code> argument is called <var>ffill_color</var> instead of
+ <var>ddraw_color</var>.
+ 
+      <pre class="example">          p.fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF129.png"
+ alt="[Figure 129. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 129. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>filldraw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-filldraw-595"></a></var><br>
+ &mdash; <code>const</code> function: void <b>filldraw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const Color&amp; ffill_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]]])<var><a name="index-filldraw-596"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ the copy onto <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>FILLDRAW</code>,
+ its <code>draw_color</code> and <code>fill_color</code> to
+ <code>*</code><var>ddraw_color</var> and <code>*</code><var>ffill_color</var>, respectively,
+ its <code>dashed</code> to <var>ddashed</var>, and its <code>pen</code>
+ to <var>ppen</var>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>The arguments are similar to those of <code>draw()</code> and <code>fill()</code>,
+ except that both <var>ddraw_color</var> and <var>ffill_color</var> are used.
+ 
+         <p>3DLDF's <code>filldraw()</code> differs from Metafont's and MetaPost's
+ <code>filldraw</code> commands:  In Metafont and MetaPost, <code>filldrawing</code>
+ is equivalent to filling a <code>path</code> and then drawing its
+ border using the <code>pen</code>. 
+ Metafont does not have colors.  While MetaPost does, its <code>filldraw</code>
+ command does not foresee the use of different colors for drawing and
+ filling.
+ 
+      <pre class="example">          p.filldraw(black, gray, "", "pencircle scaled 2mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF130.png"
+ alt="[Figure 130. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 130. 
+ <br>
+ </p>
+ 
+         <p>It can often be useful to draw the outline of a <code>Path</code>, but to have
+ it hide objects that lie behind it.  This is why the default for
+ <var>ffill_color</var> is <code>*Colors::background_color</code>.
+ 
+      <pre class="example">          default_focus.set(3, 0, -10, 3, 10, 10, 10);
+           Point p[8];
+           p[0] = p[1] = p[2] = p[3] = p[4]
+                = p[5] = p[6] = p[7].set(-1,-1, 5);
+           p[1] *= p[2] *= p[3] *= p[4] *= p[5]
+                *= p[6] *= p[7].rotate(0, 0, 45);
+           p[2] *= p[3] *= p[4]
+                *= p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[3] *= p[4] *= p[5] *= p[6]
+                *= p[7].rotate(0, 0, 45);
+           p[4] *= p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[5] *= p[6] *= p[7].rotate(0, 0, 45);
+           p[6] *= p[7].rotate(0, 0, 45);
+           p[7].rotate(0, 0, 45);
+           Path r0("..", true, &amp;p[0], &amp;p[1], &amp;p[2],
+                   &amp;p[3], &amp;p[4], &amp;p[5], &amp;p[6], &amp;p[7], 0);
+           r0.filldraw(black, light_gray);
+           r0.scale(2, .5);
+           r0.shift(0, 0, -2.5);
+           r0.filldraw(black, gray);
+           r0.scale(.25, 3);
+           r0.shift(0, 0, -2.5);
+           r0.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF131.png"
+ alt="[Figure 131. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 131. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>undraw</b> ([<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-597"></a></var><br>
+ &mdash; Function: void <b>undraw</b> (<var>Picture&amp; picture, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]])<var><a name="index-undraw-598"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>UNDRAW</code>, and
+ the values of its
+ <code>dashed</code> and <code>pen</code> according to the
+ arguments.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>This function &ldquo;undraws&rdquo; a <code>Path</code>.  This is equivalent to drawing
+ the <code>Path</code> using the background color
+ (<code>*Colors::background_color</code>).
+ 
+         <p>Undrawing is useful for removing a portion of a <code>Path</code>.
+ 
+      <!-- Make this illustration a letter.  LDF 2003.07.16. -->
+      <pre class="example">          Point P0(1, 1);
+           Point P1(2, 1);
+           Point P2(2, 3);
+           Point P3(-1, 1);
+           Path p("--", false, &amp;origin, &amp;P0, &amp;P1, &amp;P2, &amp;P3, 0);
+           p.draw(black, "", "pencircle scaled 3mm");
+           p.undraw("", "pencircle scaled 1mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF132.png"
+ alt="[Figure 132. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 132. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>unfill</b> ([<var>Picture&amp; picture = </var><code>current_picture</code>])<var><a name="index-unfill-599"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code> and sets
+ its <code>fill_draw_value</code> to <code>UNFILL</code>
+ 
+         <p>This function is useful for removing a portion of a filled region.
+ 
+      <pre class="example">          Point pt[4];
+           pt[0].set(-2, -2);
+           pt[1].set(2, -2);
+           pt[2].set(2, 2);
+           pt[3].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2], &amp;pt[3], 0);
+           p.draw();
+           p.dotlabel();
+           p.filldraw(black, gray);
+           p.scale(.5, .5);
+           p.unfill();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF133.png"
+ alt="[Figure 133. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 133. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>unfilldraw</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = current_picture</var>]]]])<var><a name="index-unfilldraw-600"></a></var><br>
+ &mdash; Function: void <b>unfilldraw</b> (<var>Picture&amp; picture, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::background_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = ""</var>]]])<var><a name="index-unfilldraw-601"></a></var><br>
+ <blockquote><p>Allocates a copy of the <code>Path</code> on the free store, puts a pointer to
+ it on <var>picture</var>.<code>shapes</code>, sets
+ its <code>fill_draw_value</code> to <code>UNFILLDRAW</code>, and
+ the values of its
+ <code>draw_color</code>, <code>dashed</code>, and <code>pen</code> according to the
+ arguments.  While the default for <var>ddraw_color</var> is
+ <code>*Colors::background_color</code>, any other <code>Color</code> can be used,
+ so that <code>unfilldraw()</code> can unfill a <code>Path</code> and draw an outline
+ around it.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments.
+ 
+         <p>This function is similar to <code>unfill()</code>
+ (see <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>),
+ except that the outline of the <code>Path</code> will be &ldquo;undrawn&rdquo; using the
+ pen specified with the <var>ppen</var> argument, or MetaPost's
+ <code>currentpen</code>, if no <var>ppen</var> argument is specified.  In addition,
+ the <code>Path</code> will be drawn using the <code>Color</code> specified in the
+ <var>ddraw_color</var> argument.  Since the default is
+ <code>*Colors::background_color</code>, the <code>Path</code> will be &ldquo;undrawn&rdquo;
+ unless a different <code>Color</code> is specified.
+ 
+      <pre class="example">          Point pt[6];
+           pt[0].set(-2, -2);
+           pt[1].set(0, -3);
+           pt[2].set(2, -2);
+           pt[3].set(2, 2);
+           pt[4].set(0, 3);
+           pt[5].set(-2, 2);
+           Path p("--", true, &amp;pt[0], &amp;pt[1], &amp;pt[2],
+                  &amp;pt[3], &amp;pt[4], &amp;pt[5], 0);
+           p.fill(gray);
+           p.scale(.5, .5);
+           p.unfilldraw(black, "", "pensquare xscaled 3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF134.png"
+ alt="[Figure 134. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 134. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Labelling-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Paths">Showing Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.13 Labelling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> ([<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, </var>[<var>bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-label-602"></a></var><br>
+ &mdash; <code>const</code> function: void <b>label</b> (<var>Picture&amp; picture, </var>[<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, </var>[<var>bool dot = </var><code>false</code>]]]])<var><a name="index-label-603"></a></var><br>
+ <blockquote><p>Calls <code>Point::label()</code> on all of the <code>Points</code> on
+ <code>points</code>.  They are numbered consecutively starting with <var>i</var>. 
+ The other arguments are used for all of the <code>Points</code>, so it's not
+ possible to specify different positions for the labels for different
+ <code>Points</code>.  <var>dot</var> will normally not be specified, unless a
+ <var>picture</var> argument is used in the first version.  <code>dotlabel()</code>
+ calls <code>label()</code> with <var>dot</var> = <code>true</code>.
+ 
+         <p>The second version is convenient for passing a
+ <code>Picture</code> argument without having to specify all of the other arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>dotlabel</b> ([<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0, Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-dotlabel-604"></a></var><br>
+ &mdash; <code>const</code> function: void <b>dotlabel</b> (<var>Picture&amp; picture, </var>[<var>unsigned int i = 0, </var>[<var>string position_string = "top", </var>[<var>short text_short = 0</var>]]])<var><a name="index-dotlabel-605"></a></var><br>
+ <blockquote><p>Like <code>label()</code>, except that the <code>Points</code> are dotted. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Paths">Querying Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Labelling-Paths">Labelling Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.14 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-606"></a></var><br>
+ <blockquote><p>Prints information about the <code>Path</code> to standard output
+ (<code>stdout</code>).  <var>text</var> is simply printed out, unless it's the
+ empty string, in which case <code>"Path:"</code> is printed out. 
+ <var>coords</var> indicates which set of coordinates should be shown.  Valid values are
+ <code>'w'</code> for the <code>world_coordinates</code>, <code>'p'</code> for the
+ <code>projective_coordinates</code>, <code>'u'</code> for the
+ <code>user_coordinates</code>, and <code>'v'</code> for the <code>view_coordinates</code>,
+ whereby the latter two are currently not in use
+ (see <a href="#Point-Data-Members">Point Reference; Data Members</a>). 
+ If <var>do_apply</var> is <code>true</code>, <code>apply_transform()</code> is called
+ on each <code>Point</code>, updating its <code>world_coordinates</code> and
+ resetting its <code>transform</code>.  Otherwise,
+ it's not. 
+ The arguments <var>do_persp</var>, <var>f</var>, <var>proj</var>, and <var>factor</var> are only
+ relevant when showing <code>projective_coordinates</code>.  If <code>do_persp</code>
+ is <code>true</code>, the <code>Points</code> are projected using the values of
+ <var>f</var>, <var>proj</var>, and <var>factor</var>
+ (see <a href="#Outputting-Paths">Path Reference; Outputting</a>). 
+ Otherwise, the values currently
+ stored in <code>projective_coordinates</code> are shown. 
+ The <code>Points</code> and connectors are printed out alternately to standard
+ output, followed by the word &ldquo;cycle&rdquo;, if <code>cycle_switch = true</code>.<a rel="footnote" href="#fn-42" name="fnd-42"><sup>42</sup></a>
+ 
+      <pre class="example">          default_focus.set(0, 3, -10, 0, 3, 10, 10);
+           Reg_Polygon r(origin, 5, 3, 45);
+           r.fill(gray);
+           Point p[10];
+           for (int i = 0; i &lt; 5; ++i)
+               p[i] = r.get_point(i);
+           p[5] = Point::intersection_point(p[4], p[0], p[2], p[1]).pt;
+           p[6] = Point::intersection_point(p[0], p[1], p[2], p[3]).pt;
+           p[7] = Point::intersection_point(p[1], p[2], p[4], p[3]).pt;
+           p[8] = Point::intersection_point(p[2], p[3], p[0], p[4]).pt;
+           p[9] = Point::intersection_point(p[3], p[4], p[0], p[1]).pt;
+           Path q("--", true, &amp;p[0], &amp;p[5], &amp;p[1], &amp;p[6], &amp;p[2], &amp;p[7],
+                  &amp;p[3], &amp;p[8], &amp;p[4], &amp;p[9], 0);
+           q.draw();
+           q.show("q:");
+           -| q:
+           fill_draw_value == 0
+           (0, 1.06066, 1.06066)
+           -- (-2.30826, 2.24651, 2.24651)
+           -- (-1.42658, 0.327762, 0.327762)
+           -- (-3.73485, -0.858092, -0.858092)
+           -- (-0.881678, -0.858092, -0.858092)
+           -- (4.92996e-07, -2.77684, -2.77684)
+           -- (0.881678, -0.858092, -0.858092)
+           -- (3.73485, -0.858092, -0.858092)
+           -- (1.42658, 0.327762, 0.327762)
+           -- (2.30826, 2.24651, 2.24651) -- cycle;
+           q.show("q:", 'p');
+           -| q:
+           fill_draw_value == 0
+           Projective coordinates.
+           (0, -1.75337, 0.0958948)
+           -- (-1.88483, -0.615265, 0.183441)
+           -- (-1.38131, -2.58743, 0.031736)
+           -- (-4.08541, -4.22023, -0.0938636)
+           -- (-0.964435, -4.22023, -0.0938636)
+           -- (0, -7.99767, -0.384436)
+           -- (0.964436, -4.22023, -0.0938636)
+           -- (4.08541, -4.22023, -0.0938636)
+           -- (1.38131, -2.58743, 0.031736)
+           -- (1.88483, -0.615266, 0.183441) -- cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF135.png"
+ alt="[Figure 135. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 135. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>show_colors</b> ([<var>bool  = </var><code>false</code>])<var><a name="index-show_005fcolors-607"></a></var><br>
+ <blockquote><p>Shows the values of <code>draw_color</code> and <code>fill_color</code>.  These will
+ normally be 0, unless the <code>Path</code> is on a <code>Picture</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Paths">Outputting Paths</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Paths">Showing Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.15 Querying</h3>
+ 
+ <!-- !! ADD EXAMPLES to the function descriptions in this section. -->
+ <!-- LDF 2003.07.16. -->
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_on_free_store</b> (<var>void</var>)<var><a name="index-is_005fon_005ffree_005fstore-608"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Path</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool <b>is_planar</b> ([<var>const bool verbose = </var><code>false</code><var>, </var>[<var>string text = ""</var>]])<var><a name="index-is_005fplanar-609"></a></var><br>
+ <blockquote><p>Uses <code>get_normal()</code> to determine
+ whether the <code>Path</code> is planar or not.  Returns <code>true</code>, if it is,
+ otherwise <code>false</code>.  If <var>verbose</var> is <code>true</code>, <var>text</var> is written to
+ standard output, or &ldquo;Path:&rdquo;, if <var>text</var> is the empty string,
+ followed by a message saying whether the <code>Path</code> is planar or not. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_linear</b> ([<var>const bool verbose = </var><code>false</code><var>, </var>[<var>string text = ""</var>]])<var><a name="index-is_005flinear-610"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if <code>line_switch</code> is <code>true</code>.  Otherwise,
+ <code>is_linear()</code> uses <code>get_normal()</code> to determine whether the
+ <code>Path</code> is linear.  If it is, <code>is_linear()</code> returns
+ <code>true</code>, otherwise <code>false</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>is_cycle</b> (<var>void</var>)<var><a name="index-is_005fcycle-611"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Path</code> is cyclical, i.e.,
+ <code>cycle_switch = true</code>, otherwise <code>false</code>.  Only cyclical
+ <code>Paths</code> are fillable. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: int <b>size</b> (<var>void</var>)<var><a name="index-size-612"></a></var><br>
+ <blockquote><p>Returns the number of <code>Points</code> on <code>points</code>, i.e.,
+ <code>points.size()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>get_line_switch</b> (<var>void</var>)<var><a name="index-get_005fline_005fswitch-613"></a></var><br>
+ <blockquote><p>Returns the value of <code>line_switch</code>.  <code>line_switch</code> is only
+ true, if the <code>Path</code> was created, directly or indirectly, using the
+ constructor taking two <code>Point</code> arguments only. 
+ See <a href="#Path-Constructors-and-Setting-Functions">Path Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>slope</b> ([<var>char a = 'x', </var>[<var>char b = 'y'</var>]])<var><a name="index-slope-614"></a></var><br>
+ <blockquote><p>Returns the slope of the <code>Path</code> in the plane indicated by the
+ arguments, if <code>is_linear()</code> returns <code>true</code>.  Otherwise,
+ <code>slope()</code> issues an error message and returns <code>INVALID_REAL</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>subpath</b> (<var>size_t start, size_t end, </var>[<var>const bool cycle = false, </var>[<var>const string connector = ""</var>]])<var><a name="index-subpath-615"></a></var><br>
+ <blockquote><p>Returns a new <code>Path</code> using <code>points[</code><var>start</var><code>]</code> through
+ <code>points[</code><var>end</var><code> - 1]</code>.  If <var>cycle</var> is <code>true</code>, then the new
+ <code>Path</code> will be a cycle, whether
+ <code>*this</code> is or not.  One optional connector
+ argument can be used.  If it is, it will be the only connector. 
+ Otherwise, the appropriate connectors from <code>*this</code> are used.
+ 
+         <p><var>start</var> must be &lt; <var>end</var>.  It is not possible to
+ have <var>start</var> &gt; <var>end</var>, even if <code>*this</code> is a cycle. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: const Point&amp; <b>get_point</b> (<var>const unsigned short a</var>)<var><a name="index-get_005fpoint-616"></a></var><br>
+ <blockquote><p>Returns the <code>Point</code> <code>*points[</code><var>a</var><code>]</code>, if <var>a</var> &lt;
+ <code>points.size()</code> and the <code>Path</code> is non-empty, otherwise
+ <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: const Point&amp; <b>get_last_point</b> (<var>void</var>)<var><a name="index-get_005flast_005fpoint-617"></a></var><br>
+ <blockquote><p>Returns the <code>Point</code> pointed to by the last pointer on <code>points</code>. 
+ Equivalent to  <code>get_point(get_size() - 1)</code>, but more convenient to
+ type.  Returns <code>INVALID_POINT</code>, if the <code>Path</code> is empty. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: size_t <b>get_size</b> (<var>void</var>)<var><a name="index-get_005fsize-618"></a></var><br>
+ <blockquote><p>Returns <code>points.size()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Line <b>get_line</b> (<var>void</var>)<var><a name="index-get_005fline-619"></a></var><br>
+ <blockquote><p>Returns a <code>Line</code> corresponding to the <code>Path</code>, if the latter is
+ linear.  Otherwise, <code>INVALID_LINE</code> is returned. 
+ See <a href="#Line-Reference">Line Reference</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Point <b>get_normal</b> (<var>void</var>)<var><a name="index-get_005fnormal-620"></a></var><br>
+ <blockquote><p>Returns a <code>Point</code> representing a unit vector in the direction of the
+ normal to the plane of the <code>Path</code>, or <code>INVALID_POINT</code>, if
+ the <code>Path</code> is non-planar.
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 30, 30, 30);
+           Point N = r.get_normal();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF136.png"
+ alt="[Figure 136. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 136. 
+ <br>
+ </p>
+ 
+         <p>In 3DLDF, plane figures generally have constructors taking a |Point|
+ argument for the center, a variable number of |real| arguments for the
+ dimensions, and three |real| arguments for the rotation about the major
+ axes.  The object is first created in the x-z plane, and the
+ <code>Points</code> are generated to be traversed in the counter-clockwise
+ direction, when seen from a <code>Point</code> with a positive y-coordinate. 
+ If no rotation is specified, the normal will point in the direction of
+ the positive y-axis.  If non-zero arguments are used for rotation, the
+ normal will be rotated accordingly.  This direction considered to be
+ &ldquo;outside&rdquo;.  However, according to Huw
+ Jones, <cite>Computer Graphics Through Key Mathematics</cite>, p. 197,
+ &ldquo;outside&rdquo; is considered to be the side of a plane, where the
+ <code>Points</code> are meant to be traversed in the clockwise direction. 
+ I hope that no problems arise from this discrepancy! 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Plane <b>get_plane</b> (<var>void</var>)<var><a name="index-get_005fplane-621"></a></var><br>
+ <blockquote><p>Creates and returns a <code>Plane</code> <var>p</var> corresponding to the <code>Path</code>,
+ if the latter is planar, otherwise <code>INVALID_PLANE</code>. 
+ If the <code>Path</code> is planar, <var>p</var>.<code>point</code> will be the
+ <code>Point</code> pointed to by <code>this-&gt;points[0]</code>. 
+ See <a href="#Plane-Reference">Plane Reference</a>.
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Rectangle r(P, 4, 4, 45, 20, 15);
+           Plane q = r.get_plane();
+           q.show("q:");
+           -| q:
+              normal: (0.0505914, 0.745607, -0.664463)
+              point: (0.0178869, -0.727258, -1.01297)
+              distance == -0.131735
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF137.png"
+ alt="[Figure 137. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 137. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>set_cycle</b> ([<var>const bool c = </var><code>true</code>])<var><a name="index-set_005fcycle-622"></a></var><br>
+ <blockquote><p>Sets <code>cycle_switch</code> to <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: Path <b>reverse</b> (<var>bool assign</var>)<var><a name="index-reverse-623"></a></var><br>
+ &mdash; <code>const</code> function: Path <b>reverse</b> (<var>void</var>)<var><a name="index-reverse-624"></a></var><br>
+ <blockquote><p>These functions return a <code>Path</code> with the same <code>Points</code> and
+ connectors as <code>*this</code>, but in reversed order. 
+ <code>reverse()</code> can only be applied to non-cyclical <code>Paths</code>.  If
+ <code>*this</code> is a cycle, <code>reverse()</code> issues an error message and
+ returns <code>*this</code> unreversed.
+ 
+         <p>If the first version is called with <var>assign</var> = <code>true</code>,
+ <code>*this</code> itself is reversed.  If <code>*this</code> should remain
+ unchanged, the <code>const</code> version without an argument should be
+ called.  If, on the other hand, the first version is called with
+ <var>assign</var> = <code>false</code>, a warning message is issued, but the
+ reversed <code>Path</code> is returned just the same, leaving <code>*this</code>
+ unchanged.
+ 
+      <!-- !! ADD EXAMPLE.  LDF 2003.07.16. -->
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Paths"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Path-Intersections">Path Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Paths">Querying Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.16 Outputting</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool <b>project</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-project-625"></a></var><br>
+ <blockquote><p>Calls <code>Point::project(</code><var>f</var><code>, </code><var>proj</var><code>, </code><var>factor</var><code>)</code> on the
+ <code>Points</code> on the <code>Path</code>. 
+ If <code>Point::project()</code> fails (i.e., returns <code>false</code>), for any of
+ the <code>Points</code>, this function
+ returns <code>false</code>.  Otherwise, it returns <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-626"></a></var><br>
+ <blockquote><p>Checks that the <code>Points</code> on <code>points</code> can be projected using
+ the values for <var>f</var>, <var>proj</var>, and <var>factor</var>.  If they can, a
+ <code>vector&lt;Shape*&gt;</code> containing only <code>this</code> is returned.  Called in
+ <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<var>void</var>)<var><a name="index-set_005fextremes-627"></a></var><br>
+ <blockquote><p>Sets the appropriate elements in <code>projective_extremes</code> to the
+ minimum and maximum values of the x, y, and z-coordinates of
+ the <code>Points</code> on the <code>Path</code>.  Used in <code>Picture::output()</code>
+ for determining whether a <code>Path</code> can be output using the arguments
+ passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<var>void</var>)<var><a name="index-get_005fextremes-628"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>.  Used in <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: real <b>get_minimum_z</b> (<var>void</var>)<var><a name="index-get_005fminimum_005fz-629"></a></var><br>
+ &mdash; <code>const</code> virtual function: real <b>get_mean_z</b> (<var>void</var>)<var><a name="index-get_005fmean_005fz-630"></a></var><br>
+ &mdash; <code>const</code> virtual function: real <b>get_maximum_z</b> (<var>void</var>)<var><a name="index-get_005fmaximum_005fz-631"></a></var><br>
+ <blockquote><p>These functions return the minimum, mean, or maximum value,
+ respectively, of the
+ z-coordinates of the <code>Points</code> on the <code>Path</code>. 
+ Used in the surface hiding algorithm in <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<var>void</var>)<var><a name="index-suppress_005foutput-632"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>. 
+ Sets <code>do_output</code> to
+ <code>false</code>, if the <code>Path</code> cannot  be output using the arguments
+ passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>unsuppress_output</b> (<var>void</var>)<var><a name="index-unsuppress_005foutput-633"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  Resets <code>do_output</code> to
+ <code>true</code> after <code>output()</code> is called on the <code>Shapes</code> on
+ <code>shapes</code> in a <code>Picture</code>, so that the <code>Path</code> can be output
+ if <code>Picture::output()</code> is called again, with arguments that allow
+ the <code>Path</code> to be output. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>output</b> (<var>void</var>)<var><a name="index-output-634"></a></var><br>
+ <blockquote><p>Called in <code>Picture::output()</code>.  Writes the MetaPost code to
+ <code>out_stream</code> for drawing, filling, filldrawing, undrawing,
+ unfilling, or unfilldrawing the <code>Path</code>, if the latter was
+ projectable using the arguments passed to <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Path-Intersections"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Outputting-Paths">Outputting Paths</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Path-Reference">Path Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">26.17 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Function: bool_point <b>intersection_point</b> (<var>const Path&amp; p, const bool trace</var>)<var><a name="index-intersection_005fpoint-635"></a></var><br>
+ <blockquote><p>Finds the intersection point, if any, of two linear <code>Paths</code>. 
+ Let <code>bp</code> be the <code>bool_point</code> returned by
+ this function.  <code>bp.pt</code> will contains the
+ intersection point, if it exists.  If not, it will contain
+ <code>INVALID_POINT</code>.  If the intersection point exists and lies on both
+ of the line segments represented by the <code>Path</code> and <code>p</code>,
+ <code>bp.b</code> will be <code>true</code>, otherwise, <code>false</code>.
+ 
+         <p>This function calls <code>Point::intersection_points()</code>, passing the first
+ and last <code>Points</code> on <code>*this</code> and <var>p</var> as its arguments.  If
+ the <var>trace</var> argument is <code>false</code>, the version of
+ <code>Point::intersection_points()</code> that finds the intersection point by
+ means of a vector calculation is used.  If it's <code>true</code>, the version
+ that finds the intersection point of the traces of the lines on the
+ major planes is used. 
+ See <a href="#Point-Intersections">Point Reference; Intersections</a>.
+ 
+      <pre class="example">          Point A(-1, -1, -1);
+           Point B(1, 1, 1);
+           Path p0(A, B);
+           Point C(-2, 1, 1);
+           Point D(1.75, 0.25, 0.25);
+           Path p1(C, D);
+           bool_point bp = p0.intersection_point(p1);
+           bp.pt.dotlabel("$i$");
+           bp.pt.show("bp.pt:");
+           -| bp.pt: (0.5, 0.5, 0.5)
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF138.png"
+ alt="[Figure 138. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 138. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- polygon.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Polygon-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Path-Reference">Path Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">27 Polygon Reference</h2>
+ 
+ <p><a name="index-Polygon-636"></a>Class <code>Polygon</code> is defined in <samp><span class="file">polygons.web</span></samp>, and
+ is derived from <code>Path</code>, using public derivation.
+ 
+    <p><code>Polygon</code> is mainly intended for use as a base class for more
+ specialized kinds of polygons.  Currently, the classes
+ <code>Reg_Polygon</code> (regular polygon) and <code>Rectangle</code> are defined. 
+ See <a href="#Regular-Polygon-Reference">Regular Polygon Reference</a>, and <a href="#Rectangle-Reference">Rectangle Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Polygon-Data-Members">Polygon Data Members</a>
+ <li><a accesskey="2" href="#Polygon-Operators">Polygon Operators</a>
+ <li><a accesskey="3" href="#Querying-Polygons">Querying Polygons</a>
+ <li><a accesskey="4" href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>
+ <li><a accesskey="5" href="#Polygon-Intersections">Polygon Intersections</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Polygon-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Polygon-Operators">Polygon Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polygon-Reference">Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polygon-Reference">Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">27.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: Point <b>center</b><var><a name="index-center-637"></a></var><br>
+ <blockquote><p>The center of the <code>Polygon</code>, if it has one.  However, a
+ <code>Polygon</code> need not have a <code>center</code>.  If it doesn't,
+ <code>center</code> should be set to <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Polygon-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Polygons">Querying Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polygon-Data-Members">Polygon Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polygon-Reference">Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">27.2 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual operator: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-638"></a></var><br>
+ <blockquote><p>Multiplies a <code>Polygon</code> by the <code>Transform</code> <var>t</var>. 
+ Similar to <code>Path::operator*=(const Transform&amp; t)</code>, except that
+ <code>center</code> is transformed as well. 
+ See <a href="#Path-Operators">Path Reference; Operators</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Polygons"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polygon-Operators">Polygon Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polygon-Reference">Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">27.3 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: const Point&amp; <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-639"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-640"></a></var><br>
+ <blockquote><p>These functions return <code>center</code>.  If the <code>Polygon</code> doesn't
+ contain any <code>Points</code>, a warning is issued, and <code>INVALID_POINT</code>
+ is returned. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Polygons"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Polygon-Intersections">Polygon Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Polygons">Querying Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polygon-Reference">Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">27.4 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-641"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-642"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-643"></a></var><br>
+ &mdash; Virtual function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-644"></a></var><br>
+ &mdash; Virtual function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-645"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-646"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-647"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-648"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-649"></a></var><br>
+ <blockquote><p>The affine transformation functions for <code>Polygon</code> differ from the
+ <code>Path</code> versions only in that <code>center</code> is transformed as well. 
+ See <a href="#Affine-Transformations-for-Paths">Path Reference; Affine Transformations</a>.
+ 
+         <p>Please note, that the classes currently derived from <code>Polygon</code>,
+ namely <code>Reg_Polygon</code> and <code>Rectangle</code>, currently inherit these
+ functions from <code>Polygon</code>.  The problem with this is, that they have
+ data members, which are not recalculated when a <code>Reg_Polygon</code> or
+ <code>Rectangle</code> is transformed.  I plan to do something about this soon! 
+ It will also be necessary to add the function
+ <code>Reg_Polygon::is_reg_polygonal()</code>, in order to test whether operations
+ on a <code>Reg_Polygon</code> have caused it to become
+ irregular and/or non-polygonal.  Similarly, the function
+ <code>Rectangle::is_rectangular()</code> must be added, to test whether
+ operations on a <code>Rectangle</code> has caused it to become
+ non-rectangular. 
+ See <a href="#Regular-Polygon-Data-Members">Regular Polygon Reference; Data Members</a>, and <a href="#Rectangle-Data-Members">Rectangle Reference; Data Members</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Polygon-Intersections"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polygon-Reference">Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">27.5 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoints-650"></a></var><br>
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-651"></a></var><br>
+ <blockquote><p>These functions find the intersections of the
+ <code>Polygon</code> and a line. 
+ In the first version, the <code>Point</code> arguments are the end points of
+ the line.  The argument to the second version must be a linear
+ <code>Path</code>.
+ 
+         <p>A line and a regular polygon or rectangle<a rel="footnote" href="#fn-43" name="fnd-43"><sup>43</sup></a>
+ can intersect at two points at most. 
+ Let <code>b</code> be a <code>bool_point_pair</code> returned by
+ <code>intersection_points()</code>. 
+ If no
+ intersection points are found, <code>b.first.pt</code> and <code>b.second.pt</code>
+ will be <code>INVALID_POINT</code>, and <code>b.first.b</code> and <code>b.second.b</code>
+ will be <code>false</code>.  If a single intersection point is found, the
+ corresponding <code>Point</code> will be stored in <code>b.first.pt</code>.  If the
+ <code>Point</code> is on the line segment
+ p_0p_1
+ ,
+ <code>b.first.b</code> will be <code>true</code>,
+ otherwise <code>false</code>.  If a second intersection point is found, it
+ will be stored in <code>b.second.pt</code>, and <code>b.second.b</code> is set
+ analogously to <code>b.first.b</code>.
+ 
+         <p>When the <code>Point</code> arguments and the <code>Reg_Polygon</code> are coplanar,
+ as in [next figure]
+ , two intersection points are possible.  In this case,
+ only intersection points of the line with an edge of the
+ <code>Reg_Polygon</code> are returned in the <code>bool_point_pair</code>.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Reg_Polygon r(origin, 5, 3);
+           Transform t;
+           t.rotate(15, 12, 11);
+           t.shift(A);
+           Point P(-2, 0, -1);
+           Point Q(2, 0, 1);
+           P *= Q *= r *= t;
+           bool_point_pair bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$f$", "rt");
+           bpp.second.pt.dotlabel("$s$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF139.png"
+ alt="[Figure 139. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 139. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the lines BC
+  and
+ PQ
+ 
+         <p>are not coplanar with the <code>Reg_Polygon</code> r.  In each case, only
+ one intersection point is possible, and it can be either an intersection
+ with an edge of the
+ <code>Reg_Polygon</code>, or lie within its perimeter.
+ 
+      <pre class="example">          Point B(r.get_point(3).mediate(r.get_point(4)));
+           Point C(B);
+           B.shift(0, 2, .5);
+           C.shift(0, -2, -.5);
+           Point P(-1, -2, -1);
+           Point Q(0, 2, 1);
+           B *= C *= P *= Q *= r *= t;
+           bool_point_pair bpp = r.intersection_points(B, C);
+           bpp.first.pt.dotlabel("$i_0$", "rt");
+           bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$i_1$", "rt");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF140.png"
+ alt="[Figure 140. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 140. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the intersection point of r with the line
+ PQ
+ 
+         <p>does not lie on the line <em>segment</em> PQ.
+ 
+      <pre class="example">          bpp = r.intersection_points(P, Q);
+           bpp.first.pt.dotlabel("$i$", "rt");
+           cout &lt;&lt; "bpp.first.b == " &lt;&lt; bpp.first.b &lt;&lt; endl &lt;&lt; flush;
+           -| bpp.first.b == 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF141.png"
+ alt="[Figure 141. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 141. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: vector&lt;Point&gt; <b>intersection_points</b> (<var>const Polygon&amp; r</var>)<var><a name="index-intersection_005fpoints-652"></a></var><br>
+ <blockquote><p>Finds the intersection points of two <code>Polygons</code>. 
+ Let v be the <code>vector&lt;Point&gt;</code> returned by
+ <code>intersection_points()</code>.  If the <code>Polygons</code> are coplanar,
+ v
+ will contain the intersection points of the edges of the
+ <code>Polygons</code>, as in [next figure]
+ .
+ 
+      <pre class="example">          Rectangle r(origin, 4, 4);
+           Reg_Polygon rp(origin, 5, 5, 0, 36);
+           rp.shift(0, 0, .25);
+           vector &lt;Point&gt; v = r.intersection_points(rp);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF142.png"
+ alt="[Figure 142. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 142. 
+ <br>
+ </p>
+ 
+         <p>If the <code>Polygons</code> lie in parallel planes, there can be no
+ intersection points.  If they lie in non-parallel, non-coplanar planes,
+ <code>intersection_points()</code> first finds the intersection line of the
+ two planes.  Then it finds the intersection points of this line with the
+ two <code>Polygons</code>, if they exist.  There can no more than four
+ intersection points, in this case. 
+ v[0] and v[1] will be the
+ intersection points of the line with <code>*this</code>, while v[2] and
+ v[3] will be the intersection points of the line with <var>r</var>.  If one
+ or more of the intersection points doesn't exist, the corresponding
+ member of v will contain <code>INVALID_POINT</code> as a placeholder.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Rectangle r(A, 4, 4);
+           Reg_Polygon p(A, 5, 5);
+           p.rotate(90, 30);
+           p.shift(2, 0, 3);
+           vector &lt;Point&gt; v = r.intersection_points(p);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF143.png"
+ alt="[Figure 143. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 143. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the <code>Rectangle</code> r and the <code>Reg_Polygon</code> p
+ don't overlap at all, nor does the intersection line of the two planes
+ intersect with p.  However, it does intersect with p at the
+ labelled <code>Points</code>.
+ 
+      <pre class="example">          Point A(1, 1, 1);
+           Rectangle r(A, 4, 4);
+           Reg_Polygon p(A, 5, 5);
+           p.rotate(90, 30);
+           p.shift(4, 3, 3);
+           vector &lt;Point&gt; v = r.intersection_points(p);
+           int i = 0;
+           for (vector&lt;Point&gt;::iterator iter = v.begin();
+            iter != v.end(); ++iter)
+            iter-&gt;dotlabel(i++, "bot");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF144.png"
+ alt="[Figure 144. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 144. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- regpolyg.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Regular-Polygon-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rectangle-Reference">Rectangle Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polygon-Reference">Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">28 Regular Polygon Reference</h2>
+ 
+ <p><a name="index-Reg_005fPolygon-653"></a>Class <code>Reg_Polygon</code> is defined in <samp><span class="file">polygons.web</span></samp>, and
+ is derived from <code>Polygon</code>, using public derivation.
+ 
+    <p>As noted above in <a href="#Affine-Transformations-for-Polygons">Polygon Reference; Affine Transformations</a>, <code>class Reg_Polygon</code>,
+ like <code>class Rectangle</code>,
+ currently inherits its transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Polygon</code>.  Consequently,
+ the data members of a <code>Reg_Polygon</code>, except for <code>center</code>, are
+ not recalculated when it's transformed.  I plan to change this soon!  It
+ will also be necessary to add the function
+ <code>Reg_Polygon::is_reg_polygonal()</code>, in order to test whether a
+ <code>Reg_Polygon</code> is still regular and polygonal.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>
+ <li><a accesskey="2" href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Regular-Polygon-Operators">Regular Polygon Operators</a>
+ <li><a accesskey="4" href="#Querying-Regular-Polygons">Querying Regular Polygons</a>
+ <li><a accesskey="5" href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Regular-Polygon-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">28.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>internal_angle</b><var><a name="index-internal_005fangle-654"></a></var><br>
+ <blockquote><p>The angle at the center of the <code>Reg_Polygon</code> of the triangle formed
+ by the center and two adjacent corners. 
+ If n is the number of sides of a <code>Reg_Polygon</code>,
+ <code>internal_angle</code> will be 360.0/n, so <code>internal_angle</code>
+ will be 120 for a regular triangle, 90 for a square, 72 for a pentagon,
+ etc. 
+ <!-- !! Make figure. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>radius</b><var><a name="index-radius-655"></a></var><br>
+ <blockquote><p>The radius of the surrounding circle for a <code>Reg_Polygon</code> (<i>Umkreis</i>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: unsigned <b>short</b><var> sides<a name="index-short-656"></a></var><br>
+ <blockquote><p>The number of sides of a <code>Reg_Polygon</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-657"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Reg_Polygon</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>.  Dynamic allocation of
+ <code>Reg_Polygons</code> should only be
+ performed by <code>create_new&lt;Reg_Polygon&gt;()</code>, which sets
+ <code>on_free_store</code> to <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Regular-Polygon-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Polygon-Operators">Regular Polygon Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">28.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Reg_Polygon</b> (<var>void</var>)<var><a name="index-Reg_005fPolygon-658"></a></var><br>
+ <blockquote><p>Creates an empty <code>Reg_Polygon</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Reg_Polygon</b> (<var>const Point&amp; ccenter, const unsigned short ssides, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-Reg_005fPolygon-659"></a></var><br>
+ <blockquote><p>Creates a <code>Reg_Polygon</code> in the x-z plane, centered at the origin,
+ with the number of sides specified by <var>ssides</var> and with
+ <code>radius</code> = <var>ddiameter</var> / 2.
+ 
+         <p>The <code>Reg_Polygon</code> is rotated
+ about the x, y, and z-axes in that order by the angles given by
+ <var>angle_x</var>, <var>angle_y</var>, and <var>angle_z</var>, respectively, if any
+ one of them is non-zero.  Finally, the
+ <code>Reg_Polygon</code> is shifted such that its center is located at
+ <var>ccenter</var>.
+ 
+      <pre class="example">          Reg_Polygon r(origin, 3, 2.75, 10, 15, 12.5);
+           r.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF145.png"
+ alt="[Figure 145. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 145. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const unsigned short ssides, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-660"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above.
+ 
+         <p>A <code>Reg_Polygon</code> can theoretically have any number of sides, however
+ I haven't tested it for unreasonably large values.  The following
+ example demonstrates that <code>set()</code> can be used to change a
+ <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Reg_Polygon r;
+           real j = .5;
+           for (int i = 3; i &lt;= 16; ++i)
+             {
+               r.set(origin, i, j);
+               r.draw();
+               j += .5;
+             }
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF146.png"
+ alt="[Figure 146. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 146. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Reg_Polygon* <b>create_new&lt;Reg_Polygon&gt;</b> (<var>const Reg_Polygon* r</var>)<var><a name="index-create_005fnew_003cReg_005fPolygon_003e-661"></a></var><br>
+ &mdash; : Reg_Polygon* <b>create_new&lt;Reg_Polygon&gt;</b> (<var>const Reg_Polygon&amp; r</var>)<var><a name="index-create_005fnew_003cReg_005fPolygon_003e-662"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Reg_Polygons</code>. 
+ They create a <code>Reg_Polygon</code> on the free store and allocate memory for it using
+ <code>new(Reg_Polygon)</code>.  They return a pointer to the new <code>Reg_Polygon</code>. 
+ If <var>r</var> is a non-zero pointer or a reference,
+ the new <code>Reg_Polygon</code> will be a copy of
+ <var>r</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Reg_Polygon&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Regular-Polygon-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Regular-Polygons">Querying Regular Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">28.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Operator: const Reg_Polygon&amp; <b>operator=</b> (<var>const Reg_Polygon&amp; p</var>)<var><a name="index-operator_003d-663"></a></var><br>
+ <blockquote><p>Makes the <code>Reg_Polygon</code> a copy of <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Regular-Polygons"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygon-Operators">Regular Polygon Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">28.4 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: real <b>get_radius</b> (<var>void</var>)<var><a name="index-get_005fradius-664"></a></var><br>
+ <blockquote><p>Returns <code>radius</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Circles-for-Regular-Polygons"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Regular-Polygons">Querying Regular Polygons</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">28.5 Circles</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>in_circle</b> (<var>void</var>)<var><a name="index-in_005fcircle-665"></a></var><br>
+ <blockquote><p>Returns the enclosed <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, -1, 1);
+           Reg_Polygon h(P, 6, 4, 15, 12, 11.5);
+           h.filldraw(black, gray);
+           Circle c = h.in_circle();
+           c.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF147.png"
+ alt="[Figure 147. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 147. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>draw_in_circle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-draw_005fin_005fcircle-666"></a></var><br>
+ &mdash; <code>const</code> function: Circle <b>draw_in_circle</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = ""</var>]]])<var><a name="index-draw_005fin_005fcircle-667"></a></var><br>
+ <blockquote><p>Draws and returns the enclosed <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, 1, 1);
+           Reg_Polygon h(P, 7, 4, 80, 2, 5);
+           h.draw(black, "evenly");
+           h.draw_in_circle();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF148.png"
+ alt="[Figure 148. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 148. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>out_circle</b> (<var>void</var>)<var><a name="index-out_005fcircle-668"></a></var><br>
+ <blockquote><p>Returns the surrounding <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, -1, 1);
+           Reg_Polygon h(P, 6, 4, 15, 12, 11.5);
+           Circle c = h.out_circle();
+           c.filldraw(black, gray);
+           h.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF149.png"
+ alt="[Figure 149. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 149. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Circle <b>draw_out_circle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-draw_005fout_005fcircle-669"></a></var><br>
+ &mdash; <code>const</code> function: Circle <b>draw_out_circle</b> ([<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string</var>]<var> ppen = ""</var>]]])<var><a name="index-draw_005fout_005fcircle-670"></a></var><br>
+ <blockquote><p>Draws and returns the surrounding <code>Circle</code> of the <code>Reg_Polygon</code>.
+ 
+      <pre class="example">          Point P(0, 1, 1);
+           Reg_Polygon h(P, 7, 4, 80, 2, 5);
+           h.draw(black, "evenly");
+           h.draw_out_circle();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF150.png"
+ alt="[Figure 150. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 150. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- rectang.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Rectangle-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Polygon-Reference">Regular Polygon Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">29 Rectangle Reference</h2>
+ 
+ <p><a name="index-Rectangle-671"></a>Class <code>Rectangle</code> is defined in <samp><span class="file">rectangs.web</span></samp>, and
+ is derived from <code>Polygon</code>, using public derivation.
+ 
+    <p>As noted above in <a href="#Affine-Transformations-for-Polygons">Polygon Reference; Affine Transformations</a>, <code>class Rectangle</code>,
+ like <code>class Reg_Polygon</code>,
+ currently inherits its transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Polygon</code>.  Consequently,
+ the data members of a <code>Rectangle</code>, except for <code>center</code>, are
+ not recalculated when it's transformed.  I plan to change this soon!  It
+ will also be necessary to add the function
+ <code>Rectangle::is_rectangular()</code>, in order to test whether a
+ <code>Rectangle</code> is still rectangular.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Rectangle-Data-Members">Rectangle Data Members</a>
+ <li><a accesskey="2" href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Rectangle-Operators">Rectangle Operators</a>
+ <li><a accesskey="4" href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>
+ <li><a accesskey="5" href="#Querying-Rectangles">Querying Rectangles</a>
+ <li><a accesskey="6" href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Rectangle-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangle-Reference">Rectangle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variables: real <b>axis_h</b><var><a name="index-axis_005fh-672"></a></var><br>
+ &mdash; : real <b>axis_v</b><var><a name="index-axis_005fv-673"></a></var><br>
+ <blockquote><p>The lengths of the horizontal and vertical axes, respectively, of the
+ <code>Rectangle</code>.  Actually,
+ they are merely the horizontal and vertical axes by convention, since
+ there are no restrictions on the orientation of an <code>Rectangle</code>.
+ 
+         <p>Please note that <code>axis_h</code> and <code>axis_v</code> are currently not
+ recalculated, when a <code>Rectangle</code> is transformed.  I plan to do
+ something about this soon. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Private variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-674"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Rectangle</code> was dynamically allocated on the
+ free store, otherwise <code>false</code>.  Dynamic allocation of
+ <code>Rectangles</code> should only be
+ performed by <code>create_new&lt;Rectangle&gt;()</code>, which sets
+ <code>on_free_store</code> to <code>true</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Rectangle-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rectangle-Operators">Rectangle Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangle-Data-Members">Rectangle Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Rectangle</b> (<var>void</var>)<var><a name="index-Rectangle-675"></a></var><br>
+ <blockquote><p>Creates an empty <code>Rectangle</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Rectangle</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-Rectangle-676"></a></var><br>
+ <blockquote><p>Creates a <code>Rectangle</code> in the x-z plane, centered at the origin,
+ with width == <var>aaxis_h</var>
+ (in the + or - x
+  direction),
+ and height == <var>aaxis_v</var>
+ (in the
+ + or - z
+  direction). 
+ If one or more of the arguments
+ <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> are used, it is rotated
+ by those amounts around the appropriate axes. 
+ Finally, the <code>Rectangle</code> is shifted such that
+ its center lies at <var>ccenter</var>.
+ 
+      <pre class="example">          Point C(-1, -1, 1);
+           Rectangle r(C, 3, 4, 30, 30, 30);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF151.png"
+ alt="[Figure 151. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 151. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-677"></a></var><br>
+ <blockquote><p>Corresponds to the constructor described above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Rectangle</b> (<var>const Point&amp; p0, const Point&amp; p1, const Point&amp; p2, const Point&amp; p3</var>)<var><a name="index-Rectangle-678"></a></var><br>
+ <blockquote><p>Creates <code>Rectangle</code> using four <code>Point</code>
+ arguments.  The order of the arguments must correspond with a path
+ around the <code>Rectangle</code>.
+ 
+         <p>This function does not currently check that the arguments yield a valid
+ <code>Rectangle</code>, therefore all code using it must ensure that they do. 
+ <!-- !! TO DO:  Change this function, so that it checks! -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; pt0, const Point&amp; pt1, const Point&amp; pt2, const Point&amp; pt3</var>)<var><a name="index-set-679"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Rectangle* <b>create_new&lt;Rectangle&gt;</b> (<var>const Rectangle* r</var>)<var><a name="index-create_005fnew_003cRectangle_003e-680"></a></var><br>
+ &mdash; : Rectangle* <b>create_new&lt;Rectangle&gt;</b> (<var>const Rectangle&amp; r</var>)<var><a name="index-create_005fnew_003cRectangle_003e-681"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Rectangles</code>. 
+ They create a <code>Rectangle</code> on the free store and allocate memory for it using
+ <code>new(Rectangle)</code>.  They return a pointer to the new <code>Rectangle</code>.
+ 
+         <p>If <var>r</var> is a non-zero pointer or a reference,
+ the new <code>Rectangle</code> will be a copy of
+ <var>r</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Rectangle&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Rectangle-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment Operator: const Rectangle&amp; <b>operator=</b> (<var>const Rectangle&amp; r</var>)<var><a name="index-operator_003d-682"></a></var><br>
+ <blockquote><p>Makes the <code>Rectangle</code> a copy of <var>r</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Points-for-Rectangles"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Rectangles">Querying Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangle-Operators">Rectangle Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.4 Returning Points</h3>
+ 
+ <div class="defun">
+ &mdash; Function: Point <b>corner</b> (<var>unsigned short c</var>)<var><a name="index-corner-683"></a></var><br>
+ <blockquote><p>Returns the corner <code>Point</code> indicated by the argument <var>c</var>, which must be
+ between 0 and 3. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>mid_point</b> (<var>unsigned short m</var>)<var><a name="index-mid_005fpoint-684"></a></var><br>
+ <blockquote><p>Returns the mid-point of one of the sides.  The argument <var>c</var> must be
+ between 0 and 3. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Rectangles"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.5 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> functions: real <b>get_axis_h</b> (<var>void</var>)<var><a name="index-get_005faxis_005fh-685"></a></var><br>
+ &mdash; : real <b>get_axis_v</b> (<var>void</var>)<var><a name="index-get_005faxis_005fv-686"></a></var><br>
+ <blockquote><p>These functions return <code>axis_h</code> and <code>axis_v</code>, respectively.
+ 
+         <p>Please note, that <code>axis_h</code> and <code>axis_v</code> are currently not
+ recalculated, when a <code>Rectangle</code> is transformed.  I plan to do
+ something about this soon. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_rectangular</b> (<var>void</var>)<var><a name="index-is_005frectangular-687"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, if the <code>Rectangle</code> is rectangular, otherwise
+ <code>false</code>.  Transformations, such as shearing, can cause
+ <code>Rectangles</code> to become non-rectangular. 
+ <!-- !! TO DO:  Add example and illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Ellipses-for-Rectangles"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Rectangles">Querying Rectangles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Rectangle-Reference">Rectangle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">29.6 Ellipses</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>out_ellipse</b> (<code>void</code>)<var><a name="index-out_005fellipse-688"></a></var><br>
+ <blockquote><p>Returns the smallest <code>Ellipse</code> that surrounds the <code>Rectangle</code>.
+ 
+      <pre class="example">          Point P(-1, -1, 3);
+           Rectangle r(P, 3, 4, 60, 30, 15);
+           Ellipse e = r.out_ellipse();
+           e.filldraw(black, gray);
+           r.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF152.png"
+ alt="[Figure 152. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 152. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>in_ellipse</b> (<code>void</code>)<var><a name="index-in_005fellipse-689"></a></var><br>
+ <blockquote><p>Returns the <code>Ellipse</code> enclosed by the <code>Rectangle</code>.
+ 
+      <pre class="example">          Point P(-1, -1, 3);
+           Rectangle r(P, 3, 4, 60, 30, 15);
+           Ellipse e = r.in_ellipse();
+           r.filldraw(black, gray);
+           e.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF153.png"
+ alt="[Figure 153. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 153. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>draw_out_ellipse</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fout_005fellipse-690"></a></var><br>
+ <blockquote><p>Draws the smallest <code>Ellipse</code> that surrounds the <code>Rectangle</code>. 
+ The arguments are like those of <code>Path::draw()</code>
+ (see <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>). 
+ The return value is the surrounding <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Ellipse <b>draw_in_ellipse</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fin_005fellipse-691"></a></var><br>
+ <blockquote><p>Draws the <code>Ellipse</code> enclosed by the <code>Rectangle</code>. 
+ The arguments are like those of <code>Path::draw()</code>
+ (see <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>). 
+ The return value is the enclosed <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <!-- rcpcurve.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipse-Reference">Ellipse Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Rectangle-Reference">Rectangle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">30 Regular Closed Plane Curve Reference</h2>
+ 
+ <p><a name="index-Reg_005fCl_005fPlane_005fCurve-692"></a>Class <code>Reg_Cl_Plane_Curve</code> is defined in <samp><span class="file">curves.web</span></samp>. 
+ It is derived from <code>Path</code> using <code>public</code> derivation.
+ 
+    <p><code>Reg_Cl_Plane_Curve</code> is not called
+ &ldquo;<code>Regular_Closed_Plane_Curve</code>&rdquo; because the longer name
+ causes too many &ldquo;Overfull boxes&rdquo;<a rel="footnote" href="#fn-44" name="fnd-44"><sup>44</sup></a>
+ in the CWEAVE output of the program code. 
+ See <a href="#CWEB-Documentation">CWEB Documentation</a>.
+ 
+    <p><code>Reg_Cl_Plane_Curve</code> is meant to be used as a base class;  no
+ objects should be declared of type <code>Reg_Cl_Plane_Curve</code>. 
+ Currently, <code>class Ellipses</code> is derived from
+ <code>Reg_Cl_Plane_Curve</code> and <code>class Circle</code> is derived from
+ <code>Ellipse</code>.
+ 
+    <p>At present, I have no fixed definition of what constitutes
+ &ldquo;regularity&rdquo; as far as <code>Reg_Cl_Plane_Curves</code> are concerned. 
+ Ellipses and circles are &ldquo;regular&rdquo; in the sense that they have axes of
+ symmetry.  There must be an equation for a <code>Reg_Cl_Plane_Curve</code>,
+ such as
+ x^2 + y^2 = r^2
+ for a circle. 
+ A derived class should have a <code>solve()</code> function that uses this
+ equation.  <code>Reg_Cl_Plane_Curve::intersection_points()</code> in turn uses
+ <code>solve()</code> to find the intersection points of a line with the
+ <code>Reg_Cl_Plane_Curve</code>.  This way, the derived classes don't need
+ their own functions for finding their intersections with a line. 
+ However, such functions can be added, if desired.
+ 
+    <p>It is assumed that classes derived from <code>Reg_Cl_Plane_Curve</code> are
+ fillable, which implies that they must be closed <code>Paths</code>. 
+ <code>Reg_Cl_Plane_Curves</code> inherit their drawing and filling functions
+ from <code>Path</code>.
+ 
+    <p>The constructors and setting functions of classes derived from
+ <code>Reg_Cl_Plane_Curve</code> must ensure that the resulting geometric
+ figures are planar, convex, and that the number of <code>Points</code> they contain is
+ a multiple of 4.  The latter assumption is of importance in
+ <code>intersection_points()</code>, <code>segment()</code>, <code>half()</code>, and
+ <code>quarter()</code>. 
+ See <a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>, and
+ <a href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Reference; Segments</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>
+ <li><a accesskey="2" href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>
+ <li><a accesskey="3" href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>
+ <li><a accesskey="4" href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">30.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: Point <b>center</b><var><a name="index-center-693"></a></var><br>
+ <blockquote><p>The center of the <code>Reg_Cl_Plane_Curve</code>, if it has one. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>number_of_points</b><var><a name="index-number_005fof_005fpoints-694"></a></var><br>
+ <blockquote><p>The number of <code>Points</code> on <code>points</code> in a
+ <code>Reg_Cl_Plane_Curve</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Regular-Closed-Plane-Curves"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">30.2 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual functions: bool <b>is_quadratic</b> (<var>void</var>)<var><a name="index-is_005fquadratic-695"></a></var><br>
+ &mdash; : bool <b>is_cubic</b> (<var>void</var>)<var><a name="index-is_005fcubic-696"></a></var><br>
+ &mdash; : bool <b>is_quartic</b> (<var>void</var>)<var><a name="index-is_005fquartic-697"></a></var><br>
+ <blockquote><p>These functions all return <code>false</code>.  They are intended to be
+ overloaded by member functions of derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: real_triple <b>get_coefficients</b> (<var>real Slope, real v_intercept</var>)<var><a name="index-get_005fcoefficients-698"></a></var><br>
+ <blockquote><p>Returns a <code>real_triple</code> with all three values ==
+ <code>INVALID_REAL</code>.  Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: pair&lt;real, real&gt; <b>solve</b> (<var>char axis_unknown, real known</var>)<var><a name="index-solve-699"></a></var><br>
+ <blockquote><p>Returns a <code>pair&lt;real, real&gt;</code> with <code>first</code> =
+ <code>second</code> = <code>INVALID_REAL</code>. 
+ Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: signed short <b>location</b> (<var>Point ref_pt, Point p</var>)<var><a name="index-location-700"></a></var><br>
+ <blockquote><p>Returns a <code>signed short</code> indicating the location of <var>p</var> with
+ respect to the <code>Reg_Cl_Plane_Curve</code>, which must be planar. 
+ The <code>Reg_Cl_Plane_Curve</code> constructors should ensure that
+ <code>Reg_Cl_Plane_Curves</code> are, but there is no guarantee that they will
+ not have been manipulated into a non-planar state, by shearing, for
+ example.
+ 
+         <p>The argument <var>ref_pt</var> is used within the function for
+ shifting a copy of the <code>Reg_Cl_Plane_Curve</code> to a convenient
+ position.  It need not be the |center| of the <code>Reg_Cl_Plane_Curve</code>,
+ however, classes derived from <code>Reg_Cl_Plane_Curve</code> will probably
+ have their own versions of <code>location()</code>, which will pass <code>center</code>
+ as the <var>ref_pt</var> argument to this function. 
+ <code>Reg_Cl_Plane_Curves</code> need not have a meaningful |center|.
+ 
+         <p><code>location()</code> returns the following values:
+           <dl>
+ <dt>-1<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies
+ outside the perimeter of <code>*this</code>.
+ 
+           <br><dt>0<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies on the perimeter
+ of <code>*this</code>.
+ 
+           <br><dt>1<dd><var>p</var> and <code>*this</code> are coplanar, and <var>p</var> lies inside
+ the perimeter of <code>*this</code>.
+ 
+           <br><dt>-2<dd><var>p</var> and <code>*this</code> are not coplanar.
+ 
+           <br><dt>-3<dd>Something has gone terribly wrong.
+ 
+           <br><dt>-4<dd>The normal to <code>*this</code> has 0 magnitude, i.e., the
+ |Points| on <code>*this</code> are colinear.
+ 
+           <br><dt>-5<dd>An error occurred in putting <code>*this</code> in one of
+ the major planes. 
+ </dl>
+         </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Point <b>angle_point</b> (<var>real angle</var>)<var><a name="index-angle_005fpoint-701"></a></var><br>
+ <blockquote><p>Returns <code>INVALID_POINT</code>.  Intended to be overloaded by member functions of
+ derived classes. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Intersections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">30.3 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>Point ref_pt, Point p0, Point p1</var>)<var><a name="index-intersection_005fpoints-702"></a></var><br>
+ &mdash; <code>const</code> function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; ref_pt, const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-703"></a></var><br>
+ <blockquote><p>The version of this function taking <code>Point</code> arguments finds the
+ intersection points, if any, of the
+ <code>Reg_Cl_Plane_Curve</code> and the line
+ p
+ that passes through the <code>Points</code>
+ p_0
+ and
+ p_1. 
+ In the other version, the <code>Path</code> argument must be a linear
+ <code>Path</code>, and its first and last <code>Points</code> are passed to the
+ first version of this function as <var>p0</var> and <var>p1</var>, respectively.
+ 
+         <p>Let
+ C
+ be the <code>Reg_Cl_Plane_Curve</code>. 
+ C and p can intersect at at most two intersection points
+ i_1 and i_2. 
+ Let <code>bpp</code> be the return
+ value of this function. 
+ The intersection points need not be on the <em>line segment</em>
+ between <code>pt0</code> and <code>pt1</code>. 
+ <code>bpp.first.pt</code> will be set
+ to the first intersection point if it exists, or <code>INVALID_POINT</code> if
+ it doesn't.  If the first intersection point exists and is on the line
+ segment between <code>pt0</code> and <code>pt1</code>
+ 
+         <p>In [next figure]
+ , the line AB
+  is normal to the
+ <code>Ellipse</code> e, or, to put it another way, AB
+  is
+ perpendicular to the plane of e.  The intersection point i_0 lies
+ within the perimeter of e.
+ 
+         <p>The line DE
+  is skew to the plane of e, and
+ intersects e at i_1, on the perimeter of e.
+ 
+      <pre class="example">          Point p0(2, 2, 3);
+           Ellipse e(p0, 3, 4, 30, -60, -5.2);
+           Point p1 = p0.mediate(e.get_point(11), .5);
+           Point A = e.get_normal();
+           A *= 2.5;
+           A.shift(p1);
+           Point B = A.mediate(p1, 2);
+           bool_point_pair bpp = e.intersection_points(A, B);
+           Point C(0, 2, 0);
+           Point D(0, -3.5, 0);
+           C *= D.rotate(2, 0, -5);
+           C *= D.shift(e.get_point(4));
+           bpp = e.intersection_points(C, D);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF154.png"
+ alt="[Figure 154. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 154. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , q and e are coplanar.  In this case,
+ only the intersections of q with the perimeter of e are returned by
+ <code>intersection_points()</code>.
+ 
+      <pre class="example">          A = p0.mediate(e.get_point(3), 1.5);
+           B = p0.mediate(e.get_point(11), 1.5);
+           Path q(A, B);
+           bpp = e.intersection_points(q);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF155.png"
+ alt="[Figure 155. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 155. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Regular-Closed-Plane-Curve-Segments"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">30.4 Segments</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Path <b>segment</b> (<var>unsigned int factor, </var>[<var>real angle = 0, </var>[<var>bool closed = </var><code>true</code>]])<var><a name="index-segment-704"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> representing a segment of the <code>Reg_Cl_Plane_Curve</code>. 
+ <var>factor</var> must be
+ &gt;1 and &lt;= <code>number_of_points</code>.  If it is not, an error message is
+ issued and an empty <code>Path</code> is returned.
+ 
+         <p>If <var>angle</var> is non-zero, the segment <code>Path</code> is rotated by
+ <var>angle</var> about a line from <code>center</code> in the direction of the
+ normal to the plane of the <code>Reg_Cl_Plane_Curve</code>. 
+ Please note, that a <code>Reg_Cl_Plane_Curve</code> must have a meaningful
+ <code>center</code>, in order for rotation to work. 
+ If the absolute value of
+ <var>angle</var> &gt;360, a warning is issued, and
+ <code>fmod(</code><var>angle</var><code>, 360)</code> is used.
+ 
+         <p>If <var>closed</var> is <code>true</code>, the <code>Path</code> will be a cycle, with
+ the ends of the curved segment joined using the connector &lsquo;<samp><span class="samp">--</span></samp>&rsquo;. 
+ The curved segment is joined to the line using &lsquo;<samp><span class="samp">&amp;</span></samp>&rsquo; on each side.
+ 
+      <pre class="example">          Circle c(origin, 4, 30, 30, 30);
+           Path p = c.segment(3, 130);
+           p.show("p:");
+           -| p:
+           points.size() == 8
+           connectors.size() == 8(-0.00662541, -0.888379, -1.79185) ..
+           (0.741088, -0.673392, -1.73128) ..
+           (1.37598, -0.355887, -1.40714) ..
+           (1.80139, 0.0157987, -0.868767) ..
+           (1.95255, 0.385079, -0.198137) .. (1.80646, 0.695735, 0.502658) &amp;
+           (1.80646, 0.695735, 0.502658) --
+           (-0.00662541, -0.888379, -1.79185) &amp; cycle;
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF156.png"
+ alt="[Figure 156. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 156. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Path <b>half</b> ([<var>real angle = 0, </var>[<var>bool closed = true</var>]])<var><a name="index-half-705"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> using half of the <code>Points</code> on the
+ <code>Reg_Cl_Plane_Curve</code>. 
+ The effect of the arguments <var>angle</var> and <var>closed</var> is similar to
+ that in <code>segment()</code>, above.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 20, 15, 12.5);
+           Path p = e.half(0, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF157.png"
+ alt="[Figure 157. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 157. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline function: Path <b>quarter</b> ([<var>real angle = 0, </var>[<var>bool closed = </var><code>true</code>]])<var><a name="index-quarter-706"></a></var><br>
+ <blockquote><p>Returns a <code>Path</code> using a quarter of the <code>Points</code> on the
+ <code>Reg_Cl_Plane_Curve</code>. 
+ The effect of the arguments <var>angle</var> and <var>closed</var> is similar to
+ that in <code>segment()</code>, above.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 60, 5, 2.5);
+           Path p = e.quarter(180, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF158.png"
+ alt="[Figure 158. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 158. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- ellipse.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Ellipse-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circle-Reference">Circle Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">31 Ellipse Reference</h2>
+ 
+ <p><a name="index-Ellipse-707"></a>Class <code>Ellipse</code> is defined in <samp><span class="file">ellipses.web</span></samp>. 
+ It is derived from <code>Reg_Cl_Plane_Curve</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Ellipse-Data-Members">Ellipse Data Members</a>
+ <li><a accesskey="2" href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>
+ <li><a accesskey="4" href="#Ellipse-Operators">Ellipse Operators</a>
+ <li><a accesskey="5" href="#Labeling-Ellipses">Labeling Ellipses</a>
+ <li><a accesskey="6" href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>
+ <li><a accesskey="7" href="#Querying-Ellipses">Querying Ellipses</a>
+ <li><a accesskey="8" href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>
+ <li><a accesskey="9" href="#Ellipse-Intersections">Ellipse Intersections</a>
+ <li><a href="#Solving-Ellipses">Solving Ellipses</a>
+ <li><a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Ellipse-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Reference">Ellipse Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variables: Point <b>focus0</b><var><a name="index-focus0-708"></a></var><br>
+ &mdash; : Point <b>focus1</b><var><a name="index-focus1-709"></a></var><br>
+ <blockquote><p>The foci of the <code>Ellipse</code>.  They are located on the major axis of
+ the <code>Ellipse</code> at a distance of <code>linear_eccentricity</code> from
+ <code>center</code>, on opposite sides of the minor axis. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>linear_eccentricity</b><var><a name="index-linear_005feccentricity-710"></a></var><br>
+ <blockquote><p>The linear eccentricity of the <code>Ellipse</code> e, such that
+ e = \sqrta^2 - b^2,
+ where a and b are half the lengths of the major
+ and minor axes, respectively.  Let h stand for <code>axis_h</code> and v
+ for <code>axis_v</code>.  If h&gt;v, then a = h/2 and b = v/2.  If v&gt;h,
+ then a =v/2 and b = h/2.  If h = v, then the <code>Ellipse</code> is
+ circular (but not an object of type  <code>Circle</code>!), and a = b = v/2 = h/2.
+ 
+         <p>The linear eccentricity is the distance along the major axis of the
+ <code>Ellipse</code> from <code>center</code> to <code>focus0</code> and <code>focus1</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>numerical_eccentricity</b><var><a name="index-numerical_005feccentricity-711"></a></var><br>
+ <blockquote><p>The numerical eccentricity \epsilon of the <code>Ellipse</code>,
+ such
+ that \epsilon = e/a &lt; 1, where e is the linear eccentricity of the
+ <code>Ellipse</code>, and a is half the length of the major axis of the
+ <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variables: real <b>axis_h</b><var><a name="index-axis_005fh-712"></a></var><br>
+ &mdash; : real <b>axis_v</b><var><a name="index-axis_005fv-713"></a></var><br>
+ <blockquote><p>The horizontal and vertical axes, respectively, of the <code>Ellipse</code>.
+ 
+         <p>Actually, they are only or vertical
+ horizontal by convention, since there are no restrictions on the
+ orientation of an <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected static variable: unsigned short <b>DEFAULT_NUMBER_OF_POINTS</b><var><a name="index-DEFAULT_005fNUMBER_005fOF_005fPOINTS-714"></a></var><br>
+ <blockquote><p>The number of <code>Points</code> on an <code>Ellipse</code>, unless another number
+ is specified when an <code>Ellipse</code> constructor is invoked. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Ellipse-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Data-Members">Ellipse Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Ellipse</b> (<var>void</var>)<var><a name="index-Ellipse-715"></a></var><br>
+ <blockquote><p>Creates an empty <code>Ellipse</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Ellipse</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = DEFAULT_NUMBER_OF_POINTS</var>]]]])<var><a name="index-Ellipse-716"></a></var><br>
+ <blockquote><p>Creates an <code>Ellipse</code> in the x-z plane, centered at the origin, with
+ its horizontal axis
+ == <var>aaxis_h</var> and its vertical axis == <var>aaxis_v</var>.  If
+ any of the arguments <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> is
+ non-zero, the <code>Ellipse</code> is rotated about the x, y, and z-axis in
+ that order, by the amounts indicated by the corresponding arguments. 
+ Finally, the <code>Ellipse</code> is shifted such that its
+ center comes to lie at <var>ccenter</var>.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF159.png"
+ alt="[Figure 159. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 159. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point P(1, 1, 1);
+           Ellipse e(P, 6, 4, 15, 12, 11);
+           e.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF160.png"
+ alt="[Figure 160. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 160. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real aaxis_h, const real aaxis_v, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = DEFAULT_NUMBER_OF_POINTS</var>]]]])<var><a name="index-set-717"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Ellipse* <b>create_new&lt;Ellipse&gt;</b> (<var>const Ellipse* e</var>)<var><a name="index-create_005fnew_003cEllipse_003e-718"></a></var><br>
+ &mdash; : Ellipse* <b>create_new&lt;Ellipse&gt;</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-create_005fnew_003cEllipse_003e-719"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Ellipses</code>. 
+ They create a <code>Ellipse</code> on the free store and allocate memory for it using
+ <code>new(Ellipse)</code>.  They return a pointer to the new <code>Ellipse</code>.
+ 
+         <p>If <var>e</var> is a non-zero pointer or a reference,
+ the new <code>Ellipse</code> will be a copy of
+ <var>e</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Ellipse&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Performing-Transformations-on-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipse-Operators">Ellipse Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.3 Performing Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>do_transform</b> (<var>const Transform&amp; t, </var>[<var>bool check = </var><code>false</code>])<var><a name="index-do_005ftransform-720"></a></var><br>
+ <blockquote><p>Performs a transformation on an <code>Ellipse</code>.  The <code>Points</code> on
+ the <code>Ellipse</code> are multiplied by <var>t</var>. 
+ Then, if <var>check</var> is <code>true</code>,
+ <code>is_elliptical()</code> is called on the <code>Ellipse</code>. 
+ If the transformation has caused it to
+ become non-elliptical, <code>axis_h</code> and <code>axis_v</code> are set to
+ <code>INVALID_REAL</code>, and a warning is issued to <code>stderr</code>. 
+ <code>center</code>, <code>focus0</code>, and <code>focus1</code> are not set to
+ <code>INVALID_POINT</code>.  They may may no longer really be
+ the center and foci of the (non-elliptical) <code>Ellipse</code>, but they may
+ have some use for the programmer and/or user.
+ 
+         <p>If <var>check</var> is <code>true</code>, and the transformation does not cause
+ <code>*this</code> to become non-elliptical,
+ <code>axis_h</code>, <code>axis_v</code>, <code>linear_eccentricity</code>,
+ <code>numerical_eccentricity</code>, <code>focus0</code>, and
+ <code>focus1</code> are recalculated.
+ 
+      </blockquote></div>
+ 
+ <div class="node">
+ <a name="Ellipse-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Labeling-Ellipses">Labeling Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Ellipse&amp; <b>operator=</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-operator_003d-721"></a></var><br>
+ <blockquote><p>Makes the <code>Ellipse</code> a copy of <var>e</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-722"></a></var><br>
+ <blockquote><p>Calls <code>do_transform(t, true)</code>, and returns the latter's return
+ value. 
+ See <a href="#Performing-Transformations-on-Ellipses">Ellipse Reference; Performing Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Labeling-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Operators">Ellipse Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.5 Labeling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: void <b>label</b> ([<var>const string pos = "top", </var>[<var>const bool dot = </var><code>false</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-label-723"></a></var><br>
+ <blockquote><p>Labels the <code>Points</code> on <code>points</code>, using lowercase letters. 
+ <var>pos</var> is used to position all of the labels.  It is currently not
+ possible to have different positions for the labels.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+           e.label();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF161.png"
+ alt="[Figure 161. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 161. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: void <b>dotlabel</b> ([<var>string pos = "top", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-dotlabel-724"></a></var><br>
+ <blockquote><p>Like <code>label()</code>, except that the <code>Points</code> are dotted.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           e.draw();
+           e.dotlabel();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF162.png"
+ alt="[Figure 162. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 162. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Ellipses">Querying Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Labeling-Ellipses">Labeling Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.6 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-725"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-726"></a></var><br>
+ &mdash; Virtual function: Transform <b>rotate</b> (<var>const Path&amp; p, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-727"></a></var><br>
+ &mdash; Virtual function: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-scale-728"></a></var><br>
+ &mdash; Virtual function: Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-729"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-730"></a></var><br>
+ &mdash; Virtual function: Transform <b>shift</b> (<var>const Point&amp; p</var>)<var><a name="index-shift-731"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>real x, </var>[<var>real y = 1, </var>[<var>real z = 1</var>]])<var><a name="index-shift_005ftimes-732"></a></var><br>
+ &mdash; Virtual function: void <b>shift_times</b> (<var>const Point&amp; p</var>)<var><a name="index-shift_005ftimes-733"></a></var><br>
+ <blockquote><p>These create a <code>Transform</code> <var>t</var> locally, and call
+ <code>do_transform(t)</code>. 
+ See <a href="#Performing-Transformations-on-Ellipses">Ellipse Reference; Performing Transformations</a>.
+ 
+         <p>Rotating and shifting an <code>Ellipse</code> neither change the size of an
+ <code>Ellipse</code>, nor cause it to become
+ non-elliptical.  However, scaling and shearing can have these effects. 
+ For this reason, in <code>scale()</code> and <code>shear()</code>,
+ <code>do_transform()</code> is called with <code>true</code> as its <var>check</var>
+ argument, while it is <code>false</code> in <code>rotate()</code>, <code>shift()</code>,
+ and <code>shift_times()</code>.
+ 
+         <p>If scaling or shearing is performed on an <code>Ellipse</code>, and it is
+ still elliptical after the transformation, <code>focus0</code>, <code>focus1</code>,
+ <code>axis_h</code>, <code>axis_v</code>, <code>linear_eccentricity</code>, and
+ <code>numerical_eccentricity</code> are all
+ recalculated.  If the <code>Ellipse</code> is non-elliptical after the
+ transformation, <code>axis_h</code>, <code>axis_v</code>,
+ <code>linear_eccentricity</code>, and <code>numerical_eccentricity</code>
+ are all set to <code>INVALID_REAL</code>.  <code>center</code>, <code>focus0</code>, and
+ <code>focus1</code> are not set to <code>INVALID_POINT</code>.  Although they are no
+ longer the center and foci of an elliptical <code>Ellipse</code>, they may
+ still have some use for the user or programmer. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_elliptical</b> (<var>void</var>)<var><a name="index-is_005felliptical-734"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Ellipse</code> is elliptical, otherwise
+ <code>false</code>.
+ 
+         <p>Certain transformations, such as shearing and scaling, can cause
+ <code>Ellipses</code> to become non-elliptical. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline <code>const</code> function: bool <b>is_quadratic</b> (<code>void</code>)<var><a name="index-is_005fquadratic-735"></a></var><br>
+ <blockquote><p>Returns <code>true</code>, because the equation
+ for an ellipse in the x-y plane with its center at the
+ origin is the quadratic equation
+ x^2/a^2 + y^2/b^2 = 1
+ where a is half the horizontal axis
+ and b is half the vertical axis.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 2, 90);
+           e.draw();
+           Point P(e.angle_point(-35));
+           cout &lt;&lt; ((P.get_x() * P.get_x())
+                    / (e.get_axis_h()/2 * e.get_axis_h()/2))
+                   + ((P.get_y() * P.get_y())
+                      / (e.get_axis_v()/2 * e.get_axis_v()/2));
+           -| 1
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF163.png"
+ alt="[Figure 163. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 163. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: bool <b>is_cubic</b> (<code>void</code>)<var><a name="index-is_005fcubic-736"></a></var><br>
+ &mdash; : bool <b>is_quartic</b> (<code>void</code>)<var><a name="index-is_005fquartic-737"></a></var><br>
+ <blockquote><p>These functions both return <code>false</code>, because the equation of an
+ ellipse is neither a cubic nor a quartic function. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Elements-and-Information-for-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Ellipse-Intersections">Ellipse Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Ellipses">Querying Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.8 Returning Elements and Information</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Point&amp; <b>get_center</b> (<code>void</code>)<var><a name="index-get_005fcenter-738"></a></var><br>
+ &mdash; <code>const</code> virtual function: Point <b>get_center</b> (<code>void</code>)<var><a name="index-get_005fcenter-739"></a></var><br>
+ <blockquote><p>These functions return <code>center</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: const Point&amp; <b>get_focus</b> (<var>const unsigned short s</var>)<var><a name="index-get_005ffocus-740"></a></var><br>
+ &mdash; <code>const</code> function: Point <b>get_focus</b> (<var>const unsigned short s</var>)<var><a name="index-get_005ffocus-741"></a></var><br>
+ <blockquote><p>These functions return <code>focus0</code> or <code>focus1</code>, depending on the
+ value of <var>s</var>, which must be 0 or 1.  If <var>s</var> is not 0 or 1,
+ <code>get_focus()</code> returns <code>INVALID_POINT</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_linear_eccentricity</b> (<var>void</var>)<var><a name="index-get_005flinear_005feccentricity-742"></a></var><br>
+ <blockquote><p>Returns <code>linear_eccentricity</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real <b>get_numerical_eccentricity</b> (<var>void</var>)<var><a name="index-get_005fnumerical_005feccentricity-743"></a></var><br>
+ <blockquote><p>Returns <code>numerical_eccentricity</code>. 
+ <!-- !! TO DO: Add example. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_axis_v</b> (<code>void</code>)<var><a name="index-get_005faxis_005fv-744"></a></var><br>
+ &mdash; <code>const</code> function: real <b>get_axis_v</b> (<code>void</code>)<var><a name="index-get_005faxis_005fv-745"></a></var><br>
+ <blockquote><p>Calculates and returns the value of <code>axis_h</code>.
+ 
+         <p><code>get_axis_v()</code> first checks if the <code>Ellipse</code> is still
+ elliptical, using <code>is_elliptical()</code>
+ (see <a href="#Querying-Ellipses">Ellipse Reference; Querying</a>). 
+ Operations such as <code>scale()</code> and <code>shear()</code> can
+ cause an <code>Ellipse</code> to become non-elliptical. 
+ If this is the case, this function returns <code>INVALID_REAL</code>.
+ 
+         <p>If the <code>Ellipse</code> is still elliptical, <code>axis_v</code> is
+ recalculated and returned.  In the non-<code>const</code> version,
+ <code>axis_v</code> is also reset to the new value. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: real <b>get_axis_h</b> (<code>void</code>)<var><a name="index-get_005faxis_005fh-746"></a></var><br>
+ &mdash; <code>const</code> function: real <b>get_axis_h</b> (<code>void</code>)<var><a name="index-get_005faxis_005fh-747"></a></var><br>
+ <blockquote><p>Calculates and returns the value of <code>axis_h</code>.
+ 
+         <p><code>get_axis_h()</code> first checks if the <code>Ellipse</code> is still
+ elliptical, using <code>is_elliptical()</code>
+ (see <a href="#Querying-Ellipses">Ellipse Reference; Querying</a>). 
+ Operations such as <code>scale()</code> and <code>shear()</code> can
+ cause an <code>Ellipse</code> to become non-elliptical. 
+ If this is the case, this function returns <code>INVALID_REAL</code>.
+ 
+         <p>If the <code>Ellipse</code> is still elliptical, <code>axis_h</code> is
+ recalculated and returned.  In the non-<code>const</code> version,
+ <code>axis_h</code> is also reset to the new value. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: signed short <b>location</b> (<var>Point p</var>)<var><a name="index-location-748"></a></var><br>
+ <blockquote><p>Returns a value l indicating the location of the <code>Point</code> argument
+ p with respect to the <code>Ellipse</code>.
+ 
+         <p>Let e stand for the <code>Ellipse</code>. 
+ The return values are as follows:
+ 
+           <dl>
+ <dt>0<dd>p lies on the perimeter of e.
+ 
+           <br><dt>1<dd>p lies in the plane of e, within its perimeter.
+ 
+           <br><dt>-1<dd>p lies in the plane of e, outside its perimeter.
+ 
+           <br><dt>-2<dd>p and e do not lie in the same plane.
+ 
+           <br><dt>-3<dd>e is not elliptical, possibly due to having been transformed. 
+ </dl>
+ 
+      <pre class="example">          Ellipse e(origin, 3, 5, 45, 15, 3);
+           e.shift(2, 1, 1);
+           Point A = e.get_point(7);
+           cout &lt;&lt; e.location(A);
+           -| 0
+           Point B = center.mediate(e.get_point(2));
+           cout &lt;&lt; e.location(B);
+           -| 1
+           Point C = center.mediate(e.get_point(2), 1.5);
+           cout &lt;&lt; e.location(C);
+           -| -1
+           Point D = A;
+           D.shift(-2, 0, 4);
+           e.location(D);
+           -| WARNING! In Ellipse::location():
+              Point doesn't lie in plane of Ellipse.
+              Returning -2.
+           e.scale(1.5, 0, 1.5);
+           e.location(A);
+           -| WARNING! In Ellipse::do_transform(const Transform&amp;):
+              This transformation has made *this non-elliptical!
+           
+              ERROR! In Ellipse::location():
+              Ellipse is non-elliptical. Returning -3.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF164.png"
+ alt="[Figure 164. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 164. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Point <b>angle_point</b> (<var>real angle</var>)<var><a name="index-angle_005fpoint-749"></a></var><br>
+ <blockquote><p>Returns a point on the <code>Ellipse</code> given an angle. 
+ A <code>Point</code> <var>p</var> is set to the zeroth <code>Point</code> on the <code>Ellipse</code>
+ and rotated about the line from the center of the <code>Ellipse</code> in the
+ direction of the normal to the plane of the <code>Ellipse</code>. 
+ Then, the intersection of the ray from the center through
+ <var>p</var> and the perimeter of the <code>Ellipse</code> is returned.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4);
+           Point P = e.angle_point(135);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF165.png"
+ alt="[Figure 165. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 165. 
+ <br>
+ </p>
+ 
+         <p>[next figure]
+  demonstrates, that the rotation is unfortunately not always
+ in the direction one would prefer.  I don't have a solution to this
+ problem yet.
+ 
+      <pre class="example">          Ellipse e(origin, 6, 4, 90);
+           Point P = e.angle_point(135);
+           Point Q = e.angle_point(-135);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF166.png"
+ alt="[Figure 166. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 166. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Ellipse-Intersections"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solving-Ellipses">Solving Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.9 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool_point_pair <b>intersection_points</b> (<var>const Point&amp; p0, const Point&amp; p1</var>)<var><a name="index-intersection_005fpoints-750"></a></var><br>
+ &mdash; <code>const</code> virtual function: bool_point_pair <b>intersection_points</b> (<var>const Path&amp; p</var>)<var><a name="index-intersection_005fpoints-751"></a></var><br>
+ <blockquote><p>These functions return the intersection points of a line with an
+ <code>Ellipse</code>.  In the first version, the line is specified by the two
+ <code>Point</code> arguments. 
+ In the second version, <var>p</var><code>.is_linear()</code> must return <code>true</code>,
+ otherwise, <code>intersection_points()</code> issues an error message and
+ returns <code>INVALID_BOOL_POINT_PAIR</code>.
+ 
+         <p>If the line and the <code>Ellipse</code> are coplanar, there can be at most two
+ intersection points.  Otherwise, there can be at most one.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 7, 30, 30, 30);
+           e.shift(3, 0, 3);
+           Point p0 = e.get_center().mediate(e.get_point(3));
+           Point normal = e.get_normal();
+           Point A = normal;
+           A *= 2.5;
+           A.shift(p0);
+           Point B = normal;
+           B *= -2.5;
+           B.shift(p0);
+           bool_point_pair bpp = e.intersection_points(A, B);
+           bpp.first.pt.dotlabel("$i_0$", "rt");
+           Point C = e.get_point(15).mediate(e.get_point(11), 1.25);
+           Point D = e.get_point(11).mediate(e.get_point(15), 1.5);
+           Path q = C.draw(D);
+           bpp = e.intersection_points(q);
+           bpp.first.pt.dotlabel("$i_1$", "llft");
+           bpp.second.pt.dotlabel("$i_2$", "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF167.png"
+ alt="[Figure 167. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 167. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool_point_quadruple <b>intersection_points</b> (<var>Ellipse e, </var>[<var>const real step = 3, </var>[<var>bool verbose = </var><code>false</code>]])<var><a name="index-intersection_005fpoints-752"></a></var><br>
+ <blockquote><p>Returns the intersection points of two <code>Ellipses</code>.  Two <code>Ellipses</code>
+ can intersect at at most four points.
+ 
+         <p>Let <var>bpq</var> be the <code>bool_point_quadruple</code> returned by
+ <code>intersection_points()</code>.  If one or more intersection points are
+ found, the corresponding <code>Points</code> are stored in the
+ <code>pt</code> elements of the four <code>bool_points</code> belonging to
+ <var>bpq</var>, otherwise <code>INVALID_POINT</code>.  If a <code>Point</code> is found, the
+ <code>b</code> element of the <code>bool_point</code> will be <code>true</code>, otherwise
+ <code>false</code>.
+ 
+         <p>The <var>step</var> argument is used when the <code>Ellipses</code> are coplanar
+ and either have different centers or the vertical axis of one <code>Ellipse</code> is
+ colinear with the horizontal axis of the other (and vice versa).  In
+ these cases, the intersection points must be found by an iterative
+ routine.  A <code>Point</code> p travels around the perimeter of <code>*this</code>,
+ and its location with respect to <var>e</var> is tested.  <var>step</var> is the
+ angle of rotation used for stepping around the perimeter of
+ <code>*this</code>.  The default value, 3, should be adequate, unless the
+ <code>Ellipses</code> differ greatly in size.
+ 
+         <p>If the <var>verbose</var> argument is <code>true</code>,
+ <code>intersection_points()</code> will print information about the
+ intersection points to standard output.
+ 
+         <p>In [next figure]
+ , the <code>Ellipses</code> e and f both lie in the x-z
+ plane, are centered at the origin, and intersect at four points.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 2);
+           Ellipse f(origin, 2, 5);
+           bool_point_quadruple bpq = e.intersection_points(f);
+           bpq.first.pt.dotlabel(1, "llft");
+           bpq.second.pt.dotlabel(2, "urt");
+           bpq.third.pt.dotlabel(3, "ulft");
+           bpq.fourth.pt.dotlabel(4, "lrt");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF168.png"
+ alt="[Figure 168. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 168. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , e and f are coplanar, but don't lie in a major plane,
+ have different centers, and only intersect at two points.
+ 
+      <pre class="example">          Ellipse e(origin, 4, 2);
+           Ellipse f(origin, 2, 5);
+           f.shift(0, 0, 1);
+           f.rotate(0, 15);
+           f.shift(1, 0, 1);
+           e *= f.shift(-.25, 1, -1);
+           e *= f.rotate(10, -12.5, 3);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1, "urt");
+           bpq.second.pt.dotlabel(2, "ulft");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF169.png"
+ alt="[Figure 169. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 169. 
+ <br>
+ </p>
+ 
+         <p>If the planes of the <code>Ellipses</code> are parallel, there are, of course,
+ no intersection points.  If the <code>Ellipses</code> are non-coplanar, and
+ their planes are not parallel to each other,
+ <code>intersection_points()</code> first finds the line of intersection of the
+ planes of the <code>Ellipses</code>.  It then returns the <code>Points</code> of
+ intersection of this line with the <code>Ellipses</code>, if they exist.  If
+ the <var>verbose</var> argument is <code>true</code>, information about the
+ <code>Points</code> is printed to standard output.
+ 
+         <p>In [next figure]
+ , the two <code>Ellipses</code> lie in skew planes.  The plane
+ of f intersects with e at the <code>Points</code> labelled &ldquo;1&rdquo; and &ldquo;2&rdquo;,
+ while the plane of e intersects with f at the <code>Points</code> labelled
+ &ldquo;3&rdquo; and &ldquo;4&rdquo;.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 3);
+           Ellipse f(origin, 2, 5);
+           f.rotate(0, 0, 30);
+           f.rotate(0, 10);
+           f.rotate(45);
+           f.shift(1.5, 1);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1);
+           bpq.second.pt.dotlabel(2);
+           bpq.third.pt.dotlabel(3, "rt");
+           bpq.fourth.pt.dotlabel(4, "urt");
+           -| First point lies on the perimeter of *this.
+              First point lies inside e.
+              Second point lies on the perimeter of *this.
+              Second point lies outside e.
+              Third point lies outside *this.
+              Third point lies on the perimeter of e.
+              Fourth point lies inside *this.
+              Fourth point lies on the perimeter of e.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF170.png"
+ alt="[Figure 170. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 170. 
+ <br>
+ </p>
+ 
+         <p>In [next figure]
+ , the two <code>Ellipses</code> lie in skew planes.  The plane of
+ f intersects with e at the <code>Points</code> labelled &ldquo;1&rdquo; and &ldquo;2&rdquo;. 
+ The plane of e does not intersect with f, so <code>bpq.third.pt</code>
+ and <code>bpq.fourth.pt</code> are <code>INVALID_POINT</code>.
+ 
+      <pre class="example">          Ellipse e(origin, 5, 3);
+           Ellipse f(origin, 2, 5, 45);
+           f.shift(0, 2.5, 3);
+           bool_point_quadruple bpq = e.intersection_points(f, true);
+           bpq.first.pt.dotlabel(1);
+           bpq.second.pt.dotlabel(2);
+           -| First point lies on the perimeter of *this.
+              First point lies outside e.
+              Second point lies on the perimeter of *this.
+              Second point lies outside e.
+              Third intersection point is INVALID_POINT.
+              Fourth intersection point is INVALID_POINT.
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF171.png"
+ alt="[Figure 171. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 171. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Solving-Ellipses"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Intersections">Ellipse Intersections</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.10 Solving</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_pair <b>solve</b> (<var>char axis_unknown, real known</var>)<var><a name="index-solve-753"></a></var><br>
+ <blockquote><p>Returns two possible values for either the horizontal or vertical
+ coordinate.  This function assumes that the <code>Ellipse</code> lies in a major
+ plane with <code>center</code> at the origin.  Code that calls it must ensure
+ that these conditions are fulfilled. 
+ <!-- !! TO DO: Add EXAMPLE!! -->
+ 
+         <p><code>solve()</code> is called in
+ <code>Reg_Cl_Plane_Curve::intersection_points(Point, Point, Point)</code> and
+ <code>Reg_Cl_Plane_Curve::location()</code>, and
+ resolves to this function, when these functions are called on an
+ <code>Ellipse</code>.  However, <code>Ellipse::location()</code> overloads
+ <code>Reg_Cl_Plane_Curve::location()</code>, so the latter won't normally be
+ called on an <code>Ellipse</code>. 
+ See <a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>, and
+ <a href="#Querying-Regular-Closed-Plane-Curves">Regular Closed Plane Curve Reference; Querying</a>.
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: real_triple <b>get_coefficients</b> (<var>real Slope, real v_intercept</var>)<var><a name="index-get_005fcoefficients-754"></a></var><br>
+ <blockquote>
+         <p>Let x and y stand for the x and y-coordinates of a point on an
+ ellipse in the x-y plane, a for half of the horizontal axis
+ (<code>axis_h</code> / 2),
+ and b for half of the vertical axis
+ (<code>axis_v</code> / 2).
+ 
+         <p>Further, let y = mx + i be the equation of a line in
+ the x-y plane, where m is the slope and i the
+ y-intercept.
+ 
+         <p>This function returns the coefficients of the quadratic equation
+ that results from replacing y with mx + i
+ in the equation for the ellipse
+ 
+      <pre class="display">          x^2/a^2 + y^2/b^2 = 1<br>
+ </pre>
+         <p>namely
+      <pre class="display">          x^2/a^2 + (mx + i)^2/b^2 - 1 = 0
+           == (b^2x + a^2m^2)x^2 + 2a^2imx + (a^2i^2 - a^2b^2) = 0.
+ </pre>
+         <p>The coefficients are returned in the <code>real_triple</code> in the order
+ one would expect: <code>r.first</code> is the coefficient of x^2, <code>r.second</code> of
+ x and <code>r.third</code> of the constant term
+ (x^0 == 1).
+ 
+         <p><code>get_coefficients()</code> is called in
+ <code>Reg_Cl_Plane_Curve::intersection_points(Point, Point, Point)</code>, and
+ resolves to this function, when the latter is called on an
+ <code>Ellipse</code>. 
+ See <a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Reference; Intersections</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Rectangles-for-Ellipses"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solving-Ellipses">Solving Ellipses</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Ellipse-Reference">Ellipse Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">31.11 Rectangles</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>out_rectangle</b> (<code>void</code>)<var><a name="index-out_005frectangle-755"></a></var><br>
+ <blockquote><p>Returns the <code>Rectangle</code> that surrounds the <code>Ellipse</code>.
+ 
+      <pre class="example">          Ellipse e(origin, 3, 4, 45, 30, 17);
+           e.shift(1, -1, 2);
+           Rectangle r = e.out_rectangle();
+           r.filldraw(black, gray);
+           e.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF172.png"
+ alt="[Figure 172. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 172. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>in_rectangle</b> (<code>void</code>)<var><a name="index-in_005frectangle-756"></a></var><br>
+ <blockquote><p>Returns the <code>Rectangle</code> enclosed within the <code>Ellipse</code>.
+ 
+      <pre class="example">          Rectangle r = e.in_rectangle();
+           e.filldraw(black, gray);
+           r.unfilldraw(black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF173.png"
+ alt="[Figure 173. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 173. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>draw_out_rectangle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fout_005frectangle-757"></a></var><br>
+ <blockquote><p>Draws the <code>Rectangle</code> that surrounds the <code>Ellipse</code>.  The arguments
+ are like those of <code>Path::draw()</code>. 
+ The return value is the surrounding <code>Rectangle</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+      <pre class="example">          Ellipse e(origin, 2.5, 5, 10, 12, 15.5);
+           e.shift(-1, 1, 1);
+           e.draw_out_rectangle(black, "evenly", "pencircle scaled .3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF174.png"
+ alt="[Figure 174. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 174. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: Rectangle <b>draw_in_rectangle</b> ([<var>const Color&amp; ddraw_color = </var><code>*Colors::default_color</code><var>, </var>[<var>string ddashed = "", </var>[<var>string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw_005fin_005frectangle-758"></a></var><br>
+ <blockquote><p>Draws the <code>Rectangle</code> enclosed within the <code>Ellipse</code>.  The arguments
+ are like those of <code>Path::draw()</code>. 
+ The return value is the enclosed <code>Rectangle</code>. 
+ See <a href="#Drawing-and-Filling-Paths">Path Reference; Drawing and Filling</a>.
+ 
+      <pre class="example">          Ellipse e(origin, 3.5, 6, 10, 12, 15.5);
+           e.shift(-1, 1, 1);
+           e.draw_in_rectangle(black, "evenly", "pencircle scaled .3mm");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF175.png"
+ alt="[Figure 175. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 175. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- circle.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Circle-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Pattern-Reference">Pattern Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Ellipse-Reference">Ellipse Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">32 Circle Reference</h2>
+ 
+ <p><a name="index-Circle-759"></a>Class <code>Circle</code> is defined in <samp><span class="file">circles.web</span></samp>. 
+ It is derived from <code>Ellipse</code>, using public derivation.
+ 
+    <p>Since <code>Circle</code> is just a special kind of <code>Ellipse</code>, there is
+ often no need to define special functions for <code>Circles</code>.
+ 
+    <p>Currently, <code>Circle</code> inherits the transformation functions and
+ <code>operator*=(const Transform&amp;)</code> from <code>Ellipse</code>.  Consequently,
+ the data member <code>radius</code>, described below,
+ is not recalculated, when transformations
+ are performed on a <code>Circle</code>.  I plan to change this soon!
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Circle-Data-Members">Circle Data Members</a>
+ <li><a accesskey="2" href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Circle-Operators">Circle Operators</a>
+ <li><a accesskey="4" href="#Querying-Circles">Querying Circles</a>
+ <li><a accesskey="5" href="#Circle-Intersections">Circle Intersections</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Circle-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Circle-Reference">Circle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Circle-Reference">Circle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">32.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Private variable: real <b>radius</b><var><a name="index-radius-760"></a></var><br>
+ <blockquote><p>The radius of the <code>Circle</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Circle-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circle-Operators">Circle Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Circle-Data-Members">Circle Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Circle-Reference">Circle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">32.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: <code>void</code> <b>Circle</b> (<code>void</code>)<var><a name="index-Circle-761"></a></var><br>
+ <blockquote><p>Creates an empty <code>Circle</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: <code>void</code> <b>Circle</b> (<var>const Point&amp; ccenter, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0, </var>[<var>const unsigned short nnumber_of_points = </var><code>DEFAULT_NUMBER_OF_POINTS</code>]]]])<var><a name="index-Circle-762"></a></var><br>
+ <blockquote><p>Creates a <code>Circle</code> with <code>radius</code> ==
+ <var>ddiameter</var>/2 in the x-z plane and centered at the origin
+ with <var>nnumber_of_points</var> <code>Points</code>.  If any of the arguments
+ <var>angle_x</var>, <var>angle_y</var>, or <var>angle_z</var> is
+ <code>!= 0</code>,
+ the <code>Circle</code> is rotated around the major axes by the angles
+ indicated by the arguments.  Finally, the
+ <code>Circle</code> is shifted such that <code>center</code> comes to lie at
+ <var>ccenter</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; ccenter, const real ddiameter, </var>[<var>const real angle_x = 0, </var>[<var>const real angle_y = 0, </var>[<var>const real angle_z = 0</var>]]])<var><a name="index-set-763"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Circle* <b>create_new&lt;Circle&gt;</b> (<var>const Circle* c</var>)<var><a name="index-create_005fnew_003cCircle_003e-764"></a></var><br>
+ &mdash; : Circle* <b>create_new&lt;Circle&gt;</b> (<var>const Circle&amp; c</var>)<var><a name="index-create_005fnew_003cCircle_003e-765"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Circles</code>. 
+ They create a <code>Circle</code> on the free store and allocate memory for it using
+ <code>new(Circle)</code>.  They return a pointer to the new <code>Circle</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Circle</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Circle&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Circle-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Circles">Querying Circles</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Circle-Reference">Circle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">32.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Circle&amp; <b>operator=</b> (<var>const Circle&amp; c</var>)<var><a name="index-operator_003d-766"></a></var><br>
+ <blockquote><p>Makes the <code>Circle</code> a copy of <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: Circle&amp; <b>operator=</b> (<var>const Ellipse&amp; e</var>)<var><a name="index-operator_003d-767"></a></var><br>
+ <blockquote><p>Makes the <code>Circle</code> a copy of <var>e</var>, if <var>e</var> is circular. 
+ <code>radius</code> is set to <var>e</var>.<code>axis_v</code> / 2 and
+ <code>*this</code> is returned.
+ 
+         <p>If <var>e</var> is not circular, this function issues an error message and returns <code>*this</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Circles"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Circle-Intersections">Circle Intersections</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Circle-Operators">Circle Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Circle-Reference">Circle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">32.4 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> function: bool <b>is_circular</b> (<var>void</var>)<var><a name="index-is_005fcircular-768"></a></var><br>
+ <blockquote><p>Returns <code>true</code> if the <code>Circle</code> is circular, otherwise
+ <code>false</code>.
+ 
+         <p>Certain transformations, such as shearing and scaling, can cause
+ <code>Circles</code> to become non-circular.
+ 
+      <pre class="example">          Circle c(origin, 3, 90);
+           cout &lt;&lt; c.is_circular();
+           -| 1
+           
+           Circle d = c;
+           d.shift(2.5);
+           d.scale(2, 3);
+           cout &lt;&lt; d.is_circular();
+           -| 0
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF176.png"
+ alt="[Figure 176. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 176. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: real <b>get_radius</b> (<code>void</code>)<var><a name="index-get_005fradius-769"></a></var><br>
+ <blockquote><p>Returns <code>radius</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Inline function: real <b>get_diameter</b> (<code>void</code>)<var><a name="index-get_005fdiameter-770"></a></var><br>
+ <blockquote><p>Returns
+ 2 * <code>radius</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Circle-Intersections"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Circles">Querying Circles</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Circle-Reference">Circle Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">32.5 Intersections</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual <code>const</code> function: bool_point_quadruple <b>intersection_points</b> (<var>const Circle&amp; c, </var>[<var>const bool verbose = </var><code>false</code>])<var><a name="index-intersection_005fpoints-771"></a></var><br>
+ <blockquote><p>Returns the intersection points of two <code>Circles</code>.
+ 
+         <p>If the <code>Circles</code> are coplanar, they can intersect at at most two
+ points.  There is an easy algebraic solution for this, so in this case,
+ this function is faster than <code>Ellipse::intersection_points(Ellipse,
+ bool)</code>, which uses an iterative procedure to find the points.
+ 
+         <p>If the <code>Circles</code> are non-coplanar, the intersection points of each
+ <code>Circle</code> with the plane of the other <code>Circle</code> are returned, so
+ a maximum of four <code>Points</code> can be found.
+ 
+      <!-- !! TO DO:  Add more examples. -->
+      <pre class="example">          Circle t(origin, 5, 90);
+           Circle c(origin, 3, 90);
+           c.shift(3);
+           c.rotate(0, 0, 45);
+           bool_point_quadruple bpq = t.intersection_points(c);
+           bpq.first.pt.dotlabel("$f$");
+           bpq.second.pt.dotlabel("$s$");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF177.png"
+ alt="[Figure 177. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 177. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- pattern.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Pattern-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solid-Reference">Solid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Circle-Reference">Circle Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">33 Pattern Reference</h2>
+ 
+ <p>There is no currently no class &ldquo;<code>Pattern</code>&rdquo;. 
+ If it turns out to be
+ useful for this purpose, I will define a <code>Pattern</code> class, and
+ perhaps additional derived classes.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Plane-Tesselations">Plane Tesselations</a>
+ <li><a accesskey="2" href="#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Plane-Tesselations"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Roulettes-and-Involutes">Roulettes and Involutes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Pattern-Reference">Pattern Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Pattern-Reference">Pattern Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">33.1 Plane Tesselations</h3>
+ 
+ <p>3DLDF can be used to make perspective projections of plane tesselations
+ and other two-dimensional patterns.  These can be used for
+ drawing tiled floors and other architectural items, among other things. 
+ While patterns can be generated by using the basic facilities of C++
+  and
+ 3DLDF without any specially defined functions, it can be useful to
+ define such functions.
+ 
+    <p>3DLDF currently contains only one function for drawing patterns based on
+ a plane tessellation.  I plan to add more soon.
+ 
+ <div class="defun">
+ &mdash; Function: unsigned int <b>hex_pattern_1</b> ([<var>real diameter_outer = 5, </var>[<var>real diameter_middle = 0, </var>[<var>real diameter_inner = 0, </var>[<var>unsigned short first_row = 5, </var>[<var>unsigned short double_rows = 10, </var>[<var>unsigned short row_shift = 2, </var>[<var>Color draw_color_outer = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_outer = </var><code>*Colors::background_color</code><var>, </var>[<var>Color draw_color_middle = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_middle = </var><code>*Colors::background_color</code><var>, </var>[<var>Color draw_color_inner = </var><code>*Colors::default_color</code><var>, </var>[<var>Color fill_color_inner = </var><code>*Colors::background_color</code><var>, </var>[<var>string pen_outer = "pencircle scaled .5mm", </var>[<var>string pen_middle = "pencircle scaled .3mm", </var>[<var>string pen_inner = "pencircle scaled .3mm", </var>[<var>Picture&amp; picture = </var><code>current_picture</code><var>, </var>[<var>unsigned int max_hexagons = 1000</var>]]]]]]]]]]]]]]]]])<var><a name="index-hex_005fpattern_005f1-772"></a></var><br>
+ <blockquote><p>Draws a pattern consisting of hexagons forming a tesselation of the x-z
+ plane, with additional hexagons within them.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><code>real</code> <var>diameter_outer</var><dd>Default:  5.  The diameter of the outer hexagon in each set of three
+ hexagons.  The outer hexagons form a tessellation of the plane.
+ 
+           <br><dt><code>real</code> <var>diameter_middle</var><dd>Default: 0.  The diameter of the middle hexagon in a set of three
+ hexagons.
+ 
+           <br><dt><code>real</code> <var>diameter_inner</var><dd>Default: 0.  The diameter of the inner hexagon in a set of three
+ hexagons.
+ 
+           <br><dt><code>unsigned short</code> <var>first_row</var><dd>Default: 5.  The number of sets of hexagons in the first single row. 
+ The second single row will have
+ <var>first_row</var> + 1 sets of hexagons.
+ 
+           <br><dt><code>unsigned short</code> <var>double_rows</var><dd>Default: 10.  The number of double rows drawn.
+ 
+           <br><dt><code>unsigned short</code> <var>row_shift</var><dd>Default: 2. 
+ For <var>row_shift</var>
+ != 0,
+ the number of sets of hexagons in each (single) row is
+ increased by 2 every <var>row_shift</var> rows.  If <var>row_shift</var> ==
+ 0, the number sets of hexagons remains constant. 
+ The rows remain centered around the z-axis.
+ 
+           <br><dt><code>Color</code> <var>draw_color_outer</var><dd>Default: <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the outer hexagons.
+ 
+           <br><dt><code>Color</code> <var>fill_color_outer</var><dd>Default: <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the outer hexagons.
+ 
+           <br><dt><code>Color</code> <var>draw_color_middle</var><dd>Default:  <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the middle hexagon.
+ 
+           <br><dt><code>Color</code> fill_color_middle<dd>Default:  <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the middle hexagons.
+ 
+           <br><dt><code>Color</code> <var>draw_color_inner</var><dd>Default:  <code>*Colors::default_color</code>. 
+ The <code>Color</code> used for drawing the inner hexagons.
+ 
+           <br><dt><code>Color</code> <var>fill_color_inner</var><dd>Default:  <code>*Colors::background_color</code>. 
+ The <code>Color</code> used for filling the inner hexagons.
+ 
+           <br><dt><code>string</code> <var>pen_outer</var><dd>Default: <code>"pencircle scaled .5mm"</code>. 
+ The pen used for drawing the outer hexagons.
+ 
+           <br><dt><code>string</code> <var>pen_middle</var><dd>Default:  <code>"pencircle scaled .3mm"</code>. 
+ The pen used for drawing the middle hexagons.
+ 
+           <br><dt><code>string</code> pen_inner<dd>Default:  <code>"pencircle scaled .3mm"</code>. 
+ The pen used for drawing the inner hexagons.
+ 
+           <br><dt><code>Picture&amp;</code> <var>picture</var><dd>Default:  <code>current_picture</code>. 
+ The <code>Picture</code> onto which the pattern is put.
+ 
+           <br><dt><code>unsigned int</code> <var>max_hexagons</var><dd>Default:  1000. 
+ The maximum number of hexagons that will be drawn.
+ 
+         </dl>
+ 
+         <p>Draws a pattern in the x-z plane consisting of hexagons.  The outer
+ hexagons form a tessellation.  The middle and inner hexagons fit
+ within the outer hexagons.  The hexagons are drawn in double rows. 
+ The tessellation can be repeated by copying a
+ double row and shifting the copy to lie directly behind the first double
+ row.  If the <code>Picture</code> with the pattern is projected with the
+ <code>Focus</code> in front of the pattern, looking in the direction of the back
+ of the pattern,
+ the first row of hexagons will appear larger than the rows
+ behind it.  Therefore, in order for the perspective projection of the
+ pattern to fill a rectangular area on the plane of projection,
+ it will generally be necessary to increase the number of sets of
+ hexagons in each double row.  On the other hand, if the same number of
+ sets of hexagons were used in the front double row, as will be needed for the
+ back double row, many of them would probably be unprojectable.
+ 
+         <p>The return value of this function is the number of hexagons drawn.
+ 
+      <pre class="example">          default_focus.set(0, 10, -10, 0, 10, 25, 10);
+           hex_pattern_1(1, 0, 0, 5, 5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF178.png"
+ alt="[Figure 178. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 178. 
+ <br>
+ </p>
+ 
+      <pre class="example">          default_focus.set(-5, 5, -10, 0, 10, 25, 10);
+           hex_pattern_1(2, 1.5, 1, 2, 5, 2, black, gray, black,
+                         light_gray, black);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF179.png"
+ alt="[Figure 179. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 179. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Roulettes-and-Involutes"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Plane-Tesselations">Plane Tesselations</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Pattern-Reference">Pattern Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">33.2 Roulettes and Involutes</h3>
+ 
+ <blockquote>
+ &ldquo;A <dfn>roulette</dfn> is the curve generated by a point which is carried by
+ a curve which rolls on a fixed curve. [<small class="dots">...</small>]  The locus of a point
+ carried by a circle rolling on a straight line is a <dfn>trochoid</dfn>.  If
+ the point is inside the circle the trochoid has inflexions;  if it is
+ outside the circle, but rigidly attached to it, the trochoid has loops. 
+ [<small class="dots">...</small>]  In the particular case when the point is on the circumference
+ of the rolling circle the roulette is a <dfn>cycloid</dfn>.  When the circle
+ rolls on the outside of another circle the corresponding curves are the
+ <dfn>epitrochoids</dfn> and <dfn>epicycloids</dfn>;  if it rolls on the inside,
+ they are the <dfn>hypotrochoids</dfn> and <dfn>hypocycloids</dfn>.&rdquo;
+ <div align="right">H. Martyn Cundy and A. P. Rollett, <em>Mathematical Models</em>, p. 46.
+    </div>
+ </blockquote>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Epicycloids">Epicycloids</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Epicycloids"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Roulettes-and-Involutes">Roulettes and Involutes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Roulettes-and-Involutes">Roulettes and Involutes</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">33.2.1 Epicycloids</h4>
+ 
+ <!-- !! TO DO:  Check whether @code{epicycloid_pattern_3()} works.  If it -->
+ <!-- does, document it here.  LDF 2003.09.02. -->
+ <div class="defun">
+ &mdash; Function: unsigned int <b>epicycloid_pattern_1</b> (<var>real diameter_inner, real diameter_outer_start, real diameter_outer_end, real step, int arc_divisions, unsigned int offsets, </var>[<var>vector&lt;const Color*&gt; colors = </var><code>Colors::default_color_vector</code>])<var><a name="index-epicycloid_005fpattern_005f1-773"></a></var><br>
+ <blockquote><p>Draws a pattern consisting of epicycloids.  The  outer circle rolls
+ around the circumference of the inner circle and a <code>Point</code> on the
+ outer circle traces an epicycloid.
+ 
+         <p>If <var>offsets</var> is greater than 1, the outer circle is rotated
+ <var>offset</var> times around the center of the inner circle
+ by
+ 360 / offsets
+ (starting from the outer circle's original
+ position).  From each of these new positions, an epicycloid is drawn.
+ 
+         <p>While <var>diameter_outer_start</var> is
+ greater than or equal to <var>diameter_outer_end</var>, the diameter of the
+ outer circle is reduced by <var>step</var>, and another set of epicycloids is
+ traced, as described above.  Each time the diameter of
+ the outer circle is reduced, a new <code>Color</code> is taken from
+ <var>colors</var> for the drawing commands.  If there are more iterations
+ than <code>Colors</code>, the last <code>Color</code> on <var>colors</var> is used for
+ the remaining iterations.
+ 
+      <!-- !! TO DO:  Change function, so that the list is run through again. -->
+         <p>The arguments:
+           <dl>
+ <dt><code>real</code> <var>diameter_inner</var><dd>The diameter of the inner circle.
+ 
+           <br><dt><code>real</code> <var>diameter_outer_start</var><dd>The diameter of the outer circle for the first iteration.  It must be
+ greater than or equal to <var>diameter_outer_end</var>.
+ 
+           <br><dt><code>real</code> <var>diameter_outer_end</var><dd>The diameter of the outer circle for the last iteration. 
+ It must be
+ less than or equal to <var>diameter_outer_start</var>.
+ 
+           <br><dt><code>real</code> <var>step</var><dd>The amount by which the diameter of the outer circle is <em>reduced</em>
+ upon each iteration.
+ 
+           <br><dt><code>int</code> <var>arc_divisions</var><dd>The number of divisions of the circle used for calculating <code>Points</code>
+ on the epicycloid.  For instance, if <var>arc_divisions</var> is 90, then
+ the <code>Path</code> for each epicycloid will only have 4 <code>Points</code>,
+ since 360 / 90 = 4.
+ 
+           <br><dt><code>unsigned int</code> <var>offsets</var><dd>The number of epicycloids drawn upon each iteration.  Each one is
+ rotated by 360 / <var>offsets</var> around the center of the inner circle. 
+ <var>offsets</var> must be greater than or equal to 1.
+ 
+           <br><dt><code>vector&lt;const Color*&gt;</code> <var>colors</var><dd>Default: <code>Colors::default_color_vector</code>.  The <code>Colors</code> pointed
+ to by the pointers on this vector are used for drawing the epicycloids. 
+ One <code>Color</code> is used for each iteration.
+ 
+         </dl>
+ 
+         <p>Example:
+      <pre class="example">          epicycloid_pattern_1(5, 3, 3, 1, 72);
+           current_picture.output(Projections::PARALLEL_X_Z);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF180.png"
+ alt="[Figure 180. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 180. 
+ <br>
+ </p>
+ 
+         <p>Example:
+      <pre class="example">          default_focus.set(2, 5, -10, 2, 5, 10, 10);
+           epicycloid_pattern_1(5, 3, 3, 1, 36);
+           current_picture.output();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF181.png"
+ alt="[Figure 181. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 181. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- solid.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Solid-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Pattern-Reference">Pattern Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">34 Solid Reference</h2>
+ 
+ <p><a name="index-Solid-774"></a>Class <code>Solid</code> is defined in <samp><span class="file">solids.web</span></samp>. 
+ It's derived from <code>Shape</code> using public derivation.  It is intended
+ to be used as a base class for
+ more specialized classes representing solid figures, e.g., cuboids,
+ polyhedra, solids of rotation, etc.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Solid-Data-Members">Solid Data Members</a>
+ <li><a accesskey="2" href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Solid-Destructor">Solid Destructor</a>
+ <li><a accesskey="4" href="#Solid-Operators">Solid Operators</a>
+ <li><a accesskey="5" href="#Copying-Solids">Copying Solids</a>
+ <li><a accesskey="6" href="#Setting-Solid-Members">Setting Solid Members</a>
+ <li><a accesskey="7" href="#Querying-Solids">Querying Solids</a>
+ <li><a accesskey="8" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ <li><a accesskey="9" href="#Showing-Solids">Showing Solids</a>
+ <li><a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>
+ <li><a href="#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>
+ <li><a href="#Outputting-Solids">Outputting Solids</a>
+ <li><a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>
+ <li><a href="#Clearing-Solids">Clearing Solids</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Solid-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Reference">Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>on_free_store</b><var><a name="index-on_005ffree_005fstore-775"></a></var><br>
+ <blockquote><p><code>true</code>, if the <code>Solid</code> was dynamically allocated on the free
+ store, otherwise <code>false</code>.  <code>Solids</code> should only be allocated
+ on the free store by <code>create_new&lt;Solid&gt;()</code>, or analogous functions
+ for derived classes. 
+ See <a href="#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: Point <b>center</b><var><a name="index-center-776"></a></var><br>
+ <blockquote><p>The center of the <code>Solid</code>.  An object of a type derived from
+ <code>Solid</code> need not have a meaningful <code>center</code>.  However, many
+ do, so it's convenient to be able to access it using the member
+ functions of <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: bool <b>do_output</b><var><a name="index-do_005foutput-777"></a></var><br>
+ <blockquote><p>Set to <code>false</code> in <code>Picture::output()</code>, if the <code>Solid</code>
+ cannot be projected using the arguments of that particular invocation of
+ <code>output()</code>.  Reset to <code>true</code> at the end of
+ <code>Picture::output()</code>, so that the <code>Solid</code> will be tested for
+ projectability again, if <code>output()</code> is called on the
+ <code>Picture</code> again. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variables: vector&lt;Path*&gt; <b>paths</b><var><a name="index-paths-778"></a></var><br>
+ &mdash; : vector&lt;Circle*&gt; <b>circles</b><var><a name="index-circles-779"></a></var><br>
+ &mdash; : vector&lt;Ellipse*&gt; <b>ellipses</b><var><a name="index-ellipses-780"></a></var><br>
+ &mdash; : vector &lt;Reg_Polygon*&gt; <b>reg_polygons</b><var><a name="index-reg_005fpolygons-781"></a></var><br>
+ &mdash; : vector&lt;Rectangle*&gt; <b>rectangles</b><var><a name="index-rectangles-782"></a></var><br>
+ <blockquote><p>Vectors of pointers to the <code>Paths</code>, <code>Circles</code>,
+ <code>Ellipses</code>, <code>Reg_Polygons</code>, and <code>Rectangles</code>,
+ respectively, belonging to the <code>Solid</code>, if any exist. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: valarray&lt;real&gt; <b>projective_extremes</b><var><a name="index-projective_005fextremes-783"></a></var><br>
+ <blockquote><p>The maximum and minimum values for the x, y, and z-coordinates of the
+ <code>Points</code> belonging to the <code>Solid</code>.  Used in
+ <code>Picture::output()</code> for testing whether a <code>Solid</code> is
+ projectable using a particular set of arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Public static <code>const</code> variables: unsigned short <b>CIRCLE</b><var><a name="index-CIRCLE-784"></a></var><br>
+ &mdash; : unsigned short <b>ELLIPSE</b><var><a name="index-ELLIPSE-785"></a></var><br>
+ &mdash; : unsigned short <b>PATH</b><var><a name="index-PATH-786"></a></var><br>
+ &mdash; : unsigned short <b>RECTANGLE</b><var><a name="index-RECTANGLE-787"></a></var><br>
+ &mdash; : unsigned short <b>REG_POLYGON</b><var><a name="index-REG_005fPOLYGON-788"></a></var><br>
+ <blockquote><p>Used as arguments in the functions <code>get_shape_ptr()</code> and
+ <code>get_shape_center()</code>
+ (see <a href="#Returning-Elements-and-Information-Solids">Returning Elements and Information</a>). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Solid-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solid-Destructor">Solid Destructor</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Data-Members">Solid Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: <code>void</code> <b>Solid</b> (<code>void</code>)<var><a name="index-Solid-789"></a></var><br>
+ <blockquote><p>Creates an empty <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: <code>void</code> <b>Solid</b> (<var>const Solid&amp; s</var>)<var><a name="index-Solid-790"></a></var><br>
+ <blockquote><p>Creates a new <code>Solid</code> and makes it a copy of <var>s</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Solid* <b>create_new&lt;Solid&gt;</b> (<var>const Solid* s</var>)<var><a name="index-create_005fnew_003cSolid_003e-791"></a></var><br>
+ &mdash; : Solid* <b>create_new&lt;Solid&gt;</b> (<var>const Solid&amp; s</var>)<var><a name="index-create_005fnew_003cSolid_003e-792"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Solids</code>. 
+ They create a <code>Solid</code> on the free store and allocate memory for it using
+ <code>new(Solid)</code>.  They return a pointer to the new <code>Solid</code>.
+ 
+         <p>If <var>s</var> is a non-zero pointer or a reference,
+ the new <code>Solid</code> will be a copy of
+ <var>s</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Solid&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Solid-Destructor"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Solid-Operators">Solid Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.3 Destructor</h3>
+ 
+ <div class="defun">
+ &mdash; <code>virtual</code> Destructor: void <b>~Solid</b> (<code>void</code>)<var><a name="index-g_t_007eSolid-793"></a></var><br>
+ <blockquote><p>This function currently has an empty definition, but its existence
+ prevents GCC 3.3 from issuing the following warning:
+ &ldquo;`class Solid' has virtual functions but non-virtual destructor&rdquo;. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Solid-Operators"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Copying-Solids">Copying Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Destructor">Solid Destructor</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.4 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: const Solid&amp; <b>operator=</b> (<var>const Solid&amp; s</var>)<var><a name="index-operator_003d-794"></a></var><br>
+ <blockquote><p>Assignment operator.  Makes <code>*this</code> a copy of <var>s</var>, discarding
+ the old contents of <code>*this</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: Transform <b>operator*=</b> (<var>const Transform&amp; t</var>)<var><a name="index-operator_002a_003d-795"></a></var><br>
+ <blockquote><p>Multiplication by a <code>Transform</code>.  All of the <code>Shapes</code> that
+ make up the <code>Solid</code> are transformed by <var>t</var>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Copying-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Setting-Solid-Members">Setting Solid Members</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Operators">Solid Operators</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.5 Copying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_copy</b> (<code>void</code>)<var><a name="index-get_005fcopy-796"></a></var><br>
+ <blockquote><p>Dynamically allocates a new <code>Solid</code> on the free store, using
+ <code>create_new&lt;Solid&gt;()</code>, and makes it a copy of <code>*this</code>.  Then, a
+ pointer to <code>Shape</code> is pointed at the copy and returned.  Used for
+ putting <code>Solids</code> onto <code>Picture::shapes</code> in the drawing and
+ filling functions for <code>Solid</code>. 
+ See <a href="#Drawing-and-Filling-Solids">Solid Reference; Drawing and Filling</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Setting-Solid-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Querying-Solids">Querying Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Copying-Solids">Copying Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.6 Setting Members</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_on_free_store</b> ([<var>bool b = </var><code>true</code>])<var><a name="index-set_005fon_005ffree_005fstore-797"></a></var><br>
+ <blockquote><p>Sets <code>on_free_store</code> to <var>b</var>.  This function is
+ called in the  template function
+ <code>create_new()</code>. 
+ See <a href="#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Querying-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Setting-Solid-Members">Setting Solid Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.7 Querying</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: bool <b>is_on_free_store</b> (<code>void</code>)<var><a name="index-is_005fon_005ffree_005fstore-798"></a></var><br>
+ <blockquote><p>Returns the value of <code>on_free_store</code>; <code>true</code>, if the
+ <code>Solid</code> was dynamically allocated on the free store, otherwise
+ <code>false</code>. 
+ <code>Solids</code>, and objects of classes derived from <code>Solid</code>,
+ should only ever be allocated on the free store by
+ a specialization of the template function <code>create_new()</code>. 
+ See <a href="#Solid-Constructors-and-Setting-Functions">Solid Reference; Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Returning-Elements-and-Information-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Showing-Solids">Showing Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Querying-Solids">Querying Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.8 Returning Elements and Information</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: const Point&amp; <b>get_center</b> (<var>void</var>)<var><a name="index-get_005fcenter-799"></a></var><br>
+ <blockquote><p>Returns <code>center</code>.  If the <code>Solid</code> doesn't
+ have a meaningful center, the return value will probably be
+ <code>INVALID_POINT</code>. 
+ </p></blockquote></div>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>
+ <li><a accesskey="2" href="#Getting-Shapes-Solids">Getting Shapes Solids</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Getting-Shape-Centers-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Getting-Shapes-Solids">Getting Shapes Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ 
+ </div>
+ 
+ <h4 class="unnumberedsubsec">Getting Shape Centers</h4>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: const Point&amp; <b>get_shape_center</b> (<var>const unsigned short shape_type, const unsigned short s</var>)<var><a name="index-get_005fshape_005fcenter-800"></a></var><br>
+ <blockquote><p>Returns the <code>center</code> of a <code>Shape</code> belonging to the <code>Solid</code>. 
+ Currently, the object can be a <code>Circle</code>, <code>Ellipse</code>,
+ <code>Rectangle</code>, or <code>Reg_Polygon</code>, and it is accessed through a pointer
+ on one of the following vectors of pointers to <code>Shape</code>:
+ <code>circles</code>, <code>ellipses</code>,
+ <code>rectangles</code>, or <code>reg_polygons</code>. 
+ The type of
+ object is specified
+ using the <var>shape_type</var> argument. 
+ The following <code>public static const</code> data members of <code>Solid</code>
+ can (and probably should) be passed as the <var>shape_type</var> argument:
+ <code>CIRCLE</code>, <code>ELLIPSE</code>, <code>RECTANGLE</code>, and
+ <code>REG_POLYGON</code>.
+ 
+         <p>The argument <var>s</var> is used to index the vector.
+ 
+         <p>This function is called within the more specialized functions in this
+ section, namely: <code>get_circle_center()</code>,
+ <code>get_ellipse_center()</code>, <code>get_rectangle_center()</code>, and
+ <code>get_reg_polygon_center()</code>.  I don't expect it to be needed in user
+ code very often.
+ 
+      <pre class="example">          Dodecahedron d(origin, 3);
+           d.filldraw();
+           Point C = d.get_shape_center(Solid::REG_POLYGON, 1);
+           C.dotlabel("C");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF182.png"
+ alt="[Figure 182. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 182. 
+ <br>
+ </p>
+ 
+      <!-- !! NOTE.  LDF 2003.08.15. -->
+         <p>Note that this function will have to be changed, if new vectors of
+ <code>Shape</code> pointers are added to <code>class Solid</code>! 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: const Point&amp; <b>get_circle_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fcircle_005fcenter-801"></a></var><br>
+ &mdash; : const Point&amp; <b>get_ellipse_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fellipse_005fcenter-802"></a></var><br>
+ &mdash; : const Point&amp; <b>get_rectangle_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005frectangle_005fcenter-803"></a></var><br>
+ &mdash; : const Point&amp; <b>get_reg_polygon_center</b> (<var>const unsigned short s</var>)<var><a name="index-get_005freg_005fpolygon_005fcenter-804"></a></var><br>
+ <blockquote><p>These functions all return the center of the <code>Shape</code> pointed to by a pointer on
+ one of the vectors of <code>Shapes</code> belonging to the <code>Solid</code>.  The argument <var>s</var>
+ indicates which element on the vector is to be accessed.  For example,
+ <code>get_rectangle_center(2)</code> returns the center of the
+ <code>Rectangle</code> pointed to by <code>rectangles[2]</code>.
+ 
+      <pre class="example">          Cuboid c(origin, 3, 4, 5, 0, 30);
+           c.draw();
+           for (int i = 0; i &lt; 6; ++i)
+             c.get_rectangle_center(i).label(i, "");
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF183.png"
+ alt="[Figure 183. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 183. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Getting-Shapes-Solids"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>
+ 
+ </div>
+ 
+ <h4 class="unnumberedsubsec">Getting Shapes</h4>
+ 
+ <p>The functions in this section
+ all return <code>const</code> pointers to <code>Shape</code>, or one of its derived
+ classes. Therefore, they must be invoked in such a way, that
+ the <code>const</code> qualifier is not discarded.  See
+ the description of <code>get_reg_polygon_ptr()</code> below, for an example.
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: Shape* <b>get_shape_ptr</b> (<var>const unsigned short shape_type, const unsigned short s</var>)<var><a name="index-get_005fshape_005fptr-805"></a></var><br>
+ <blockquote><p>Copies one of the objects belonging to the <code>Solid</code>, and returns a
+ pointer to <code>Shape</code> that points to the copy. 
+ The object is found by dereferencing one of the pointers on one of the
+ vectors of pointers belonging to the <code>Solid</code>. 
+ Currently, these
+ vectors are <code>circles</code>, <code>ellipses</code>, <code>paths</code>,
+ <code>rectangles</code>, and <code>reg_polygons</code>.  The argument
+ <var>shape_type</var> specifies the vector, and the
+ argument <var>s</var> specifies which element of the vector should be
+ accessed.  The following <code>public static const</code> data members of
+ <code>Solid</code> can (and probably should) be passed as the <var>shape_type</var>
+ argument: <code>CIRCLE</code>, <code>ELLIPSE</code>, <code>PATH</code>, <code>RECTANGLE</code>,
+ and <code>REG_POLYGON</code>.
+ 
+         <p>This function was originally intended to be called within the more
+ specialized functions in this
+ section, namely: <code>get_circle_ptr()</code>, <code>get_ellipse_ptr()</code>,
+ <code>get_path_ptr()</code>, <code>get_rectangle_ptr</code>, and <code>get_reg_polygon_ptr</code>. 
+ However, these functions no longer use <code>get_shape_ptr()</code>, so this
+ function is probably no longer needed.
+ 
+      <pre class="example">          Icosahedron I(origin, 3);
+           I.filldraw();
+           Reg_Polygon* t =
+           static_cast&lt;Reg_Polygon*&gt;(I.get_shape_ptr(Solid::REG_POLYGON, 9));
+           t-&gt;fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF184.png"
+ alt="[Figure 184. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 184. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: const Reg_Polygon* <b>get_circle_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fcircle_005fptr-806"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_ellipse_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fellipse_005fptr-807"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_path_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005fpath_005fptr-808"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_rectangle_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005frectangle_005fptr-809"></a></var><br>
+ &mdash; : const Reg_Polygon* <b>get_reg_polygon_ptr</b> (<var>const unsigned short s</var>)<var><a name="index-get_005freg_005fpolygon_005fptr-810"></a></var><br>
+ <blockquote><p>Each of these functions returns a pointer from one of the vectors of
+ <code>Shape</code> pointers belonging to the <code>Solid</code>.  The argument <var>s</var>
+ specifies which element of the appropriate vector should be returned. 
+ For example, <code>get_reg_polygon_ptr(2)</code> returns the <code>Reg_Polygon*</code>
+ in <code>reg_polygons[2]</code>.
+ 
+         <p>Since these functions return <code>const</code> pointers, they must be invoked
+ in such a way, that the <code>const</code> qualifier is not discarded, as
+ noted at the beginning of this section.  The following example
+ demonstrates two ways of invoking <code>get_reg_polygon_ptr()</code>:
+ 
+      <pre class="example">          Dodecahedron d(origin, 3);
+           d.draw();
+           const Reg_Polygon* ptr = d.get_reg_polygon_ptr(0);
+           ptr-&gt;draw(black, "evenly scaled 4", "pencircle scaled 1mm");
+           Reg_Polygon A = *d.get_reg_polygon_ptr(5);
+           A.fill(gray);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF185.png"
+ alt="[Figure 185. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 185. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Showing-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.9 Showing</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: <code>void</code> <b>show</b> ([<var>string text = "", </var>[<var>char coords = 'w', </var>[<var>const bool do_persp = </var><code>true</code><var>, </var>[<var>const bool do_apply = </var><code>true</code><var>, </var>[<var>Focus* f = 0, </var>[<var>const unsigned short proj = </var><code>Projections::PERSP</code><var>, </var>[<var>const real factor = 1</var>]]]]]]])<var><a name="index-show-811"></a></var><br>
+ <blockquote><p>Prints <var>text</var> and the value of <code>on_free_store</code> to the standard
+ output (<code>stdout</code>), and then calls
+ <code>show()</code> on the objects pointed to by the pointers on
+ <code>paths</code>, <code>circles</code>, <code>ellipses</code>, <code>reg_polygons</code>, and
+ <code>rectangles</code>, unless the vectors are empty.  The arguments are
+ passed to <code>Path::show()</code>, <code>Ellipse::show()</code>, etc.  If a vector
+ is empty, a message to this effect is printed to the standard output. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Affine-Transformations-for-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Showing-Solids">Showing Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.10 Affine Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual functions: Transform <b>scale</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-scale-812"></a></var><br>
+ <blockquote><p><code>Solid</code>.
+ 
+    &mdash; : Transform <b>shear</b> (<var>real xy, </var>[<var>real xz = 0, </var>[<var>real yx = 0, </var>[<var>real yz = 0, </var>[<var>real zx = 0, </var>[<var>real zy = 0</var>]]]]])<var><a name="index-shear-813"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>real x, </var>[<var>real y = 0, </var>[<var>real z = 0</var>]])<var><a name="index-shift-814"></a></var><br>
+ &mdash; : Transform <b>shift</b> (<var>const Point&amp; pt</var>)<var><a name="index-shift-815"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const real x, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]])<var><a name="index-rotate-816"></a></var><br>
+ &mdash; : Transform <b>rotate</b> (<var>const Point&amp; p0, const Point&amp; p1, </var>[<var>const real angle = 180</var>])<var><a name="index-rotate-817"></a></var><br>
+ <blockquote><p>These functions perform the corresponding transformations on all of the
+ <code>Shapes</code> belonging to the <code>Solid</code>. 
+ See <a href="#Affine-Transformations-for-Transforms">Transform Reference; Affine Transformations</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Applying-Transformations-to-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Outputting-Solids">Outputting Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.11 Applying Transformations</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>apply_transform</b> (<code>void</code>)<var><a name="index-apply_005ftransform-818"></a></var><br>
+ <blockquote><p>Calls <code>apply_transform()</code> on all of the <code>Shapes</code> belonging to
+ the <code>Solid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Outputting-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Applying-Transformations-to-Solids">Applying Transformations to Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.12 Outputting</h3>
+ 
+ <p>The functions in this section are are called, directly or indirectly, by
+ <code>Picture::output()</code>. 
+ See <a href="#Outputting-Pictures">Picture Reference; Outputting</a>.
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>output</b> (<code>void</code>)<var><a name="index-output-819"></a></var><br>
+ <blockquote><p>Writes the MetaPost code for drawing, filling, filldrawing, undrawing,
+ unfilling, or unfilldrawing the <code>Solid</code> to <code>out_stream</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>suppress_output</b> (<code>void</code>)<var><a name="index-suppress_005foutput-820"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Sets <code>do_output</code> to <code>false</code>, if the
+ <code>Solid</code> cannot be projected using a particular set of arguments to
+ <code>Picture::output()</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>unsuppress_output</b> (<code>void</code>)<var><a name="index-unsuppress_005foutput-821"></a></var><br>
+ <blockquote><p>Used in <code>Picture::output()</code>.  Resets <code>do_output</code> to <code>true</code>,
+ so that the <code>Solid</code> will be tested for projectability again, if the
+ <code>Picture</code> it's on is output again. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: vector&lt;Shape*&gt; <b>extract</b> (<var>const Focus&amp; f, const unsigned short proj, real factor</var>)<var><a name="index-extract-822"></a></var><br>
+ <blockquote><p>Tests whether all of the <code>Shapes</code> belonging to the <code>Solid</code> are
+ projectable, using the arguments passed to <code>output()</code>.  If it is,
+ this function returns a
+ vector of pointers to <code>Shape</code> containing a single pointer to
+ the <code>Solid</code>.  If not, an empty vector is returned. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Virtual function: bool <b>set_extremes</b> (<code>void</code>)<var><a name="index-set_005fextremes-823"></a></var><br>
+ <blockquote><p>Sets <code>projective_extremes</code> to contain the maximum and minimum
+ values for the x, y, and z-coordinates of the <code>Points</code> on the
+ <code>Shape</code>.  Used for determining projectability of a <code>Solid</code>
+ using a particular set of arguments. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> inline virtual function: const valarray&lt;real&gt; <b>get_extremes</b> (<code>void</code>)<var><a name="index-get_005fextremes-824"></a></var><br>
+ <blockquote><p>Returns <code>projective_extremes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual functions: real <b>get_minimum_z</b> (<code>void</code>)<var><a name="index-get_005fminimum_005fz-825"></a></var><br>
+ &mdash; : real <b>get_maximum_z</b> (<code>void</code>)<var><a name="index-get_005fmaximum_005fz-826"></a></var><br>
+ &mdash; : real <b>get_mean_z</b> (<code>void</code>)<var><a name="index-get_005fmean_005fz-827"></a></var><br>
+ <blockquote><p>Returns the minimum, maximum, or mean z-value, respectively, of the
+ <code>Points</code> belonging to the <code>Solid</code>. 
+ Used for surface hiding. 
+ See <a href="#Surface-Hiding">Surface Hiding</a>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Drawing-and-Filling-Solids"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Clearing-Solids">Clearing Solids</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Outputting-Solids">Outputting Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.13 Drawing and Filling</h3>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>draw</b> ([<var>const vector&lt;const Color*&gt; v = </var><code>Colors::default_color_vector</code><var>, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]])<var><a name="index-draw-828"></a></var><br>
+ <blockquote><p>Draws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of
+ <code>*this</code>, and puts a pointer to the copy onto
+ <var>picture</var><code>.shapes</code>.  The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be drawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for drawing the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>v</var>.  If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>v</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>v</var> is used to draw
+ the remaining <code>Shapes</code>.
+ 
+         <p>Currently, a <code>Solid</code> can
+ only be drawn with a single dash pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>fill</b> ([<var>const vector&lt;const Color*&gt; v = </var><code>Colors::default_color_vector</code><var>, </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]])<var><a name="index-fill-829"></a></var><br>
+ <blockquote><p>Fills the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code> makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be filled,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for filling the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>v</var>. 
+ If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>v</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>v</var> is used to fill
+ the remaining <code>Shapes</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>filldraw</b> ([<var>const vector&lt;const Color*&gt; draw_colors = Colors::default_color_vector, </var>[<var>const vector&lt;const Color*&gt; fill_colors = Colors::background_color_vector, </var>[<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]]]])<var><a name="index-filldraw-830"></a></var><br>
+ <blockquote><p>Filldraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var><code>.shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be filldrawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>The <code>Colors</code> used
+ for drawing and filling the various
+ <code>Paths</code>, <code>Circles</code>, <code>Ellipses</code>, etc., belonging to the
+ <code>Solid</code> are passed in <var>draw_colors</var> and <var>fill_colors</var>. 
+ If the <code>Solid</code> contains more
+ <code>Shapes</code> than <var>draw_colors</var> contains pointers to <code>Color</code>, the
+ <code>Color</code> pointed to by the last pointer on <var>draw_colors</var> is used to draw
+ the remaining <code>Shapes</code>.  The same applies to <code>fill_colors</code>.
+ 
+         <p>Currently, a <code>Solid</code> can only be filldrawn with a single dash
+ pattern (<var>ddashed</var>), and pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>undraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-831"></a></var><br>
+ <blockquote><p>Undraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be undrawn,
+ when <code>Picture::output()</code> is called.
+ 
+         <p>A <code>Solid</code> can currently only be undrawn using a single dash
+ pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>unfill</b> ([<var>Picture&amp; picture = </var><code>current_picture</code>])<var><a name="index-unfill-832"></a></var><br>
+ <blockquote><p>Unfills the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code> makes it a copy of
+ <code>*this</code>, and puts a pointer to it onto <var>picture</var>.<code>shapes</code>. 
+ The data members of the <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be unfilled,
+ when <code>Picture::output()</code> is called.
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; <code>const</code> virtual function: void <b>unfilldraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-unfilldraw-833"></a></var><br>
+ &mdash; <code>const</code> virtual function: void <b>undraw</b> ([<var>const string ddashed = "", </var>[<var>const string ppen = "", </var>[<var>Picture&amp; picture = </var><code>current_picture</code>]]])<var><a name="index-undraw-834"></a></var><br>
+ <blockquote><p>Unfilldraws the <code>Solid</code>.
+ 
+         <p>This function allocates a new <code>Solid</code>, makes it a copy of
+ <code>*this</code>, and puts a
+ pointer to it onto <var>picture</var>.<code>shapes</code>.  The data members of the
+ <code>Shapes</code>
+ belonging to the copy are set appropriately, so that they can be
+ unfilldrawn, when <code>Picture::output()</code> is called.
+ 
+         <p>A <code>Solid</code> can currently only be unfilldrawn using a single dash
+ pattern (<var>ddashed</var>), and
+ pen (<var>ppen</var>). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Clearing-Solids"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Solid-Reference">Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">34.14 Clearing</h3>
+ 
+ <div class="defun">
+ &mdash; Virtual function: void <b>clear</b> (<code>void</code>)<var><a name="index-clear-835"></a></var><br>
+ <blockquote><p>Calls <code>clear()</code> on all the <code>Shapes</code> belonging to the
+ <code>Solid</code>. 
+ Used in <code>Picture::clear()</code> for deallocating
+ and destroying <code>Solids</code>.
+ 
+         <p>Currently, &lt;<var>Shape</var>&gt;.<code>clear()</code> always resolves to
+ <code>Path::clear()</code>, since none of the other types of <code>Shape</code> that a
+ <code>Solid</code> can contain, e.g., <code>Ellipse</code>, <code>Circle</code>, etc.,
+ overloads <code>Path::clear()</code>. 
+ </p></blockquote></div>
+ 
+ <!-- solfaced.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Faced-Solid-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Cuboid-Reference">Cuboid Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Solid-Reference">Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">35 Faced Solid Reference</h2>
+ 
+ <p><a name="index-Solid_005fFaced-836"></a>Class <code>Solid_Faced</code> is defined in <samp><span class="file">solfaced.web</span></samp>. 
+ It is derived from <code>Solid</code> using public derivation.
+ 
+    <p><code>Solid_Faced</code> currently has no member functions.  It is intended
+ for use as a base class.  The classes <code>Cuboid</code> and
+ <code>Polyhedron</code> are derived from <code>Solid_Faced</code>. 
+ See <a href="#Cuboid-Reference">Cuboid Reference</a>, and <a href="#Polyhedron-Reference">Polyhedron Reference</a>.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Solid_Faced-Data-Members"></a>
+ <a name="Solid_005fFaced-Data-Members"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Faced-Solid-Reference">Faced Solid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">35.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>faces</b><var><a name="index-faces-837"></a></var><br>
+ <blockquote><p>The number of faces of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>vertices</b><var><a name="index-vertices-838"></a></var><br>
+ <blockquote><p>The number of vertices of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>edges</b><var><a name="index-edges-839"></a></var><br>
+ <blockquote><p>The number of edges of the <code>Solid_Faced</code>. 
+ </p></blockquote></div>
+ 
+ <!-- cuboid.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Cuboid-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Polyhedron-Reference">Polyhedron Reference</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Faced-Solid-Reference">Faced Solid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">36 Cuboid Reference</h2>
+ 
+ <p><a name="index-Cuboid-840"></a>Class <code>Cuboid</code> is defined in <samp><span class="file">cuboid.web</span></samp>. 
+ It is derived from <code>Solid_Faced</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Cuboid-Data-Members">Cuboid Data Members</a>
+ <li><a accesskey="2" href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Cuboid-Operators">Cuboid Operators</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Cuboid-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Cuboid-Reference">Cuboid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Cuboid-Reference">Cuboid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">36.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variables: real <b>height</b><var><a name="index-height-841"></a></var><br>
+ &mdash; : real <b>width</b><var><a name="index-width-842"></a></var><br>
+ &mdash; : real <b>depth</b><var><a name="index-depth-843"></a></var><br>
+ <blockquote><p>The height, width, and depth of the <code>Cuboid</code>, respectively.
+ 
+         <p>Please note, that &ldquo;<code>height</code>&rdquo;, &ldquo;<code>width</code>&rdquo;, and
+ &ldquo;<code>depth</code>&rdquo; are conventional terms.  There are no restrictions on
+ the orientation of a <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Cuboid-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Cuboid-Operators">Cuboid Operators</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Cuboid-Data-Members">Cuboid Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Cuboid-Reference">Cuboid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">36.2 Constructors and Setting Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Cuboid</b> (<code>void</code>)<var><a name="index-Cuboid-844"></a></var><br>
+ <blockquote><p>Creates an empty <code>Cuboid</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Copy constructor: void <b>Cuboid</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-Cuboid-845"></a></var><br>
+ <blockquote><p>Creates a new <code>Cuboid</code> and makes it a copy of <var>c</var>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Cuboid</b> (<var>const Point&amp; c, const real h, const real w, const real d, </var>[<var>const real x = 0, </var>[<var>const real y = 0, </var>[<var>const real z = 0</var>]]])<var><a name="index-Cuboid-846"></a></var><br>
+ <blockquote><p>Creates a <code>Cuboid</code> with <code>center</code> at the origin, with
+ <code>height</code> == <var>h</var>, <code>width</code> == <var>w</var>, and
+ <code>depth</code> == <var>d</var>.  If <var>x</var>, <var>y</var>, or <var>z</var> is
+ non-zero, the <code>Cuboid</code> is rotated by the amounts indicated around
+ the corresponding main axes.  Finally, the
+ <code>Cuboid</code> is shifted such that <code>center</code> comes to lie at
+ <var>c</var>.
+ 
+      <pre class="example">          Point P(-3, -2, 12);
+           Cuboid c(P, 3, 5, 2.93, 35, 10, 60);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF186.png"
+ alt="[Figure 186. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 186. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Template specializations: Cuboid* <b>create_new&lt;Cuboid&gt;</b> (<var>const Cuboid* c</var>)<var><a name="index-create_005fnew_003cCuboid_003e-847"></a></var><br>
+ &mdash; : Cuboid* <b>create_new&lt;Cuboid&gt;</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-create_005fnew_003cCuboid_003e-848"></a></var><br>
+ <blockquote><p>Pseudo-constructors for dynamic allocation of <code>Cuboids</code>. 
+ They create a <code>Cuboid</code> on the free store and allocate memory for it using
+ <code>new(Cuboid)</code>.  They return a pointer to the new <code>Cuboid</code>.
+ 
+         <p>If <var>c</var> is a non-zero pointer or a reference,
+ the new <code>Cuboid</code> will be a copy of
+ <var>c</var>.  If the new object is not meant to be a
+ copy of an existing one, &lsquo;<samp><span class="samp">0</span></samp>&rsquo; must be passed to
+ <code>create_new&lt;Cuboid&gt;()</code> as its argument. 
+ See <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a>, for more information. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Destructor: void <b>~Cuboid</b> (<code>void</code>)<var><a name="index-g_t_007eCuboid-849"></a></var><br>
+ <blockquote><p>Deallocates the <code>Rectangles</code> pointed to by the pointers on
+ <code>rectangles</code> (a <code>Solid</code> data member), and calls
+ <code>rectangles.clear()</code>.  <code>Cuboids</code> consist entirely of
+ <code>Rectangles</code>, so nothing must be done to the other vectors. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Cuboid-Operators"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Cuboid-Reference">Cuboid Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">36.3 Operators</h3>
+ 
+ <div class="defun">
+ &mdash; Assignment operator: void <b>operator=</b> (<var>const Cuboid&amp; c</var>)<var><a name="index-operator_003d-850"></a></var><br>
+ <blockquote><p>Makes the <code>Cuboid</code> a copy of <var>c</var>.  The old contents of <code>*this</code>
+ are deallocated (where necessary) and discarded. 
+ </p></blockquote></div>
+ 
+ <!-- polyhed.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Polyhedron-Reference"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Utility-Functions">Utility Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Cuboid-Reference">Cuboid Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">37 Polyhedron Reference</h2>
+ 
+ <p><a name="index-Polyhedron-851"></a>Class <code>Polyhedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Solid_Faced</code> using public derivation.  It is
+ intended for use as a base class for specific types of polyhedra. 
+ Currently, the classes <code>Tetrahedron</code>, <code>Dodecahedron</code>,
+ <code>Icosahedron</code>, and <code>Trunc_Octahedron</code> (truncated octahedron)
+ are derived from <code>Polyhedron</code>.
+ 
+    <p>There is a great deal of work left to do on the polyhedra.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Polyhedron-Data-Members">Polyhedron Data Members</a>
+ <li><a accesskey="2" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ <li><a accesskey="3" href="#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Polyhedron-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polyhedron-Reference">Polyhedron Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Reference">Polyhedron Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">37.1 Data Members</h3>
+ 
+ <div class="defun">
+ &mdash; Protected variable: unsigned short <b>number_of_polygon_types</b><var><a name="index-number_005fof_005fpolygon_005ftypes-852"></a></var><br>
+ <blockquote><p>The number of different types of polygon making up the faces of a
+ <code>Polyhedron</code>.  The Platonic polyhedra have only one type of face,
+ while the Archimedean can have more. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>face_radius</b><var><a name="index-face_005fradius-853"></a></var><br>
+ <blockquote><p>The radius of the sphere that touches the centers of the polygonal faces
+ of the polyhedron (<em>Inkugel</em>, in German). 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>edge_radius</b><var><a name="index-edge_005fradius-854"></a></var><br>
+ <blockquote><p>The radius of the sphere that touches the centers of the edges of the
+ polyhedron. 
+ <!-- ?? GERMAN TERM?? IS IT ALWAYS THE CENTERS?? -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>vertex_radius</b><var><a name="index-vertex_005fradius-855"></a></var><br>
+ <blockquote><p>The radius of the sphere touching the vertices of the polyhedron
+ (<em>Umkugel</em>, in German). 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Regular-Platonic-Polyhedra"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polyhedron-Data-Members">Polyhedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Reference">Polyhedron Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">37.2 Regular Platonic Polyhedra</h3>
+ 
+ <p>3DLDF currently has classes for three of the five regular Platonic
+ polyhedra: <code>Tetrahedron</code>, <code>Dodecahedron</code>, and
+ <code>Icosahedron</code>.  There is no need for a special <code>Cube</code> class,
+ because cubes can be created using <code>Cuboid</code> with equal width,
+ height, and depth arguments (see <a href="#Cuboid-Reference">Cuboid Reference</a>).  <code>Octahedron</code> is
+ missing at the moment, but I plan to add it soon.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Tetrahedron">Tetrahedron</a>
+ <li><a accesskey="2" href="#Dodecahedron">Dodecahedron</a>
+ <li><a accesskey="3" href="#Icosahedron">Icosahedron</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Tetrahedron"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Dodecahedron">Dodecahedron</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">37.2.1 Tetrahedron</h4>
+ 
+ <p><a name="index-Tetrahedron-856"></a>Class <code>Tetrahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Tetrahedron-Data-Members">Tetrahedron Data Members</a>
+ <li><a accesskey="2" href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Tetrahedron-Net">Tetrahedron Net</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Tetrahedron-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Tetrahedron">Tetrahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Tetrahedron">Tetrahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-857"></a></var><br>
+ <blockquote><p>The angle in radians between the faces of the <code>Tetrahedron</code>, namely
+ 70 degrees
+  32'
+ . 
+ Only
+ the Platonic polyhedra have a single dihedral angle, so
+ <code>dihedral_angle</code> is not a member of
+ <code>Polyhedron</code>.  This means that it must be a member of all of the
+ classes representing Platonic polyhedra. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>triangle_radius</b><var><a name="index-triangle_005fradius-858"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a triangular face of the
+ <code>Tetrahedron</code>. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Tetrahedron-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Tetrahedron-Net">Tetrahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Tetrahedron-Data-Members">Tetrahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Tetrahedron">Tetrahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Tetrahedron</b> (<code>void</code>)<var><a name="index-Tetrahedron-859"></a></var><br>
+ <blockquote><p>Creates an empty <code>Tetrahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Tetrahedron</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Tetrahedron-860"></a></var><br>
+ <blockquote><p>Creates a <code>Tetrahedron</code> with its center at the origin. 
+ The faces have enclosing circles of diameter
+ <var>diameter_of_triangle</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Tetrahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Tetrahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+         <p>The center of a <code>Tetrahedron</code> is the intersection of the line
+ segments connecting the vertices with the centers of the opposite
+ faces.
+ 
+      <pre class="example">          Tetrahedron t(origin, 3);
+           t.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF187.png"
+ alt="[Figure 187. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 187. 
+ <br>
+ </p>
+ 
+      <pre class="example">          Point P(1, 0, 1);
+           Tetrahedron t(P, 2.75, 30, 32.5, 20);
+           t.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF188.png"
+ alt="[Figure 188. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 188. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Setting function: void <b>set</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-set-861"></a></var><br>
+ <blockquote><p>Corresponds to the constructor above. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Tetrahedron-Net"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Tetrahedron">Tetrahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.1.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real triangle_diameter</var>)<var><a name="index-get_005fnet-862"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn> of the <code>Tetrahedron</code>, i.e., the
+ two-dimensional pattern of triangles that can be folded into
+ a model of a tetrahedron.<a rel="footnote" href="#fn-45" name="fnd-45"><sup>45</sup></a>
+ The net lies in the x-z plane.  The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>.  The center
+ of the middle triangle is at the origin.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Tetrahedron::get_net(2);
+           for (vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+                iter != vrp.end();
+                ++iter)
+             {
+               (**iter).draw();
+             }
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF189.png"
+ alt="[Figure 189. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 189. 
+ <br>
+ </p>
+ 
+         <p>This function is used in the non-default constructor. 
+ See <a href="#Tetrahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Tetrahedron; Constructors and Setting Functions</a>. 
+ The constructor starts with the net and rotates three of the triangles
+ about the adjacent vertices of the middle triangle.  Currently, all of
+ the <code>Polyhedron</code> constructors work this way. 
+ However, this is not ideal, because rotation uses the sine and cosine
+ functions, which cause inaccuracies to creep in. 
+ I think there must be a better way of constructing <code>Polyhedra</code>, but
+ I haven't found one yet.
+ 
+         <p>The <code>Polyhedron</code> constructors are also especially
+ sensitive to changes made to <code>Transform::align_with_axis()</code>. 
+ I have already had to rewrite them twice, and since
+ <code>Transform::align_with_axis()</code> may need to be changed or rewritten
+ again, it's possible that the <code>Polyhedron</code> constructors will have
+ to be, too.  It has also occurred in the past, that the <code>Polyhedra</code>
+ were constructed correctly on one platform, using a particular compiler,
+ but not on another platform, using a different compiler. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real triangle_diameter, </var>[<var>bool make_tabs = </var><code>true</code>])<var><a name="index-draw_005fnet-863"></a></var><br>
+ <blockquote><p>Draws the net for a <code>Tetrahedron</code> in the x-y plane. 
+ The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>.  The
+ origin is used as the center of the middle triangle. 
+ The centers of the triangles are numbered. 
+ If the argument <var>make_tabs</var> is used, tabs for gluing and/or sewing a
+ cardboard model of the <code>Tetrahedron</code> together will be drawn, too. 
+ The dots on the tabs mark where to stick the needle through, when sewing
+ the model together (I've had good results with sewing).
+ 
+      <pre class="example">          Tetrahedron::draw_net(3, true);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF190.png"
+ alt="[Figure 190. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 190. 
+ <br>
+ </p>
+ 
+         <p>The net is drawn in the x-y plane, because it currently doesn't work to
+ draw it in the x-z plane.  I haven't gotten around to fixing this
+ problem yet. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Dodecahedron"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Icosahedron">Icosahedron</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Tetrahedron">Tetrahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">37.2.2 Dodecahedron</h4>
+ 
+ <p><a name="index-Dodecahedron-864"></a>Class <code>Dodecahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p>Dodecahedra have 12 regular pentagonal faces.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Dodecahedron-Data-Members">Dodecahedron Data Members</a>
+ <li><a accesskey="2" href="#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Dodecahedron-Net">Dodecahedron Net</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Dodecahedron-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dodecahedron">Dodecahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Dodecahedron">Dodecahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-865"></a></var><br>
+ <blockquote><p>The angle between the faces of the <code>Dodecahedron</code>,
+ namely
+ 116 degrees
+  34'
+  = \pi - \arctan(2). 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>pentagon_radius</b><var><a name="index-pentagon_005fradius-866"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a pentagonal face of the
+ <code>Dodecahedron</code>. 
+ <!-- !! TO DO:  Make illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Dodecahedron-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Dodecahedron-Net">Dodecahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dodecahedron-Data-Members">Dodecahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Dodecahedron">Dodecahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Dodecahedron</b> (<code>void</code>)<var><a name="index-Dodecahedron-867"></a></var><br>
+ <blockquote><p>Creates an empty <code>Dodecahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Dodecahedron</b> (<var>const Point&amp; p, const real pentagon_diameter, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Dodecahedron-868"></a></var><br>
+ <blockquote><p>Creates a <code>Dodecahedron</code> with its center at the origin, where the
+ pentagonal faces have enclosing circles of diameter
+ <var>pentagon_diameter</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Dodecahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Dodecahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+      <pre class="example">          Point P(-1, -2, 4);
+           Dodecahedron d(P, 3, 12.5, 16, 2);
+           d.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF191.png"
+ alt="[Figure 191. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 191. 
+ <br>
+ </p>
+ 
+      <pre class="example">          d.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF192.png"
+ alt="[Figure 192. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 192. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Dodecahedron-Net"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Dodecahedron">Dodecahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.2.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real pentagon_diameter, </var>[<var>bool do_half = false</var>])<var><a name="index-get_005fnet-869"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn>, i.e., the two-dimensional pattern of pentagons
+ that can be folded into a model of a dodecahedron.  The net lies
+ in the x-z plane.  The pentagons have enclosing circles of diameter
+ <var>pentagon_diameter</var>.  The center of the center pentagon of the first
+ half of the net is at the origin.  If the argument
+ <var>do_half</var> is <code>true</code>, only the first half of the
+ net is created.  This is used in the non-default constructor. 
+ See <a href="#Dodecahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Dodecahedron; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Dodecahedron::get_net(1);
+           for(vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+               iter != vrp.end(); ++iter)
+                  (**iter).draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF193.png"
+ alt="[Figure 193. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 193. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real pentagon_diameter, </var>[<var>bool portrait = </var><code>true</code><var>, </var>[<var>bool make_tabs = </var><code>true</code>]])<var><a name="index-draw_005fnet-870"></a></var><br>
+ <blockquote><p>Draws the net for a <code>Dodecahedron</code> in the x-z plane.  The pentagons
+ have enclosing circles of diameter <var>pentagon_diameter</var>.  The
+ origin is used as the center of the middle pentagon of the first half of
+ the net.  The centers of the pentagons are numbered.
+ 
+         <p>If the argument <var>portrait</var> is <code>true</code> (the default), the net
+ is arranged for printing in portrait format.  If it's <code>false</code>,
+ it's arranged for printing in landscape format.
+ 
+         <p>The argument <var>make_tabs</var> currently has no effect. 
+ When I get around to programming this, it will be used for specifying
+ whether tabs for gluing and/or sewing a cardboard model should be drawn,
+ too.
+ 
+      <pre class="example">          Dodecahedron::draw_net(1, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF194.png"
+ alt="[Figure 194. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 194. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Icosahedron"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Dodecahedron">Dodecahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">37.2.3 Icosahedron</h4>
+ 
+ <p><a name="index-Icosahedron-871"></a>Class <code>Icosahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p>Icosahedra have 20 regular triangular faces.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Icosahedron-Data-Members">Icosahedron Data Members</a>
+ <li><a accesskey="2" href="#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Icosahedron-Net">Icosahedron Net</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Icosahedron-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Icosahedron">Icosahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Icosahedron">Icosahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>dihedral_angle</b><var><a name="index-dihedral_005fangle-872"></a></var><br>
+ <blockquote><p>The angle between the faces of the <code>Icosahedron</code>, namely
+ 138 degrees
+  11'
+  = \pi - \arcsin(2/3). 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>triangle_radius</b><var><a name="index-triangle_005fradius-873"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a triangular face of
+ the <code>Icosahedron</code>. 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Icosahedron-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Icosahedron-Net">Icosahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Icosahedron-Data-Members">Icosahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Icosahedron">Icosahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Icosahedron</b> (<code>void</code>)<var><a name="index-Icosahedron-874"></a></var><br>
+ <blockquote><p>Creates an empty <code>Icosahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Icosahedron</b> (<var>const Point&amp; p, const real diameter_of_triangle, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Icosahedron-875"></a></var><br>
+ <blockquote><p>Creates an <code>Icosahedron</code> with its center at the origin, where the
+ triangular faces have enclosing circles of diameter
+ <var>diameter_of_triangle</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Icosahedron</code> is rotated by the
+ amounts specified around the corresponding axes.  Finally, if <var>p</var> is
+ not the origin, the <code>Icosahedron</code> is shifted such that
+ <code>center</code> comes to lie at <var>p</var>.
+ 
+      <pre class="example">          Icosahedron i(origin, 3, 0, 10);
+           i.draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF195.png"
+ alt="[Figure 195. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 195. 
+ <br>
+ </p>
+ 
+      <pre class="example">          i.filldraw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF196.png"
+ alt="[Figure 196. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 196. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <div class="node">
+ <a name="Icosahedron-Net"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Icosahedron">Icosahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.2.3.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real triangle_diameter, </var>[<var>bool do_half = </var><code>false</code>])<var><a name="index-get_005fnet-876"></a></var><br>
+ <blockquote><p>Returns the <dfn>net</dfn>, i.e., the two-dimensional pattern of triangles
+ that can be folded into a model of an icosahedron.  The net lies
+ in the x-z plane.  The triangles have enclosing circles of diameter
+ <var>triangle_diameter</var>. 
+ If the argument <var>do_half</var> = <code>true</code>, only the first half of the
+ net is created.  This is used in the non-default constructor. 
+ See <a href="#Icosahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Icosahedron; Constructors and Setting Functions</a>.
+ 
+      <pre class="example">          vector&lt;Reg_Polygon*&gt; vrp = Icosahedron::get_net(1.5);
+           for (vector&lt;Reg_Polygon*&gt;::iterator iter = vrp.begin();
+                iter != vrp.end(); ++iter)
+              (**iter).draw();
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF197.png"
+ alt="[Figure 197. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 197. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Static function: void <b>draw_net</b> (<var>const real triangle_diameter, </var>[<var>bool portrait = true, </var>[<var>bool make_tabs = </var><code>true</code>]])<var><a name="index-draw_005fnet-877"></a></var><br>
+ <blockquote><p>Draws the net for an <code>Icosahedron</code> in the x-z plane.  The triangles
+ have enclosing circles of diameter <var>triangle_diameter</var>. 
+ If the argument <var>portrait</var> is <code>true</code> (the default), the net
+ will be arranged for printing in portrait format.  If it's <code>false</code>,
+ it will be arranged for printing in landscape format. 
+ In portrait format, the center of the bottom right triangle is at the
+ origin.  In landscape format, the center of the bottom left
+ triangle is at the origin.  The triangles are numbered.
+ 
+         <p>The argument <var>make_tabs</var> currently has no effect. 
+ When I get around to programming this, it will be used for specifying
+ whether tabs for gluing and/or sewing a cardboard model should be drawn,
+ too.
+ 
+      <pre class="example">          Icosahedron::draw_net(2, false);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF198.png"
+ alt="[Figure 198. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 198. 
+ <br>
+ </p>
+ 
+         </blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Semi-Regular-Archimedean-Polyhedra"></a>
+ <a name="Semi_002dRegular-Archimedean-Polyhedra"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Regular-Platonic-Polyhedra">Regular Platonic Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Polyhedron-Reference">Polyhedron Reference</a>
+ 
+ </div>
+ 
+ <h3 class="section">37.3 Semi-Regular Archimedean Polyhedra</h3>
+ 
+ <p>Once I've added <code>class Octahedron</code>, the only Platonic polyhedron I
+ haven't programmed yet, I plan to start adding classes
+ for the semi-regular Archimedean polyhedra.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Truncated-Octahedron">Truncated Octahedron</a>
+ </ul>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Truncated-Octahedron"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Semi_002dRegular-Archimedean-Polyhedra">Semi-Regular Archimedean Polyhedra</a>
+ 
+ </div>
+ 
+ <h4 class="subsection">37.3.1 Truncated Octahedron</h4>
+ 
+ <p><a name="index-Trunc_005fOctahedron-878"></a><a name="index-Truncated-Octahedron-879"></a>Class <code>Trunc_Octahedron</code> is defined in <samp><span class="file">polyhed.web</span></samp>. 
+ It is derived from <code>Polyhedron</code> using public derivation.
+ 
+    <p><code>Trunc_Octahedron</code> does not yet have a functioning constructor, so
+ it cannot be used as yet.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>
+ <li><a accesskey="2" href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>
+ <li><a accesskey="3" href="#Truncated-Octahedron-Net">Truncated Octahedron Net</a>
+ </ul>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Truncated-Octahedron-Data-Members"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Truncated-Octahedron">Truncated Octahedron</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Truncated-Octahedron">Truncated Octahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.1 Data Members</h5>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>angle_hex_square</b><var><a name="index-angle_005fhex_005fsquare-880"></a></var><br>
+ <blockquote><p>The angle between the hexagonal and the square faces of the truncated
+ octahedron, namely
+ 125 degrees
+  16'
+ . 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected static <code>const</code> variable: real <b>angle_hex_hex</b><var><a name="index-angle_005fhex_005fhex-881"></a></var><br>
+ <blockquote><p>The angle between the hexagonal faces of the truncated
+ octahedron, namely
+ 109 degrees
+  28'
+ . 
+ <!-- !! TO DO:  Add illustration. -->
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Protected variable: real <b>hexagon_radius</b><var><a name="index-hexagon_005fradius-882"></a></var><br>
+ <blockquote><p>The radius of the circle enclosing a hexagonal or square face of the
+ <code>Trunc_Octahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="node">
+ <a name="Truncated-Octahedron-Constructors-and-Setting-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Truncated-Octahedron-Net">Truncated Octahedron Net</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Truncated-Octahedron">Truncated Octahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.2 Constructors and Setting Functions</h5>
+ 
+ <div class="defun">
+ &mdash; Default constructor: void <b>Trunc_Octahedron</b> (<code>void</code>)<var><a name="index-Trunc_005fOctahedron-883"></a></var><br>
+ <blockquote><p>Creates an empty <code>Trunc_Octahedron</code>. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Constructor: void <b>Trunc_Octahedron</b> (<var>const Point&amp; p, const real diameter_of_hexagon, </var>[<var>real angle_x = 0, </var>[<var>real angle_y = 0, </var>[<var>real angle_z = 0</var>]]])<var><a name="index-Trunc_005fOctahedron-884"></a></var><br>
+ <blockquote><p>This function does not yet exist! 
+ When it does, it will create a <code>Trunc_Octahedron</code> with its center
+ at the origin, where the
+ hexagonal and square faces have enclosing circles of diameter
+ <var>diameter_of_hexagon</var>.  If any of <var>angle_x</var>, <var>angle_y</var>, or
+ <var>angle_z</var> is non-zero, the <code>Trunc_Octahedron</code> will be rotated
+ by the amounts specified around the corresponding axes.  Finally,
+ if <var>p</var> is not the origin, the <code>Trunc_Octahedron</code> will be
+ shifted such that <code>center</code> comes to lie at <var>p</var>. 
+ </p></blockquote></div>
+ 
+ <!-- node-name,  next,  previous,  up -->
+ <div class="node">
+ <a name="Truncated-Octahedron-Net"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Truncated-Octahedron">Truncated Octahedron</a>
+ 
+ </div>
+ 
+ <h5 class="subsubsection">37.3.1.3 Net</h5>
+ 
+ <div class="defun">
+ &mdash; Static function: vector&lt;Reg_Polygon*&gt; <b>get_net</b> (<var>const real hexagon_diameter, </var>[<var>bool do_half = </var><code>false</code>])<var><a name="index-get_005fnet-885"></a></var><br>
+ <blockquote><p>This function does not yet exist! 
+ When it does, it will return the <dfn>net</dfn>, i.e., the two-dimensional
+ pattern of hexagons and squares that can be folded into
+ a model of a truncated octahedron.  The net will lie in the x-z plane. 
+ The hexagons and squares will
+ have enclosing circles of diameter <var>hexagon_diameter</var>. 
+ If the argument <var>do_half</var> is <code>true</code>, only the first half of the
+ net will be created.  This will be used in the non-default constructor. 
+ See <a href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Polyhedron Reference; Regular Platonic Polyhedra; Truncated Octahedron Constructors and Setting Functions</a>. 
+ </p></blockquote></div>
+ 
+ <!-- utility.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Utility-Functions"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Adding-a-File">Adding a File</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Polyhedron-Reference">Polyhedron Reference</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">38 Utility Functions</h2>
+ 
+ <div class="defun">
+ &mdash; Function: double <b>trunc</b> (<var>double d</var>)<var><a name="index-trunc-886"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">pspglb.web</span></samp>. 
+ For some reason, when I compile 3DLDF using GNU CC on a PC Pentium II
+ XEON under Linux 2.4.4 i686, the standard library function
+ <code>trunc()</code> is not available.  Therefore, I've had to write one. 
+ <!-- !! TO DO: -->
+ <a name="index-kludge-887"></a>This is a kludge! 
+ Someday, I'll have to try to find a better solution to this problem. 
+ </p></blockquote></div>
+ 
+ <div class="defun">
+ &mdash; Function: pair&lt;real, real&gt; <b>solve_quadratic</b> (<var>real a, real b, real c</var>)<var><a name="index-solve_005fquadratic-888"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">pspglb.web</span></samp>. 
+ This function tries to find the solutions S_0 and S_1 to the
+ quadratic equation
+ ax^2 + bx + c according to the formulae
+ S_0 == -b + sqrt(b^2 - 4ac) / 2a) and
+ S_1 == -b - sqrt( b^2 - 4ac) / 2a. 
+ Let <code>r</code> stand for the return value.  If S_0 cannot be found,
+ <code>r.first</code> will be <code>INVALID_REAL</code>, otherwise S_0. 
+ If S_1 cannot be found,
+ <code>r.second</code> will be <code>INVALID_REAL</code>, otherwise S_1.
+ 
+      <pre class="display">          (x + 4)(x + 2) = x^2 + 6x + 8 = 0
+ </pre>
+         <pre class="example">          real_pair r = solve_quadratic(1, 6, 8);
+           &rArr; r.first == -2
+           &rArr; r.second == -4
+ </pre>
+         <pre class="example">          real_pair r = solve_quadratic(1, -2, 4);
+           &rArr; r.first == INVALID_REAL
+           &rArr; r.second == INVALID_REAL
+ </pre>
+         </blockquote></div>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Perspective-Functions">Perspective Functions</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Perspective-Functions"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Utility-Functions">Utility Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Utility-Functions">Utility Functions</a>
+ 
+ </div>
+ 
+ <h3 class="section">38.1 Perspective Functions</h3>
+ 
+ <div class="defun">
+ &mdash; Function: void <b>persp_0</b> (<var>const real front_corner_x, const real front_corner_z, const real side_lft, const real side_rt, const real angle_rt, const real f_2_cv, const real gl_2_cv, </var>[<var>const real horizon_lft = 6, </var>[<var>real horizon_rt = 0, </var>[<var>real gl_lft = 0, </var>[<var>real gl_rt = 0</var>]]]])<var><a name="index-persp_005f0-889"></a></var><br>
+ <blockquote><p>Defined in <samp><span class="file">utility.web</span></samp>. 
+ This function is used for the figure in <a href="#The-Perspective-Projection">The Perspective Projection</a>, illustrating a perspective projection as it could be done
+ by hand.  It draws a rectangle in the ground plane and the construction
+ lines used for putting it into perspective.  It also labels the
+ vanishing and measuring points.
+ 
+         <p>The arguments:
+           <dl>
+ <dt><code>const real</code><var> front_corner_x</var><dd>The x-coordinate of the front corner of the rectangle.
+ 
+           <br><dt><code>const real</code><var> front_corner_z</var><dd>The z-coordinate of the front corner of the rectangle.
+ 
+           <br><dt><code>const real</code><var> side_lft</var><dd>The length of the left side of the rectangle.
+ 
+           <br><dt><code>const real</code><var> side_rt</var><dd>The length of the right side of the rectangle.
+ 
+           <br><dt><code>const real</code><var> angle_rt</var><dd>The angle at which the right side of the rectangle recedes to the
+ horizon.
+ 
+           <br><dt><code>const real</code><var> f_2_cv</var><dd>The distance from the focus to the center of vision.
+ 
+           <br><dt><code>const real</code><var> gl_2_cv</var><dd>The distance of the ground line to the center of vision.
+ 
+           <br><dt><code>const real</code><var> horizon_lft</var><dd>Default: 6. 
+ The length of the horizon line leftwards of the center of vision.
+ 
+           <br><dt><code>real</code><var> horizon_rt</var><dd>Default: 0. 
+ The length of the horizon line rightwards of the center of vision.
+ 
+           <br><dt><code>real</code><var> gl_lft</var><dd>Default: 0. 
+ The length of the ground line leftwards of the line from the focus to
+ the center of vision.
+ 
+           <br><dt><code>real</code><var> gl_rt</var><dd>Default: 0. 
+ The length of the ground line rightwards of the line from the focus to
+ the center of vision. 
+ </dl>
+ 
+         <p>Example:
+ 
+      <pre class="example">          persp_0(3, 2, 10, 5, 47.5, 7, 5, 8.5, 9.5, 8.5, 9.5);
+ </pre>
+         <p><p align="center">
+ <br>
+ <img src="./graphics/png/3DLDF199.png"
+ alt="[Figure 199. Not displayed.]" 
+ />
+ <br>
+ <br>
+ Fig. 199. 
+ <br>
+ </p>
+ 
+      </blockquote></div>
+ 
+ <!-- addfile.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Adding-a-File"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Future-Plans">Future Plans</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Utility-Functions">Utility Functions</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">39 Adding a File</h2>
+ 
+ <p>Version 1.1.1 was the first version of 3DLDF since it became a GNU
+ package (the current version is 1.1.5.1).  In previous versions,
+ recompilation was controlled by an
+ auxilliary program, which I wrote in C++
+  using CWEB.  However,
+ in the course of making 3DLDF conformant to the
+ GNU Coding Standards<a rel="footnote" href="#fn-46" name="fnd-46"><sup>46</sup></a>,
+ this has
+ been changed.  Recompilation is now controlled by <samp><span class="command">make</span></samp>, as is
+ customary.  The chapter &ldquo;Compiling&rdquo; in previous editions of this
+ manual, is therefore no longer needed.
+ 
+    <p>Nonetheless, using CWEB still has consequences for the way recompilation
+ must be handled, and it was fairly tricky getting <samp><span class="command">make</span></samp> to work
+ for 3DLDF.  Users who only put code in <samp><span class="file">main.web</span></samp> and/or change
+ code in existing files won't have to worry about this;
+ for others, this chapter explains how to add
+ files to 3DLDF.
+ 
+    <p>Let's say you want to add a file <samp><span class="file">widgets.web</span></samp> that defines a
+ <code>class Widget</code>, and that the latter needs access to
+ <code>class Rectangle</code>, and is in turn required by <code>class Ellipse</code>. 
+ Code must be added to <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile</span></samp> for
+ ctangling <samp><span class="file">widgets.web</span></samp>, compiling <samp><span class="file">widgets.cxx</span></samp>, and linking
+ <samp><span class="file">widgets.o</span></samp> with the other object files to make the executable
+ <samp><span class="file">3dldf</span></samp>.
+ 
+    <p>The best way to do this is to change
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile.am</span></samp> and use Automake
+ to generate a new <samp><span class="file">Makefile.in</span></samp>.  Then, <samp><span class="command">configure</span></samp> can be
+ used to generate a new <samp><span class="file">Makefile</span></samp>.  It would be possible to modify
+ <samp><span class="file">Makefile</span></samp> by hand, but I don't recommend it.  The following
+ assumes that the user has access to Automake.  If he or she is using a
+ GNU/Linux system, this is probably true.<a rel="footnote" href="#fn-47" name="fnd-47"><sup>47</sup></a>
+ 
+    <p>&lsquo;<samp><span class="samp">widgets.web</span></samp>&rsquo; must be added between &lsquo;<samp><span class="samp">rectangs.web</span></samp>&rsquo; and
+ &lsquo;<samp><span class="samp">ellipses.web</span></samp>&rsquo; in the following variable declaration in
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/Makefile.am</span></samp>:
+ 
+ <pre class="example">     3dldf_SOME_CWEBS = pspglb.web io.web colors.web transfor.web \
+                         shapes.web pictures.web points.web \
+                         lines.web planes.web paths.web curves.web \
+                         polygons.web rectangs.web ellipses.web \
+                         circles.web patterns.web solids.web
+                         solfaced.web cuboid.web polyhed.web \
+                         utility.web parser.web examples.web
+ </pre>
+    <p>Now, add &lsquo;<samp><span class="samp">widgets.o</span></samp>&rsquo; between &lsquo;<samp><span class="samp">ellipses.o</span></samp>&rsquo; and
+ &lsquo;<samp><span class="samp">rectangs.o</span></samp>&rsquo; in the following variable declaration:
+ 
+ <pre class="example">     3dldf_OBS_REVERSED = main.o examples.o parser.o utility.o \
+                           polyhed.o cuboid.o  solfaced.o solids.o \
+                           patterns.o circles.o ellipses.o rectangs.o \
+                           polygons.o curves.o paths.o \
+                           planes.o lines.o points.o pictures.o shapes.o
+                           transfor.o colors.o io.o pspglb.o
+ </pre>
+    <p><code>3dldf_OBS_REVERSED</code> is needed, because 3DLDF fails with
+ a &ldquo;Segmentation fault&rdquo;, if
+ the executable is linked using <code>$(3dldf_OBJECTS)</code>.  This may cause
+ problems, if <samp><span class="file">3dldf</span></samp> isn't built using the GNU C++
+  compiler
+ (GCC).
+ 
+    <p>Now add a target for <samp><span class="file">widgets.o</span></samp> between the targets for
+ <samp><span class="file">rectangs.o</span></samp> and <samp><span class="file">ellipses.o</span></samp>, and add <samp><span class="file">widgets.tim</span></samp>
+ after <samp><span class="file">rectangs.tim</span></samp> in the list of prerequisites for
+ <samp><span class="file">ellipses.o</span></samp>:
+ 
+ <pre class="example">     rectangs.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.cxx
+      
+      ellipses.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim ellipses.cxx
+ </pre>
+    <p>This is the result:
+ <pre class="example">     rectangs.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.cxx
+      
+      widgets.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim \
+               widgets.cxx
+      
+      ellipses.o: loader.tim pspglb.tim io.tim colors.tim transfor.tim \
+               shapes.tim pictures.tim points.tim lines.tim planes.tim \
+               paths.tim curves.tim polygons.tim rectangs.tim widgets.tim \
+               ellipses.cxx
+ </pre>
+    <p>In addition, <samp><span class="file">widgets.tim</span></samp>
+ must be added to the list of prerequisites in all of the following
+ targets up to and including <samp><span class="file">examples.o</span></samp>.
+ 
+ <!-- This is ~/metafont/metapost/perspective/DOCUMENTATION/future.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Future-Plans"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Changes">Changes</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Adding-a-File">Adding a File</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">40 Future Plans</h2>
+ 
+ <p>3DLDF is a work-in-progress.  In fact, it can never be
+ finished, because the supply of interesting geometric constructions
+ is inexhaustible.  However, presently 3DLDF still has a number of major
+ gaps.
+ 
+    <p>If you're interesting in contributing to 3DLDF, with respect to one of
+ the topics below and in the following sections, or if you have ideas
+ of your own, see <a href="#Contributing-to-3DLDF">Contributing to 3DLDF</a>.
+ 
+      <ul>
+ <li>Input routine. 
+ The lack of one is the most significant
+ defect in 3DLDF, as mentioned in <a href="#No-Input-Routine">No Input Routine</a>.
+ 
+      <li>Port to other platforms. 
+ See <a href="#Ports">Ports</a>. 
+ </ul>
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Geometry">Geometry</a>
+ <li><a accesskey="2" href="#Curves-and-Surfaces">Curves and Surfaces</a>
+ <li><a accesskey="3" href="#Shadows">Shadows</a>
+ <li><a accesskey="4" href="#Multi_002dThreading">Multi-Threading</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Geometry"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Curves-and-Surfaces">Curves and Surfaces</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Future-Plans">Future Plans</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Future-Plans">Future Plans</a>
+ 
+ </div>
+ 
+ <h3 class="section">40.1 Geometry</h3>
+ 
+ <p>3DLDF currently provides a set of basic plane and solid geometrical
+ figures.  However, some important ones are still missing. 
+ There are many useful geometrical data types and functions whose
+ implementation would require no more than elementary geometry.
+ 
+      <ul>
+ <li>Add constructors with a normal vector argument rather than angles of
+ rotation about the main axes.
+ 
+      <li>I have started defining <code>class Triangle</code>, which can be used for
+ calculating triangle solutions.
+ 
+      <li><a name="index-multiple-inheritance-890"></a><a name="index-derived-classes-891"></a><a name="index-derivation-892"></a>Add a class <code>Conic_Section</code> and derive <code>Ellipse</code>
+ from it.  This will be the first case of
+ <dfn>multiple inheritance</dfn><a rel="footnote" href="#fn-48" name="fnd-48"><sup>48</sup></a>
+ in 3DLDF, since <code>Ellipse</code> is already
+ derived from <code>Path</code>.  See <a href="#Ellipse-Reference">Ellipse Reference</a>. 
+ Add the classes <code>Parabola</code> and <code>Hyperbola</code>.
+ 
+      <li>Add more functions for finding the intersections of objects of various
+ types, starting with the plane figures. 
+ In particular, I believe I've found an algebraic solution for
+ the intersection of an <code>Ellipse</code> and a <code>Circle</code> in a plane,
+ but I haven't had a chance to try implementing it yet.
+ 
+      <p>If this works, I think it will make it possible to find the intersection
+ of two coplanar ellipses algebraically, because it will be possible to
+ transform them both such that one of them becomes circular.
+ 
+      <li>Class <code>Octahedron</code> will complete the set of regular Platonic
+ polyhedra.
+ 
+      <li>Add classes for the Kepler-Poinsot polyhedra, the semi-regular
+ Archimedean polyhedra,  the dual solids, the stellated Archimedean
+ polyhedra, and the regular compounds.<a rel="footnote" href="#fn-49" name="fnd-49"><sup>49</sup></a>
+ 
+      <li>Add class <code>Ellipsoid</code> and a derived class <code>Sphere</code>.
+ 
+      <li>Improve the specification of <code>Solid</code> and
+ <code>Solid_Faced</code>. 
+ In particular, it would help to store the vertices of
+ <code>Polyhedra</code> as individual <code>Points</code>, rather
+ than using <code>Reg_Polygons</code>.  I'd also
+ like to find a better way of generating <code>Solids</code>, without using
+ rotations, if possible.
+ 
+    </ul>
+ 
+ <div class="node">
+ <a name="Curves-and-Surfaces"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Shadows">Shadows</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Geometry">Geometry</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Future-Plans">Future Plans</a>
+ 
+ </div>
+ 
+ <h3 class="section">40.2 Curves and Surfaces</h3>
+ 
+ <p><a name="index-splines-893"></a><a name="index-spline-curves-894"></a><a name="index-B_0040_0027ezier-curves-895"></a><a name="index-B_002dsplines-896"></a><a name="index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-897"></a><a name="index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-898"></a><a name="index-patches-899"></a><a name="index-surface-patches-900"></a>3D modelling software usually supports the creation and manipulation of
+ various kinds of <dfn>spline curves</dfn>: <dfn>B&eacute;zier curves</dfn>,
+ <dfn>B-splines</dfn>, and <dfn>non-uniform rational B-splines</dfn> or
+ <dfn>NURBS</dfn>.  These curves can be used for generating surfaces.<a rel="footnote" href="#fn-50" name="fnd-50"><sup>50</sup></a>
+ 
+    <p><a name="index-projective-invariance-901"></a><a name="index-invariance_002c-projective-902"></a><code>paths</code> in Metafont and MetaPost are B&eacute;zier curves. 
+ It would be possible to implement three-dimensional B&eacute;zier curves in
+ 3DLDF, but unfortunately they are not <dfn>projectively invariant</dfn>:
+ 
+    <p>Let c_0 represent a B&eacute;zier curve in three dimensions,
+ P the control points of c_0, and
+ t a projection transformation. 
+ Further, let Q represent the points generated from applying
+ t to P, and c_1 the curve generated from Q. 
+ Finally, let R represent the points generated from applying
+ t to all of the points on c_0, and
+  c_2 the curve through R:
+ c_1 \not\equiv c_2.
+ 
+    <p><a name="index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-903"></a><a name="index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-904"></a><a name="index-projective-invariance-905"></a><a name="index-invariance_002c-projective-906"></a>NURBS, on the other hand, are projectively invariant,<a rel="footnote" href="#fn-51" name="fnd-51"><sup>51</sup></a>
+ so I will probably
+ concentrate on implementing them.  On the other hand, it would be nice
+ to be able to implement Metafont's way of specifying <code>paths</code>
+ using `<code>curl</code>', `<code>tension</code>', and `<code>dir</code>' in 3DLDF. 
+ This may prove to be difficult or impossible.  I do not yet know
+ whether Metafont's <code>path</code> creation algorithm can be generalized to
+ three dimensions.<a rel="footnote" href="#fn-52" name="fnd-52"><sup>52</sup></a>
+ 
+    <p>Curves and surfaces are advanced topics, so it may be a while
+ before I implement them in 3DLDF.
+ 
+ <div class="node">
+ <a name="Shadows"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Multi_002dThreading">Multi-Threading</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Curves-and-Surfaces">Curves and Surfaces</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Future-Plans">Future Plans</a>
+ 
+ </div>
+ 
+ <h3 class="section">40.3 Shadows, Reflections, and Rendering</h3>
+ 
+ <p><a name="index-shadows-907"></a><a name="index-reflections-908"></a>Shadows and reflections are closely related to transformations and
+ projections. 
+ A shadow is the projection of the outline of an object onto a surface or
+ surfaces, and reflection in a plane is an affine transformation.
+ 
+    <p><a name="index-shading-909"></a>3D rendering software generally implements shadows, or more generally,
+ <dfn>shading</dfn>, reflections, and certain other effects using methods
+ involving the calculation of individual pixel values. 
+ Surface hiding is also often implemented at the pixel level. 
+ 3DLDF does no scan converting ((see <a href="#Accuracy">Accuracy</a>), and hence
+ no calculation of pixel values at all, so these methods cannot be
+ used in 3DLDF at present.
+ 
+    <p>However, it is possible to define functions for generating
+ shadows and reflections within 3DLDF by other means.
+ 
+    <p>I have defined the function <code>Point::reflect()</code> for reflecting a
+ <code>Point</code> in a <code>Plane</code>, and have begun definining versions for
+ other classes.
+ 
+    <p>However, in order for reflections to work, I must define functions for
+ breaking up objects into smaller units.  This is also necessary for
+ surface hiding to work properly.
+ 
+    <p>For MetaPost output, I will have to implement shadows, reflections, and
+ surface hiding in this way.  However, 3DLDF could be made to produce
+ output in other formats.  There are two possibilities:  implementing
+ rendering functionality within 3DLDF, or interfacing to
+ existing rendering software.  If I decide to do the latter, there are
+ again two possibilities:  having 3DLDF write output in a format that a
+ renderer can input, or linking to a library supplied by a rendering
+ package.
+ 
+    <p>I haven't yet decided which course to pursue.  However, in the long run,
+ I'd like it to be possible to use 3DLDF for fancier graphics than is
+ currently possible using MetaPost and PostScript alone.
+ 
+ <div class="node">
+ <a name="Multi-Threading"></a>
+ <a name="Multi_002dThreading"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Shadows">Shadows</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Future-Plans">Future Plans</a>
+ 
+ </div>
+ 
+ <h3 class="section">40.4 Multi-Threading</h3>
+ 
+ <p><a name="index-multi_002dthreading-910"></a>When 3DLDF is run, there is only one thread of execution. 
+ However, it could benefit from the use of multiple threads. 
+ In particular, it may be faster and more efficient to have
+ <code>Picture::output()</code> run in its own thread. 
+ In this case, it will no longer be possible to share
+ <code>current_picture</code> among figures.
+ 
+    <p>It may also be
+ worthwhile to execute the code for &ldquo;figures&rdquo;, i.e., the code
+ between &lsquo;<samp><span class="samp">beginfig()</span></samp>&rsquo; and &lsquo;<samp><span class="samp">endfig()</span></samp>&rsquo;, inclusive,
+ in their own threads.  This will require some changes in the way data
+ are handled.  For example, if non-constant objects are shared
+ among figures, there may be no advantage to multi-threading because of
+ the need to coordinate the access of the threads to the objects. 
+ If threads are used, then non-constant objects should be
+ declared locally within the figure.  They may be locally declared
+ copies of global objects.  Alternatively,  <code>beginfig()</code> could be
+ changed so that objects could be passed to it as  arguments, perhaps as
+ a <code>vector&lt;void*&gt;</code> and/or a <code>vector&lt;Shape*&gt;</code>.
+ 
+ <!-- Local Variables: -->
+ <!-- eval:(outline-minor-mode) -->
+ <!-- eval:(read-abbrev-file) -->
+ <!-- run-texi2dvi-on-file:"3DLDF.texi" -->
+ <!-- run-dvips-on-file:"3DLDF.dvi" -->
+ <!-- End: -->
+ <!-- changes.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Changes"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Bibliography">Bibliography</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Future-Plans">Future Plans</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="chapter">41 Changes</h2>
+ 
+ <p class="noindent">Updated 16 January 2004.
+ 
+ <ul class="menu">
+ <li><a accesskey="1" href="#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>
+ <li><a accesskey="2" href="#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>
+ <li><a accesskey="3" href="#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>
+ <li><a accesskey="4" href="#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>
+ <li><a accesskey="5" href="#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>
+ <li><a accesskey="6" href="#Initial-version">Initial version</a>
+ </ul>
+ 
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.5.1"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e5_002e1"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes">Changes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.1 3DLDF 1.1.5.1</h3>
+ 
+      <ul>
+ <li>Added missing Texinfo files to the <code>3dldf_TEXINFOS</code> variable in
+ <samp><span class="file">3DLDF-1.1.5.1/DOC/TEXINFO/Makefile.am</span></samp>, and reordered the
+ filenames.
+ 
+      <li><a name="index-PNG-_0028Portable-Network-Graphics_0029-911"></a><a name="index-Portable-Network-Graphics-_0028PNG_0029-912"></a>Changed the names of the PNG (Portable Network Graphics) files
+ included in the HTML version of this manual. 
+ Changed the names in the commands for including these
+ files in the Texinfo files.  I wasn't able to write some of the
+ files with the old names to a CD-R (Compact Disk, Recordable). 
+ </ul>
+ 
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.5"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e5"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.2 3DLDF 1.1.5</h3>
+ 
+ <p>In release 1.1.5, I've tied up some loose ends.  I wanted to do this
+ before starting on the input routine.
+ 
+      <ul>
+ <li>Added <code>const real</code> <var>step</var> argument to the version of
+ <code>Ellipse::intersection_points()</code> that takes an <code>Ellipse</code>
+ argument. 
+ See <a href="#Ellipse-Intersections">Ellipse Reference; Intersections</a>.
+ 
+      <li>It is now possible to &ldquo;typedef&rdquo; <code>real</code> to either <code>float</code>
+ or <code>double</code>.  This means that <code>real</code> can now be made a synonym
+ for either <code>float</code> or <code>double</code> by using a <code>typedef</code>
+ declaration.  <code>real</code> is typedeffed to <code>float</code> by default.
+ 
+      <li>Added <code>const bool ldf_real_float</code> and
+ <code>extern const bool ldf_real_double</code>
+ for use in non-conditionally compiled code. 
+ They are set according to the values
+ of <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.
+ 
+      <li><code>Transform::epsilon()</code> and <code>Point::epsilon()</code> now return
+ different values, depending on the values of the preprocessor macros
+ <code>LDF_REAL_FLOAT</code> and <code>LDF_REAL_DOUBLE</code>.  I have not yet tested
+ whether good values are returned when <code>real</code> is <code>double</code>.
+ 
+      <li><code>MAX_REAL</code> and <code>MAX_REAL_SQRT</code> are no longer constants. 
+ Their values are set at the beginning of <code>main()</code>.  However,
+ users should not change their values.  <code>MAX_REAL</code> is the
+ second-largest <code>float</code> or <code>double</code> on a given machine.  This
+ now works for all common architectures.
+ 
+      <li>Added <code>namespace System</code> containing the following functions:
+ <code>get_endianness()</code>, <code>is_big_endian()</code>,
+ <code>is_little_endian()</code>, <code>get_register_width()</code>,
+ <code>is_32_bit()</code>, <code>is_64_bit()</code>, and the template function
+ <code>get_second_largest()</code>.
+ 
+      <p><code>namespace System</code> and its functions are documented in
+ <samp><span class="file">system.texi</span></samp>, which is new in edition 1.1.5.1.
+ 
+      <li>Replaced the various <code>create_new_</code>&lt;<i>type</i>&gt;<code>()</code> functions with the
+ template function <code>create_new()</code>.  The latter is documented in
+ <samp><span class="file">creatnew.texi</span></samp>, which is new in edition 1.1.5.1.
+ 
+      <li>Added the file <samp><span class="file">3DLDF-1.1.5.1/CWEB/cnepspng.el</span></samp> to
+ the distribution.  It contains the definitions of the Emacs-Lisp
+ functions <samp><span class="command">convert-eps</span></samp> and <samp><span class="command">convert-eps-loop</span></samp>. 
+ See <a href="#Converting-EPS-Files-ELISP">Running 3DLDF; Converting EPS Files; Emacs-Lisp Functions</a>.
+ 
+      <li>Added the files
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/exampman.web</span></samp> and<br>
+ <samp><span class="file">3DLDF-1.1.5.1/CWEB/examples.mp</span></samp> to the
+ distribution.  They contain the C++
+  and MetaPost code,
+ respectively, for generating the illustrations in this manual.
+ 
+    </ul>
+ 
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4.2"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4_002e2"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes-in-3DLDF-1_002e1_002e5">Changes in 3DLDF 1.1.5</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.3 3DLDF 1.1.4.2</h3>
+ 
+      <ul>
+ <li>The illustrations in the HTML output are now scaled to
+ <code>magstep3</code>. 
+ </ul>
+ 
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4.1"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4_002e1"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes-in-3DLDF-1_002e1_002e4_002e2">Changes in 3DLDF 1.1.4.2</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.4 3DLDF 1.1.4.1</h3>
+ 
+      <ul>
+ <li>The HTML output now includes illustrations. 
+ </ul>
+ 
+ <div class="node">
+ <a name="Changes-in-3DLDF-1.1.4"></a>
+ <a name="Changes-in-3DLDF-1_002e1_002e4"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Initial-version">Initial version</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes-in-3DLDF-1_002e1_002e4_002e1">Changes in 3DLDF 1.1.4.1</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.5 3DLDF 1.1.4</h3>
+ 
+      <ul>
+ <li><code>MAX_REAL</code> is now the second largest float value.  However, the
+ calculation is system dependent, and will only work on 32-bit
+ little-endian architectures.  I will start working on porting this
+ soon.
+ 
+      <li>Fixed bug in <samp><span class="file">tsthdweb</span></samp>, that caused files to be compiled more
+ often than necessary.  It will be necessary to keep an eye on this.
+ 
+      <li>Added <code>Rectangle::is_rectangular()</code>.
+ 
+      <li>Made <code>mediate()</code> a member function of <code>Point</code>.
+ 
+      <li>It is now possible to generate this manual in the Info and HTML
+ formats. 
+ </ul>
+ 
+ <div class="node">
+ <a name="Initial-version"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes-in-3DLDF-1_002e1_002e4">Changes in 3DLDF 1.1.4</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Changes">Changes</a>
+ 
+ </div>
+ 
+ <h3 class="section">41.6 3DLDF 1.1.1</h3>
+ 
+ <p>3DLDF 1.1.1 was the first version of 3DLDF since it became a GNU
+ package (the current version is 1.1.5.1).  It is now conformant
+ to the GNU Coding Standards, except that
+ a functioning <samp><span class="file">3DLDF.info</span></samp> cannot be generated from
+ <samp><span class="file">3DLDF.texi</span></samp>.   The
+ distribution now includes a <code>configure</code> script,
+ <samp><span class="file">Makefile.in</span></samp> files, and other files generated by Autoconf and
+ Automake.  Recompilation is now handled by <samp><span class="command">make</span></samp> rather than
+ the auxilliary program <samp><span class="command">3DLDFcpl</span></samp>.  The files
+ <samp><span class="file">3DLDFcpl.web</span></samp> and <samp><span class="file">3DLDFprc.web</span></samp> have been removed from the
+ distribution.
+ 
+    <p>The extension of the C++
+  files generated by <samp><span class="command">ctangle</span></samp> is
+ changed from <samp><span class="file">c</span></samp> to <samp><span class="file">cxx</span></samp> before they are compiled. 
+ After <samp><span class="command">ctangle</span></samp> is run on a CWEB file, <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp>
+ is compared to the old <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.cxx</span></samp> using <samp><span class="command">diff</span></samp>. 
+ Whitespace, comments, and <code>#line</code> preprocessor commands are
+ ignored.  The <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp> is only renamed to
+ <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.cxx</span></samp> and compiled if they differ.  This way,
+ changes to the TeX text only in a CWEB file no longer cause
+ recompilation and relinking.
+ 
+    <p>The main Texinfo file is now called <samp><span class="file">3DLDF.texi</span></samp>.  It was formerly
+ called <samp><span class="file">3DLDFman.texi</span></samp>.  This is because Automake expects this
+ name.  For this reason, the CWEB
+ file passed as an argument to cweave has been renamed
+ <samp><span class="file">3DLDFprg.web</span></samp>.  It was formerly called <samp><span class="file">3DLDF.web</span></samp>.
+ 
+ <!-- biblio.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Bibliography"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#GNU-Free-Documentation-License">GNU Free Documentation License</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Changes">Changes</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="unnumbered">Bibliography</h2>
+ 
+ <!-- I'm not happy with the formatting of the bibliography entries, but I -->
+ <!-- wasn't able to fix it.  I tried various solutions involving \hangafter -->
+ <!-- and \hangindent and macros, but none of them worked.  LDF 2003.12.07. -->
+ <!-- Nor was I able to prevent the displayed comment about Vredemann de Vries -->
+ <!-- from being split from the entry.  !! I think fixing these problems -->
+ <!-- will involve  fixing texinfo.tex.  LDF 2003.12.07. -->
+ <p>Cundy, H. Martyn and A.P. Rollet. 
+ <i>Mathematical Models</i>. 
+ Oxford 1961. 
+ Oxford University Press.
+ 
+ <pre class="display">     Unfortunately out of print.
+ </pre>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Finston, Laurence D. 
+ <i>3DLDF:  The Program</i>. 
+ G&ouml;ttingen 2003.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Fischer, Gerd. 
+ <i>Ebene algebraische Kurven</i>. 
+ Vieweg Studium.  Aufbaukurs Mathematik. 
+ Friedr.&nbsp;<!-- /@w -->Vieweg &amp; Sohn Verlagsgesellschaft mbH. 
+ Braunschweig/Wiesbaden 1994.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Gill, Robert W. 
+ <i>Creative Perspective</i>. 
+ London 1975. 
+ Thames and Hudson Ltd. 
+ ISBN&nbsp;0-500-27056-2.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Harbison, Samuel P., and Guy L. Steele Jr. 
+ <i>C, A Reference Manual</i>. 
+ Prentice Hall. 
+ Englewood Cliffs, New Jersey 1995. 
+ ISBN&nbsp;0-13-326232-4&nbsp;{Case}.<!-- /@w -->
+ ISBN~0-13-326224-3&nbsp;{Paperback}.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>Smooth, Easy to Compute Interpolating Splines</i>. 
+ Discrete and Computational Geometery 1(2). 
+ Springer-Verlag. 
+ New York 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Hobby, John D. 
+ <i>A User's Manual for MetaPost</i>. 
+ AT &amp; T Bell Laboratories. 
+ Murray Hill, NJ. No date.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Jones, Huw. 
+ <i>Computer Graphics through Key Mathematics</i>. 
+ Springer-Verlag London Limited 2001. 
+ ISBN&nbsp;1-85233-422-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>Metafont:  The Program</i>. Computers and Typesetting; D. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986. 
+ ISBN&nbsp;0-201-13438-1.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>. 
+ Computers and Typesetting; C. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald Ervin. 
+ <i>TeX: The Program</i>. Computers and Typesetting; B. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986. 
+ ISBN&nbsp;0-201-13437-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. <i>The TeXbook</i>. 
+ Computers and Typesetting; A. 
+ Addison Wesley Publishing Company, Inc. 
+ Reading, Massachusetts 1986.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Knuth, Donald E. and Silvio Levy. 
+ <i>The </i><b>CWEB</b><i> System of Structured Documentation</i>. 
+ Version&nbsp;3.64&mdash;February&nbsp;2002.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Rokicki, Tomas. 
+ <i>Dvips: A DVI-to-PostScript Translator</i>
+ for version 5.66a. 
+ February 1997. 
+ <a href="http://dante.ctan.org/CTAN/dviware/dvips/">http://dante.ctan.org/CTAN/dviware/dvips/</a>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Salomon, David. 
+ <i>Computer Graphics and Geometric Modeling</i>. 
+ Berlin 1999. 
+ Springer-Verlag. 
+ ISBN:&nbsp;0-387-98682-0.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stallman, Richard M. and Roland McGrath. 
+ <i>GNU Make.  A Program for Directing Recompilation. 
+ </i><b>make</b><i> Version 3.79</i>. 
+ Boston 2000. 
+ Free Software Foundation, Inc. 
+ ISBN:&nbsp;1-882114-80-9.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stallman, Richard M. 
+ <i>Using and Porting the GNU Compiler Collection</i>. 
+ For GCC Version 3.3.2. 
+ Boston 2003. 
+ Free Software Foundation, Inc.
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The C++
+  Programming Language</i>. 
+ Special Edition. 
+ Reading, Massachusetts 2000. 
+ Addison-Wesley. 
+ ISBN&nbsp;0-201-70073-5.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Stroustrup, Bjarne. 
+ <i>The Design and Evolution of C++
+ </i>. 
+ Reading, Massachusetts 1994. 
+ Addison-Wesley Publishing Company. 
+ ISBN&nbsp;0-201-54330-3.<!-- /@w -->
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">Vredeman de Vries, Jan. 
+ <i>Perspective</i>. 
+ New York 1968. 
+ Dover Publications, Inc. 
+ Standard&nbsp;Book&nbsp;Number:&nbsp;486-21086-4.<!-- /@w -->
+ 
+ <pre class="display">     The beautiful perspective constructions in this volume are taken from
+      the original work, first published by Henricus Hondius in Leiden in 1604
+      and 1605.
+ </pre>
+    <pre class="sp">
+ 
+ </pre>
+ 
+ <p class="noindent">White, Gwen. 
+ <i>Perspective.  A Guide for Artists, Architects and Designers</i>. 
+ London 1968 and 1982. 
+ B T Batsford Ltd. 
+ ISBN&nbsp;0-7134-3412-0.<!-- /@w -->
+ 
+ <div class="node">
+ <a name="GNU-Free-Documentation-License"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Data-Type-and-Variable-Index">Data Type and Variable Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Bibliography">Bibliography</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="appendix">Appendix A GNU Free Documentation License</h2>
+ 
+ <!-- The GNU Free Documentation License. -->
+ <div align="center">Version 1.3, 3 November 2008</div>
+ 
+ <!-- This file is intended to be included within another document, -->
+ <!-- hence no sectioning command or @node. -->
+ <pre class="display">     Copyright &copy; 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+      <a href="http://fsf.org/">http://fsf.org/</a>
+      
+      Everyone is permitted to copy and distribute verbatim copies
+      of this license document, but changing it is not allowed.
+ </pre>
+      <ol type=1 start=0>
+ <li>PREAMBLE
+ 
+      <p>The purpose of this License is to make a manual, textbook, or other
+ functional and useful document <dfn>free</dfn> in the sense of freedom: to
+ assure everyone the effective freedom to copy and redistribute it,
+ with or without modifying it, either commercially or noncommercially. 
+ Secondarily, this License preserves for the author and publisher a way
+ to get credit for their work, while not being considered responsible
+ for modifications made by others.
+ 
+      <p>This License is a kind of &ldquo;copyleft&rdquo;, which means that derivative
+ works of the document must themselves be free in the same sense.  It
+ complements the GNU General Public License, which is a copyleft
+ license designed for free software.
+ 
+      <p>We have designed this License in order to use it for manuals for free
+ software, because free software needs free documentation: a free
+ program should come with manuals providing the same freedoms that the
+ software does.  But this License is not limited to software manuals;
+ it can be used for any textual work, regardless of subject matter or
+ whether it is published as a printed book.  We recommend this License
+ principally for works whose purpose is instruction or reference.
+ 
+      <li>APPLICABILITY AND DEFINITIONS
+ 
+      <p>This License applies to any manual or other work, in any medium, that
+ contains a notice placed by the copyright holder saying it can be
+ distributed under the terms of this License.  Such a notice grants a
+ world-wide, royalty-free license, unlimited in duration, to use that
+ work under the conditions stated herein.  The &ldquo;Document&rdquo;, below,
+ refers to any such manual or work.  Any member of the public is a
+ licensee, and is addressed as &ldquo;you&rdquo;.  You accept the license if you
+ copy, modify or distribute the work in a way requiring permission
+ under copyright law.
+ 
+      <p>A &ldquo;Modified Version&rdquo; of the Document means any work containing the
+ Document or a portion of it, either copied verbatim, or with
+ modifications and/or translated into another language.
+ 
+      <p>A &ldquo;Secondary Section&rdquo; is a named appendix or a front-matter section
+ of the Document that deals exclusively with the relationship of the
+ publishers or authors of the Document to the Document's overall
+ subject (or to related matters) and contains nothing that could fall
+ directly within that overall subject.  (Thus, if the Document is in
+ part a textbook of mathematics, a Secondary Section may not explain
+ any mathematics.)  The relationship could be a matter of historical
+ connection with the subject or with related matters, or of legal,
+ commercial, philosophical, ethical or political position regarding
+ them.
+ 
+      <p>The &ldquo;Invariant Sections&rdquo; are certain Secondary Sections whose titles
+ are designated, as being those of Invariant Sections, in the notice
+ that says that the Document is released under this License.  If a
+ section does not fit the above definition of Secondary then it is not
+ allowed to be designated as Invariant.  The Document may contain zero
+ Invariant Sections.  If the Document does not identify any Invariant
+ Sections then there are none.
+ 
+      <p>The &ldquo;Cover Texts&rdquo; are certain short passages of text that are listed,
+ as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+ the Document is released under this License.  A Front-Cover Text may
+ be at most 5 words, and a Back-Cover Text may be at most 25 words.
+ 
+      <p>A &ldquo;Transparent&rdquo; copy of the Document means a machine-readable copy,
+ represented in a format whose specification is available to the
+ general public, that is suitable for revising the document
+ straightforwardly with generic text editors or (for images composed of
+ pixels) generic paint programs or (for drawings) some widely available
+ drawing editor, and that is suitable for input to text formatters or
+ for automatic translation to a variety of formats suitable for input
+ to text formatters.  A copy made in an otherwise Transparent file
+ format whose markup, or absence of markup, has been arranged to thwart
+ or discourage subsequent modification by readers is not Transparent. 
+ An image format is not Transparent if used for any substantial amount
+ of text.  A copy that is not &ldquo;Transparent&rdquo; is called &ldquo;Opaque&rdquo;.
+ 
+      <p>Examples of suitable formats for Transparent copies include plain
+ <span class="sc">ascii</span> without markup, Texinfo input format, LaTeX input
+ format, <acronym>SGML</acronym> or <acronym>XML</acronym> using a publicly available
+ <acronym>DTD</acronym>, and standard-conforming simple <acronym>HTML</acronym>,
+ PostScript or <acronym>PDF</acronym> designed for human modification.  Examples
+ of transparent image formats include <acronym>PNG</acronym>, <acronym>XCF</acronym> and
+ <acronym>JPG</acronym>.  Opaque formats include proprietary formats that can be
+ read and edited only by proprietary word processors, <acronym>SGML</acronym> or
+ <acronym>XML</acronym> for which the <acronym>DTD</acronym> and/or processing tools are
+ not generally available, and the machine-generated <acronym>HTML</acronym>,
+ PostScript or <acronym>PDF</acronym> produced by some word processors for
+ output purposes only.
+ 
+      <p>The &ldquo;Title Page&rdquo; means, for a printed book, the title page itself,
+ plus such following pages as are needed to hold, legibly, the material
+ this License requires to appear in the title page.  For works in
+ formats which do not have any title page as such, &ldquo;Title Page&rdquo; means
+ the text near the most prominent appearance of the work's title,
+ preceding the beginning of the body of the text.
+ 
+      <p>The &ldquo;publisher&rdquo; means any person or entity that distributes copies
+ of the Document to the public.
+ 
+      <p>A section &ldquo;Entitled XYZ&rdquo; means a named subunit of the Document whose
+ title either is precisely XYZ or contains XYZ in parentheses following
+ text that translates XYZ in another language.  (Here XYZ stands for a
+ specific section name mentioned below, such as &ldquo;Acknowledgements&rdquo;,
+ &ldquo;Dedications&rdquo;, &ldquo;Endorsements&rdquo;, or &ldquo;History&rdquo;.)  To &ldquo;Preserve the Title&rdquo;
+ of such a section when you modify the Document means that it remains a
+ section &ldquo;Entitled XYZ&rdquo; according to this definition.
+ 
+      <p>The Document may include Warranty Disclaimers next to the notice which
+ states that this License applies to the Document.  These Warranty
+ Disclaimers are considered to be included by reference in this
+ License, but only as regards disclaiming warranties: any other
+ implication that these Warranty Disclaimers may have is void and has
+ no effect on the meaning of this License.
+ 
+      <li>VERBATIM COPYING
+ 
+      <p>You may copy and distribute the Document in any medium, either
+ commercially or noncommercially, provided that this License, the
+ copyright notices, and the license notice saying this License applies
+ to the Document are reproduced in all copies, and that you add no other
+ conditions whatsoever to those of this License.  You may not use
+ technical measures to obstruct or control the reading or further
+ copying of the copies you make or distribute.  However, you may accept
+ compensation in exchange for copies.  If you distribute a large enough
+ number of copies you must also follow the conditions in section 3.
+ 
+      <p>You may also lend copies, under the same conditions stated above, and
+ you may publicly display copies.
+ 
+      <li>COPYING IN QUANTITY
+ 
+      <p>If you publish printed copies (or copies in media that commonly have
+ printed covers) of the Document, numbering more than 100, and the
+ Document's license notice requires Cover Texts, you must enclose the
+ copies in covers that carry, clearly and legibly, all these Cover
+ Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+ the back cover.  Both covers must also clearly and legibly identify
+ you as the publisher of these copies.  The front cover must present
+ the full title with all words of the title equally prominent and
+ visible.  You may add other material on the covers in addition. 
+ Copying with changes limited to the covers, as long as they preserve
+ the title of the Document and satisfy these conditions, can be treated
+ as verbatim copying in other respects.
+ 
+      <p>If the required texts for either cover are too voluminous to fit
+ legibly, you should put the first ones listed (as many as fit
+ reasonably) on the actual cover, and continue the rest onto adjacent
+ pages.
+ 
+      <p>If you publish or distribute Opaque copies of the Document numbering
+ more than 100, you must either include a machine-readable Transparent
+ copy along with each Opaque copy, or state in or with each Opaque copy
+ a computer-network location from which the general network-using
+ public has access to download using public-standard network protocols
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+ If you use the latter option, you must take reasonably prudent steps,
+ when you begin distribution of Opaque copies in quantity, to ensure
+ that this Transparent copy will remain thus accessible at the stated
+ location until at least one year after the last time you distribute an
+ Opaque copy (directly or through your agents or retailers) of that
+ edition to the public.
+ 
+      <p>It is requested, but not required, that you contact the authors of the
+ Document well before redistributing any large number of copies, to give
+ them a chance to provide you with an updated version of the Document.
+ 
+      <li>MODIFICATIONS
+ 
+      <p>You may copy and distribute a Modified Version of the Document under
+ the conditions of sections 2 and 3 above, provided that you release
+ the Modified Version under precisely this License, with the Modified
+ Version filling the role of the Document, thus licensing distribution
+ and modification of the Modified Version to whoever possesses a copy
+ of it.  In addition, you must do these things in the Modified Version:
+ 
+           <ol type=A start=1>
+ <li>Use in the Title Page (and on the covers, if any) a title distinct
+ from that of the Document, and from those of previous versions
+ (which should, if there were any, be listed in the History section
+ of the Document).  You may use the same title as a previous version
+ if the original publisher of that version gives permission.
+ 
+           <li>List on the Title Page, as authors, one or more persons or entities
+ responsible for authorship of the modifications in the Modified
+ Version, together with at least five of the principal authors of the
+ Document (all of its principal authors, if it has fewer than five),
+ unless they release you from this requirement.
+ 
+           <li>State on the Title page the name of the publisher of the
+ Modified Version, as the publisher.
+ 
+           <li>Preserve all the copyright notices of the Document.
+ 
+           <li>Add an appropriate copyright notice for your modifications
+ adjacent to the other copyright notices.
+ 
+           <li>Include, immediately after the copyright notices, a license notice
+ giving the public permission to use the Modified Version under the
+ terms of this License, in the form shown in the Addendum below.
+ 
+           <li>Preserve in that license notice the full lists of Invariant Sections
+ and required Cover Texts given in the Document's license notice.
+ 
+           <li>Include an unaltered copy of this License.
+ 
+           <li>Preserve the section Entitled &ldquo;History&rdquo;, Preserve its Title, and add
+ to it an item stating at least the title, year, new authors, and
+ publisher of the Modified Version as given on the Title Page.  If
+ there is no section Entitled &ldquo;History&rdquo; in the Document, create one
+ stating the title, year, authors, and publisher of the Document as
+ given on its Title Page, then add an item describing the Modified
+ Version as stated in the previous sentence.
+ 
+           <li>Preserve the network location, if any, given in the Document for
+ public access to a Transparent copy of the Document, and likewise
+ the network locations given in the Document for previous versions
+ it was based on.  These may be placed in the &ldquo;History&rdquo; section. 
+ You may omit a network location for a work that was published at
+ least four years before the Document itself, or if the original
+ publisher of the version it refers to gives permission.
+ 
+           <li>For any section Entitled &ldquo;Acknowledgements&rdquo; or &ldquo;Dedications&rdquo;, Preserve
+ the Title of the section, and preserve in the section all the
+ substance and tone of each of the contributor acknowledgements and/or
+ dedications given therein.
+ 
+           <li>Preserve all the Invariant Sections of the Document,
+ unaltered in their text and in their titles.  Section numbers
+ or the equivalent are not considered part of the section titles.
+ 
+           <li>Delete any section Entitled &ldquo;Endorsements&rdquo;.  Such a section
+ may not be included in the Modified Version.
+ 
+           <li>Do not retitle any existing section to be Entitled &ldquo;Endorsements&rdquo; or
+ to conflict in title with any Invariant Section.
+ 
+           <li>Preserve any Warranty Disclaimers.
+           </ol>
+ 
+      <p>If the Modified Version includes new front-matter sections or
+ appendices that qualify as Secondary Sections and contain no material
+ copied from the Document, you may at your option designate some or all
+ of these sections as invariant.  To do this, add their titles to the
+ list of Invariant Sections in the Modified Version's license notice. 
+ These titles must be distinct from any other section titles.
+ 
+      <p>You may add a section Entitled &ldquo;Endorsements&rdquo;, provided it contains
+ nothing but endorsements of your Modified Version by various
+ parties&mdash;for example, statements of peer review or that the text has
+ been approved by an organization as the authoritative definition of a
+ standard.
+ 
+      <p>You may add a passage of up to five words as a Front-Cover Text, and a
+ passage of up to 25 words as a Back-Cover Text, to the end of the list
+ of Cover Texts in the Modified Version.  Only one passage of
+ Front-Cover Text and one of Back-Cover Text may be added by (or
+ through arrangements made by) any one entity.  If the Document already
+ includes a cover text for the same cover, previously added by you or
+ by arrangement made by the same entity you are acting on behalf of,
+ you may not add another; but you may replace the old one, on explicit
+ permission from the previous publisher that added the old one.
+ 
+      <p>The author(s) and publisher(s) of the Document do not by this License
+ give permission to use their names for publicity for or to assert or
+ imply endorsement of any Modified Version.
+ 
+      <li>COMBINING DOCUMENTS
+ 
+      <p>You may combine the Document with other documents released under this
+ License, under the terms defined in section 4 above for modified
+ versions, provided that you include in the combination all of the
+ Invariant Sections of all of the original documents, unmodified, and
+ list them all as Invariant Sections of your combined work in its
+ license notice, and that you preserve all their Warranty Disclaimers.
+ 
+      <p>The combined work need only contain one copy of this License, and
+ multiple identical Invariant Sections may be replaced with a single
+ copy.  If there are multiple Invariant Sections with the same name but
+ different contents, make the title of each such section unique by
+ adding at the end of it, in parentheses, the name of the original
+ author or publisher of that section if known, or else a unique number. 
+ Make the same adjustment to the section titles in the list of
+ Invariant Sections in the license notice of the combined work.
+ 
+      <p>In the combination, you must combine any sections Entitled &ldquo;History&rdquo;
+ in the various original documents, forming one section Entitled
+ &ldquo;History&rdquo;; likewise combine any sections Entitled &ldquo;Acknowledgements&rdquo;,
+ and any sections Entitled &ldquo;Dedications&rdquo;.  You must delete all
+ sections Entitled &ldquo;Endorsements.&rdquo;
+ 
+      <li>COLLECTIONS OF DOCUMENTS
+ 
+      <p>You may make a collection consisting of the Document and other documents
+ released under this License, and replace the individual copies of this
+ License in the various documents with a single copy that is included in
+ the collection, provided that you follow the rules of this License for
+ verbatim copying of each of the documents in all other respects.
+ 
+      <p>You may extract a single document from such a collection, and distribute
+ it individually under this License, provided you insert a copy of this
+ License into the extracted document, and follow this License in all
+ other respects regarding verbatim copying of that document.
+ 
+      <li>AGGREGATION WITH INDEPENDENT WORKS
+ 
+      <p>A compilation of the Document or its derivatives with other separate
+ and independent documents or works, in or on a volume of a storage or
+ distribution medium, is called an &ldquo;aggregate&rdquo; if the copyright
+ resulting from the compilation is not used to limit the legal rights
+ of the compilation's users beyond what the individual works permit. 
+ When the Document is included in an aggregate, this License does not
+ apply to the other works in the aggregate which are not themselves
+ derivative works of the Document.
+ 
+      <p>If the Cover Text requirement of section 3 is applicable to these
+ copies of the Document, then if the Document is less than one half of
+ the entire aggregate, the Document's Cover Texts may be placed on
+ covers that bracket the Document within the aggregate, or the
+ electronic equivalent of covers if the Document is in electronic form. 
+ Otherwise they must appear on printed covers that bracket the whole
+ aggregate.
+ 
+      <li>TRANSLATION
+ 
+      <p>Translation is considered a kind of modification, so you may
+ distribute translations of the Document under the terms of section 4. 
+ Replacing Invariant Sections with translations requires special
+ permission from their copyright holders, but you may include
+ translations of some or all Invariant Sections in addition to the
+ original versions of these Invariant Sections.  You may include a
+ translation of this License, and all the license notices in the
+ Document, and any Warranty Disclaimers, provided that you also include
+ the original English version of this License and the original versions
+ of those notices and disclaimers.  In case of a disagreement between
+ the translation and the original version of this License or a notice
+ or disclaimer, the original version will prevail.
+ 
+      <p>If a section in the Document is Entitled &ldquo;Acknowledgements&rdquo;,
+ &ldquo;Dedications&rdquo;, or &ldquo;History&rdquo;, the requirement (section 4) to Preserve
+ its Title (section 1) will typically require changing the actual
+ title.
+ 
+      <li>TERMINATION
+ 
+      <p>You may not copy, modify, sublicense, or distribute the Document
+ except as expressly provided under this License.  Any attempt
+ otherwise to copy, modify, sublicense, or distribute it is void, and
+ will automatically terminate your rights under this License.
+ 
+      <p>However, if you cease all violation of this License, then your license
+ from a particular copyright holder is reinstated (a) provisionally,
+ unless and until the copyright holder explicitly and finally
+ terminates your license, and (b) permanently, if the copyright holder
+ fails to notify you of the violation by some reasonable means prior to
+ 60 days after the cessation.
+ 
+      <p>Moreover, your license from a particular copyright holder is
+ reinstated permanently if the copyright holder notifies you of the
+ violation by some reasonable means, this is the first time you have
+ received notice of violation of this License (for any work) from that
+ copyright holder, and you cure the violation prior to 30 days after
+ your receipt of the notice.
+ 
+      <p>Termination of your rights under this section does not terminate the
+ licenses of parties who have received copies or rights from you under
+ this License.  If your rights have been terminated and not permanently
+ reinstated, receipt of a copy of some or all of the same material does
+ not give you any rights to use it.
+ 
+      <li>FUTURE REVISIONS OF THIS LICENSE
+ 
+      <p>The Free Software Foundation may publish new, revised versions
+ of the GNU Free Documentation License from time to time.  Such new
+ versions will be similar in spirit to the present version, but may
+ differ in detail to address new problems or concerns.  See
+ <a href="http://www.gnu.org/copyleft/">http://www.gnu.org/copyleft/</a>.
+ 
+      <p>Each version of the License is given a distinguishing version number. 
+ If the Document specifies that a particular numbered version of this
+ License &ldquo;or any later version&rdquo; applies to it, you have the option of
+ following the terms and conditions either of that specified version or
+ of any later version that has been published (not as a draft) by the
+ Free Software Foundation.  If the Document does not specify a version
+ number of this License, you may choose any version ever published (not
+ as a draft) by the Free Software Foundation.  If the Document
+ specifies that a proxy can decide which future versions of this
+ License can be used, that proxy's public statement of acceptance of a
+ version permanently authorizes you to choose that version for the
+ Document.
+ 
+      <li>RELICENSING
+ 
+      <p>&ldquo;Massive Multiauthor Collaboration Site&rdquo; (or &ldquo;MMC Site&rdquo;) means any
+ World Wide Web server that publishes copyrightable works and also
+ provides prominent facilities for anybody to edit those works.  A
+ public wiki that anybody can edit is an example of such a server.  A
+ &ldquo;Massive Multiauthor Collaboration&rdquo; (or &ldquo;MMC&rdquo;) contained in the
+ site means any set of copyrightable works thus published on the MMC
+ site.
+ 
+      <p>&ldquo;CC-BY-SA&rdquo; means the Creative Commons Attribution-Share Alike 3.0
+ license published by Creative Commons Corporation, a not-for-profit
+ corporation with a principal place of business in San Francisco,
+ California, as well as future copyleft versions of that license
+ published by that same organization.
+ 
+      <p>&ldquo;Incorporate&rdquo; means to publish or republish a Document, in whole or
+ in part, as part of another Document.
+ 
+      <p>An MMC is &ldquo;eligible for relicensing&rdquo; if it is licensed under this
+ License, and if all works that were first published under this License
+ somewhere other than this MMC, and subsequently incorporated in whole
+ or in part into the MMC, (1) had no cover texts or invariant sections,
+ and (2) were thus incorporated prior to November 1, 2008.
+ 
+      <p>The operator of an MMC Site may republish an MMC contained in the site
+ under CC-BY-SA on the same site at any time before August 1, 2009,
+ provided the MMC is eligible for relicensing.
+ 
+         </ol>
+ 
+ <h3 class="heading">ADDENDUM: How to use this License for your documents</h3>
+ 
+ <p>To use this License in a document you have written, include a copy of
+ the License in the document and put the following copyright and
+ license notices just after the title page:
+ 
+ <pre class="smallexample">       Copyright (C)  <var>year</var>  <var>your name</var>.
+        Permission is granted to copy, distribute and/or modify this document
+        under the terms of the GNU Free Documentation License, Version 1.3
+        or any later version published by the Free Software Foundation;
+        with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+        Texts.  A copy of the license is included in the section entitled ``GNU
+        Free Documentation License''.
+ </pre>
+    <p>If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+ replace the &ldquo;with<small class="dots">...</small>Texts.&rdquo; line with this:
+ 
+ <pre class="smallexample">         with the Invariant Sections being <var>list their titles</var>, with
+          the Front-Cover Texts being <var>list</var>, and with the Back-Cover Texts
+          being <var>list</var>.
+ </pre>
+    <p>If you have Invariant Sections without Cover Texts, or some other
+ combination of the three, merge those two alternatives to suit the
+ situation.
+ 
+    <p>If your document contains nontrivial examples of program code, we
+ recommend releasing these examples in parallel under your choice of
+ free software license, such as the GNU General Public License,
+ to permit their use in free software.
+ 
+ <!-- Local Variables: -->
+ <!-- ispell-local-pdict: "ispell-dict" -->
+ <!-- End: -->
+ <!-- The Data Type Index is merged with the Variable Index, because the -->
+ <!-- former has so few entries. -->
+ <!-- "@syncodeindex tp vr" appears after "@c %**end of header", above. -->
+ <!-- LDF 2003.09.01. -->
+ <!-- varidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Data-Type-and-Variable-Index"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Function-Index">Function Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#GNU-Free-Documentation-License">GNU Free Documentation License</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="unnumbered">Data Type and Variable Index</h2>
+ 
+ <ul class="index-vr" compact>
+ <li><a href="#index-angle-478"><code>angle</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-angle_005fhex_005fhex-881"><code>angle_hex_hex</code></a>: <a href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="#index-angle_005fhex_005fsquare-880"><code>angle_hex_square</code></a>: <a href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="#index-arrow-536"><code>arrow</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-axis-479"><code>axis</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-axis_005fh-712"><code>axis_h</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-axis_005fh-672"><code>axis_h</code></a>: <a href="#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="#index-axis_005fv-713"><code>axis_v</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-axis_005fv-673"><code>axis_v</code></a>: <a href="#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="#index-AXON-329"><code>AXON</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-background_005fcolor-217"><code>background_color</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-background_005fcolor_005fvector-222"><code>background_color_vector</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-black-212"><code>black</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-blue-199"><code>blue</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-blue_005fpart-169"><code>blue_part</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-blue_005fviolet-210"><code>blue_violet</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-bool_005fpair-138"><code>bool_pair</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint-355"><code>bool_point</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint_005fpair-359"><code>bool_point_pair</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint_005fquadruple-360"><code>bool_point_quadruple</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005freal-139"><code>bool_real</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005freal_005fpoint-364"><code>bool_real_point</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-center-776"><code>center</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-center-693"><code>center</code></a>: <a href="#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a></li>
+ <li><a href="#index-center-637"><code>center</code></a>: <a href="#Polygon-Data-Members">Polygon Data Members</a></li>
+ <li><a href="#index-CIRCLE-784"><code>CIRCLE</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Circle-759"><code>Circle</code></a>: <a href="#Circle-Reference">Circle Reference</a></li>
+ <li><a href="#index-Circle-57"><code>Circle</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-circles-779"><code>circles</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Color-162"><code>Color</code></a>: <a href="#Color-Reference">Color Reference</a></li>
+ <li><a href="#index-connectors-539"><code>connectors</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-Cuboid-840"><code>Cuboid</code></a>: <a href="#Cuboid-Reference">Cuboid Reference</a></li>
+ <li><a href="#index-Cuboid-63"><code>Cuboid</code></a>: <a href="#Cuboid-Getstart">Cuboid Getstart</a></li>
+ <li><a href="#index-CURR_005fY-352"><code>CURR_Y</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-CURR_005fZ-353"><code>CURR_Z</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-cyan-200"><code>cyan</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-cycle_005fswitch-528"><code>cycle_switch</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-dashed-534"><code>dashed</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-default_005fbackground-216"><code>default_background</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-default_005fcolor-218"><code>default_color</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-default_005fcolor_005fvector-220"><code>default_color_vector</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-default_005ffocus-482"><code>default_focus</code></a>: <a href="#Focus-Global-Variables">Focus Global Variables</a></li>
+ <li><a href="#index-DEFAULT_005fNUMBER_005fOF_005fPOINTS-714"><code>DEFAULT_NUMBER_OF_POINTS</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-depth-843"><code>depth</code></a>: <a href="#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="#index-dihedral_005fangle-872"><code>dihedral_angle</code></a>: <a href="#Icosahedron-Data-Members">Icosahedron Data Members</a></li>
+ <li><a href="#index-dihedral_005fangle-865"><code>dihedral_angle</code></a>: <a href="#Dodecahedron-Data-Members">Dodecahedron Data Members</a></li>
+ <li><a href="#index-dihedral_005fangle-857"><code>dihedral_angle</code></a>: <a href="#Tetrahedron-Data-Members">Tetrahedron Data Members</a></li>
+ <li><a href="#index-direction-501"><code>direction</code></a>: <a href="#Line-Data-Members">Line Data Members</a></li>
+ <li><a href="#index-direction-475"><code>direction</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-distance-511"><code>distance</code></a>: <a href="#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="#index-distance-477"><code>distance</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-do_005fhelp_005flines-542"><code>do_help_lines</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-do_005flabels-305"><code>do_labels</code></a>: <a href="#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="#index-DO_005fLABELS-298"><code>DO_LABELS</code></a>: <a href="#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="#index-do_005foutput-777"><code>do_output</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-do_005foutput-530"><code>do_output</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-do_005foutput-350"><code>do_output</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-Dodecahedron-864"><code>Dodecahedron</code></a>: <a href="#Dodecahedron">Dodecahedron</a></li>
+ <li><a href="#index-Dodecahedron-66"><code>Dodecahedron</code></a>: <a href="#Dodecahedron-Getstart">Dodecahedron Getstart</a></li>
+ <li><a href="#index-dot-295"><code>dot</code></a>: <a href="#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="#index-DRAW-234"><code>DRAW</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-draw_005fcolor-532"><code>draw_color</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-DRAWDOT-233"><code>DRAWDOT</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-drawdot_005fcolor-347"><code>drawdot_color</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-drawdot_005fvalue-346"><code>drawdot_value</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-edge_005fradius-854"><code>edge_radius</code></a>: <a href="#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="#index-edges-839"><code>edges</code></a>: <a href="#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="#index-ELLIPSE-785"><code>ELLIPSE</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Ellipse-707"><code>Ellipse</code></a>: <a href="#Ellipse-Reference">Ellipse Reference</a></li>
+ <li><a href="#index-Ellipse-58"><code>Ellipse</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-ellipses-780"><code>ellipses</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-face_005fradius-853"><code>face_radius</code></a>: <a href="#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="#index-faces-837"><code>faces</code></a>: <a href="#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="#index-FILL-235"><code>FILL</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-fill_005fcolor-533"><code>fill_color</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-fill_005fdraw_005fvalue-531"><code>fill_draw_value</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-FILLDRAW-236"><code>FILLDRAW</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-Focus-473"><code>Focus</code></a>: <a href="#Focus-Reference">Focus Reference</a></li>
+ <li><a href="#index-focus-75"><code>focus</code></a>: <a href="#Focuses-Getstart">Focuses Getstart</a></li>
+ <li><a href="#index-focus0-708"><code>focus0</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-focus1-709"><code>focus1</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-gray-214"><code>gray</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-green-198"><code>green</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-green_005fpart-168"><code>green_part</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-green_005fyellow-206"><code>green_yellow</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-height-841"><code>height</code></a>: <a href="#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="#index-help_005fcolor-540"><code>help_color</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-help_005fcolor-219"><code>help_color</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-help_005fcolor_005fvector-221"><code>help_color_vector</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-help_005fdash_005fpattern-541"><code>help_dash_pattern</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-hexagon_005fradius-882"><code>hexagon_radius</code></a>: <a href="#Truncated-Octahedron-Data-Members">Truncated Octahedron Data Members</a></li>
+ <li><a href="#index-Icosahedron-871"><code>Icosahedron</code></a>: <a href="#Icosahedron">Icosahedron</a></li>
+ <li><a href="#index-Icosahedron-67"><code>Icosahedron</code></a>: <a href="#Icosahedron-Getstart">Icosahedron Getstart</a></li>
+ <li><a href="#index-IDENTITY_005fTRANSFORM-266"><code>IDENTITY_TRANSFORM</code></a>: <a href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="#index-in_005fstream-223"><code>in_stream</code></a>: <a href="#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="#index-internal_005fangle-654"><code>internal_angle</code></a>: <a href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="#index-INVALID_005fBOOL_005fPOINT-371"><code>INVALID_BOOL_POINT</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fBOOL_005fPOINT_005fPAIR-372"><code>INVALID_BOOL_POINT_PAIR</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fBOOL_005fPOINT_005fQUADRUPLE-374"><code>INVALID_BOOL_POINT_QUADRUPLE</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fBOOL_005fREAL_005fPOINT-373"><code>INVALID_BOOL_REAL_POINT</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fLINE-502"><code>INVALID_LINE</code></a>: <a href="#Line-Global-Constants">Line Global Constants</a></li>
+ <li><a href="#index-INVALID_005fPLANE-512"><code>INVALID_PLANE</code></a>: <a href="#Planes-Global-Constants">Planes Global Constants</a></li>
+ <li><a href="#index-INVALID_005fPOINT-369"><code>INVALID_POINT</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fREAL-144"><code>INVALID_REAL</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fREAL_005fPAIR-145"><code>INVALID_REAL_PAIR</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fREAL_005fSHORT-146"><code>INVALID_REAL_SHORT</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-INVALID_005fTRANSFORM-265"><code>INVALID_TRANSFORM</code></a>: <a href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="#index-ISO-330"><code>ISO</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-Label-293"><code>Label</code></a>: <a href="#Label-Reference">Label Reference</a></li>
+ <li><a href="#index-labels-304"><code>labels</code></a>: <a href="#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="#index-ldf_005freal_005fdouble-141"><code>ldf_real_double</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-ldf_005freal_005ffloat-140"><code>ldf_real_float</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-light_005fgray-215"><code>light_gray</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-Line-499"><code>Line</code></a>: <a href="#Line-Reference">Line Reference</a></li>
+ <li><a href="#index-line_005fswitch-526"><code>line_switch</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-linear_005feccentricity-710"><code>linear_eccentricity</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-magenta-202"><code>magenta</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-matrix-263"><code>matrix</code></a>: <a href="#Transform-Data-Members">Transform Data Members</a></li>
+ <li><a href="#index-Matrix-136"><code>Matrix</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-MAX_005fREAL-147"><code>MAX_REAL</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-MAX_005fREAL_005fSQRT-149"><code>MAX_REAL_SQRT</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-MAX_005fZ-332"><code>MAX_Z</code></a>: <a href="#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="#index-MEAN_005fZ-334"><code>MEAN_Z</code></a>: <a href="#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="#index-measurement_005funits-351"><code>measurement_units</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-measurement_005funits-_0028Point_0029-18"><code>measurement_units (Point)</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-MIN_005fZ-333"><code>MIN_Z</code></a>: <a href="#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="#index-name-163"><code>name</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-NO_005fSORT-331"><code>NO_SORT</code></a>: <a href="#Namespace-Sorting">Namespace Sorting</a></li>
+ <li><a href="#index-normal-510"><code>normal</code></a>: <a href="#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="#index-null_005fcoordinates-143"><code>null_coordinates</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-number_005fof_005fpoints-694"><code>number_of_points</code></a>: <a href="#Regular-Closed-Plane-Curve-Data-Members">Regular Closed Plane Curve Data Members</a></li>
+ <li><a href="#index-number_005fof_005fpolygon_005ftypes-852"><code>number_of_polygon_types</code></a>: <a href="#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="#index-numerical_005feccentricity-711"><code>numerical_eccentricity</code></a>: <a href="#Ellipse-Data-Members">Ellipse Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-775"><code>on_free_store</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-674"><code>on_free_store</code></a>: <a href="#Rectangle-Data-Members">Rectangle Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-657"><code>on_free_store</code></a>: <a href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-529"><code>on_free_store</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-345"><code>on_free_store</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-on_005ffree_005fstore-166"><code>on_free_store</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-orange-207"><code>orange</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-orange_005fred-203"><code>orange_red</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-origin-370"><code>origin</code></a>: <a href="#Point-Global-Constants-and-Variables">Point Global Constants and Variables</a></li>
+ <li><a href="#index-out_005fstream-224"><code>out_stream</code></a>: <a href="#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="#index-out_005fstream-70"><code>out_stream</code></a>: <a href="#Pictures">Pictures</a></li>
+ <li><a href="#index-PARALLEL_005fX_005fY-326"><code>PARALLEL_X_Y</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-PARALLEL_005fX_005fZ-327"><code>PARALLEL_X_Z</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-PARALLEL_005fZ_005fY-328"><code>PARALLEL_Z_Y</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-PATH-786"><code>PATH</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Path-525"><code>Path</code></a>: <a href="#Path-Reference">Path Reference</a></li>
+ <li><a href="#index-Path-50"><code>Path</code></a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-paths-778"><code>paths</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-pen-535"><code>pen</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-pen-348"><code>pen</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-pentagon_005fradius-866"><code>pentagon_radius</code></a>: <a href="#Dodecahedron-Data-Members">Dodecahedron Data Members</a></li>
+ <li><a href="#index-persp-481"><code>persp</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-PERSP-325"><code>PERSP</code></a>: <a href="#Namespace-Projections">Namespace Projections</a></li>
+ <li><a href="#index-PI-142"><code>PI</code></a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-Picture-306"><code>Picture</code></a>: <a href="#Picture-Global-Variables">Picture Global Variables</a></li>
+ <li><a href="#index-Picture-301"><code>Picture</code></a>: <a href="#Picture-Reference">Picture Reference</a></li>
+ <li><a href="#index-Picture-68"><code>Picture</code></a>: <a href="#Pictures">Pictures</a></li>
+ <li><a href="#index-pink-205"><code>pink</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-Plane-508"><code>Plane</code></a>: <a href="#Plane-Reference">Plane Reference</a></li>
+ <li><a href="#index-point-509"><code>point</code></a>: <a href="#Planes-Data-Members">Planes Data Members</a></li>
+ <li><a href="#index-Point-339"><code>Point</code></a>: <a href="#Point-Reference">Point Reference</a></li>
+ <li><a href="#index-Point-16"><code>Point</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-Point_003a_003ameasurement_005funits-17"><code>Point::measurement_units</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-Point_003a_003aprojective_005fcoordinates-25"><code>Point::projective_coordinates</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-Point_003a_003auser_005fcoordinates-23"><code>Point::user_coordinates</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-Point_003a_003aview_005fcoordinates-24"><code>Point::view_coordinates</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-Point_003a_003aworld_005fcoordinates-22"><code>Point::world_coordinates</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-point_005fpair-354"><code>point_pair</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-points-538"><code>points</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-Polygon-636"><code>Polygon</code></a>: <a href="#Polygon-Reference">Polygon Reference</a></li>
+ <li><a href="#index-Polygon-59"><code>Polygon</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-Polyhedron-851"><code>Polyhedron</code></a>: <a href="#Polyhedron-Reference">Polyhedron Reference</a></li>
+ <li><a href="#index-Polyhedron-64"><code>Polyhedron</code></a>: <a href="#Polyhedron-Getstart">Polyhedron Getstart</a></li>
+ <li><a href="#index-position-500"><code>position</code></a>: <a href="#Line-Data-Members">Line Data Members</a></li>
+ <li><a href="#index-position-474"><code>position</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-position-297"><code>position</code></a>: <a href="#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="#index-projective_005fcoordinates-341"><code>projective_coordinates</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-projective_005fcoordinates-_0028Point_0029-29"><code>projective_coordinates (Point)</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-projective_005fextremes-783"><code>projective_extremes</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-projective_005fextremes-537"><code>projective_extremes</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-projective_005fextremes-349"><code>projective_extremes</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-pt-294"><code>pt</code></a>: <a href="#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="#index-purple-209"><code>purple</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-radius-760"><code>radius</code></a>: <a href="#Circle-Data-Members">Circle Data Members</a></li>
+ <li><a href="#index-radius-655"><code>radius</code></a>: <a href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="#index-real-131"><code>real</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-real_005fpair-132"><code>real_pair</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-real_005fshort-137"><code>real_short</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-real_005ftriple-133"><code>real_triple</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-RECTANGLE-787"><code>RECTANGLE</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Rectangle-671"><code>Rectangle</code></a>: <a href="#Rectangle-Reference">Rectangle Reference</a></li>
+ <li><a href="#index-Rectangle-60"><code>Rectangle</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-rectangles-782"><code>rectangles</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-red-197"><code>red</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-red_005fpart-167"><code>red_part</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-Reg_005fCl_005fPlane_005fCurve-692"><code>Reg_Cl_Plane_Curve</code></a>: <a href="#Regular-Closed-Plane-Curve-Reference">Regular Closed Plane Curve Reference</a></li>
+ <li><a href="#index-Reg_005fCl_005fPlane_005fCurve-61"><code>Reg_Cl_Plane_Curve</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-REG_005fPOLYGON-788"><code>REG_POLYGON</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Reg_005fPolygon-653"><code>Reg_Polygon</code></a>: <a href="#Regular-Polygon-Reference">Regular Polygon Reference</a></li>
+ <li><a href="#index-Reg_005fPolygon-62"><code>Reg_Polygon</code></a>: <a href="#Plane-Figures">Plane Figures</a></li>
+ <li><a href="#index-reg_005fpolygons-781"><code>reg_polygons</code></a>: <a href="#Solid-Data-Members">Solid Data Members</a></li>
+ <li><a href="#index-Shape-232"><code>Shape</code></a>: <a href="#Shape-Reference">Shape Reference</a></li>
+ <li><a href="#index-shapes-303"><code>shapes</code></a>: <a href="#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="#index-short-656"><code>short</code></a>: <a href="#Regular-Polygon-Data-Members">Regular Polygon Data Members</a></li>
+ <li><a href="#index-Solid-774"><code>Solid</code></a>: <a href="#Solid-Reference">Solid Reference</a></li>
+ <li><a href="#index-Solid_005fFaced-836"><code>Solid_Faced</code></a>: <a href="#Faced-Solid-Reference">Faced Solid Reference</a></li>
+ <li><a href="#index-Tetrahedron-856"><code>Tetrahedron</code></a>: <a href="#Tetrahedron">Tetrahedron</a></li>
+ <li><a href="#index-Tetrahedron-65"><code>Tetrahedron</code></a>: <a href="#Tetrahedron-Getstart">Tetrahedron Getstart</a></li>
+ <li><a href="#index-tex_005fstream-225"><code>tex_stream</code></a>: <a href="#I_002fO-Global-Variables">I/O Global Variables</a></li>
+ <li><a href="#index-text-296"><code>text</code></a>: <a href="#Label-Data-Members">Label Data Members</a></li>
+ <li><a href="#index-transform-480"><code>transform</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-transform-344"><code>transform</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-transform-302"><code>transform</code></a>: <a href="#Picture-Data-Members">Picture Data Members</a></li>
+ <li><a href="#index-Transform-262"><code>Transform</code></a>: <a href="#Transform-Reference">Transform Reference</a></li>
+ <li><a href="#index-Transform-35"><code>Transform</code></a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-triangle_005fradius-873"><code>triangle_radius</code></a>: <a href="#Icosahedron-Data-Members">Icosahedron Data Members</a></li>
+ <li><a href="#index-triangle_005fradius-858"><code>triangle_radius</code></a>: <a href="#Tetrahedron-Data-Members">Tetrahedron Data Members</a></li>
+ <li><a href="#index-Trunc_005fOctahedron-878"><code>Trunc_Octahedron</code></a>: <a href="#Truncated-Octahedron">Truncated Octahedron</a></li>
+ <li><a href="#index-Truncated-Octahedron-879"><code>Truncated Octahedron</code></a>: <a href="#Truncated-Octahedron">Truncated Octahedron</a></li>
+ <li><a href="#index-UNDRAW-238"><code>UNDRAW</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-UNDRAWDOT-237"><code>UNDRAWDOT</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-UNFILL-239"><code>UNFILL</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-UNFILLDRAW-240"><code>UNFILLDRAW</code></a>: <a href="#Shape-Data-Members">Shape Data Members</a></li>
+ <li><a href="#index-up-476"><code>up</code></a>: <a href="#Focus-Data-Members">Focus Data Members</a></li>
+ <li><a href="#index-use_005fname-164"><code>use_name</code></a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-user_005fcoordinates-342"><code>user_coordinates</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-user_005fcoordinates-_0028Point_0029-27"><code>user_coordinates (Point)</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-user_005ftransform-264"><code>user_transform</code></a>: <a href="#Transform-Global-Variables-and-Constants">Transform Global Variables and Constants</a></li>
+ <li><a href="#index-vertex_005fradius-855"><code>vertex_radius</code></a>: <a href="#Polyhedron-Data-Members">Polyhedron Data Members</a></li>
+ <li><a href="#index-vertices-838"><code>vertices</code></a>: <a href="#Solid_005fFaced-Data-Members">Solid_Faced Data Members</a></li>
+ <li><a href="#index-view_005fcoordinates-343"><code>view_coordinates</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-view_005fcoordinates-_0028Point_0029-28"><code>view_coordinates (Point)</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-violet-208"><code>violet</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-violet_005fred-204"><code>violet_red</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-white-213"><code>white</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-width-842"><code>width</code></a>: <a href="#Cuboid-Data-Members">Cuboid Data Members</a></li>
+ <li><a href="#index-world_005fcoordinates-340"><code>world_coordinates</code></a>: <a href="#Point-Data-Members">Point Data Members</a></li>
+ <li><a href="#index-world_005fcoordinates-_0028Point_0029-26"><code>world_coordinates (Point)</code></a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-yellow-201"><code>yellow</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+ <li><a href="#index-yellow_005fgreen-211"><code>yellow_green</code></a>: <a href="#Namespace-Colors">Namespace Colors</a></li>
+    </ul><!-- funcidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Function-Index"></a>
+ <p><hr>
+ Next:&nbsp;<a rel="next" accesskey="n" href="#Concept-Index">Concept Index</a>,
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Data-Type-and-Variable-Index">Data Type and Variable Index</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="unnumbered">Function Index</h2>
+ 
+ 
+ 
+ <ul class="index-fn" compact>
+ <li><a href="#index-align_005fwith_005faxis-581"><code>align_with_axis</code></a>: <a href="#Aligning-Paths-with-an-Axis">Aligning Paths with an Axis</a></li>
+ <li><a href="#index-align_005fwith_005faxis-290"><code>align_with_axis</code></a>: <a href="#Alignment-with-an-Axis-for-Transforms">Alignment with an Axis for Transforms</a></li>
+ <li><a href="#index-angle-430"><code>angle</code></a>: <a href="#Vector-Operations">Vector Operations</a></li>
+ <li><a href="#index-angle_005fpoint-749"><code>angle_point</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-angle_005fpoint-701"><code>angle_point</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-append-560"><code>append</code></a>: <a href="#Appending-to-Paths">Appending to Paths</a></li>
+ <li><a href="#index-apply_005ftransform-818"><code>apply_transform</code></a>: <a href="#Applying-Transformations-to-Solids">Applying Transformations to Solids</a></li>
+ <li><a href="#index-apply_005ftransform-584"><code>apply_transform</code></a>: <a href="#Applying-Transformations-to-Paths">Applying Transformations to Paths</a></li>
+ <li><a href="#index-apply_005ftransform-424"><code>apply_transform</code></a>: <a href="#Applying-Transformations-to-Points">Applying Transformations to Points</a></li>
+ <li><a href="#index-apply_005ftransform-249"><code>apply_transform</code></a>: <a href="#Applying-Transformations-to-Shapes">Applying Transformations to Shapes</a></li>
+ <li><a href="#index-beginfig-230"><code>beginfig</code></a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-bool_005fpoint-356"><code>bool_point</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint_003a_003aoperator_003d-358"><code>bool_point::operator=</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint_005fquadruple-361"><code>bool_point_quadruple</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005fpoint_005fquadruple_003a_003aoperator_003d-363"><code>bool_point_quadruple::operator=</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005freal_005fpoint-365"><code>bool_real_point</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-bool_005freal_005fpoint_003a_003aoperator_003d-368"><code>bool_real_point::operator=</code></a>: <a href="#Point-Typedefs-and-Utility-Structures">Point Typedefs and Utility Structures</a></li>
+ <li><a href="#index-Circle-761"><code>Circle</code></a>: <a href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="#index-clean-413"><code>clean</code></a>: <a href="#Modifying-Points">Modifying Points</a></li>
+ <li><a href="#index-clean-292"><code>clean</code></a>: <a href="#Cleaning-Transforms">Cleaning Transforms</a></li>
+ <li><a href="#index-clear-835"><code>clear</code></a>: <a href="#Clearing-Solids">Clearing Solids</a></li>
+ <li><a href="#index-clear-562"><code>clear</code></a>: <a href="#Clearing-Paths">Clearing Paths</a></li>
+ <li><a href="#index-clear-412"><code>clear</code></a>: <a href="#Modifying-Points">Modifying Points</a></li>
+ <li><a href="#index-clear-319"><code>clear</code></a>: <a href="#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="#index-clear-250"><code>clear</code></a>: <a href="#Clearing-Shapes">Clearing Shapes</a></li>
+ <li><a href="#index-Color-170"><code>Color</code></a>: <a href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="#index-convert_002deps-129"><code>convert-eps</code></a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-convert_002deps_002dloop-130"><code>convert-eps-loop</code></a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-corner-683"><code>corner</code></a>: <a href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a></li>
+ <li><a href="#index-create_005fnew-151"><code>create_new</code></a>: <a href="#Dynamic-Allocation-of-Shapes">Dynamic Allocation of Shapes</a></li>
+ <li><a href="#index-create_005fnew_003cCircle_003e-764"><code>create_new&lt;Circle&gt;</code></a>: <a href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cColor_003e-176"><code>create_new&lt;Color&gt;</code></a>: <a href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cCuboid_003e-847"><code>create_new&lt;Cuboid&gt;</code></a>: <a href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cEllipse_003e-718"><code>create_new&lt;Ellipse&gt;</code></a>: <a href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cPath_003e-551"><code>create_new&lt;Path&gt;</code></a>: <a href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cPoint_003e-380"><code>create_new&lt;Point&gt;</code></a>: <a href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cRectangle_003e-680"><code>create_new&lt;Rectangle&gt;</code></a>: <a href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cReg_005fPolygon_003e-661"><code>create_new&lt;Reg_Polygon&gt;</code></a>: <a href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="#index-create_005fnew_003cSolid_003e-791"><code>create_new&lt;Solid&gt;</code></a>: <a href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a></li>
+ <li><a href="#index-cross_005fproduct-428"><code>cross_product</code></a>: <a href="#Vector-Operations">Vector Operations</a></li>
+ <li><a href="#index-Cuboid-844"><code>Cuboid</code></a>: <a href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="#index-define_005fcolor_005fmp-195"><code>define_color_mp</code></a>: <a href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a></li>
+ <li><a href="#index-do_005ftransform-720"><code>do_transform</code></a>: <a href="#Performing-Transformations-on-Ellipses">Performing Transformations on Ellipses</a></li>
+ <li><a href="#index-Dodecahedron-867"><code>Dodecahedron</code></a>: <a href="#Dodecahedron-Constructors-and-Setting-Functions">Dodecahedron Constructors and Setting Functions</a></li>
+ <li><a href="#index-dot_005fproduct-427"><code>dot_product</code></a>: <a href="#Vector-Operations">Vector Operations</a></li>
+ <li><a href="#index-dotlabel-724"><code>dotlabel</code></a>: <a href="#Labeling-Ellipses">Labeling Ellipses</a></li>
+ <li><a href="#index-dotlabel-604"><code>dotlabel</code></a>: <a href="#Labelling-Paths">Labelling Paths</a></li>
+ <li><a href="#index-dotlabel-459"><code>dotlabel</code></a>: <a href="#Labelling-Points">Labelling Points</a></li>
+ <li><a href="#index-draw-828"><code>draw</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-draw-585"><code>draw</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-draw-448"><code>draw</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-draw_005faxes-591"><code>draw_axes</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-draw_005fhelp-587"><code>draw_help</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-draw_005fhelp-453"><code>draw_help</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-draw_005fin_005fcircle-666"><code>draw_in_circle</code></a>: <a href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="#index-draw_005fin_005fellipse-691"><code>draw_in_ellipse</code></a>: <a href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="#index-draw_005fin_005frectangle-758"><code>draw_in_rectangle</code></a>: <a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="#index-draw_005fnet-877"><code>draw_net</code></a>: <a href="#Icosahedron-Net">Icosahedron Net</a></li>
+ <li><a href="#index-draw_005fnet-870"><code>draw_net</code></a>: <a href="#Dodecahedron-Net">Dodecahedron Net</a></li>
+ <li><a href="#index-draw_005fnet-863"><code>draw_net</code></a>: <a href="#Tetrahedron-Net">Tetrahedron Net</a></li>
+ <li><a href="#index-draw_005fout_005fcircle-669"><code>draw_out_circle</code></a>: <a href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="#index-draw_005fout_005fellipse-690"><code>draw_out_ellipse</code></a>: <a href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="#index-draw_005fout_005frectangle-757"><code>draw_out_rectangle</code></a>: <a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="#index-drawarrow-589"><code>drawarrow</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-drawarrow-455"><code>drawarrow</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-drawdot-444"><code>drawdot</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-Ellipse-715"><code>Ellipse</code></a>: <a href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="#index-endfig-231"><code>endfig</code></a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-epicycloid_005fpattern_005f1-773"><code>epicycloid_pattern_1</code></a>: <a href="#Epicycloids">Epicycloids</a></li>
+ <li><a href="#index-epsilon-410"><code>epsilon</code></a>: <a href="#Returning-Information-for-Points">Returning Information for Points</a></li>
+ <li><a href="#index-epsilon-280"><code>epsilon</code></a>: <a href="#Returning-Information-for-Transforms">Returning Information for Transforms</a></li>
+ <li><a href="#index-extract-822"><code>extract</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-extract-626"><code>extract</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-extract-467"><code>extract</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-extract-254"><code>extract</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-fill-829"><code>fill</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-fill-593"><code>fill</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-filldraw-830"><code>filldraw</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-filldraw-595"><code>filldraw</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-Focus-483"><code>Focus</code></a>: <a href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a></li>
+ <li><a href="#index-get_005fall_005fcoords-404"><code>get_all_coords</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-get_005faxis_005fh-746"><code>get_axis_h</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005faxis_005fh-685"><code>get_axis_h</code></a>: <a href="#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="#index-get_005faxis_005fv-744"><code>get_axis_v</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005faxis_005fv-686"><code>get_axis_v</code></a>: <a href="#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="#index-get_005fblue_005fpart-192"><code>get_blue_part</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-get_005fcenter-799"><code>get_center</code></a>: <a href="#Returning-Elements-and-Information-Solids">Returning Elements and Information Solids</a></li>
+ <li><a href="#index-get_005fcenter-738"><code>get_center</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005fcenter-639"><code>get_center</code></a>: <a href="#Querying-Polygons">Querying Polygons</a></li>
+ <li><a href="#index-get_005fcircle_005fcenter-801"><code>get_circle_center</code></a>: <a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="#index-get_005fcircle_005fptr-806"><code>get_circle_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fcoefficients-754"><code>get_coefficients</code></a>: <a href="#Solving-Ellipses">Solving Ellipses</a></li>
+ <li><a href="#index-get_005fcoefficients-698"><code>get_coefficients</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-get_005fcoord-405"><code>get_coord</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-get_005fcopy-796"><code>get_copy</code></a>: <a href="#Copying-Solids">Copying Solids</a></li>
+ <li><a href="#index-get_005fcopy-561"><code>get_copy</code></a>: <a href="#Copying-Paths">Copying Paths</a></li>
+ <li><a href="#index-get_005fcopy-398"><code>get_copy</code></a>: <a href="#Copying-Points">Copying Points</a></li>
+ <li><a href="#index-get_005fcopy-299"><code>get_copy</code></a>: <a href="#Copying-Labels">Copying Labels</a></li>
+ <li><a href="#index-get_005fcopy-242"><code>get_copy</code></a>: <a href="#Copying-Shapes">Copying Shapes</a></li>
+ <li><a href="#index-get_005fdiameter-770"><code>get_diameter</code></a>: <a href="#Querying-Circles">Querying Circles</a></li>
+ <li><a href="#index-get_005fdirection-491"><code>get_direction</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fdistance-519"><code>get_distance</code></a>: <a href="#Planes-Returning-Information">Planes Returning Information</a></li>
+ <li><a href="#index-get_005fdistance-492"><code>get_distance</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005felement-279"><code>get_element</code></a>: <a href="#Querying-Transforms">Querying Transforms</a></li>
+ <li><a href="#index-get_005fellipse_005fcenter-802"><code>get_ellipse_center</code></a>: <a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="#index-get_005fellipse_005fptr-807"><code>get_ellipse_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fendianness-153"><code>get_endianness</code></a>: <a href="#Endianness">Endianness</a></li>
+ <li><a href="#index-get_005fextremes-824"><code>get_extremes</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-get_005fextremes-628"><code>get_extremes</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-get_005fextremes-469"><code>get_extremes</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-get_005fextremes-259"><code>get_extremes</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-get_005ffocus-740"><code>get_focus</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005fgreen_005fpart-191"><code>get_green_part</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-get_005flast_005fpoint-617"><code>get_last_point</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005fline-619"><code>get_line</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005fline-433"><code>get_line</code></a>: <a href="#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="#index-get_005fline_005fswitch-613"><code>get_line_switch</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005flinear_005feccentricity-742"><code>get_linear_eccentricity</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005fmaximum_005fz-826"><code>get_maximum_z</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-get_005fmaximum_005fz-631"><code>get_maximum_z</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-get_005fmaximum_005fz-471"><code>get_maximum_z</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-get_005fmaximum_005fz-257"><code>get_maximum_z</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-get_005fmean_005fz-827"><code>get_mean_z</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-get_005fmean_005fz-630"><code>get_mean_z</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-get_005fmean_005fz-472"><code>get_mean_z</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-get_005fmean_005fz-258"><code>get_mean_z</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-get_005fminimum_005fz-825"><code>get_minimum_z</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-get_005fminimum_005fz-629"><code>get_minimum_z</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-get_005fminimum_005fz-470"><code>get_minimum_z</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-get_005fminimum_005fz-256"><code>get_minimum_z</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-get_005fname-194"><code>get_name</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-get_005fnet-885"><code>get_net</code></a>: <a href="#Truncated-Octahedron-Net">Truncated Octahedron Net</a></li>
+ <li><a href="#index-get_005fnet-876"><code>get_net</code></a>: <a href="#Icosahedron-Net">Icosahedron Net</a></li>
+ <li><a href="#index-get_005fnet-869"><code>get_net</code></a>: <a href="#Dodecahedron-Net">Dodecahedron Net</a></li>
+ <li><a href="#index-get_005fnet-862"><code>get_net</code></a>: <a href="#Tetrahedron-Net">Tetrahedron Net</a></li>
+ <li><a href="#index-get_005fnormal-620"><code>get_normal</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005fnumerical_005feccentricity-743"><code>get_numerical_eccentricity</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-get_005fpath-506"><code>get_path</code></a>: <a href="#Get-Path">Get Path</a></li>
+ <li><a href="#index-get_005fpath_005fptr-808"><code>get_path_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fpersp-496"><code>get_persp</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fpersp_005felement-497"><code>get_persp_element</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fplane-621"><code>get_plane</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005fpoint-616"><code>get_point</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005fposition-490"><code>get_position</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fradius-769"><code>get_radius</code></a>: <a href="#Querying-Circles">Querying Circles</a></li>
+ <li><a href="#index-get_005fradius-664"><code>get_radius</code></a>: <a href="#Querying-Regular-Polygons">Querying Regular Polygons</a></li>
+ <li><a href="#index-get_005frectangle_005fcenter-803"><code>get_rectangle_center</code></a>: <a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="#index-get_005frectangle_005fptr-809"><code>get_rectangle_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fred_005fpart-190"><code>get_red_part</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-get_005freg_005fpolygon_005fcenter-804"><code>get_reg_polygon_center</code></a>: <a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="#index-get_005freg_005fpolygon_005fptr-810"><code>get_reg_polygon_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fregister_005fwidth-156"><code>get_register_width</code></a>: <a href="#Register-Width">Register Width</a></li>
+ <li><a href="#index-get_005fsecond_005flargest-159"><code>get_second_largest</code></a>: <a href="#Get-Second-Largest-Real">Get Second Largest Real</a></li>
+ <li><a href="#index-get_005fshape_005fcenter-800"><code>get_shape_center</code></a>: <a href="#Getting-Shape-Centers-Solids">Getting Shape Centers Solids</a></li>
+ <li><a href="#index-get_005fshape_005fptr-805"><code>get_shape_ptr</code></a>: <a href="#Getting-Shapes-Solids">Getting Shapes Solids</a></li>
+ <li><a href="#index-get_005fsize-618"><code>get_size</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-get_005ftransform-494"><code>get_transform</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005ftransform-400"><code>get_transform</code></a>: <a href="#Querying-Points">Querying Points</a></li>
+ <li><a href="#index-get_005ftransform_005felement-495"><code>get_transform_element</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fup-493"><code>get_up</code></a>: <a href="#Querying-Focuses">Querying Focuses</a></li>
+ <li><a href="#index-get_005fuse_005fname-193"><code>get_use_name</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-get_005fw-409"><code>get_w</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-get_005fx-406"><code>get_x</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-get_005fy-407"><code>get_y</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-get_005fz-408"><code>get_z</code></a>: <a href="#Returning-Coordinates">Returning Coordinates</a></li>
+ <li><a href="#index-half-705"><code>half</code></a>: <a href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="#index-hex_005fpattern_005f1-772"><code>hex_pattern_1</code></a>: <a href="#Plane-Tesselations">Plane Tesselations</a></li>
+ <li><a href="#index-Icosahedron-874"><code>Icosahedron</code></a>: <a href="#Icosahedron-Constructors-and-Setting-Functions">Icosahedron Constructors and Setting Functions</a></li>
+ <li><a href="#index-in_005fcircle-665"><code>in_circle</code></a>: <a href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="#index-in_005fellipse-689"><code>in_ellipse</code></a>: <a href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="#index-in_005frectangle-756"><code>in_rectangle</code></a>: <a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="#index-initialize_005fcolors-196"><code>initialize_colors</code></a>: <a href="#Defining-and-Initializing-Colors">Defining and Initializing Colors</a></li>
+ <li><a href="#index-initialize_005fio-226"><code>initialize_io</code></a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-intersection_005fline-523"><code>intersection_line</code></a>: <a href="#Plane-Intersections">Plane Intersections</a></li>
+ <li><a href="#index-intersection_005fpoint-635"><code>intersection_point</code></a>: <a href="#Path-Intersections">Path Intersections</a></li>
+ <li><a href="#index-intersection_005fpoint-521"><code>intersection_point</code></a>: <a href="#Plane-Intersections">Plane Intersections</a></li>
+ <li><a href="#index-intersection_005fpoint-439"><code>intersection_point</code></a>: <a href="#Point-Intersections">Point Intersections</a></li>
+ <li><a href="#index-intersection_005fpoints-771"><code>intersection_points</code></a>: <a href="#Circle-Intersections">Circle Intersections</a></li>
+ <li><a href="#index-intersection_005fpoints-750"><code>intersection_points</code></a>: <a href="#Ellipse-Intersections">Ellipse Intersections</a></li>
+ <li><a href="#index-intersection_005fpoints-702"><code>intersection_points</code></a>: <a href="#Regular-Closed-Plane-Curve-Intersections">Regular Closed Plane Curve Intersections</a></li>
+ <li><a href="#index-intersection_005fpoints-650"><code>intersection_points</code></a>: <a href="#Polygon-Intersections">Polygon Intersections</a></li>
+ <li><a href="#index-inverse-275"><code>inverse</code></a>: <a href="#Matrix-Inversion">Matrix Inversion</a></li>
+ <li><a href="#index-is_005f32_005fbit-157"><code>is_32_bit</code></a>: <a href="#Register-Width">Register Width</a></li>
+ <li><a href="#index-is_005f64_005fbit-158"><code>is_64_bit</code></a>: <a href="#Register-Width">Register Width</a></li>
+ <li><a href="#index-is_005fbig_005fendian-154"><code>is_big_endian</code></a>: <a href="#Endianness">Endianness</a></li>
+ <li><a href="#index-is_005fcircular-768"><code>is_circular</code></a>: <a href="#Querying-Circles">Querying Circles</a></li>
+ <li><a href="#index-is_005fcubic-736"><code>is_cubic</code></a>: <a href="#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="#index-is_005fcubic-696"><code>is_cubic</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-is_005fcycle-611"><code>is_cycle</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-is_005felliptical-734"><code>is_elliptical</code></a>: <a href="#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="#index-is_005fidentity-399"><code>is_identity</code></a>: <a href="#Querying-Points">Querying Points</a></li>
+ <li><a href="#index-is_005fidentity-278"><code>is_identity</code></a>: <a href="#Querying-Transforms">Querying Transforms</a></li>
+ <li><a href="#index-is_005fin_005ftriangle-403"><code>is_in_triangle</code></a>: <a href="#Querying-Points">Querying Points</a></li>
+ <li><a href="#index-is_005flinear-610"><code>is_linear</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-is_005flittle_005fendian-155"><code>is_little_endian</code></a>: <a href="#Endianness">Endianness</a></li>
+ <li><a href="#index-is_005fon_005ffree_005fstore-798"><code>is_on_free_store</code></a>: <a href="#Querying-Solids">Querying Solids</a></li>
+ <li><a href="#index-is_005fon_005ffree_005fstore-608"><code>is_on_free_store</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-is_005fon_005ffree_005fstore-401"><code>is_on_free_store</code></a>: <a href="#Querying-Points">Querying Points</a></li>
+ <li><a href="#index-is_005fon_005ffree_005fstore-251"><code>is_on_free_store</code></a>: <a href="#Querying-Shapes">Querying Shapes</a></li>
+ <li><a href="#index-is_005fon_005ffree_005fstore-189"><code>is_on_free_store</code></a>: <a href="#Querying-Colors">Querying Colors</a></li>
+ <li><a href="#index-is_005fon_005fline-437"><code>is_on_line</code></a>: <a href="#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="#index-is_005fon_005fplane-402"><code>is_on_plane</code></a>: <a href="#Querying-Points">Querying Points</a></li>
+ <li><a href="#index-is_005fon_005fsegment-435"><code>is_on_segment</code></a>: <a href="#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="#index-is_005fplanar-609"><code>is_planar</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-is_005fquadratic-735"><code>is_quadratic</code></a>: <a href="#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="#index-is_005fquadratic-695"><code>is_quadratic</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-is_005fquartic-737"><code>is_quartic</code></a>: <a href="#Querying-Ellipses">Querying Ellipses</a></li>
+ <li><a href="#index-is_005fquartic-697"><code>is_quartic</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-is_005frectangular-687"><code>is_rectangular</code></a>: <a href="#Querying-Rectangles">Querying Rectangles</a></li>
+ <li><a href="#index-kill_005flabels-322"><code>kill_labels</code></a>: <a href="#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="#index-label-723"><code>label</code></a>: <a href="#Labeling-Ellipses">Labeling Ellipses</a></li>
+ <li><a href="#index-label-602"><code>label</code></a>: <a href="#Labelling-Paths">Labelling Paths</a></li>
+ <li><a href="#index-label-457"><code>label</code></a>: <a href="#Labelling-Points">Labelling Points</a></li>
+ <li><a href="#index-Line-503"><code>Line</code></a>: <a href="#Line-Constructors">Line Constructors</a></li>
+ <li><a href="#index-location-748"><code>location</code></a>: <a href="#Returning-Elements-and-Information-for-Ellipses">Returning Elements and Information for Ellipses</a></li>
+ <li><a href="#index-location-700"><code>location</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-magnitude-429"><code>magnitude</code></a>: <a href="#Vector-Operations">Vector Operations</a></li>
+ <li><a href="#index-mediate-438"><code>mediate</code></a>: <a href="#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="#index-mid_005fpoint-684"><code>mid_point</code></a>: <a href="#Returning-Points-for-Rectangles">Returning Points for Rectangles</a></li>
+ <li><a href="#index-modify-184"><code>modify</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-operator_0021_003d-518"><code>operator!=</code></a>: <a href="#Planes-Operators">Planes Operators</a></li>
+ <li><a href="#index-operator_0021_003d-397"><code>operator!=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_0021_003d-180"><code>operator!=</code></a>: <a href="#Color-Operators">Color Operators</a></li>
+ <li><a href="#index-operator_0026-558"><code>operator&amp;</code></a>: <a href="#Path-Operators">Path Operators</a></li>
+ <li><a href="#index-operator_0026_003d-557"><code>operator&amp;=</code></a>: <a href="#Path-Operators">Path Operators</a></li>
+ <li><a href="#index-operator_002a-390"><code>operator*</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002a-272"><code>operator*</code></a>: <a href="#Transform-Operators">Transform Operators</a></li>
+ <li><a href="#index-operator_002a_003d-795"><code>operator*=</code></a>: <a href="#Solid-Operators">Solid Operators</a></li>
+ <li><a href="#index-operator_002a_003d-722"><code>operator*=</code></a>: <a href="#Ellipse-Operators">Ellipse Operators</a></li>
+ <li><a href="#index-operator_002a_003d-638"><code>operator*=</code></a>: <a href="#Polygon-Operators">Polygon Operators</a></li>
+ <li><a href="#index-operator_002a_003d-554"><code>operator*=</code></a>: <a href="#Path-Operators">Path Operators</a></li>
+ <li><a href="#index-operator_002a_003d-384"><code>operator*=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002a_003d-313"><code>operator*=</code></a>: <a href="#Picture-Operators">Picture Operators</a></li>
+ <li><a href="#index-operator_002a_003d-271"><code>operator*=</code></a>: <a href="#Transform-Operators">Transform Operators</a></li>
+ <li><a href="#index-operator_002a_003d-241"><code>operator*=</code></a>: <a href="#Shape-Operators">Shape Operators</a></li>
+ <li><a href="#index-operator_002b-556"><code>operator+</code></a>: <a href="#Path-Operators">Path Operators</a></li>
+ <li><a href="#index-operator_002b-385"><code>operator+</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002b_003d-555"><code>operator+=</code></a>: <a href="#Path-Operators">Path Operators</a></li>
+ <li><a href="#index-operator_002b_003d-386"><code>operator+=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002b_003d-310"><code>operator+=</code></a>: <a href="#Picture-Operators">Picture Operators</a></li>
+ <li><a href="#index-operator_002d-387"><code>operator-</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002d_003d-388"><code>operator-=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002f-394"><code>operator/</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_002f_003d-393"><code>operator/=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_003c_003c-463"><code>operator&lt;&lt;</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-operator_003c_003c-181"><code>operator&lt;&lt;</code></a>: <a href="#Color-Operators">Color Operators</a></li>
+ <li><a href="#index-operator_003d-850"><code>operator=</code></a>: <a href="#Cuboid-Operators">Cuboid Operators</a></li>
+ <li><a href="#index-operator_003d-794"><code>operator=</code></a>: <a href="#Solid-Operators">Solid Operators</a></li>
+ <li><a href="#index-operator_003d-766"><code>operator=</code></a>: <a href="#Circle-Operators">Circle Operators</a></li>
+ <li><a href="#index-operator_003d-721"><code>operator=</code></a>: <a href="#Ellipse-Operators">Ellipse Operators</a></li>
+ <li><a href="#index-operator_003d-682"><code>operator=</code></a>: <a href="#Rectangle-Operators">Rectangle Operators</a></li>
+ <li><a href="#index-operator_003d-663"><code>operator=</code></a>: <a href="#Regular-Polygon-Operators">Regular Polygon Operators</a></li>
+ <li><a href="#index-operator_003d-516"><code>operator=</code></a>: <a href="#Planes-Operators">Planes Operators</a></li>
+ <li><a href="#index-operator_003d-505"><code>operator=</code></a>: <a href="#Line-Operators">Line Operators</a></li>
+ <li><a href="#index-operator_003d-488"><code>operator=</code></a>: <a href="#Focus-Operators">Focus Operators</a></li>
+ <li><a href="#index-operator_003d-383"><code>operator=</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_003d-309"><code>operator=</code></a>: <a href="#Picture-Operators">Picture Operators</a></li>
+ <li><a href="#index-operator_003d-270"><code>operator=</code></a>: <a href="#Transform-Operators">Transform Operators</a></li>
+ <li><a href="#index-operator_003d-178"><code>operator=</code></a>: <a href="#Color-Operators">Color Operators</a></li>
+ <li><a href="#index-operator_003d-_0028for-Points_0029-31"><code>operator= (for Points)</code></a>: <a href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="#index-operator_003d_003d-517"><code>operator==</code></a>: <a href="#Planes-Operators">Planes Operators</a></li>
+ <li><a href="#index-operator_003d_003d-395"><code>operator==</code></a>: <a href="#Point-Operators">Point Operators</a></li>
+ <li><a href="#index-operator_003d_003d-179"><code>operator==</code></a>: <a href="#Color-Operators">Color Operators</a></li>
+ <li><a href="#index-out_005fcircle-668"><code>out_circle</code></a>: <a href="#Circles-for-Regular-Polygons">Circles for Regular Polygons</a></li>
+ <li><a href="#index-out_005fellipse-688"><code>out_ellipse</code></a>: <a href="#Ellipses-for-Rectangles">Ellipses for Rectangles</a></li>
+ <li><a href="#index-out_005frectangle-755"><code>out_rectangle</code></a>: <a href="#Rectangles-for-Ellipses">Rectangles for Ellipses</a></li>
+ <li><a href="#index-output-819"><code>output</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-output-634"><code>output</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-output-464"><code>output</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-output-335"><code>output</code></a>: <a href="#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="#index-output-300"><code>output</code></a>: <a href="#Outputting-Labels">Outputting Labels</a></li>
+ <li><a href="#index-output-253"><code>output</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-Path-543"><code>Path</code></a>: <a href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="#index-persp_005f0-889"><code>persp_0</code></a>: <a href="#Perspective-Functions">Perspective Functions</a></li>
+ <li><a href="#index-Picture-307"><code>Picture</code></a>: <a href="#Picture-Constructors">Picture Constructors</a></li>
+ <li><a href="#index-Plane-513"><code>Plane</code></a>: <a href="#Planes-Constructors">Planes Constructors</a></li>
+ <li><a href="#index-Point-375"><code>Point</code></a>: <a href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="#index-Point_003a_003aintersection_005fpoints-96"><code>Point::intersection_points</code></a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-Point_003a_003aoperator_003d-30"><code>Point::operator=</code></a>: <a href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="#index-Point_003a_003aset-32"><code>Point::set</code></a>: <a href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="#index-project-625"><code>project</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-project-425"><code>project</code></a>: <a href="#Projecting-Points">Projecting Points</a></li>
+ <li><a href="#index-quarter-706"><code>quarter</code></a>: <a href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="#index-real_005ftriple-134"><code>real_triple</code></a>: <a href="#Typedefs-and-Utility-Structures">Typedefs and Utility Structures</a></li>
+ <li><a href="#index-Rectangle-675"><code>Rectangle</code></a>: <a href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="#index-Reg_005fPolygon-658"><code>Reg_Polygon</code></a>: <a href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="#index-reset-291"><code>reset</code></a>: <a href="#Resetting-Transforms">Resetting Transforms</a></li>
+ <li><a href="#index-reset_005fangle-489"><code>reset_angle</code></a>: <a href="#Modifying-Focuses">Modifying Focuses</a></li>
+ <li><a href="#index-reset_005ftransform-414"><code>reset_transform</code></a>: <a href="#Modifying-Points">Modifying Points</a></li>
+ <li><a href="#index-reset_005ftransform-320"><code>reset_transform</code></a>: <a href="#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="#index-reverse-623"><code>reverse</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-rotate-816"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="#index-rotate-725"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="#index-rotate-641"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="#index-rotate-572"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="#index-rotate-415"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="#index-rotate-317"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="#index-rotate-287"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="#index-rotate-244"><code>rotate</code></a>: <a href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="#index-scale-812"><code>scale</code></a>: <a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="#index-scale-728"><code>scale</code></a>: <a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="#index-scale-644"><code>scale</code></a>: <a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="#index-scale-573"><code>scale</code></a>: <a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="#index-scale-418"><code>scale</code></a>: <a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="#index-scale-314"><code>scale</code></a>: <a href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="#index-scale-282"><code>scale</code></a>: <a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="#index-scale-245"><code>scale</code></a>: <a href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="#index-segment-704"><code>segment</code></a>: <a href="#Regular-Closed-Plane-Curve-Segments">Regular Closed Plane Curve Segments</a></li>
+ <li><a href="#index-set-861"><code>set</code></a>: <a href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-763"><code>set</code></a>: <a href="#Circle-Constructors-and-Setting-Functions">Circle Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-717"><code>set</code></a>: <a href="#Ellipse-Constructors-and-Setting-Functions">Ellipse Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-677"><code>set</code></a>: <a href="#Rectangle-Constructors-and-Setting-Functions">Rectangle Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-660"><code>set</code></a>: <a href="#Regular-Polygon-Constructors-and-Setting-Functions">Regular Polygon Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-545"><code>set</code></a>: <a href="#Path-Constructors-and-Setting-Functions">Path Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-485"><code>set</code></a>: <a href="#Focus-Constructors-and-Setting-Functions">Focus Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-377"><code>set</code></a>: <a href="#Point-Constructors-and-Setting-Functions">Point Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-173"><code>set</code></a>: <a href="#Color-Constructors-and-Setting-Functions">Color Constructors and Setting Functions</a></li>
+ <li><a href="#index-set-_0028for-Points_0029-33"><code>set (for Points)</code></a>: <a href="#Setting-and-Assigning-to-Points">Setting and Assigning to Points</a></li>
+ <li><a href="#index-set_005fblue_005fpart-187"><code>set_blue_part</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-set_005fconnectors-571"><code>set_connectors</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005fcycle-622"><code>set_cycle</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-set_005fdash_005fpattern-569"><code>set_dash_pattern</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005fdraw_005fcolor-565"><code>set_draw_color</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005felement-277"><code>set_element</code></a>: <a href="#Setting-Values-Transforms">Setting Values Transforms</a></li>
+ <li><a href="#index-set_005fextremes-823"><code>set_extremes</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-set_005fextremes-627"><code>set_extremes</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-set_005fextremes-468"><code>set_extremes</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-set_005fextremes-255"><code>set_extremes</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-set_005ffill_005fcolor-567"><code>set_fill_color</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005ffill_005fdraw_005fvalue-564"><code>set_fill_draw_value</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005fgreen_005fpart-186"><code>set_green_part</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-set_005fname-182"><code>set_name</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-set_005fon_005ffree_005fstore-797"><code>set_on_free_store</code></a>: <a href="#Setting-Solid-Members">Setting Solid Members</a></li>
+ <li><a href="#index-set_005fon_005ffree_005fstore-563"><code>set_on_free_store</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005fon_005ffree_005fstore-411"><code>set_on_free_store</code></a>: <a href="#Modifying-Points">Modifying Points</a></li>
+ <li><a href="#index-set_005fon_005ffree_005fstore-243"><code>set_on_free_store</code></a>: <a href="#Modifying-Shapes">Modifying Shapes</a></li>
+ <li><a href="#index-set_005fpen-570"><code>set_pen</code></a>: <a href="#Modifying-Paths">Modifying Paths</a></li>
+ <li><a href="#index-set_005fred_005fpart-185"><code>set_red_part</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-set_005ftransform-321"><code>set_transform</code></a>: <a href="#Modifying-Pictures">Modifying Pictures</a></li>
+ <li><a href="#index-set_005fuse_005fname-183"><code>set_use_name</code></a>: <a href="#Modifying-Colors">Modifying Colors</a></li>
+ <li><a href="#index-shear-813"><code>shear</code></a>: <a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="#index-shear-729"><code>shear</code></a>: <a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="#index-shear-645"><code>shear</code></a>: <a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="#index-shear-574"><code>shear</code></a>: <a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="#index-shear-419"><code>shear</code></a>: <a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="#index-shear-283"><code>shear</code></a>: <a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="#index-shear-246"><code>shear</code></a>: <a href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="#index-shift-814"><code>shift</code></a>: <a href="#Affine-Transformations-for-Solids">Affine Transformations for Solids</a></li>
+ <li><a href="#index-shift-730"><code>shift</code></a>: <a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="#index-shift-646"><code>shift</code></a>: <a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="#index-shift-575"><code>shift</code></a>: <a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="#index-shift-420"><code>shift</code></a>: <a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="#index-shift-315"><code>shift</code></a>: <a href="#Affine-Transformations-for-Pictures">Affine Transformations for Pictures</a></li>
+ <li><a href="#index-shift-284"><code>shift</code></a>: <a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="#index-shift-247"><code>shift</code></a>: <a href="#Affine-Transformations-for-Shapes">Affine Transformations for Shapes</a></li>
+ <li><a href="#index-shift_005ftimes-732"><code>shift_times</code></a>: <a href="#Affine-Transformations-for-Ellipses">Affine Transformations for Ellipses</a></li>
+ <li><a href="#index-shift_005ftimes-648"><code>shift_times</code></a>: <a href="#Affine-Transformations-for-Polygons">Affine Transformations for Polygons</a></li>
+ <li><a href="#index-shift_005ftimes-577"><code>shift_times</code></a>: <a href="#Affine-Transformations-for-Paths">Affine Transformations for Paths</a></li>
+ <li><a href="#index-shift_005ftimes-422"><code>shift_times</code></a>: <a href="#Affine-Transformations-for-Points">Affine Transformations for Points</a></li>
+ <li><a href="#index-shift_005ftimes-286"><code>shift_times</code></a>: <a href="#Affine-Transformations-for-Transforms">Affine Transformations for Transforms</a></li>
+ <li><a href="#index-show-811"><code>show</code></a>: <a href="#Showing-Solids">Showing Solids</a></li>
+ <li><a href="#index-show-606"><code>show</code></a>: <a href="#Showing-Paths">Showing Paths</a></li>
+ <li><a href="#index-show-524"><code>show</code></a>: <a href="#Planes-Showing">Planes Showing</a></li>
+ <li><a href="#index-show-507"><code>show</code></a>: <a href="#Showing">Showing</a></li>
+ <li><a href="#index-show-498"><code>show</code></a>: <a href="#Showing-Focuses">Showing Focuses</a></li>
+ <li><a href="#index-show-461"><code>show</code></a>: <a href="#Showing-Points">Showing Points</a></li>
+ <li><a href="#index-show-323"><code>show</code></a>: <a href="#Showing-Pictures">Showing Pictures</a></li>
+ <li><a href="#index-show-281"><code>show</code></a>: <a href="#Showing-Transforms">Showing Transforms</a></li>
+ <li><a href="#index-show-252"><code>show</code></a>: <a href="#Showing-Shapes">Showing Shapes</a></li>
+ <li><a href="#index-show-188"><code>show</code></a>: <a href="#Showing-Colors">Showing Colors</a></li>
+ <li><a href="#index-show_005fcolors-607"><code>show_colors</code></a>: <a href="#Showing-Paths">Showing Paths</a></li>
+ <li><a href="#index-show_005ftransform-462"><code>show_transform</code></a>: <a href="#Showing-Points">Showing Points</a></li>
+ <li><a href="#index-show_005ftransform-324"><code>show_transform</code></a>: <a href="#Showing-Pictures">Showing Pictures</a></li>
+ <li><a href="#index-size-612"><code>size</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-slope-614"><code>slope</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-slope-434"><code>slope</code></a>: <a href="#Points-and-Lines">Points and Lines</a></li>
+ <li><a href="#index-Solid-789"><code>Solid</code></a>: <a href="#Solid-Constructors-and-Setting-Functions">Solid Constructors and Setting Functions</a></li>
+ <li><a href="#index-solve-753"><code>solve</code></a>: <a href="#Solving-Ellipses">Solving Ellipses</a></li>
+ <li><a href="#index-solve-699"><code>solve</code></a>: <a href="#Querying-Regular-Closed-Plane-Curves">Querying Regular Closed Plane Curves</a></li>
+ <li><a href="#index-solve_005fquadratic-888"><code>solve_quadratic</code></a>: <a href="#Utility-Functions">Utility Functions</a></li>
+ <li><a href="#index-subpath-615"><code>subpath</code></a>: <a href="#Querying-Paths">Querying Paths</a></li>
+ <li><a href="#index-suppress_005flabels-337"><code>suppress_labels</code></a>: <a href="#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="#index-suppress_005foutput-820"><code>suppress_output</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-suppress_005foutput-632"><code>suppress_output</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-suppress_005foutput-465"><code>suppress_output</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-suppress_005foutput-260"><code>suppress_output</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-Tetrahedron-859"><code>Tetrahedron</code></a>: <a href="#Tetrahedron-Constructors-and-Setting-Functions">Tetrahedron Constructors and Setting Functions</a></li>
+ <li><a href="#index-Transform-267"><code>Transform</code></a>: <a href="#Transform-Constructors">Transform Constructors</a></li>
+ <li><a href="#index-trunc-886"><code>trunc</code></a>: <a href="#Utility-Functions">Utility Functions</a></li>
+ <li><a href="#index-Trunc_005fOctahedron-883"><code>Trunc_Octahedron</code></a>: <a href="#Truncated-Octahedron-Constructors-and-Setting-Functions">Truncated Octahedron Constructors and Setting Functions</a></li>
+ <li><a href="#index-undraw-831"><code>undraw</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-undraw-597"><code>undraw</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-undraw-450"><code>undraw</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-undrawdot-446"><code>undrawdot</code></a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-unfill-832"><code>unfill</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-unfill-599"><code>unfill</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-unfilldraw-833"><code>unfilldraw</code></a>: <a href="#Drawing-and-Filling-Solids">Drawing and Filling Solids</a></li>
+ <li><a href="#index-unfilldraw-600"><code>unfilldraw</code></a>: <a href="#Drawing-and-Filling-Paths">Drawing and Filling Paths</a></li>
+ <li><a href="#index-unit_005fvector-431"><code>unit_vector</code></a>: <a href="#Vector-Operations">Vector Operations</a></li>
+ <li><a href="#index-unsuppress_005flabels-338"><code>unsuppress_labels</code></a>: <a href="#Picture-Output-Functions">Picture Output Functions</a></li>
+ <li><a href="#index-unsuppress_005foutput-821"><code>unsuppress_output</code></a>: <a href="#Outputting-Solids">Outputting Solids</a></li>
+ <li><a href="#index-unsuppress_005foutput-633"><code>unsuppress_output</code></a>: <a href="#Outputting-Paths">Outputting Paths</a></li>
+ <li><a href="#index-unsuppress_005foutput-261"><code>unsuppress_output</code></a>: <a href="#Outputting-Shapes">Outputting Shapes</a></li>
+ <li><a href="#index-void-466"><code>void</code></a>: <a href="#Outputting-Points">Outputting Points</a></li>
+ <li><a href="#index-write_005ffooters-227"><code>write_footers</code></a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-g_t_007eCuboid-849"><code>~Cuboid</code></a>: <a href="#Cuboid-Constructors-and-Setting-Functions">Cuboid Constructors and Setting Functions</a></li>
+ <li><a href="#index-g_t_007ePath-553"><code>~Path</code></a>: <a href="#Path-Destructor">Path Destructor</a></li>
+ <li><a href="#index-g_t_007ePoint-382"><code>~Point</code></a>: <a href="#Point-Destructor">Point Destructor</a></li>
+ <li><a href="#index-g_t_007eSolid-793"><code>~Solid</code></a>: <a href="#Solid-Destructor">Solid Destructor</a></li>
+    </ul><!-- concidx.texi -->
+ <!-- This file is part of the 3DLDF User and Reference Manual. -->
+ <!-- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The Free Software Foundation -->
+ <!-- See the section "GNU Free Documentation License" in the file -->
+ <!-- fdl.texi for copying conditions. -->
+ <div class="node">
+ <a name="Concept-Index"></a>
+ <p><hr>
+ Previous:&nbsp;<a rel="previous" accesskey="p" href="#Function-Index">Function Index</a>,
+ Up:&nbsp;<a rel="up" accesskey="u" href="#Top">Top</a>
+ 
+ </div>
+ 
+ <h2 class="unnumbered">Concept Index</h2>
+ 
+ 
+ 
+ <ul class="index-cp" compact>
+ <li><a href="#index-animation-76">animation</a>: <a href="#Focuses-Getstart">Focuses Getstart</a></li>
+ <li><a href="#index-arbitrary-Path-85">arbitrary Path</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-B_002dsplines-896">B-splines</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-B_0040_0027ezier-curves-895">B&eacute;zier curves</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-bugs-34">bugs</a>: <a href="#Rotating-Points">Rotating Points</a></li>
+ <li><a href="#index-CD_002dR-_0028Compact-Disk_002c-Recordable_0029-118">CD-R (Compact Disk, Recordable)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-Compact-Disk_002c-Recordable-_0028CD_002dR_0029-119">Compact Disk, Recordable (CD-R)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-Comprehensive-_0040TeX_007b_007d-Archive-Network-_0028CTAN_0029-2">Comprehensive TeX Archive Network (CTAN)</a>: <a href="#Sources-of-Information">Sources of Information</a></li>
+ <li><a href="#index-connecting-_0040code_007bPoints_007d-48">connecting <code>Points</code></a>: <a href="#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="#index-connectors-90">connectors</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-connectors-52">connectors</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-contributing-to-3DLDF-100">contributing to 3DLDF</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-control-points-56">control points</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-controls-55">controls</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-convert-_0028ImageMagick_0029-106">convert (ImageMagick)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-CTAN-_0028Comprehensive-_0040TeX_007b_007d-Archive-Network_0029-1">CTAN (Comprehensive TeX Archive Network)</a>: <a href="#Sources-of-Information">Sources of Information</a></li>
+ <li><a href="#index-curl-53">curl</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-derivation-892">derivation</a>: <a href="#Geometry">Geometry</a></li>
+ <li><a href="#index-derived-classes-891">derived classes</a>: <a href="#Geometry">Geometry</a></li>
+ <li><a href="#index-display-_0028ImageMagick_0029-117">display (ImageMagick)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-drawing-and-filling-44">drawing and filling</a>: <a href="#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="#index-Emacs-229">Emacs</a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-Emacs_002dLisp-128">Emacs-Lisp</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-Encapsulated-PostScript-_0028EPS_0029-127">Encapsulated PostScript (EPS)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-Encapsulated-PostScript-_0028EPS_0029-114">Encapsulated PostScript (EPS)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-Encapsulated-PostScript-_0028EPS_0029-15">Encapsulated PostScript (EPS)</a>: <a href="#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="#index-Encapsulated-PostScript-_0028EPS_0029-11">Encapsulated PostScript (EPS)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-EPS-_0028Encapsulated-PostScript_0029-126">EPS (Encapsulated PostScript)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-EPS-_0028Encapsulated-PostScript_0029-113">EPS (Encapsulated PostScript)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-EPS-_0028Encapsulated-PostScript_0029-14">EPS (Encapsulated PostScript)</a>: <a href="#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="#index-EPS-_0028Encapsulated-PostScript_0029-10">EPS (Encapsulated PostScript)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-file_002c-output-442">file, output</a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-function-templates-103">function templates</a>: <a href="#Template-Functions">Template Functions</a></li>
+ <li><a href="#index-function_002c-member-4">function, member</a>: <a href="#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="#index-future-plans-99">future plans</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-help-lines-452">help lines</a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-hidden-surface-algorithm-79">hidden surface algorithm</a>: <a href="#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="#index-homogeneous-coordinates-36">homogeneous coordinates</a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-identity-matrix-38">identity matrix</a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-ImageMagick-104">ImageMagick</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-ImageMagick-convert-105">ImageMagick convert</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-ImageMagick-display-116">ImageMagick display</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-input-routine-21">input routine</a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-intersection-81">intersection</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-intersection-points-82">intersection points</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-intersection-theory-97">intersection theory</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-invariance_002c-projective-902">invariance, projective</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-inversion-43">inversion</a>: <a href="#Inverting-Transforms">Inverting Transforms</a></li>
+ <li><a href="#index-kludge-887">kludge</a>: <a href="#Utility-Functions">Utility Functions</a></li>
+ <li><a href="#index-linear-_0040code_007bPaths_007d-527">linear <code>Paths</code></a>: <a href="#Path-Data-Members">Path Data Members</a></li>
+ <li><a href="#index-lines_002c-drawing-47">lines, drawing</a>: <a href="#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="#index-local-variable-lists-228">local variable lists</a>: <a href="#I_002fO-Functions">I/O Functions</a></li>
+ <li><a href="#index-matrix-inversion-42">matrix inversion</a>: <a href="#Inverting-Transforms">Inverting Transforms</a></li>
+ <li><a href="#index-matrix-operations-40">matrix operations</a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-matrix_002c-identity-39">matrix, identity</a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-measurement-units-19">measurement units</a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+ <li><a href="#index-member-function-3">member function</a>: <a href="#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="#index-Metafont-12">Metafont</a>: <a href="#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="#index-MetaPost-13">MetaPost</a>: <a href="#Metafont-and-MetaPost">Metafont and MetaPost</a></li>
+ <li><a href="#index-multi_002dthreading-910">multi-threading</a>: <a href="#Multi_002dThreading">Multi-Threading</a></li>
+ <li><a href="#index-multiple-inheritance-890">multiple inheritance</a>: <a href="#Geometry">Geometry</a></li>
+ <li><a href="#index-non_002darbitrary-Path-92">non-arbitrary Path</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-non_002duniform-rational-B_002dsplines-_0028NURBS_0029-898">non-uniform rational B-splines (NURBS)</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-NURBS-_0028non_002duniform-rational-B_002dsplines_0029-897">NURBS (non-uniform rational B-splines)</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-operations_002c-matrix-41">operations, matrix</a>: <a href="#Transforms">Transforms</a></li>
+ <li><a href="#index-output-file-441">output file</a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-output-file-84">output file</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-output-file-69">output file</a>: <a href="#Pictures">Pictures</a></li>
+ <li><a href="#index-output-files-72">output files</a>: <a href="#Pictures">Pictures</a></li>
+ <li><a href="#index-painter_0027s-algorithm-80">painter's algorithm</a>: <a href="#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="#index-patches-899">patches</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-Path-connectors-91">Path connectors</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-Path-intersections-83">Path intersections</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-paths-51">paths</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-pen-expression-443">pen expression</a>: <a href="#Point-Drawing-Functions">Point Drawing Functions</a></li>
+ <li><a href="#index-pens-45">pens</a>: <a href="#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="#index-PNG-_0028Portable-Network-Graphics_0029-911">PNG (Portable Network Graphics)</a>: <a href="#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a></li>
+ <li><a href="#index-PNG-_0028Portable-Network-Graphics_0029-120">PNG (Portable Network Graphics)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-PNG-_0028Portable-Network-Graphics_0029-107">PNG (Portable Network Graphics)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-PNG-_0028Portable-Network-Graphics_0029-6">PNG (Portable Network Graphics)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-g_t_0040code_007bPoints_007d_002c-connecting-49"><code>Points</code>, connecting</a>: <a href="#Drawing-Points-Intro">Drawing Points Intro</a></li>
+ <li><a href="#index-Portable-Network-Graphics-_0028PNG_0029-912">Portable Network Graphics (PNG)</a>: <a href="#Changes-in-3DLDF-1_002e1_002e5_002e1">Changes in 3DLDF 1.1.5.1</a></li>
+ <li><a href="#index-Portable-Network-Graphics-_0028PNG_0029-121">Portable Network Graphics (PNG)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-Portable-Network-Graphics-_0028PNG_0029-108">Portable Network Graphics (PNG)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-Portable-Network-Graphics-_0028PNG_0029-7">Portable Network Graphics (PNG)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-PostScript-_0028PS_0029-123">PostScript (PS)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-PostScript-_0028PS_0029-110">PostScript (PS)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-PostScript-_0028PS_0029-9">PostScript (PS)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-PostScript_002c-structured-125">PostScript, structured</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-PostScript_002c-structured-112">PostScript, structured</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-projective-invariance-901">projective invariance</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-PS-_0028PostScript_0029-122">PS (PostScript)</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-PS-_0028PostScript_0029-109">PS (PostScript)</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-PS-_0028PostScript_0029-8">PS (PostScript)</a>: <a href="#Illustrations">Illustrations</a></li>
+ <li><a href="#index-raw-MetaPost-code-73">raw MetaPost code</a>: <a href="#Pictures">Pictures</a></li>
+ <li><a href="#index-reflections-908">reflections</a>: <a href="#Shadows">Shadows</a></li>
+ <li><a href="#index-RGB-_0028red_002dgreen_002dblue_0029-165">RGB (red-green-blue)</a>: <a href="#Color-Data-Members">Color Data Members</a></li>
+ <li><a href="#index-shading-909">shading</a>: <a href="#Shadows">Shadows</a></li>
+ <li><a href="#index-shadows-907">shadows</a>: <a href="#Shadows">Shadows</a></li>
+ <li><a href="#index-spline-curves-894">spline curves</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-splines-893">splines</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-structured-PostScript-124">structured PostScript</a>: <a href="#Converting-EPS-Files-ELISP">Converting EPS Files ELISP</a></li>
+ <li><a href="#index-structured-PostScript-111">structured PostScript</a>: <a href="#Converting-EPS-Files">Converting EPS Files</a></li>
+ <li><a href="#index-surface-hiding-78">surface hiding</a>: <a href="#Surface-Hiding">Surface Hiding</a></li>
+ <li><a href="#index-surface-patches-900">surface patches</a>: <a href="#Curves-and-Surfaces">Curves and Surfaces</a></li>
+ <li><a href="#index-symbols-5">symbols</a>: <a href="#Manual-Conventions">Manual Conventions</a></li>
+ <li><a href="#index-system-dependencies-148">system dependencies</a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-template-functions-102">template functions</a>: <a href="#Template-Functions">Template Functions</a></li>
+ <li><a href="#index-templates-101">templates</a>: <a href="#Template-Functions">Template Functions</a></li>
+ <li><a href="#index-tension-54">tension</a>: <a href="#Paths">Paths</a></li>
+ <li><a href="#index-theory-of-intersection-98">theory of intersection</a>: <a href="#Intersections">Intersections</a></li>
+ <li><a href="#index-TO-DO-150">TO DO</a>: <a href="#Global-Constants-and-Variables">Global Constants and Variables</a></li>
+ <li><a href="#index-TO-DO-74">TO DO</a>: <a href="#Projections">Projections</a></li>
+ <li><a href="#index-units-of-measurement-20">units of measurement</a>: <a href="#Declaring-and-Initializing-Points">Declaring and Initializing Points</a></li>
+    </ul><div class="footnote">
+ <hr>
+ <a name="texinfo-footnotes-in-document"></a><h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> <samp><span class="command">ctangle</span></samp> creates
+ <samp><span class="file">&lt;</span><i>filename</i><span class="file">&gt;.c</span></samp> from
+ <samp><i>&lt;filename&gt;</i><span class="file">.web</span></samp>,
+ so the compiler must compile the C++
+  files
+ using the <samp><span class="option">-x c++</span></samp> option.  Otherwise, it would handle them as if
+ they contained C code.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-2" href="#fnd-2">2</a>]</small> If you want to try generating the illustrations yourself, you
+ can save a little run-time by calling <samp><span class="command">tex 3DLDF.texi</span></samp> the
+ first time, rather than <samp><span class="command">texi2dvi</span></samp>.  The latter program runs
+ TeX twice, because it needs two passes in order to generate the
+ contents, indexing, and cross reference information (and maybe some
+ other things, too).</p>
+ 
+    <p class="footnote"><small>[<a name="fn-3" href="#fnd-3">3</a>]</small> Knuth, Donald E. <em>The
+ TeXbook</em>. Computers and Typesetting; A. 
+ Addison-Wesley Publishing Company. Reading, Massachusetts 1986.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-4" href="#fnd-4">4</a>]</small> Rokicki, Tomas. <em>Dvips: A
+ DVI-to-PostScript Translator</em> February 1997.  Available from CTAN. 
+ See <a href="#Sources-of-Information">Sources of Information</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-5" href="#fnd-5">5</a>]</small> &ldquo;&lt;<small class="dots">...</small>&gt;
+ METAFONT deals only with numbers in a limited
+ range:  A numeric token must be less than 4096, and its value is always
+ rounded to the nearest  multiple of
+ 1 / 65536.&rdquo;  Knuth, The METAFONTbook, p. 50. 
+ </p>
+ 
+    <p class="footnote"><small>[<a name="fn-6" href="#fnd-6">6</a>]</small> <dfn>Scan conversion</dfn> is the process of digitizing geometric
+ data.  The ultimate result is a
+ 2 X 2
+ map of pixels, which can be used for printing or representing the projection on a
+ computer screen.  The number of pixels per a given unit of measurement
+ is the <dfn>resolution</dfn> of a given output device, e.g., 300 pixels per inch.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-7" href="#fnd-7">7</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 14, p. 127.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-8" href="#fnd-8">8</a>]</small> Flex is a program for generating text scanners and Bison is a
+ parser generator.  They are available from
+ <a href="http://www.gnu.org">http://www.gnu.org</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-9" href="#fnd-9">9</a>]</small> <dfn>Affine transformations</dfn> are operations
+ that have the property that parallelity of
+ lines is maintained.  That is, if two lines (each determined by two
+ points) are parallel before the transformation, they will also be
+ parallel after
+ the transformation.  Affine transformations are discussed in many books
+ about computer graphics and geometry.  For 3DLDF, I've mostly used
+ Jones, <cite>Computer Graphics through Key Mathematics</cite>  and Salomon,
+ <cite>Computer Graphics and Geometric Modeling</cite>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-10" href="#fnd-10">10</a>]</small> I try to avoid the use of
+ preprocessor macros as much as possible, for the reasons given by
+ Stroustrup in the <cite>The C++
+  Programming Language</cite>,
+ section
+ 7.8,
+ pp. 160&ndash;163, and
+ <cite>Design and Evolution of C++
+ </cite>, Chapter 18, pp. 423&ndash;426. 
+ However, conditional compilation is one of
+ the tasks that only the preprocessor can perform.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-11" href="#fnd-11">11</a>]</small> It is unfortunate that
+ the terms &ldquo;array&rdquo;, &ldquo;matrix&rdquo;, and &ldquo;vector&rdquo; have different meanings
+ in C++
+  and in normal mathematical usage. However, in practice, these
+ discrepancies turn out not to cause many problems.  Stroustrup,
+ <cite>The C++
+  Programming Language</cite>, section
+  22.4, p. 662.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-12" href="#fnd-12">12</a>]</small> In fact, none of the operations for
+ transformations require all of the elements of a
+ 4 X 4
+ matrix.  In many
+ 3D graphics programs, the matrix operations are modified to use smaller
+ transformation matrices, which reduces the storage requirements of the
+ program.  This is a bit tricky, because the affine transformations and
+ the perspective transformation use different elements of the matrix.  I
+ consider that the risk of something going wrong, possibly producing
+ hard-to-find bugs, outweighs any benefits from saving memory (which
+ is usually no longer at a premium, anyway).  In addition, there may be
+ some interesting non-affine transformations that would be worth
+ implementing.  Therefore, I've decided to
+ use full
+ 4 X 4
+ matrices in 3DLDF.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-13" href="#fnd-13">13</a>]</small> Pens are a concept from Metafont.  In 3DLDF,
+ there is currently no type &ldquo;<code>Pen</code>&rdquo;.  Pen arguments to functions
+ are simply <code>strings</code>, and are written unaltered to <code>out_stream</code>. 
+ For more information about
+ Metafont's <code>pens</code>, see
+ Knuth, <cite>The Metafontbook</cite>, Chapter 4.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-14" href="#fnd-14">14</a>]</small> <code>Colors</code> are declared in the
+ namespace <code>Colors</code>, so if you have
+ a &ldquo;<code>using</code>&rdquo; declaration in the function where you use
+ <code>drawdot()</code>, you can write &ldquo;<code>black</code>&rdquo; instead of
+ &ldquo;<code>Colors::black</code>&rdquo;.  For more information about namespaces, see
+ Stroustrup,  <cite>The C++
+  Programming Language</cite>, Chapter 8.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-15" href="#fnd-15">15</a>]</small> &ldquo;A <dfn>reference</dfn> is an alternative name for an object.  The
+ main use of references is for specifying arguments and return values for
+ functions in general and for overloaded operators (Chapter 11) in
+ particular.&rdquo;  Stroustrup, <cite>The C++
+  Programming Language</cite>,
+ section
+ 5.5, p. 97.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-16" href="#fnd-16">16</a>]</small> I believe that
+ counter-examples could probably constructed, but for the most common
+ cases, the principle applies.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-17" href="#fnd-17">17</a>]</small> It's easy to forget to use <code>Point*</code> arguments, rather
+ than plain <code>Point</code> arguments, and to forget to end the list of
+ arguments with 0.  If plain <code>Point</code> arguments are used, compilation
+ fails with GCC.  With the DEC compiler, compilation succeeds, but a
+ memory fault error occurs at run-time.  If the argument list doesn't end
+ in 0, neither compiler signals an error, but a memory fault error always
+ occurs at run-time.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-18" href="#fnd-18">18</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 14, p. 127.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-19" href="#fnd-19">19</a>]</small> Namespaces are described in
+ Stroustrup, <cite>The C++
+  Programming Language</cite>, Chapter 8.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-20" href="#fnd-20">20</a>]</small> There are many books on linear perspective for artists. 
+ I've found Gwen White's <cite>Perspective.  A Guide for Artists,
+ Architects and Designers</cite> to be particularly good.  Vredeman de Vries,
+ <cite>Perspective</cite> contains beautiful examples of perspective
+ constructions.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-21" href="#fnd-21">21</a>]</small> (I believe the following to be correct, but I'm not entirely sure.) 
+ Let vector v be the line of sight.  By definition, the plane of
+ projection will be a plane p, such that vector v is normal to
+ p.  Let q_0 and q_1 be planes such that
+ q_0 == q_1 or q_0 || q_1, and  q_0 is
+ perpendicular to p. 
+ It follows that q_1 is perpendicular to p. 
+ Let l_0 and l_1 be lines, such that l_0 != l_1,
+ l_0 || l_1, l_0 lies within q_0, l_1 lies
+ within q_1,
+ l_0 is perpendicular to vector v, and l_1 is perpendicular
+ to vector v. 
+ Under these circumstances, the projections of l_0 and l_1
+ in p will also be parallel. 
+ </p>
+ 
+    <p class="footnote"><small>[<a name="fn-22" href="#fnd-22">22</a>]</small> I believe this
+ to be true, but I'm not
+ certain.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-23" href="#fnd-23">23</a>]</small> The books on computer graphics and the fairly elementary
+ mathematics books that I own or have referred to don't go into
+ intersections very deeply.  One that does is
+ Fischer, Gerd.  <cite>Ebene Algebraische Kurven</cite>, which is a bit over my
+ head.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-24" href="#fnd-24">24</a>]</small> Stallman, Richard M. <cite>Using and Porting the GNU Compiler
+ Collection</cite>, p.&nbsp;<!-- /@w -->285.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-25" href="#fnd-25">25</a>]</small> Hobby, <cite>A User's Manual for MetaPost</cite>, pp.&nbsp;<!-- /@w -->21&ndash;22.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-26" href="#fnd-26">26</a>]</small> Rokicki, <cite>Dvips: A DVI-to-PostScript Translator</cite>, p.&nbsp;<!-- /@w -->24.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-27" href="#fnd-27">27</a>]</small> Knuth, Donald E. <cite>The Metafontbook</cite>, p. 66.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-28" href="#fnd-28">28</a>]</small> If your system supplies an unsigned integer type with the same
+ length as <code>long double</code>, then you can instantiate
+ <code>get_second_largest&lt;long double&gt;()</code> and call
+ &lsquo;<samp><span class="samp">get_second_largest&lt;long double&gt;(LDBL_MAX)</span></samp>&rsquo;.  However, I doubt
+ that this amount of precision would be worthwhile.  If it ever were
+ required, 3DLDF would have to be changed in other ways, too.  In
+ particular, it would have to use more precise trigonometric functions
+ for rotations.  See <a href="#Accuracy">Accuracy</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-29" href="#fnd-29">29</a>]</small> For that matter, I haven't really tested whether 0.00001 is a
+ good value when <code>real</code> is <code>float</code>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-30" href="#fnd-30">30</a>]</small> For a person, not in the sense of the program behaving
+ unpredictably.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-31" href="#fnd-31">31</a>]</small> <code>label()</code> and <code>dotlabel()</code>
+ are currently only defined for <code>Point</code> and <code>Path</code> (and the
+ latter's derived classes), i.e., not for <code>Solid</code> and its derived
+ classes.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-32" href="#fnd-32">32</a>]</small> Actually, it's printed to standard output
+ even if it is the empty string, you just don't see it.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-33" href="#fnd-33">33</a>]</small> It's unlikely that <code>Points</code> will lie on a <code>Plane</code>,
+ unless the user constructs the case specially. 
+ In [next figure]
+ , the coordinates for B and C were found by using
+ <code>Plane::intersection_point()</code>. 
+ See <a href="#Plane-Intersections">Planes; Intersections</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-34" href="#fnd-34">34</a>]</small> For that matter, I haven't really tested whether 0.00001 is a
+ good value when <code>real</code> is <code>float</code>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-35" href="#fnd-35">35</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>, p.&nbsp;<!-- /@w -->96.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-36" href="#fnd-36">36</a>]</small> It isn't sufficient to check whether a
+ <code>Path</code> consists of only two <code>Points</code> to determine whether it
+ is a line or not, since a connector with &ldquo;<code>curl</code>&rdquo; could cause it
+ to be non-linear.  On the other hand, <code>Paths</code> containing only
+ colinear <code>Points</code> and the connector <code>"--"</code> are perfectly
+ legitimate lines.  I'm in the process of changing all of the code that
+ tests for linearity by checking the value of <code>line_switch</code>, so that
+ it uses <code>is_linear()</code> instead.  When I've done this, it may be
+ possible to eliminate <code>line_switch</code>. 
+ See <a href="#Path-Data-Members">Path Reference; Data Members</a>, and
+ <a href="#Querying-Paths">Path Reference; Querying</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-37" href="#fnd-37">37</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>, p.&nbsp;<!-- /@w -->88.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-38" href="#fnd-38">38</a>]</small> Where possible, I prefer to use the C++
+  data
+ type <code>string</code> rather than <code>char*</code>, however it was necessary to
+ use <code>char*</code> here because 0 is not a valid <code>string</code>, even
+ though <code>string</code> may be implemented as <code>char*</code>,
+ and 0 must be a valid argument, since it is needed to indicate the end
+ of the argument list.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-39" href="#fnd-39">39</a>]</small> Hobby, <cite>A User's Manual for MetaPost</cite>, p.&nbsp;<!-- /@w -->32.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-40" href="#fnd-40">40</a>]</small> Knuth, <cite>The METAFONTbook</cite>, Chapter 4, p.&nbsp;<!-- /@w -->21ff. 
+ Hobby, <cite>A User's Manual for MetaPost</cite>, p.&nbsp;<!-- /@w -->32.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-41" href="#fnd-41">41</a>]</small> The usual interpretation of <code>""</code> as a
+ position argument to a
+ labelling command would be to put it directly onto <code>*(Label.pt)</code>,
+ which in this case would put it onto the arrowhead.  Since this
+ will probably never be desirable, I've decided to use <code>""</code> to
+ suppress drawing axes.  Formerly, <code>draw_axes()</code> used three
+ additional arguments for this purpose.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-42" href="#fnd-42">42</a>]</small> The following example shows only one <code>Point</code> per
+ line.  In actual use, two <code>Points</code> are shown, but this causes
+ overfull boxes in Texinfo.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-43" href="#fnd-43">43</a>]</small> <code>Reg_Polygon</code> and <code>Rectangle</code> are currently the only
+ classes derived from <code>Polygon</code>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-44" href="#fnd-44">44</a>]</small> If you don't
+ know what &ldquo;overfull boxes&rdquo; are, don't worry about it.  It has to do with
+ TeX's line and page breaking algorithms.  If you want to know more,
+ see Knuth, Donald E., <cite>The TeXbook</cite>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-45" href="#fnd-45">45</a>]</small> Albrecht D&uuml;rer invented this method of constructing polyhedra. 
+ <!-- !! TO DO:  Find citation! -->
+ </p>
+ 
+    <p class="footnote"><small>[<a name="fn-46" href="#fnd-46">46</a>]</small> The GNU Coding Standards are available at
+ <a href="http://www.gnu.org/prep/standards_toc.html">http://www.gnu.org/prep/standards_toc.html</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-47" href="#fnd-47">47</a>]</small> Automake is available for downloading from
+ <a href="http://ftp.gnu.org/gnu/automake/">http://ftp.gnu.org/gnu/automake/</a>.  The Automake website is at
+ <a href="http://www.gnu.org/software/automake/">http://www.gnu.org/software/automake/</a>.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-48" href="#fnd-48">48</a>]</small> Stroustrup, <cite>The C++
+  Programming Language</cite>,
+ &amp;sect;15.2
+ &ldquo;Multiple Inheritance&rdquo;, pp.&nbsp;<!-- /@w -->390&ndash;92.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-49" href="#fnd-49">49</a>]</small> Cundy and Rollet, <cite>Mathematical Models</cite>, Chapter 3,
+ &ldquo;Polyhedra&rdquo;, pp. 76&ndash;160.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-50" href="#fnd-50">50</a>]</small> Huw Jones,
+ <i>Computer Graphics through Key Mathematics</i>, and
+ David Salomon,
+ <i>Computer Graphics and Geometric Modeling</i>, are my main sources of
+ information about spline curves.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-51" href="#fnd-51">51</a>]</small> Jones, Huw. 
+ <i>Computer Graphics through Key Mathematics</i>, p.&nbsp;<!-- /@w -->282.</p>
+ 
+    <p class="footnote"><small>[<a name="fn-52" href="#fnd-52">52</a>]</small> Knuth, Donald Ervin. 
+ <i>The METAFONTbook</i>, p.&nbsp;<!-- /@w -->130, and
+ Hobby, John D. 
+ <i>Smooth, Easy to Compute Interpolating Splines</i>. 
+ Discrete and Computational Geometery 1(2).</p>
+ 
+    <hr></div>
+ 
+ </body></html>
+ 
diff -rc2P 3DLDF-2.0.2/doc/old_doc/3DLDF.info 3DLDF-2.0.3/doc/old_doc/3DLDF.info
*** 3DLDF-2.0.2/doc/old_doc/3DLDF.info	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/old_doc/3DLDF.info	Wed Nov 13 19:06:13 2013
***************
*** 0 ****
--- 1,374 ----
+ This is 3DLDF.info, produced by makeinfo version 4.13 from 3DLDF.texi.
+ 
+ This is the 3DLDF User and Reference Manual, edition 1.1.5.1 for 3DLDF
+ 1.1.5.1.
+ This manual was last updated on 16 January 2004.
+ 3DLDF is a GNU package for three-dimensional drawing with MetaPost
+ output.  The author is Laurence D. Finston.
+ 
+    Copyright (C) 2003, 2004 , 2005, 2006, 2007, 2008, 2009, 2010, 2011,
+ 2012, 2013 The Free Software Foundation
+ 
+      Permission is granted to copy, distribute and/or modify this
+      document under the terms of the GNU Free Documentation License,
+      Version 1.2 or any later version published by the Free Software
+      Foundation; with no Invariant Sections, no Front-Cover Texts, and
+      no Back-Cover Texts.  A copy of the license is included in the
+      section entitled "GNU Free Documentation License".
+ 
+ INFO-DIR-SECTION GNU packages
+ START-INFO-DIR-ENTRY
+ * 3DLDF: (3DLDF).            3D drawing with MetaPost output.
+ END-INFO-DIR-ENTRY
+ 
+ 
+ Indirect:
+ 3DLDF.info-1: 959
+ 3DLDF.info-2: 300631
+ 3DLDF.info-3: 566065
+ 
+ Tag Table:
+ (Indirect)
+ Node: Top959
+ Node: Introduction10409
+ Node: Sources of Information12848
+ Node: About This Manual14155
+ Node: Manual Conventions16999
+ Node: Illustrations20097
+ Ref: Illustrations-Footnote-125071
+ Ref: Illustrations-Footnote-225267
+ Node: CWEB Documentation25609
+ Node: Metafont and MetaPost28050
+ Ref: Metafont and MetaPost-Footnote-131637
+ Ref: Metafont and MetaPost-Footnote-231771
+ Ref: Metafont and MetaPost-Footnote-331905
+ Node: Caveats32119
+ Node: Accuracy32287
+ Ref: Accuracy-Footnote-134427
+ Ref: Accuracy-Footnote-234755
+ Node: No Input Routine34810
+ Ref: No Input Routine-Footnote-135807
+ Node: Ports35942
+ Node: Contributing to 3DLDF38563
+ Node: Using 3DLDF39180
+ Node: Points39697
+ Node: Declaring and Initializing Points39893
+ Node: Setting and Assigning to Points43954
+ Node: Transforming Points45422
+ Ref: Transforming Points-Footnote-146694
+ Ref: Transforming Points-Footnote-247182
+ Node: Shifting Points47513
+ Node: Scaling Points49015
+ Node: Shearing Points50000
+ Node: Rotating Points51180
+ Node: Transforms53795
+ Ref: Transforms-Footnote-157507
+ Ref: Transforms-Footnote-257794
+ Node: Applying Transforms to Points Intro58543
+ Node: Inverting Transforms60491
+ Node: Drawing and Labeling Points62545
+ Node: Drawing Points Intro62766
+ Ref: Drawing Points Intro-Footnote-165619
+ Ref: Drawing Points Intro-Footnote-265890
+ Ref: Drawing Points Intro-Footnote-366184
+ Node: Labeling Points Intro66468
+ Node: Paths68305
+ Ref: Paths-Footnote-170335
+ Node: Declaring and Initializing Paths70457
+ Ref: Declaring and Initializing Paths-Footnote-173741
+ Ref: Declaring and Initializing Paths-Footnote-274167
+ Node: Drawing and Filling Paths Intro74222
+ Node: Plane Figures78026
+ Node: Regular Polygons Getstart79415
+ Node: Rectangles Getstart81785
+ Node: Ellipses Getstart84426
+ Node: Circles Getstart85777
+ Node: Solid Figures86886
+ Node: Cuboid Getstart87064
+ Node: Polyhedron Getstart88434
+ Node: Tetrahedron Getstart89697
+ Node: Dodecahedron Getstart90223
+ Node: Icosahedron Getstart91005
+ Node: Pictures91667
+ Node: Projections98286
+ Ref: Projections-Footnote-199985
+ Node: Parallel Projections100077
+ Node: The Perspective Projection101833
+ Ref: The Perspective Projection-Footnote-1105966
+ Ref: The Perspective Projection-Footnote-2106234
+ Node: Focuses Getstart106841
+ Ref: Focuses Getstart-Footnote-1112144
+ Node: Surface Hiding112205
+ Node: Intersections120394
+ Ref: Intersections-Footnote-1123540
+ Node: Installing and Running 3DLDF123787
+ Node: Installing 3DLDF124030
+ Node: Template Functions125635
+ Ref: Template Functions-Footnote-1127999
+ Node: Running 3DLDF128085
+ Node: Converting EPS Files133429
+ Ref: Converting EPS Files-Footnote-1136732
+ Ref: Converting EPS Files-Footnote-2136790
+ Node: Converting EPS Files ELISP136855
+ Node: Command Line Arguments139308
+ Node: Typedefs and Utility Structures140258
+ Node: Global Constants and Variables142495
+ Ref: Global Constants and Variables-Footnote-1146934
+ Node: Dynamic Allocation of Shapes146986
+ Node: System Information148797
+ Node: Endianness150292
+ Node: Register Width152470
+ Node: Get Second Largest Real153537
+ Ref: Get Second Largest Real-Footnote-1154922
+ Node: Color Reference155388
+ Node: Color Data Members155792
+ Node: Color Constructors and Setting Functions156853
+ Node: Color Operators159290
+ Node: Modifying Colors160670
+ Node: Showing Colors161672
+ Node: Querying Colors162124
+ Node: Defining and Initializing Colors163256
+ Node: Namespace Colors163873
+ Node: Input and Output165628
+ Node: I/O Global Variables165825
+ Node: I/O Functions166832
+ Node: Shape Reference168035
+ Node: Shape Data Members169091
+ Node: Shape Operators169743
+ Node: Copying Shapes169960
+ Node: Modifying Shapes170463
+ Node: Affine Transformations for Shapes170982
+ Node: Applying Transformations to Shapes171635
+ Node: Clearing Shapes172126
+ Node: Querying Shapes172583
+ Node: Showing Shapes172881
+ Node: Outputting Shapes173442
+ Node: Transform Reference176595
+ Node: Transform Data Members177242
+ Node: Transform Global Variables and Constants177553
+ Node: Transform Constructors178522
+ Node: Transform Operators179517
+ Node: Matrix Inversion184223
+ Node: Setting Values Transforms184956
+ Node: Querying Transforms185573
+ Node: Returning Information for Transforms186853
+ Ref: Returning Information for Transforms-Footnote-1188896
+ Node: Showing Transforms189001
+ Node: Affine Transformations for Transforms190089
+ Ref: Affine Transformations for Transforms-Footnote-1196387
+ Node: Alignment with an Axis for Transforms196465
+ Node: Resetting Transforms198817
+ Node: Cleaning Transforms199075
+ Node: Label Reference199322
+ Node: Label Data Members200733
+ Node: Copying Labels202474
+ Node: Outputting Labels203236
+ Node: Picture Reference204167
+ Node: Picture Data Members204580
+ Ref: Picture Data Members-Footnote-1206478
+ Node: Picture Global Variables206646
+ Node: Picture Constructors206956
+ Node: Picture Operators207579
+ Node: Affine Transformations for Pictures209145
+ Node: Modifying Pictures210743
+ Node: Showing Pictures211583
+ Ref: Showing Pictures-Footnote-1212797
+ Node: Outputting Pictures212902
+ Node: Picture Output Namespaces213101
+ Node: Namespace Projections213337
+ Node: Namespace Sorting214055
+ Node: Picture Output Functions214630
+ Node: Point Reference223267
+ Node: Point Data Members224191
+ Node: Point Typedefs and Utility Structures230530
+ Node: Point Global Constants and Variables233113
+ Node: Point Constructors and Setting Functions234053
+ Node: Point Destructor236709
+ Node: Point Operators237131
+ Node: Copying Points242171
+ Node: Querying Points242696
+ Ref: Querying Points-Footnote-1244973
+ Node: Returning Coordinates245229
+ Node: Returning Information for Points250281
+ Ref: Returning Information for Points-Footnote-1252552
+ Node: Modifying Points252657
+ Node: Affine Transformations for Points253901
+ Node: Applying Transformations to Points259601
+ Node: Projecting Points259989
+ Node: Vector Operations261023
+ Node: Points and Lines266309
+ Node: Point Intersections270326
+ Node: Point Drawing Functions272236
+ Node: Labelling Points277318
+ Node: Showing Points280566
+ Node: Outputting Points281926
+ Node: Focus Reference284941
+ Node: Focus Data Members285468
+ Node: Focus Global Variables287178
+ Node: Focus Constructors and Setting Functions288191
+ Node: Focus Operators289962
+ Node: Modifying Focuses290228
+ Node: Querying Focuses290522
+ Node: Showing Focuses291631
+ Node: Line Reference292154
+ Node: Line Data Members292805
+ Node: Line Global Constants293140
+ Node: Line Constructors293405
+ Node: Line Operators294103
+ Node: Get Path294322
+ Node: Showing294650
+ Node: Plane Reference295553
+ Node: Planes Data Members296541
+ Node: Planes Global Constants297050
+ Node: Planes Constructors297494
+ Node: Planes Operators299357
+ Node: Planes Returning Information300631
+ Node: Plane Intersections302821
+ Node: Planes Showing306357
+ Node: Path Reference307338
+ Node: Path Data Members308013
+ Ref: Path Data Members-Footnote-1313122
+ Node: Path Constructors and Setting Functions313182
+ Ref: Path Constructors and Setting Functions-Footnote-1319141
+ Ref: Path Constructors and Setting Functions-Footnote-2319780
+ Ref: Path Constructors and Setting Functions-Footnote-3319840
+ Node: Path Destructor320154
+ Node: Path Operators320855
+ Node: Appending to Paths322616
+ Node: Copying Paths323755
+ Node: Clearing Paths324344
+ Node: Modifying Paths325156
+ Node: Affine Transformations for Paths327567
+ Node: Aligning Paths with an Axis332364
+ Node: Applying Transformations to Paths335512
+ Node: Drawing and Filling Paths335949
+ Ref: Drawing and Filling Paths-Footnote-1352861
+ Ref: Drawing and Filling Paths-Footnote-2352915
+ Ref: Drawing and Filling Paths-Footnote-3353017
+ Node: Labelling Paths353375
+ Node: Showing Paths354852
+ Ref: Showing Paths-Footnote-1358492
+ Node: Querying Paths358638
+ Node: Outputting Paths364673
+ Node: Path Intersections367183
+ Node: Polygon Reference368672
+ Node: Polygon Data Members369324
+ Node: Polygon Operators369688
+ Node: Querying Polygons370121
+ Node: Affine Transformations for Polygons370535
+ Node: Polygon Intersections372665
+ Ref: Polygon Intersections-Footnote-1377821
+ Node: Regular Polygon Reference377914
+ Node: Regular Polygon Data Members378942
+ Node: Regular Polygon Constructors and Setting Functions380002
+ Node: Regular Polygon Operators382517
+ Node: Querying Regular Polygons382836
+ Node: Circles for Regular Polygons383098
+ Node: Rectangle Reference385279
+ Node: Rectangle Data Members386301
+ Node: Rectangle Constructors and Setting Functions387243
+ Node: Rectangle Operators389764
+ Node: Returning Points for Rectangles390076
+ Node: Querying Rectangles390559
+ Node: Ellipses for Rectangles391260
+ Node: Regular Closed Plane Curve Reference392949
+ Ref: Regular Closed Plane Curve Reference-Footnote-1395324
+ Node: Regular Closed Plane Curve Data Members395523
+ Node: Querying Regular Closed Plane Curves395983
+ Node: Regular Closed Plane Curve Intersections398656
+ Node: Regular Closed Plane Curve Segments401154
+ Node: Ellipse Reference403602
+ Node: Ellipse Data Members404242
+ Node: Ellipse Constructors and Setting Functions405991
+ Node: Performing Transformations on Ellipses408213
+ Node: Ellipse Operators409347
+ Node: Labeling Ellipses409867
+ Node: Affine Transformations for Ellipses410770
+ Node: Querying Ellipses412959
+ Node: Returning Elements and Information for Ellipses414255
+ Node: Ellipse Intersections418752
+ Node: Solving Ellipses425230
+ Node: Rectangles for Ellipses427532
+ Node: Circle Reference429545
+ Node: Circle Data Members430334
+ Node: Circle Constructors and Setting Functions430585
+ Node: Circle Operators432391
+ Node: Querying Circles432939
+ Node: Circle Intersections433706
+ Node: Pattern Reference434811
+ Node: Plane Tesselations435186
+ Node: Roulettes and Involutes440809
+ Node: Epicycloids441790
+ Node: Solid Reference444739
+ Node: Solid Data Members445533
+ Node: Solid Constructors and Setting Functions447726
+ Node: Solid Destructor448751
+ Node: Solid Operators449173
+ Node: Copying Solids449656
+ Node: Setting Solid Members450242
+ Node: Querying Solids450685
+ Node: Returning Elements and Information Solids451348
+ Node: Getting Shape Centers Solids451828
+ Node: Getting Shapes Solids454229
+ Node: Showing Solids457296
+ Node: Affine Transformations for Solids458183
+ Node: Applying Transformations to Solids459110
+ Node: Outputting Solids459464
+ Node: Drawing and Filling Solids461549
+ Node: Clearing Solids466357
+ Node: Faced Solid Reference466893
+ Node: Solid_Faced Data Members467422
+ Node: Cuboid Reference467855
+ Node: Cuboid Data Members468214
+ Node: Cuboid Constructors and Setting Functions468690
+ Node: Cuboid Operators470613
+ Node: Polyhedron Reference470941
+ Node: Polyhedron Data Members471599
+ Node: Regular Platonic Polyhedra472471
+ Node: Tetrahedron473112
+ Node: Tetrahedron Data Members473498
+ Node: Tetrahedron Constructors and Setting Functions474195
+ Node: Tetrahedron Net475658
+ Ref: Tetrahedron Net-Footnote-1478599
+ Node: Dodecahedron478671
+ Node: Dodecahedron Data Members479098
+ Node: Dodecahedron Constructors and Setting Functions479591
+ Node: Dodecahedron Net480686
+ Node: Icosahedron482695
+ Node: Icosahedron Data Members483095
+ Node: Icosahedron Constructors and Setting Functions483584
+ Node: Icosahedron Net484644
+ Node: Semi-Regular Archimedean Polyhedra486629
+ Node: Truncated Octahedron487037
+ Node: Truncated Octahedron Data Members487574
+ Node: Truncated Octahedron Constructors and Setting Functions488287
+ Node: Truncated Octahedron Net489338
+ Node: Utility Functions490293
+ Node: Perspective Functions491642
+ Node: Adding a File493810
+ Ref: Adding a File-Footnote-1498317
+ Ref: Adding a File-Footnote-2498413
+ Node: Future Plans498569
+ Node: Geometry499337
+ Ref: Geometry-Footnote-1501422
+ Ref: Geometry-Footnote-2501524
+ Node: Curves and Surfaces501609
+ Ref: Curves and Surfaces-Footnote-1503116
+ Ref: Curves and Surfaces-Footnote-2503295
+ Ref: Curves and Surfaces-Footnote-3503367
+ Node: Shadows503534
+ Node: Multi-Threading505479
+ Node: Changes506611
+ Node: Changes in 3DLDF 1.1.5.1506919
+ Node: Changes in 3DLDF 1.1.5507538
+ Node: Changes in 3DLDF 1.1.4.2510122
+ Node: Changes in 3DLDF 1.1.4.1510365
+ Node: Changes in 3DLDF 1.1.4510585
+ Node: Initial version511284
+ Node: Bibliography512696
+ Node: GNU Free Documentation License515808
+ Node: Data Type and Variable Index540996
+ Node: Function Index566065
+ Node: Concept Index609893
+ 
+ End Tag Table
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diff -rc2P 3DLDF-2.0.2/doc/old_doc/Makefile.in 3DLDF-2.0.3/doc/old_doc/Makefile.in
*** 3DLDF-2.0.2/doc/old_doc/Makefile.in	Sun Nov 10 18:30:13 2013
--- 3DLDF-2.0.3/doc/old_doc/Makefile.in	Fri Dec 13 12:29:28 2013
***************
*** 59,62 ****
--- 59,65 ----
  
  #### Laurence.Finston@gmx.de
+ 
+ # html-split
+ # 3DLDF.dvi 3DLDF.ps 3DLDF.pdf 3DLDF.info 3DLDF.html 
  VPATH = @srcdir@
  am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
***************
*** 338,343 ****
  	    ./graphics/png/3DLDF1??.png
  
! EXTRA_DIST = 3DLDF.ps 3DLDF.pdf 3DLDF.dvi \
!               ChangeLog.dev $(3dldf_TEXINFOS) \
                $(3dldf_EPS) $(3dldf_PNG) 
  
--- 341,346 ----
  	    ./graphics/png/3DLDF1??.png
  
! EXTRA_DIST = 3DLDF.ps 3DLDF.pdf 3DLDF.dvi 3DLDF.info 3DLDF.html \
!               ChangeLog.dev $(3dldf_TEXINFOS) 3DLDF/ \
                $(3dldf_EPS) $(3dldf_PNG) 
  
***************
*** 510,513 ****
--- 513,518 ----
  pdf-am:
  
+ ps: ps-am
+ 
  ps-am:
  
***************
*** 529,533 ****
  
  
! all: 3DLDF.dvi 3DLDF.ps 3DLDF.pdf 3DLDF.info 3DLDF.html html-split
  
  .PHONY: pdf
--- 534,538 ----
  
  
! all: 
  
  .PHONY: pdf
***************
*** 542,565 ****
  	echo "distdir = $(distdir)"
  
! .PHONY : ps
! ps: 3DLDF.ps 
  
! 3DLDF.ps : 3DLDF.dvi
! 	@echo Running \"dvips -o 3DLDF.ps 3DLDF.dvi\"
! 	dvips -o 3DLDF.ps 3DLDF.dvi
  
! 3DLDF.dvi: $(3dldf_TEXINFOS)
! 	texi2dvi 3DLDF.texi
  
! 3DLDF.html: $(3dldf_TEXINFOS)
! 	makeinfo --html --no-split 3DLDF.texi
  
! 3DLDF.info: $(3dldf_TEXINFOS)
! 	makeinfo 3DLDF.texi
  
! .PHONY: html-split
  
! html-split: $(3dldf_TEXINFOS)
! 	makeinfo --html 3DLDF.texi
  
  .PHONY : purge
--- 547,570 ----
  	echo "distdir = $(distdir)"
  
! # .PHONY : ps
! # ps: 3DLDF.ps 
  
! # 3DLDF.ps : 3DLDF.dvi
! # 	@echo Running \"dvips -o 3DLDF.ps 3DLDF.dvi\"
! # 	dvips -o 3DLDF.ps 3DLDF.dvi
  
! # 3DLDF.dvi: $(3dldf_TEXINFOS)
! # 	texi2dvi 3DLDF.texi
  
! # 3DLDF.html: $(3dldf_TEXINFOS)
! # 	makeinfo --html --no-split 3DLDF.texi
  
! # 3DLDF.info: $(3dldf_TEXINFOS)
! # 	makeinfo 3DLDF.texi
  
! # .PHONY: html-split
  
! # html-split: $(3dldf_TEXINFOS)
! # 	makeinfo --html 3DLDF.texi
  
  .PHONY : purge
diff -rc2P 3DLDF-2.0.2/doc/texinfo.tex 3DLDF-2.0.3/doc/texinfo.tex
*** 3DLDF-2.0.2/doc/texinfo.tex	Thu Jan  1 00:00:00 1970
--- 3DLDF-2.0.3/doc/texinfo.tex	Wed Nov 13 11:56:28 2013
***************
*** 0 ****
--- 1,10145 ----
+ % texinfo.tex -- TeX macros to handle Texinfo files.
+ % 
+ % Load plain if necessary, i.e., if running under initex.
+ \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
+ %
+ \def\texinfoversion{2013-09-11.11}
+ %
+ % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
+ % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+ % 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+ %
+ % This texinfo.tex file is free software: you can redistribute it and/or
+ % modify it under the terms of the GNU General Public License as
+ % published by the Free Software Foundation, either version 3 of the
+ % License, or (at your option) any later version.
+ %
+ % This texinfo.tex file is distributed in the hope that it will be
+ % useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ % of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ % General Public License for more details.
+ %
+ % You should have received a copy of the GNU General Public License
+ % along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ %
+ % As a special exception, when this file is read by TeX when processing
+ % a Texinfo source document, you may use the result without
+ % restriction. This Exception is an additional permission under section 7
+ % of the GNU General Public License, version 3 ("GPLv3").
+ %
+ % Please try the latest version of texinfo.tex before submitting bug
+ % reports; you can get the latest version from:
+ %   http://ftp.gnu.org/gnu/texinfo/ (the Texinfo release area), or
+ %   http://ftpmirror.gnu.org/texinfo/ (same, via a mirror), or
+ %   http://www.gnu.org/software/texinfo/ (the Texinfo home page)
+ % The texinfo.tex in any given distribution could well be out
+ % of date, so if that's what you're using, please check.
+ %
+ % Send bug reports to bug-texinfo@gnu.org.  Please include including a
+ % complete document in each bug report with which we can reproduce the
+ % problem.  Patches are, of course, greatly appreciated.
+ %
+ % To process a Texinfo manual with TeX, it's most reliable to use the
+ % texi2dvi shell script that comes with the distribution.  For a simple
+ % manual foo.texi, however, you can get away with this:
+ %   tex foo.texi
+ %   texindex foo.??
+ %   tex foo.texi
+ %   tex foo.texi
+ %   dvips foo.dvi -o  # or whatever; this makes foo.ps.
+ % The extra TeX runs get the cross-reference information correct.
+ % Sometimes one run after texindex suffices, and sometimes you need more
+ % than two; texi2dvi does it as many times as necessary.
+ %
+ % It is possible to adapt texinfo.tex for other languages, to some
+ % extent.  You can get the existing language-specific files from the
+ % full Texinfo distribution.
+ %
+ % The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
+ 
+ 
+ \message{Loading texinfo [version \texinfoversion]:}
+ 
+ % If in a .fmt file, print the version number
+ % and turn on active characters that we couldn't do earlier because
+ % they might have appeared in the input file name.
+ \everyjob{\message{[Texinfo version \texinfoversion]}%
+   \catcode`+=\active \catcode`\_=\active}
+ 
+ \chardef\other=12
+ 
+ % We never want plain's \outer definition of \+ in Texinfo.
+ % For @tex, we can use \tabalign.
+ \let\+ = \relax
+ 
+ % Save some plain tex macros whose names we will redefine.
+ \let\ptexb=\b
+ \let\ptexbullet=\bullet
+ \let\ptexc=\c
+ \let\ptexcomma=\,
+ \let\ptexdot=\.
+ \let\ptexdots=\dots
+ \let\ptexend=\end
+ \let\ptexequiv=\equiv
+ \let\ptexexclam=\!
+ \let\ptexfootnote=\footnote
+ \let\ptexgtr=>
+ \let\ptexhat=^
+ \let\ptexi=\i
+ \let\ptexindent=\indent
+ \let\ptexinsert=\insert
+ \let\ptexlbrace=\{
+ \let\ptexless=<
+ \let\ptexnewwrite\newwrite
+ \let\ptexnoindent=\noindent
+ \let\ptexplus=+
+ \let\ptexraggedright=\raggedright
+ \let\ptexrbrace=\}
+ \let\ptexslash=\/
+ \let\ptexstar=\*
+ \let\ptext=\t
+ \let\ptextop=\top
+ {\catcode`\'=\active \global\let\ptexquoteright'}% active in plain's math mode
+ 
+ % If this character appears in an error message or help string, it
+ % starts a new line in the output.
+ \newlinechar = `^^J
+ 
+ % Use TeX 3.0's \inputlineno to get the line number, for better error
+ % messages, but if we're using an old version of TeX, don't do anything.
+ %
+ \ifx\inputlineno\thisisundefined
+   \let\linenumber = \empty % Pre-3.0.
+ \else
+   \def\linenumber{l.\the\inputlineno:\space}
+ \fi
+ 
+ % Set up fixed words for English if not already set.
+ \ifx\putwordAppendix\undefined  \gdef\putwordAppendix{Appendix}\fi
+ \ifx\putwordChapter\undefined   \gdef\putwordChapter{Chapter}\fi
+ \ifx\putworderror\undefined     \gdef\putworderror{error}\fi
+ \ifx\putwordfile\undefined      \gdef\putwordfile{file}\fi
+ \ifx\putwordin\undefined        \gdef\putwordin{in}\fi
+ \ifx\putwordIndexIsEmpty\undefined       \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
+ \ifx\putwordIndexNonexistent\undefined   \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
+ \ifx\putwordInfo\undefined      \gdef\putwordInfo{Info}\fi
+ \ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
+ \ifx\putwordMethodon\undefined  \gdef\putwordMethodon{Method on}\fi
+ \ifx\putwordNoTitle\undefined   \gdef\putwordNoTitle{No Title}\fi
+ \ifx\putwordof\undefined        \gdef\putwordof{of}\fi
+ \ifx\putwordon\undefined        \gdef\putwordon{on}\fi
+ \ifx\putwordpage\undefined      \gdef\putwordpage{page}\fi
+ \ifx\putwordsection\undefined   \gdef\putwordsection{section}\fi
+ \ifx\putwordSection\undefined   \gdef\putwordSection{Section}\fi
+ \ifx\putwordsee\undefined       \gdef\putwordsee{see}\fi
+ \ifx\putwordSee\undefined       \gdef\putwordSee{See}\fi
+ \ifx\putwordShortTOC\undefined  \gdef\putwordShortTOC{Short Contents}\fi
+ \ifx\putwordTOC\undefined       \gdef\putwordTOC{Table of Contents}\fi
+ %
+ \ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
+ \ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
+ \ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
+ \ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
+ \ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
+ \ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
+ \ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
+ \ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
+ \ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
+ \ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
+ \ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
+ \ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
+ %
+ \ifx\putwordDefmac\undefined    \gdef\putwordDefmac{Macro}\fi
+ \ifx\putwordDefspec\undefined   \gdef\putwordDefspec{Special Form}\fi
+ \ifx\putwordDefvar\undefined    \gdef\putwordDefvar{Variable}\fi
+ \ifx\putwordDefopt\undefined    \gdef\putwordDefopt{User Option}\fi
+ \ifx\putwordDeffunc\undefined   \gdef\putwordDeffunc{Function}\fi
+ 
+ % Since the category of space is not known, we have to be careful.
+ \chardef\spacecat = 10
+ \def\spaceisspace{\catcode`\ =\spacecat}
+ 
+ % sometimes characters are active, so we need control sequences.
+ \chardef\ampChar   = `\&
+ \chardef\colonChar = `\:
+ \chardef\commaChar = `\,
+ \chardef\dashChar  = `\-
+ \chardef\dotChar   = `\.
+ \chardef\exclamChar= `\!
+ \chardef\hashChar  = `\#
+ \chardef\lquoteChar= `\`
+ \chardef\questChar = `\?
+ \chardef\rquoteChar= `\'
+ \chardef\semiChar  = `\;
+ \chardef\slashChar = `\/
+ \chardef\underChar = `\_
+ 
+ % Ignore a token.
+ %
+ \def\gobble#1{}
+ 
+ % The following is used inside several \edef's.
+ \def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
+ 
+ % Hyphenation fixes.
+ \hyphenation{
+   Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
+   ap-pen-dix bit-map bit-maps
+   data-base data-bases eshell fall-ing half-way long-est man-u-script
+   man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
+   par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
+   spell-ing spell-ings
+   stand-alone strong-est time-stamp time-stamps which-ever white-space
+   wide-spread wrap-around
+ }
+ 
+ % Margin to add to right of even pages, to left of odd pages.
+ \newdimen\bindingoffset
+ \newdimen\normaloffset
+ \newdimen\pagewidth \newdimen\pageheight
+ 
+ % For a final copy, take out the rectangles
+ % that mark overfull boxes (in case you have decided
+ % that the text looks ok even though it passes the margin).
+ %
+ \def\finalout{\overfullrule=0pt }
+ 
+ % Sometimes it is convenient to have everything in the transcript file
+ % and nothing on the terminal.  We don't just call \tracingall here,
+ % since that produces some useless output on the terminal.  We also make
+ % some effort to order the tracing commands to reduce output in the log
+ % file; cf. trace.sty in LaTeX.
+ %
+ \def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
+ \def\loggingall{%
+   \tracingstats2
+   \tracingpages1
+   \tracinglostchars2  % 2 gives us more in etex
+   \tracingparagraphs1
+   \tracingoutput1
+   \tracingmacros2
+   \tracingrestores1
+   \showboxbreadth\maxdimen \showboxdepth\maxdimen
+   \ifx\eTeXversion\thisisundefined\else % etex gives us more logging
+     \tracingscantokens1
+     \tracingifs1
+     \tracinggroups1
+     \tracingnesting2
+     \tracingassigns1
+   \fi
+   \tracingcommands3  % 3 gives us more in etex
+   \errorcontextlines16
+ }%
+ 
+ % @errormsg{MSG}.  Do the index-like expansions on MSG, but if things
+ % aren't perfect, it's not the end of the world, being an error message,
+ % after all.
+ % 
+ \def\errormsg{\begingroup \indexnofonts \doerrormsg}
+ \def\doerrormsg#1{\errmessage{#1}}
+ 
+ % add check for \lastpenalty to plain's definitions.  If the last thing
+ % we did was a \nobreak, we don't want to insert more space.
+ %
+ \def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
+   \removelastskip\penalty-50\smallskip\fi\fi}
+ \def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
+   \removelastskip\penalty-100\medskip\fi\fi}
+ \def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
+   \removelastskip\penalty-200\bigskip\fi\fi}
+ 
+ % Do @cropmarks to get crop marks.
+ %
+ \newif\ifcropmarks
+ \let\cropmarks = \cropmarkstrue
+ %
+ % Dimensions to add cropmarks at corners.
+ % Added by P. A. MacKay, 12 Nov. 1986
+ %
+ \newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
+ \newdimen\cornerlong  \cornerlong=1pc
+ \newdimen\cornerthick \cornerthick=.3pt
+ \newdimen\topandbottommargin \topandbottommargin=.75in
+ 
+ % Output a mark which sets \thischapter, \thissection and \thiscolor.
+ % We dump everything together because we only have one kind of mark.
+ % This works because we only use \botmark / \topmark, not \firstmark.
+ %
+ % A mark contains a subexpression of the \ifcase ... \fi construct.
+ % \get*marks macros below extract the needed part using \ifcase.
+ %
+ % Another complication is to let the user choose whether \thischapter
+ % (\thissection) refers to the chapter (section) in effect at the top
+ % of a page, or that at the bottom of a page.  The solution is
+ % described on page 260 of The TeXbook.  It involves outputting two
+ % marks for the sectioning macros, one before the section break, and
+ % one after.  I won't pretend I can describe this better than DEK...
+ \def\domark{%
+   \toks0=\expandafter{\lastchapterdefs}%
+   \toks2=\expandafter{\lastsectiondefs}%
+   \toks4=\expandafter{\prevchapterdefs}%
+   \toks6=\expandafter{\prevsectiondefs}%
+   \toks8=\expandafter{\lastcolordefs}%
+   \mark{%
+                    \the\toks0 \the\toks2  % 0: top marks (\last...)
+       \noexpand\or \the\toks4 \the\toks6  % 1: bottom marks (default, \prev...)
+     \noexpand\else \the\toks8             % 2: color marks
+   }%
+ }
+ % \topmark doesn't work for the very first chapter (after the title
+ % page or the contents), so we use \firstmark there -- this gets us
+ % the mark with the chapter defs, unless the user sneaks in, e.g.,
+ % @setcolor (or @url, or @link, etc.) between @contents and the very
+ % first @chapter.
+ \def\gettopheadingmarks{%
+   \ifcase0\topmark\fi
+   \ifx\thischapter\empty \ifcase0\firstmark\fi \fi
+ }
+ \def\getbottomheadingmarks{\ifcase1\botmark\fi}
+ \def\getcolormarks{\ifcase2\topmark\fi}
+ 
+ % Avoid "undefined control sequence" errors.
+ \def\lastchapterdefs{}
+ \def\lastsectiondefs{}
+ \def\prevchapterdefs{}
+ \def\prevsectiondefs{}
+ \def\lastcolordefs{}
+ 
+ % Main output routine.
+ \chardef\PAGE = 255
+ \output = {\onepageout{\pagecontents\PAGE}}
+ 
+ \newbox\headlinebox
+ \newbox\footlinebox
+ 
+ % \onepageout takes a vbox as an argument.  Note that \pagecontents
+ % does insertions, but you have to call it yourself.
+ \def\onepageout#1{%
+   \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
+   %
+   \ifodd\pageno  \advance\hoffset by \bindingoffset
+   \else \advance\hoffset by -\bindingoffset\fi
+   %
+   % Do this outside of the \shipout so @code etc. will be expanded in
+   % the headline as they should be, not taken literally (outputting ''code).
+   \def\commmonheadfootline{\let\hsize=\pagewidth \texinfochars}
+   %
+   \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
+   \global\setbox\headlinebox = \vbox{\commmonheadfootline \makeheadline}%
+   %
+   \ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
+   \global\setbox\footlinebox = \vbox{\commmonheadfootline \makefootline}%
+   %
+   {%
+     % Have to do this stuff outside the \shipout because we want it to
+     % take effect in \write's, yet the group defined by the \vbox ends
+     % before the \shipout runs.
+     %
+     \indexdummies         % don't expand commands in the output.
+     \normalturnoffactive  % \ in index entries must not stay \, e.g., if
+                % the page break happens to be in the middle of an example.
+                % We don't want .vr (or whatever) entries like this:
+                % \entry{{\tt \indexbackslash }acronym}{32}{\code {\acronym}}
+                % "\acronym" won't work when it's read back in;
+                % it needs to be
+                % {\code {{\tt \backslashcurfont }acronym}
+     \shipout\vbox{%
+       % Do this early so pdf references go to the beginning of the page.
+       \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
+       %
+       \ifcropmarks \vbox to \outervsize\bgroup
+         \hsize = \outerhsize
+         \vskip-\topandbottommargin
+         \vtop to0pt{%
+           \line{\ewtop\hfil\ewtop}%
+           \nointerlineskip
+           \line{%
+             \vbox{\moveleft\cornerthick\nstop}%
+             \hfill
+             \vbox{\moveright\cornerthick\nstop}%
+           }%
+           \vss}%
+         \vskip\topandbottommargin
+         \line\bgroup
+           \hfil % center the page within the outer (page) hsize.
+           \ifodd\pageno\hskip\bindingoffset\fi
+           \vbox\bgroup
+       \fi
+       %
+       \unvbox\headlinebox
+       \pagebody{#1}%
+       \ifdim\ht\footlinebox > 0pt
+         % Only leave this space if the footline is nonempty.
+         % (We lessened \vsize for it in \oddfootingyyy.)
+         % The \baselineskip=24pt in plain's \makefootline has no effect.
+         \vskip 24pt
+         \unvbox\footlinebox
+       \fi
+       %
+       \ifcropmarks
+           \egroup % end of \vbox\bgroup
+         \hfil\egroup % end of (centering) \line\bgroup
+         \vskip\topandbottommargin plus1fill minus1fill
+         \boxmaxdepth = \cornerthick
+         \vbox to0pt{\vss
+           \line{%
+             \vbox{\moveleft\cornerthick\nsbot}%
+             \hfill
+             \vbox{\moveright\cornerthick\nsbot}%
+           }%
+           \nointerlineskip
+           \line{\ewbot\hfil\ewbot}%
+         }%
+       \egroup % \vbox from first cropmarks clause
+       \fi
+     }% end of \shipout\vbox
+   }% end of group with \indexdummies
+   \advancepageno
+   \ifnum\outputpenalty>-20000 \else\dosupereject\fi
+ }
+ 
+ \newinsert\margin \dimen\margin=\maxdimen
+ 
+ \def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
+ {\catcode`\@ =11
+ \gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
+ % marginal hacks, juha@viisa.uucp (Juha Takala)
+ \ifvoid\margin\else % marginal info is present
+   \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
+ \dimen@=\dp#1\relax \unvbox#1\relax
+ \ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
+ \ifr@ggedbottom \kern-\dimen@ \vfil \fi}
+ }
+ 
+ % Here are the rules for the cropmarks.  Note that they are
+ % offset so that the space between them is truly \outerhsize or \outervsize
+ % (P. A. MacKay, 12 November, 1986)
+ %
+ \def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
+ \def\nstop{\vbox
+   {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
+ \def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
+ \def\nsbot{\vbox
+   {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
+ 
+ % Parse an argument, then pass it to #1.  The argument is the rest of
+ % the input line (except we remove a trailing comment).  #1 should be a
+ % macro which expects an ordinary undelimited TeX argument.
+ %
+ \def\parsearg{\parseargusing{}}
+ \def\parseargusing#1#2{%
+   \def\argtorun{#2}%
+   \begingroup
+     \obeylines
+     \spaceisspace
+     #1%
+     \parseargline\empty% Insert the \empty token, see \finishparsearg below.
+ }
+ 
+ {\obeylines %
+   \gdef\parseargline#1^^M{%
+     \endgroup % End of the group started in \parsearg.
+     \argremovecomment #1\comment\ArgTerm%
+   }%
+ }
+ 
+ % First remove any @comment, then any @c comment.
+ \def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
+ \def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
+ 
+ % Each occurrence of `\^^M' or `<space>\^^M' is replaced by a single space.
+ %
+ % \argremovec might leave us with trailing space, e.g.,
+ %    @end itemize  @c foo
+ % This space token undergoes the same procedure and is eventually removed
+ % by \finishparsearg.
+ %
+ \def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
+ \def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
+ \def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
+   \def\temp{#3}%
+   \ifx\temp\empty
+     % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
+     \let\temp\finishparsearg
+   \else
+     \let\temp\argcheckspaces
+   \fi
+   % Put the space token in:
+   \temp#1 #3\ArgTerm
+ }
+ 
+ % If a _delimited_ argument is enclosed in braces, they get stripped; so
+ % to get _exactly_ the rest of the line, we had to prevent such situation.
+ % We prepended an \empty token at the very beginning and we expand it now,
+ % just before passing the control to \argtorun.
+ % (Similarly, we have to think about #3 of \argcheckspacesY above: it is
+ % either the null string, or it ends with \^^M---thus there is no danger
+ % that a pair of braces would be stripped.
+ %
+ % But first, we have to remove the trailing space token.
+ %
+ \def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
+ 
+ % \parseargdef\foo{...}
+ %	is roughly equivalent to
+ % \def\foo{\parsearg\Xfoo}
+ % \def\Xfoo#1{...}
+ %
+ % Actually, I use \csname\string\foo\endcsname, ie. \\foo, as it is my
+ % favourite TeX trick.  --kasal, 16nov03
+ 
+ \def\parseargdef#1{%
+   \expandafter \doparseargdef \csname\string#1\endcsname #1%
+ }
+ \def\doparseargdef#1#2{%
+   \def#2{\parsearg#1}%
+   \def#1##1%
+ }
+ 
+ % Several utility definitions with active space:
+ {
+   \obeyspaces
+   \gdef\obeyedspace{ }
+ 
+   % Make each space character in the input produce a normal interword
+   % space in the output.  Don't allow a line break at this space, as this
+   % is used only in environments like @example, where each line of input
+   % should produce a line of output anyway.
+   %
+   \gdef\sepspaces{\obeyspaces\let =\tie}
+ 
+   % If an index command is used in an @example environment, any spaces
+   % therein should become regular spaces in the raw index file, not the
+   % expansion of \tie (\leavevmode \penalty \@M \ ).
+   \gdef\unsepspaces{\let =\space}
+ }
+ 
+ 
+ \def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
+ 
+ % Define the framework for environments in texinfo.tex.  It's used like this:
+ %
+ %   \envdef\foo{...}
+ %   \def\Efoo{...}
+ %
+ % It's the responsibility of \envdef to insert \begingroup before the
+ % actual body; @end closes the group after calling \Efoo.  \envdef also
+ % defines \thisenv, so the current environment is known; @end checks
+ % whether the environment name matches.  The \checkenv macro can also be
+ % used to check whether the current environment is the one expected.
+ %
+ % Non-false conditionals (@iftex, @ifset) don't fit into this, so they
+ % are not treated as environments; they don't open a group.  (The
+ % implementation of @end takes care not to call \endgroup in this
+ % special case.)
+ 
+ 
+ % At run-time, environments start with this:
+ \def\startenvironment#1{\begingroup\def\thisenv{#1}}
+ % initialize
+ \let\thisenv\empty
+ 
+ % ... but they get defined via ``\envdef\foo{...}'':
+ \long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
+ \def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
+ 
+ % Check whether we're in the right environment:
+ \def\checkenv#1{%
+   \def\temp{#1}%
+   \ifx\thisenv\temp
+   \else
+     \badenverr
+   \fi
+ }
+ 
+ % Environment mismatch, #1 expected:
+ \def\badenverr{%
+   \errhelp = \EMsimple
+   \errmessage{This command can appear only \inenvironment\temp,
+     not \inenvironment\thisenv}%
+ }
+ \def\inenvironment#1{%
+   \ifx#1\empty
+     outside of any environment%
+   \else
+     in environment \expandafter\string#1%
+   \fi
+ }
+ 
+ % @end foo executes the definition of \Efoo.
+ % But first, it executes a specialized version of \checkenv
+ %
+ \parseargdef\end{%
+   \if 1\csname iscond.#1\endcsname
+   \else
+     % The general wording of \badenverr may not be ideal.
+     \expandafter\checkenv\csname#1\endcsname
+     \csname E#1\endcsname
+     \endgroup
+   \fi
+ }
+ 
+ \newhelp\EMsimple{Press RETURN to continue.}
+ 
+ 
+ % Be sure we're in horizontal mode when doing a tie, since we make space
+ % equivalent to this in @example-like environments. Otherwise, a space
+ % at the beginning of a line will start with \penalty -- and
+ % since \penalty is valid in vertical mode, we'd end up putting the
+ % penalty on the vertical list instead of in the new paragraph.
+ {\catcode`@ = 11
+  % Avoid using \@M directly, because that causes trouble
+  % if the definition is written into an index file.
+  \global\let\tiepenalty = \@M
+  \gdef\tie{\leavevmode\penalty\tiepenalty\ }
+ }
+ 
+ % @: forces normal size whitespace following.
+ \def\:{\spacefactor=1000 }
+ 
+ % @* forces a line break.
+ \def\*{\unskip\hfil\break\hbox{}\ignorespaces}
+ 
+ % @/ allows a line break.
+ \let\/=\allowbreak
+ 
+ % @. is an end-of-sentence period.
+ \def\.{.\spacefactor=\endofsentencespacefactor\space}
+ 
+ % @! is an end-of-sentence bang.
+ \def\!{!\spacefactor=\endofsentencespacefactor\space}
+ 
+ % @? is an end-of-sentence query.
+ \def\?{?\spacefactor=\endofsentencespacefactor\space}
+ 
+ % @frenchspacing on|off  says whether to put extra space after punctuation.
+ %
+ \def\onword{on}
+ \def\offword{off}
+ %
+ \parseargdef\frenchspacing{%
+   \def\temp{#1}%
+   \ifx\temp\onword \plainfrenchspacing
+   \else\ifx\temp\offword \plainnonfrenchspacing
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @frenchspacing option `\temp', must be on|off}%
+   \fi\fi
+ }
+ 
+ % @w prevents a word break.  Without the \leavevmode, @w at the
+ % beginning of a paragraph, when TeX is still in vertical mode, would
+ % produce a whole line of output instead of starting the paragraph.
+ \def\w#1{\leavevmode\hbox{#1}}
+ 
+ % @group ... @end group forces ... to be all on one page, by enclosing
+ % it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
+ % to keep its height that of a normal line.  According to the rules for
+ % \topskip (p.114 of the TeXbook), the glue inserted is
+ % max (\topskip - \ht (first item), 0).  If that height is large,
+ % therefore, no glue is inserted, and the space between the headline and
+ % the text is small, which looks bad.
+ %
+ % Another complication is that the group might be very large.  This can
+ % cause the glue on the previous page to be unduly stretched, because it
+ % does not have much material.  In this case, it's better to add an
+ % explicit \vfill so that the extra space is at the bottom.  The
+ % threshold for doing this is if the group is more than \vfilllimit
+ % percent of a page (\vfilllimit can be changed inside of @tex).
+ %
+ \newbox\groupbox
+ \def\vfilllimit{0.7}
+ %
+ \envdef\group{%
+   \ifnum\catcode`\^^M=\active \else
+     \errhelp = \groupinvalidhelp
+     \errmessage{@group invalid in context where filling is enabled}%
+   \fi
+   \startsavinginserts
+   %
+   \setbox\groupbox = \vtop\bgroup
+     % Do @comment since we are called inside an environment such as
+     % @example, where each end-of-line in the input causes an
+     % end-of-line in the output.  We don't want the end-of-line after
+     % the `@group' to put extra space in the output.  Since @group
+     % should appear on a line by itself (according to the Texinfo
+     % manual), we don't worry about eating any user text.
+     \comment
+ }
+ %
+ % The \vtop produces a box with normal height and large depth; thus, TeX puts
+ % \baselineskip glue before it, and (when the next line of text is done)
+ % \lineskip glue after it.  Thus, space below is not quite equal to space
+ % above.  But it's pretty close.
+ \def\Egroup{%
+     % To get correct interline space between the last line of the group
+     % and the first line afterwards, we have to propagate \prevdepth.
+     \endgraf % Not \par, as it may have been set to \lisppar.
+     \global\dimen1 = \prevdepth
+   \egroup           % End the \vtop.
+   % \dimen0 is the vertical size of the group's box.
+   \dimen0 = \ht\groupbox  \advance\dimen0 by \dp\groupbox
+   % \dimen2 is how much space is left on the page (more or less).
+   \dimen2 = \pageheight   \advance\dimen2 by -\pagetotal
+   % if the group doesn't fit on the current page, and it's a big big
+   % group, force a page break.
+   \ifdim \dimen0 > \dimen2
+     \ifdim \pagetotal < \vfilllimit\pageheight
+       \page
+     \fi
+   \fi
+   \box\groupbox
+   \prevdepth = \dimen1
+   \checkinserts
+ }
+ %
+ % TeX puts in an \escapechar (i.e., `@') at the beginning of the help
+ % message, so this ends up printing `@group can only ...'.
+ %
+ \newhelp\groupinvalidhelp{%
+ group can only be used in environments such as @example,^^J%
+ where each line of input produces a line of output.}
+ 
+ % @need space-in-mils
+ % forces a page break if there is not space-in-mils remaining.
+ 
+ \newdimen\mil  \mil=0.001in
+ 
+ \parseargdef\need{%
+   % Ensure vertical mode, so we don't make a big box in the middle of a
+   % paragraph.
+   \par
+   %
+   % If the @need value is less than one line space, it's useless.
+   \dimen0 = #1\mil
+   \dimen2 = \ht\strutbox
+   \advance\dimen2 by \dp\strutbox
+   \ifdim\dimen0 > \dimen2
+     %
+     % Do a \strut just to make the height of this box be normal, so the
+     % normal leading is inserted relative to the preceding line.
+     % And a page break here is fine.
+     \vtop to #1\mil{\strut\vfil}%
+     %
+     % TeX does not even consider page breaks if a penalty added to the
+     % main vertical list is 10000 or more.  But in order to see if the
+     % empty box we just added fits on the page, we must make it consider
+     % page breaks.  On the other hand, we don't want to actually break the
+     % page after the empty box.  So we use a penalty of 9999.
+     %
+     % There is an extremely small chance that TeX will actually break the
+     % page at this \penalty, if there are no other feasible breakpoints in
+     % sight.  (If the user is using lots of big @group commands, which
+     % almost-but-not-quite fill up a page, TeX will have a hard time doing
+     % good page breaking, for example.)  However, I could not construct an
+     % example where a page broke at this \penalty; if it happens in a real
+     % document, then we can reconsider our strategy.
+     \penalty9999
+     %
+     % Back up by the size of the box, whether we did a page break or not.
+     \kern -#1\mil
+     %
+     % Do not allow a page break right after this kern.
+     \nobreak
+   \fi
+ }
+ 
+ % @br   forces paragraph break (and is undocumented).
+ 
+ \let\br = \par
+ 
+ % @page forces the start of a new page.
+ %
+ \def\page{\par\vfill\supereject}
+ 
+ % @exdent text....
+ % outputs text on separate line in roman font, starting at standard page margin
+ 
+ % This records the amount of indent in the innermost environment.
+ % That's how much \exdent should take out.
+ \newskip\exdentamount
+ 
+ % This defn is used inside fill environments such as @defun.
+ \parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
+ 
+ % This defn is used inside nofill environments such as @example.
+ \parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
+   \leftline{\hskip\leftskip{\rm#1}}}}
+ 
+ % @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
+ % paragraph.  For more general purposes, use the \margin insertion
+ % class.  WHICH is `l' or `r'.  Not documented, written for gawk manual.
+ %
+ \newskip\inmarginspacing \inmarginspacing=1cm
+ \def\strutdepth{\dp\strutbox}
+ %
+ \def\doinmargin#1#2{\strut\vadjust{%
+   \nobreak
+   \kern-\strutdepth
+   \vtop to \strutdepth{%
+     \baselineskip=\strutdepth
+     \vss
+     % if you have multiple lines of stuff to put here, you'll need to
+     % make the vbox yourself of the appropriate size.
+     \ifx#1l%
+       \llap{\ignorespaces #2\hskip\inmarginspacing}%
+     \else
+       \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
+     \fi
+     \null
+   }%
+ }}
+ \def\inleftmargin{\doinmargin l}
+ \def\inrightmargin{\doinmargin r}
+ %
+ % @inmargin{TEXT [, RIGHT-TEXT]}
+ % (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
+ % else use TEXT for both).
+ %
+ \def\inmargin#1{\parseinmargin #1,,\finish}
+ \def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
+   \setbox0 = \hbox{\ignorespaces #2}%
+   \ifdim\wd0 > 0pt
+     \def\lefttext{#1}%  have both texts
+     \def\righttext{#2}%
+   \else
+     \def\lefttext{#1}%  have only one text
+     \def\righttext{#1}%
+   \fi
+   %
+   \ifodd\pageno
+     \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
+   \else
+     \def\temp{\inleftmargin\lefttext}%
+   \fi
+   \temp
+ }
+ 
+ % @| inserts a changebar to the left of the current line.  It should
+ % surround any changed text.  This approach does *not* work if the
+ % change spans more than two lines of output.  To handle that, we would
+ % have adopt a much more difficult approach (putting marks into the main
+ % vertical list for the beginning and end of each change).  This command
+ % is not documented, not supported, and doesn't work.
+ %
+ \def\|{%
+   % \vadjust can only be used in horizontal mode.
+   \leavevmode
+   %
+   % Append this vertical mode material after the current line in the output.
+   \vadjust{%
+     % We want to insert a rule with the height and depth of the current
+     % leading; that is exactly what \strutbox is supposed to record.
+     \vskip-\baselineskip
+     %
+     % \vadjust-items are inserted at the left edge of the type.  So
+     % the \llap here moves out into the left-hand margin.
+     \llap{%
+       %
+       % For a thicker or thinner bar, change the `1pt'.
+       \vrule height\baselineskip width1pt
+       %
+       % This is the space between the bar and the text.
+       \hskip 12pt
+     }%
+   }%
+ }
+ 
+ % @include FILE -- \input text of FILE.
+ %
+ \def\include{\parseargusing\filenamecatcodes\includezzz}
+ \def\includezzz#1{%
+   \pushthisfilestack
+   \def\thisfile{#1}%
+   {%
+     \makevalueexpandable  % we want to expand any @value in FILE.
+     \turnoffactive        % and allow special characters in the expansion
+     \indexnofonts         % Allow `@@' and other weird things in file names.
+     \wlog{texinfo.tex: doing @include of #1^^J}%
+     \edef\temp{\noexpand\input #1 }%
+     %
+     % This trickery is to read FILE outside of a group, in case it makes
+     % definitions, etc.
+     \expandafter
+   }\temp
+   \popthisfilestack
+ }
+ \def\filenamecatcodes{%
+   \catcode`\\=\other
+   \catcode`~=\other
+   \catcode`^=\other
+   \catcode`_=\other
+   \catcode`|=\other
+   \catcode`<=\other
+   \catcode`>=\other
+   \catcode`+=\other
+   \catcode`-=\other
+   \catcode`\`=\other
+   \catcode`\'=\other
+ }
+ 
+ \def\pushthisfilestack{%
+   \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
+ }
+ \def\pushthisfilestackX{%
+   \expandafter\pushthisfilestackY\thisfile\StackTerm
+ }
+ \def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
+   \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
+ }
+ 
+ \def\popthisfilestack{\errthisfilestackempty}
+ \def\errthisfilestackempty{\errmessage{Internal error:
+   the stack of filenames is empty.}}
+ %
+ \def\thisfile{}
+ 
+ % @center line
+ % outputs that line, centered.
+ %
+ \parseargdef\center{%
+   \ifhmode
+     \let\centersub\centerH
+   \else
+     \let\centersub\centerV
+   \fi
+   \centersub{\hfil \ignorespaces#1\unskip \hfil}%
+   \let\centersub\relax % don't let the definition persist, just in case
+ }
+ \def\centerH#1{{%
+   \hfil\break
+   \advance\hsize by -\leftskip
+   \advance\hsize by -\rightskip
+   \line{#1}%
+   \break
+ }}
+ %
+ \newcount\centerpenalty
+ \def\centerV#1{%
+   % The idea here is the same as in \startdefun, \cartouche, etc.: if
+   % @center is the first thing after a section heading, we need to wipe
+   % out the negative parskip inserted by \sectionheading, but still
+   % prevent a page break here.
+   \centerpenalty = \lastpenalty
+   \ifnum\centerpenalty>10000 \vskip\parskip \fi
+   \ifnum\centerpenalty>9999 \penalty\centerpenalty \fi
+   \line{\kern\leftskip #1\kern\rightskip}%
+ }
+ 
+ % @sp n   outputs n lines of vertical space
+ %
+ \parseargdef\sp{\vskip #1\baselineskip}
+ 
+ % @comment ...line which is ignored...
+ % @c is the same as @comment
+ % @ignore ... @end ignore  is another way to write a comment
+ %
+ \def\comment{\begingroup \catcode`\^^M=\other%
+ \catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
+ \commentxxx}
+ {\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
+ %
+ \let\c=\comment
+ 
+ % @paragraphindent NCHARS
+ % We'll use ems for NCHARS, close enough.
+ % NCHARS can also be the word `asis' or `none'.
+ % We cannot feasibly implement @paragraphindent asis, though.
+ %
+ \def\asisword{asis} % no translation, these are keywords
+ \def\noneword{none}
+ %
+ \parseargdef\paragraphindent{%
+   \def\temp{#1}%
+   \ifx\temp\asisword
+   \else
+     \ifx\temp\noneword
+       \defaultparindent = 0pt
+     \else
+       \defaultparindent = #1em
+     \fi
+   \fi
+   \parindent = \defaultparindent
+ }
+ 
+ % @exampleindent NCHARS
+ % We'll use ems for NCHARS like @paragraphindent.
+ % It seems @exampleindent asis isn't necessary, but
+ % I preserve it to make it similar to @paragraphindent.
+ \parseargdef\exampleindent{%
+   \def\temp{#1}%
+   \ifx\temp\asisword
+   \else
+     \ifx\temp\noneword
+       \lispnarrowing = 0pt
+     \else
+       \lispnarrowing = #1em
+     \fi
+   \fi
+ }
+ 
+ % @firstparagraphindent WORD
+ % If WORD is `none', then suppress indentation of the first paragraph
+ % after a section heading.  If WORD is `insert', then do indent at such
+ % paragraphs.
+ %
+ % The paragraph indentation is suppressed or not by calling
+ % \suppressfirstparagraphindent, which the sectioning commands do.
+ % We switch the definition of this back and forth according to WORD.
+ % By default, we suppress indentation.
+ %
+ \def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
+ \def\insertword{insert}
+ %
+ \parseargdef\firstparagraphindent{%
+   \def\temp{#1}%
+   \ifx\temp\noneword
+     \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
+   \else\ifx\temp\insertword
+     \let\suppressfirstparagraphindent = \relax
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @firstparagraphindent option `\temp'}%
+   \fi\fi
+ }
+ 
+ % Here is how we actually suppress indentation.  Redefine \everypar to
+ % \kern backwards by \parindent, and then reset itself to empty.
+ %
+ % We also make \indent itself not actually do anything until the next
+ % paragraph.
+ %
+ \gdef\dosuppressfirstparagraphindent{%
+   \gdef\indent{%
+     \restorefirstparagraphindent
+     \indent
+   }%
+   \gdef\noindent{%
+     \restorefirstparagraphindent
+     \noindent
+   }%
+   \global\everypar = {%
+     \kern -\parindent
+     \restorefirstparagraphindent
+   }%
+ }
+ 
+ \gdef\restorefirstparagraphindent{%
+   \global \let \indent = \ptexindent
+   \global \let \noindent = \ptexnoindent
+   \global \everypar = {}%
+ }
+ 
+ 
+ % @refill is a no-op.
+ \let\refill=\relax
+ 
+ % If working on a large document in chapters, it is convenient to
+ % be able to disable indexing, cross-referencing, and contents, for test runs.
+ % This is done with @novalidate (before @setfilename).
+ %
+ \newif\iflinks \linkstrue % by default we want the aux files.
+ \let\novalidate = \linksfalse
+ 
+ % @setfilename is done at the beginning of every texinfo file.
+ % So open here the files we need to have open while reading the input.
+ % This makes it possible to make a .fmt file for texinfo.
+ \def\setfilename{%
+    \fixbackslash  % Turn off hack to swallow `\input texinfo'.
+    \iflinks
+      \tryauxfile
+      % Open the new aux file.  TeX will close it automatically at exit.
+      \immediate\openout\auxfile=\jobname.aux
+    \fi % \openindices needs to do some work in any case.
+    \openindices
+    \let\setfilename=\comment % Ignore extra @setfilename cmds.
+    %
+    % If texinfo.cnf is present on the system, read it.
+    % Useful for site-wide @afourpaper, etc.
+    \openin 1 texinfo.cnf
+    \ifeof 1 \else \input texinfo.cnf \fi
+    \closein 1
+    %
+    \comment % Ignore the actual filename.
+ }
+ 
+ % Called from \setfilename.
+ %
+ \def\openindices{%
+   \newindex{cp}%
+   \newcodeindex{fn}%
+   \newcodeindex{vr}%
+   \newcodeindex{tp}%
+   \newcodeindex{ky}%
+   \newcodeindex{pg}%
+ }
+ 
+ % @bye.
+ \outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
+ 
+ 
+ \message{pdf,}
+ % adobe `portable' document format
+ \newcount\tempnum
+ \newcount\lnkcount
+ \newtoks\filename
+ \newcount\filenamelength
+ \newcount\pgn
+ \newtoks\toksA
+ \newtoks\toksB
+ \newtoks\toksC
+ \newtoks\toksD
+ \newbox\boxA
+ \newcount\countA
+ \newif\ifpdf
+ \newif\ifpdfmakepagedest
+ 
+ % when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
+ % can be set).  So we test for \relax and 0 as well as being undefined.
+ \ifx\pdfoutput\thisisundefined
+ \else
+   \ifx\pdfoutput\relax
+   \else
+     \ifcase\pdfoutput
+     \else
+       \pdftrue
+     \fi
+   \fi
+ \fi
+ 
+ % PDF uses PostScript string constants for the names of xref targets,
+ % for display in the outlines, and in other places.  Thus, we have to
+ % double any backslashes.  Otherwise, a name like "\node" will be
+ % interpreted as a newline (\n), followed by o, d, e.  Not good.
+ % 
+ % See http://www.ntg.nl/pipermail/ntg-pdftex/2004-July/000654.html and
+ % related messages.  The final outcome is that it is up to the TeX user
+ % to double the backslashes and otherwise make the string valid, so
+ % that's what we do.  pdftex 1.30.0 (ca.2005) introduced a primitive to
+ % do this reliably, so we use it.
+ 
+ % #1 is a control sequence in which to do the replacements,
+ % which we \xdef.
+ \def\txiescapepdf#1{%
+   \ifx\pdfescapestring\thisisundefined
+     % No primitive available; should we give a warning or log?
+     % Many times it won't matter.
+   \else
+     % The expandable \pdfescapestring primitive escapes parentheses,
+     % backslashes, and other special chars.
+     \xdef#1{\pdfescapestring{#1}}%
+   \fi
+ }
+ 
+ \newhelp\nopdfimagehelp{Texinfo supports .png, .jpg, .jpeg, and .pdf images
+ with PDF output, and none of those formats could be found.  (.eps cannot
+ be supported due to the design of the PDF format; use regular TeX (DVI
+ output) for that.)}
+ 
+ \ifpdf
+   %
+   % Color manipulation macros based on pdfcolor.tex,
+   % except using rgb instead of cmyk; the latter is said to render as a
+   % very dark gray on-screen and a very dark halftone in print, instead
+   % of actual black.
+   \def\rgbDarkRed{0.50 0.09 0.12}
+   \def\rgbBlack{0 0 0}
+   %
+   % k sets the color for filling (usual text, etc.);
+   % K sets the color for stroking (thin rules, e.g., normal _'s).
+   \def\pdfsetcolor#1{\pdfliteral{#1 rg  #1 RG}}
+   %
+   % Set color, and create a mark which defines \thiscolor accordingly,
+   % so that \makeheadline knows which color to restore.
+   \def\setcolor#1{%
+     \xdef\lastcolordefs{\gdef\noexpand\thiscolor{#1}}%
+     \domark
+     \pdfsetcolor{#1}%
+   }
+   %
+   \def\maincolor{\rgbBlack}
+   \pdfsetcolor{\maincolor}
+   \edef\thiscolor{\maincolor}
+   \def\lastcolordefs{}
+   %
+   \def\makefootline{%
+     \baselineskip24pt
+     \line{\pdfsetcolor{\maincolor}\the\footline}%
+   }
+   %
+   \def\makeheadline{%
+     \vbox to 0pt{%
+       \vskip-22.5pt
+       \line{%
+         \vbox to8.5pt{}%
+         % Extract \thiscolor definition from the marks.
+         \getcolormarks
+         % Typeset the headline with \maincolor, then restore the color.
+         \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
+       }%
+       \vss
+     }%
+     \nointerlineskip
+   }
+   %
+   %
+   \pdfcatalog{/PageMode /UseOutlines}
+   %
+   % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
+   \def\dopdfimage#1#2#3{%
+     \def\pdfimagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
+     \def\pdfimageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
+     %
+     % pdftex (and the PDF format) support .pdf, .png, .jpg (among
+     % others).  Let's try in that order, PDF first since if
+     % someone has a scalable image, presumably better to use that than a
+     % bitmap.
+     \let\pdfimgext=\empty
+     \begingroup
+       \openin 1 #1.pdf \ifeof 1
+         \openin 1 #1.PDF \ifeof 1
+           \openin 1 #1.png \ifeof 1
+             \openin 1 #1.jpg \ifeof 1
+               \openin 1 #1.jpeg \ifeof 1
+                 \openin 1 #1.JPG \ifeof 1
+                   \errhelp = \nopdfimagehelp
+                   \errmessage{Could not find image file #1 for pdf}%
+                 \else \gdef\pdfimgext{JPG}%
+                 \fi
+               \else \gdef\pdfimgext{jpeg}%
+               \fi
+             \else \gdef\pdfimgext{jpg}%
+             \fi
+           \else \gdef\pdfimgext{png}%
+           \fi
+         \else \gdef\pdfimgext{PDF}%
+         \fi
+       \else \gdef\pdfimgext{pdf}%
+       \fi
+       \closein 1
+     \endgroup
+     %
+     % without \immediate, ancient pdftex seg faults when the same image is
+     % included twice.  (Version 3.14159-pre-1.0-unofficial-20010704.)
+     \ifnum\pdftexversion < 14
+       \immediate\pdfimage
+     \else
+       \immediate\pdfximage
+     \fi
+       \ifdim \wd0 >0pt width \pdfimagewidth \fi
+       \ifdim \wd2 >0pt height \pdfimageheight \fi
+       \ifnum\pdftexversion<13
+          #1.\pdfimgext
+        \else
+          {#1.\pdfimgext}%
+        \fi
+     \ifnum\pdftexversion < 14 \else
+       \pdfrefximage \pdflastximage
+     \fi}
+   %
+   \def\pdfmkdest#1{{%
+     % We have to set dummies so commands such as @code, and characters
+     % such as \, aren't expanded when present in a section title.
+     \indexnofonts
+     \turnoffactive
+     \makevalueexpandable
+     \def\pdfdestname{#1}%
+     \txiescapepdf\pdfdestname
+     \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
+   }}
+   %
+   % used to mark target names; must be expandable.
+   \def\pdfmkpgn#1{#1}
+   %
+   % by default, use a color that is dark enough to print on paper as
+   % nearly black, but still distinguishable for online viewing.
+   \def\urlcolor{\rgbDarkRed}
+   \def\linkcolor{\rgbDarkRed}
+   \def\endlink{\setcolor{\maincolor}\pdfendlink}
+   %
+   % Adding outlines to PDF; macros for calculating structure of outlines
+   % come from Petr Olsak
+   \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
+     \else \csname#1\endcsname \fi}
+   \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
+     \advance\tempnum by 1
+     \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
+   %
+   % #1 is the section text, which is what will be displayed in the
+   % outline by the pdf viewer.  #2 is the pdf expression for the number
+   % of subentries (or empty, for subsubsections).  #3 is the node text,
+   % which might be empty if this toc entry had no corresponding node.
+   % #4 is the page number
+   %
+   \def\dopdfoutline#1#2#3#4{%
+     % Generate a link to the node text if that exists; else, use the
+     % page number.  We could generate a destination for the section
+     % text in the case where a section has no node, but it doesn't
+     % seem worth the trouble, since most documents are normally structured.
+     \edef\pdfoutlinedest{#3}%
+     \ifx\pdfoutlinedest\empty
+       \def\pdfoutlinedest{#4}%
+     \else
+       \txiescapepdf\pdfoutlinedest
+     \fi
+     %
+     % Also escape PDF chars in the display string.
+     \edef\pdfoutlinetext{#1}%
+     \txiescapepdf\pdfoutlinetext
+     %
+     \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{\pdfoutlinetext}%
+   }
+   %
+   \def\pdfmakeoutlines{%
+     \begingroup
+       % Read toc silently, to get counts of subentries for \pdfoutline.
+       \def\partentry##1##2##3##4{}% ignore parts in the outlines
+       \def\numchapentry##1##2##3##4{%
+ 	\def\thischapnum{##2}%
+ 	\def\thissecnum{0}%
+ 	\def\thissubsecnum{0}%
+       }%
+       \def\numsecentry##1##2##3##4{%
+ 	\advancenumber{chap\thischapnum}%
+ 	\def\thissecnum{##2}%
+ 	\def\thissubsecnum{0}%
+       }%
+       \def\numsubsecentry##1##2##3##4{%
+ 	\advancenumber{sec\thissecnum}%
+ 	\def\thissubsecnum{##2}%
+       }%
+       \def\numsubsubsecentry##1##2##3##4{%
+ 	\advancenumber{subsec\thissubsecnum}%
+       }%
+       \def\thischapnum{0}%
+       \def\thissecnum{0}%
+       \def\thissubsecnum{0}%
+       %
+       % use \def rather than \let here because we redefine \chapentry et
+       % al. a second time, below.
+       \def\appentry{\numchapentry}%
+       \def\appsecentry{\numsecentry}%
+       \def\appsubsecentry{\numsubsecentry}%
+       \def\appsubsubsecentry{\numsubsubsecentry}%
+       \def\unnchapentry{\numchapentry}%
+       \def\unnsecentry{\numsecentry}%
+       \def\unnsubsecentry{\numsubsecentry}%
+       \def\unnsubsubsecentry{\numsubsubsecentry}%
+       \readdatafile{toc}%
+       %
+       % Read toc second time, this time actually producing the outlines.
+       % The `-' means take the \expnumber as the absolute number of
+       % subentries, which we calculated on our first read of the .toc above.
+       %
+       % We use the node names as the destinations.
+       \def\numchapentry##1##2##3##4{%
+         \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
+       \def\numsecentry##1##2##3##4{%
+         \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
+       \def\numsubsecentry##1##2##3##4{%
+         \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
+       \def\numsubsubsecentry##1##2##3##4{% count is always zero
+         \dopdfoutline{##1}{}{##3}{##4}}%
+       %
+       % PDF outlines are displayed using system fonts, instead of
+       % document fonts.  Therefore we cannot use special characters,
+       % since the encoding is unknown.  For example, the eogonek from
+       % Latin 2 (0xea) gets translated to a | character.  Info from
+       % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
+       %
+       % TODO this right, we have to translate 8-bit characters to
+       % their "best" equivalent, based on the @documentencoding.  Too
+       % much work for too little return.  Just use the ASCII equivalents
+       % we use for the index sort strings.
+       % 
+       \indexnofonts
+       \setupdatafile
+       % We can have normal brace characters in the PDF outlines, unlike
+       % Texinfo index files.  So set that up.
+       \def\{{\lbracecharliteral}%
+       \def\}{\rbracecharliteral}%
+       \catcode`\\=\active \otherbackslash
+       \input \tocreadfilename
+     \endgroup
+   }
+   {\catcode`[=1 \catcode`]=2
+    \catcode`{=\other \catcode`}=\other
+    \gdef\lbracecharliteral[{]%
+    \gdef\rbracecharliteral[}]%
+   ]
+   %
+   \def\skipspaces#1{\def\PP{#1}\def\D{|}%
+     \ifx\PP\D\let\nextsp\relax
+     \else\let\nextsp\skipspaces
+       \addtokens{\filename}{\PP}%
+       \advance\filenamelength by 1
+     \fi
+     \nextsp}
+   \def\getfilename#1{%
+     \filenamelength=0
+     % If we don't expand the argument now, \skipspaces will get
+     % snagged on things like "@value{foo}".
+     \edef\temp{#1}%
+     \expandafter\skipspaces\temp|\relax
+   }
+   \ifnum\pdftexversion < 14
+     \let \startlink \pdfannotlink
+   \else
+     \let \startlink \pdfstartlink
+   \fi
+   % make a live url in pdf output.
+   \def\pdfurl#1{%
+     \begingroup
+       % it seems we really need yet another set of dummies; have not
+       % tried to figure out what each command should do in the context
+       % of @url.  for now, just make @/ a no-op, that's the only one
+       % people have actually reported a problem with.
+       %
+       \normalturnoffactive
+       \def\@{@}%
+       \let\/=\empty
+       \makevalueexpandable
+       % do we want to go so far as to use \indexnofonts instead of just
+       % special-casing \var here?
+       \def\var##1{##1}%
+       %
+       \leavevmode\setcolor{\urlcolor}%
+       \startlink attr{/Border [0 0 0]}%
+         user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
+     \endgroup}
+   \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
+   \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
+   \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
+   \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
+   \def\maketoks{%
+     \expandafter\poptoks\the\toksA|ENDTOKS|\relax
+     \ifx\first0\adn0
+     \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
+     \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
+     \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
+     \else
+       \ifnum0=\countA\else\makelink\fi
+       \ifx\first.\let\next=\done\else
+         \let\next=\maketoks
+         \addtokens{\toksB}{\the\toksD}
+         \ifx\first,\addtokens{\toksB}{\space}\fi
+       \fi
+     \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+     \next}
+   \def\makelink{\addtokens{\toksB}%
+     {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
+   \def\pdflink#1{%
+     \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
+     \setcolor{\linkcolor}#1\endlink}
+   \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
+ \else
+   % non-pdf mode
+   \let\pdfmkdest = \gobble
+   \let\pdfurl = \gobble
+   \let\endlink = \relax
+   \let\setcolor = \gobble
+   \let\pdfsetcolor = \gobble
+   \let\pdfmakeoutlines = \relax
+ \fi  % \ifx\pdfoutput
+ 
+ 
+ \message{fonts,}
+ 
+ % Change the current font style to #1, remembering it in \curfontstyle.
+ % For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
+ % italics, not bold italics.
+ %
+ \def\setfontstyle#1{%
+   \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
+   \csname ten#1\endcsname  % change the current font
+ }
+ 
+ % Select #1 fonts with the current style.
+ %
+ \def\selectfonts#1{\csname #1fonts\endcsname \csname\curfontstyle\endcsname}
+ 
+ \def\rm{\fam=0 \setfontstyle{rm}}
+ \def\it{\fam=\itfam \setfontstyle{it}}
+ \def\sl{\fam=\slfam \setfontstyle{sl}}
+ \def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
+ \def\tt{\fam=\ttfam \setfontstyle{tt}}
+ 
+ % Unfortunately, we have to override this for titles and the like, since
+ % in those cases "rm" is bold.  Sigh.
+ \def\rmisbold{\rm\def\curfontstyle{bf}}
+ 
+ % Texinfo sort of supports the sans serif font style, which plain TeX does not.
+ % So we set up a \sf.
+ \newfam\sffam
+ \def\sf{\fam=\sffam \setfontstyle{sf}}
+ \let\li = \sf % Sometimes we call it \li, not \sf.
+ 
+ % We don't need math for this font style.
+ \def\ttsl{\setfontstyle{ttsl}}
+ 
+ 
+ % Set the baselineskip to #1, and the lineskip and strut size
+ % correspondingly.  There is no deep meaning behind these magic numbers
+ % used as factors; they just match (closely enough) what Knuth defined.
+ %
+ \def\lineskipfactor{.08333}
+ \def\strutheightpercent{.70833}
+ \def\strutdepthpercent {.29167}
+ %
+ % can get a sort of poor man's double spacing by redefining this.
+ \def\baselinefactor{1}
+ %
+ \newdimen\textleading
+ \def\setleading#1{%
+   \dimen0 = #1\relax
+   \normalbaselineskip = \baselinefactor\dimen0
+   \normallineskip = \lineskipfactor\normalbaselineskip
+   \normalbaselines
+   \setbox\strutbox =\hbox{%
+     \vrule width0pt height\strutheightpercent\baselineskip
+                     depth \strutdepthpercent \baselineskip
+   }%
+ }
+ 
+ % PDF CMaps.  See also LaTeX's t1.cmap.
+ %
+ % do nothing with this by default.
+ \expandafter\let\csname cmapOT1\endcsname\gobble
+ \expandafter\let\csname cmapOT1IT\endcsname\gobble
+ \expandafter\let\csname cmapOT1TT\endcsname\gobble
+ 
+ % if we are producing pdf, and we have \pdffontattr, then define cmaps.
+ % (\pdffontattr was introduced many years ago, but people still run
+ % older pdftex's; it's easy to conditionalize, so we do.)
+ \ifpdf \ifx\pdffontattr\thisisundefined \else
+   \begingroup
+     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+ %%DocumentNeededResources: ProcSet (CIDInit)
+ %%IncludeResource: ProcSet (CIDInit)
+ %%BeginResource: CMap (TeX-OT1-0)
+ %%Title: (TeX-OT1-0 TeX OT1 0)
+ %%Version: 1.000
+ %%EndComments
+ /CIDInit /ProcSet findresource begin
+ 12 dict begin
+ begincmap
+ /CIDSystemInfo
+ << /Registry (TeX)
+ /Ordering (OT1)
+ /Supplement 0
+ >> def
+ /CMapName /TeX-OT1-0 def
+ /CMapType 2 def
+ 1 begincodespacerange
+ <00> <7F>
+ endcodespacerange
+ 8 beginbfrange
+ <00> <01> <0393>
+ <09> <0A> <03A8>
+ <23> <26> <0023>
+ <28> <3B> <0028>
+ <3F> <5B> <003F>
+ <5D> <5E> <005D>
+ <61> <7A> <0061>
+ <7B> <7C> <2013>
+ endbfrange
+ 40 beginbfchar
+ <02> <0398>
+ <03> <039B>
+ <04> <039E>
+ <05> <03A0>
+ <06> <03A3>
+ <07> <03D2>
+ <08> <03A6>
+ <0B> <00660066>
+ <0C> <00660069>
+ <0D> <0066006C>
+ <0E> <006600660069>
+ <0F> <00660066006C>
+ <10> <0131>
+ <11> <0237>
+ <12> <0060>
+ <13> <00B4>
+ <14> <02C7>
+ <15> <02D8>
+ <16> <00AF>
+ <17> <02DA>
+ <18> <00B8>
+ <19> <00DF>
+ <1A> <00E6>
+ <1B> <0153>
+ <1C> <00F8>
+ <1D> <00C6>
+ <1E> <0152>
+ <1F> <00D8>
+ <21> <0021>
+ <22> <201D>
+ <27> <2019>
+ <3C> <00A1>
+ <3D> <003D>
+ <3E> <00BF>
+ <5C> <201C>
+ <5F> <02D9>
+ <60> <2018>
+ <7D> <02DD>
+ <7E> <007E>
+ <7F> <00A8>
+ endbfchar
+ endcmap
+ CMapName currentdict /CMap defineresource pop
+ end
+ end
+ %%EndResource
+ %%EOF
+     }\endgroup
+   \expandafter\edef\csname cmapOT1\endcsname#1{%
+     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+   }%
+ %
+ % \cmapOT1IT
+   \begingroup
+     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+ %%DocumentNeededResources: ProcSet (CIDInit)
+ %%IncludeResource: ProcSet (CIDInit)
+ %%BeginResource: CMap (TeX-OT1IT-0)
+ %%Title: (TeX-OT1IT-0 TeX OT1IT 0)
+ %%Version: 1.000
+ %%EndComments
+ /CIDInit /ProcSet findresource begin
+ 12 dict begin
+ begincmap
+ /CIDSystemInfo
+ << /Registry (TeX)
+ /Ordering (OT1IT)
+ /Supplement 0
+ >> def
+ /CMapName /TeX-OT1IT-0 def
+ /CMapType 2 def
+ 1 begincodespacerange
+ <00> <7F>
+ endcodespacerange
+ 8 beginbfrange
+ <00> <01> <0393>
+ <09> <0A> <03A8>
+ <25> <26> <0025>
+ <28> <3B> <0028>
+ <3F> <5B> <003F>
+ <5D> <5E> <005D>
+ <61> <7A> <0061>
+ <7B> <7C> <2013>
+ endbfrange
+ 42 beginbfchar
+ <02> <0398>
+ <03> <039B>
+ <04> <039E>
+ <05> <03A0>
+ <06> <03A3>
+ <07> <03D2>
+ <08> <03A6>
+ <0B> <00660066>
+ <0C> <00660069>
+ <0D> <0066006C>
+ <0E> <006600660069>
+ <0F> <00660066006C>
+ <10> <0131>
+ <11> <0237>
+ <12> <0060>
+ <13> <00B4>
+ <14> <02C7>
+ <15> <02D8>
+ <16> <00AF>
+ <17> <02DA>
+ <18> <00B8>
+ <19> <00DF>
+ <1A> <00E6>
+ <1B> <0153>
+ <1C> <00F8>
+ <1D> <00C6>
+ <1E> <0152>
+ <1F> <00D8>
+ <21> <0021>
+ <22> <201D>
+ <23> <0023>
+ <24> <00A3>
+ <27> <2019>
+ <3C> <00A1>
+ <3D> <003D>
+ <3E> <00BF>
+ <5C> <201C>
+ <5F> <02D9>
+ <60> <2018>
+ <7D> <02DD>
+ <7E> <007E>
+ <7F> <00A8>
+ endbfchar
+ endcmap
+ CMapName currentdict /CMap defineresource pop
+ end
+ end
+ %%EndResource
+ %%EOF
+     }\endgroup
+   \expandafter\edef\csname cmapOT1IT\endcsname#1{%
+     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+   }%
+ %
+ % \cmapOT1TT
+   \begingroup
+     \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+     \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+ %%DocumentNeededResources: ProcSet (CIDInit)
+ %%IncludeResource: ProcSet (CIDInit)
+ %%BeginResource: CMap (TeX-OT1TT-0)
+ %%Title: (TeX-OT1TT-0 TeX OT1TT 0)
+ %%Version: 1.000
+ %%EndComments
+ /CIDInit /ProcSet findresource begin
+ 12 dict begin
+ begincmap
+ /CIDSystemInfo
+ << /Registry (TeX)
+ /Ordering (OT1TT)
+ /Supplement 0
+ >> def
+ /CMapName /TeX-OT1TT-0 def
+ /CMapType 2 def
+ 1 begincodespacerange
+ <00> <7F>
+ endcodespacerange
+ 5 beginbfrange
+ <00> <01> <0393>
+ <09> <0A> <03A8>
+ <21> <26> <0021>
+ <28> <5F> <0028>
+ <61> <7E> <0061>
+ endbfrange
+ 32 beginbfchar
+ <02> <0398>
+ <03> <039B>
+ <04> <039E>
+ <05> <03A0>
+ <06> <03A3>
+ <07> <03D2>
+ <08> <03A6>
+ <0B> <2191>
+ <0C> <2193>
+ <0D> <0027>
+ <0E> <00A1>
+ <0F> <00BF>
+ <10> <0131>
+ <11> <0237>
+ <12> <0060>
+ <13> <00B4>
+ <14> <02C7>
+ <15> <02D8>
+ <16> <00AF>
+ <17> <02DA>
+ <18> <00B8>
+ <19> <00DF>
+ <1A> <00E6>
+ <1B> <0153>
+ <1C> <00F8>
+ <1D> <00C6>
+ <1E> <0152>
+ <1F> <00D8>
+ <20> <2423>
+ <27> <2019>
+ <60> <2018>
+ <7F> <00A8>
+ endbfchar
+ endcmap
+ CMapName currentdict /CMap defineresource pop
+ end
+ end
+ %%EndResource
+ %%EOF
+     }\endgroup
+   \expandafter\edef\csname cmapOT1TT\endcsname#1{%
+     \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+   }%
+ \fi\fi
+ 
+ 
+ % Set the font macro #1 to the font named \fontprefix#2.
+ % #3 is the font's design size, #4 is a scale factor, #5 is the CMap
+ % encoding (only OT1, OT1IT and OT1TT are allowed, or empty to omit).
+ % Example:
+ % #1 = \textrm
+ % #2 = \rmshape
+ % #3 = 10
+ % #4 = \mainmagstep
+ % #5 = OT1
+ %
+ \def\setfont#1#2#3#4#5{%
+   \font#1=\fontprefix#2#3 scaled #4
+   \csname cmap#5\endcsname#1%
+ }
+ % This is what gets called when #5 of \setfont is empty.
+ \let\cmap\gobble
+ %
+ % (end of cmaps)
+ 
+ % Use cm as the default font prefix.
+ % To specify the font prefix, you must define \fontprefix
+ % before you read in texinfo.tex.
+ \ifx\fontprefix\thisisundefined
+ \def\fontprefix{cm}
+ \fi
+ % Support font families that don't use the same naming scheme as CM.
+ \def\rmshape{r}
+ \def\rmbshape{bx}               % where the normal face is bold
+ \def\bfshape{b}
+ \def\bxshape{bx}
+ \def\ttshape{tt}
+ \def\ttbshape{tt}
+ \def\ttslshape{sltt}
+ \def\itshape{ti}
+ \def\itbshape{bxti}
+ \def\slshape{sl}
+ \def\slbshape{bxsl}
+ \def\sfshape{ss}
+ \def\sfbshape{ss}
+ \def\scshape{csc}
+ \def\scbshape{csc}
+ 
+ % Definitions for a main text size of 11pt.  (The default in Texinfo.)
+ %
+ \def\definetextfontsizexi{%
+ % Text fonts (11.2pt, magstep1).
+ \def\textnominalsize{11pt}
+ \edef\mainmagstep{\magstephalf}
+ \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+ \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+ \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+ \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+ \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+ \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+ \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+ \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+ \font\texti=cmmi10 scaled \mainmagstep
+ \font\textsy=cmsy10 scaled \mainmagstep
+ \def\textecsize{1095}
+ 
+ % A few fonts for @defun names and args.
+ \setfont\defbf\bfshape{10}{\magstep1}{OT1}
+ \setfont\deftt\ttshape{10}{\magstep1}{OT1TT}
+ \setfont\defttsl\ttslshape{10}{\magstep1}{OT1TT}
+ \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
+ 
+ % Fonts for indices, footnotes, small examples (9pt).
+ \def\smallnominalsize{9pt}
+ \setfont\smallrm\rmshape{9}{1000}{OT1}
+ \setfont\smalltt\ttshape{9}{1000}{OT1TT}
+ \setfont\smallbf\bfshape{10}{900}{OT1}
+ \setfont\smallit\itshape{9}{1000}{OT1IT}
+ \setfont\smallsl\slshape{9}{1000}{OT1}
+ \setfont\smallsf\sfshape{9}{1000}{OT1}
+ \setfont\smallsc\scshape{10}{900}{OT1}
+ \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+ \font\smalli=cmmi9
+ \font\smallsy=cmsy9
+ \def\smallecsize{0900}
+ 
+ % Fonts for small examples (8pt).
+ \def\smallernominalsize{8pt}
+ \setfont\smallerrm\rmshape{8}{1000}{OT1}
+ \setfont\smallertt\ttshape{8}{1000}{OT1TT}
+ \setfont\smallerbf\bfshape{10}{800}{OT1}
+ \setfont\smallerit\itshape{8}{1000}{OT1IT}
+ \setfont\smallersl\slshape{8}{1000}{OT1}
+ \setfont\smallersf\sfshape{8}{1000}{OT1}
+ \setfont\smallersc\scshape{10}{800}{OT1}
+ \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+ \font\smalleri=cmmi8
+ \font\smallersy=cmsy8
+ \def\smallerecsize{0800}
+ 
+ % Fonts for title page (20.4pt):
+ \def\titlenominalsize{20pt}
+ \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+ \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+ \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+ \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+ \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+ \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+ \let\titlebf=\titlerm
+ \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+ \font\titlei=cmmi12 scaled \magstep3
+ \font\titlesy=cmsy10 scaled \magstep4
+ \def\titleecsize{2074}
+ 
+ % Chapter (and unnumbered) fonts (17.28pt).
+ \def\chapnominalsize{17pt}
+ \setfont\chaprm\rmbshape{12}{\magstep2}{OT1}
+ \setfont\chapit\itbshape{10}{\magstep3}{OT1IT}
+ \setfont\chapsl\slbshape{10}{\magstep3}{OT1}
+ \setfont\chaptt\ttbshape{12}{\magstep2}{OT1TT}
+ \setfont\chapttsl\ttslshape{10}{\magstep3}{OT1TT}
+ \setfont\chapsf\sfbshape{17}{1000}{OT1}
+ \let\chapbf=\chaprm
+ \setfont\chapsc\scbshape{10}{\magstep3}{OT1}
+ \font\chapi=cmmi12 scaled \magstep2
+ \font\chapsy=cmsy10 scaled \magstep3
+ \def\chapecsize{1728}
+ 
+ % Section fonts (14.4pt).
+ \def\secnominalsize{14pt}
+ \setfont\secrm\rmbshape{12}{\magstep1}{OT1}
+ \setfont\secit\itbshape{10}{\magstep2}{OT1IT}
+ \setfont\secsl\slbshape{10}{\magstep2}{OT1}
+ \setfont\sectt\ttbshape{12}{\magstep1}{OT1TT}
+ \setfont\secttsl\ttslshape{10}{\magstep2}{OT1TT}
+ \setfont\secsf\sfbshape{12}{\magstep1}{OT1}
+ \let\secbf\secrm
+ \setfont\secsc\scbshape{10}{\magstep2}{OT1}
+ \font\seci=cmmi12 scaled \magstep1
+ \font\secsy=cmsy10 scaled \magstep2
+ \def\sececsize{1440}
+ 
+ % Subsection fonts (13.15pt).
+ \def\ssecnominalsize{13pt}
+ \setfont\ssecrm\rmbshape{12}{\magstephalf}{OT1}
+ \setfont\ssecit\itbshape{10}{1315}{OT1IT}
+ \setfont\ssecsl\slbshape{10}{1315}{OT1}
+ \setfont\ssectt\ttbshape{12}{\magstephalf}{OT1TT}
+ \setfont\ssecttsl\ttslshape{10}{1315}{OT1TT}
+ \setfont\ssecsf\sfbshape{12}{\magstephalf}{OT1}
+ \let\ssecbf\ssecrm
+ \setfont\ssecsc\scbshape{10}{1315}{OT1}
+ \font\sseci=cmmi12 scaled \magstephalf
+ \font\ssecsy=cmsy10 scaled 1315
+ \def\ssececsize{1200}
+ 
+ % Reduced fonts for @acro in text (10pt).
+ \def\reducednominalsize{10pt}
+ \setfont\reducedrm\rmshape{10}{1000}{OT1}
+ \setfont\reducedtt\ttshape{10}{1000}{OT1TT}
+ \setfont\reducedbf\bfshape{10}{1000}{OT1}
+ \setfont\reducedit\itshape{10}{1000}{OT1IT}
+ \setfont\reducedsl\slshape{10}{1000}{OT1}
+ \setfont\reducedsf\sfshape{10}{1000}{OT1}
+ \setfont\reducedsc\scshape{10}{1000}{OT1}
+ \setfont\reducedttsl\ttslshape{10}{1000}{OT1TT}
+ \font\reducedi=cmmi10
+ \font\reducedsy=cmsy10
+ \def\reducedecsize{1000}
+ 
+ \textleading = 13.2pt % line spacing for 11pt CM
+ \textfonts            % reset the current fonts
+ \rm
+ } % end of 11pt text font size definitions, \definetextfontsizexi
+ 
+ 
+ % Definitions to make the main text be 10pt Computer Modern, with
+ % section, chapter, etc., sizes following suit.  This is for the GNU
+ % Press printing of the Emacs 22 manual.  Maybe other manuals in the
+ % future.  Used with @smallbook, which sets the leading to 12pt.
+ %
+ \def\definetextfontsizex{%
+ % Text fonts (10pt).
+ \def\textnominalsize{10pt}
+ \edef\mainmagstep{1000}
+ \setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+ \setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+ \setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+ \setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+ \setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+ \setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+ \setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+ \setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+ \font\texti=cmmi10 scaled \mainmagstep
+ \font\textsy=cmsy10 scaled \mainmagstep
+ \def\textecsize{1000}
+ 
+ % A few fonts for @defun names and args.
+ \setfont\defbf\bfshape{10}{\magstephalf}{OT1}
+ \setfont\deftt\ttshape{10}{\magstephalf}{OT1TT}
+ \setfont\defttsl\ttslshape{10}{\magstephalf}{OT1TT}
+ \def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
+ 
+ % Fonts for indices, footnotes, small examples (9pt).
+ \def\smallnominalsize{9pt}
+ \setfont\smallrm\rmshape{9}{1000}{OT1}
+ \setfont\smalltt\ttshape{9}{1000}{OT1TT}
+ \setfont\smallbf\bfshape{10}{900}{OT1}
+ \setfont\smallit\itshape{9}{1000}{OT1IT}
+ \setfont\smallsl\slshape{9}{1000}{OT1}
+ \setfont\smallsf\sfshape{9}{1000}{OT1}
+ \setfont\smallsc\scshape{10}{900}{OT1}
+ \setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+ \font\smalli=cmmi9
+ \font\smallsy=cmsy9
+ \def\smallecsize{0900}
+ 
+ % Fonts for small examples (8pt).
+ \def\smallernominalsize{8pt}
+ \setfont\smallerrm\rmshape{8}{1000}{OT1}
+ \setfont\smallertt\ttshape{8}{1000}{OT1TT}
+ \setfont\smallerbf\bfshape{10}{800}{OT1}
+ \setfont\smallerit\itshape{8}{1000}{OT1IT}
+ \setfont\smallersl\slshape{8}{1000}{OT1}
+ \setfont\smallersf\sfshape{8}{1000}{OT1}
+ \setfont\smallersc\scshape{10}{800}{OT1}
+ \setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+ \font\smalleri=cmmi8
+ \font\smallersy=cmsy8
+ \def\smallerecsize{0800}
+ 
+ % Fonts for title page (20.4pt):
+ \def\titlenominalsize{20pt}
+ \setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+ \setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+ \setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+ \setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+ \setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+ \setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+ \let\titlebf=\titlerm
+ \setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+ \font\titlei=cmmi12 scaled \magstep3
+ \font\titlesy=cmsy10 scaled \magstep4
+ \def\titleecsize{2074}
+ 
+ % Chapter fonts (14.4pt).
+ \def\chapnominalsize{14pt}
+ \setfont\chaprm\rmbshape{12}{\magstep1}{OT1}
+ \setfont\chapit\itbshape{10}{\magstep2}{OT1IT}
+ \setfont\chapsl\slbshape{10}{\magstep2}{OT1}
+ \setfont\chaptt\ttbshape{12}{\magstep1}{OT1TT}
+ \setfont\chapttsl\ttslshape{10}{\magstep2}{OT1TT}
+ \setfont\chapsf\sfbshape{12}{\magstep1}{OT1}
+ \let\chapbf\chaprm
+ \setfont\chapsc\scbshape{10}{\magstep2}{OT1}
+ \font\chapi=cmmi12 scaled \magstep1
+ \font\chapsy=cmsy10 scaled \magstep2
+ \def\chapecsize{1440}
+ 
+ % Section fonts (12pt).
+ \def\secnominalsize{12pt}
+ \setfont\secrm\rmbshape{12}{1000}{OT1}
+ \setfont\secit\itbshape{10}{\magstep1}{OT1IT}
+ \setfont\secsl\slbshape{10}{\magstep1}{OT1}
+ \setfont\sectt\ttbshape{12}{1000}{OT1TT}
+ \setfont\secttsl\ttslshape{10}{\magstep1}{OT1TT}
+ \setfont\secsf\sfbshape{12}{1000}{OT1}
+ \let\secbf\secrm
+ \setfont\secsc\scbshape{10}{\magstep1}{OT1}
+ \font\seci=cmmi12
+ \font\secsy=cmsy10 scaled \magstep1
+ \def\sececsize{1200}
+ 
+ % Subsection fonts (10pt).
+ \def\ssecnominalsize{10pt}
+ \setfont\ssecrm\rmbshape{10}{1000}{OT1}
+ \setfont\ssecit\itbshape{10}{1000}{OT1IT}
+ \setfont\ssecsl\slbshape{10}{1000}{OT1}
+ \setfont\ssectt\ttbshape{10}{1000}{OT1TT}
+ \setfont\ssecttsl\ttslshape{10}{1000}{OT1TT}
+ \setfont\ssecsf\sfbshape{10}{1000}{OT1}
+ \let\ssecbf\ssecrm
+ \setfont\ssecsc\scbshape{10}{1000}{OT1}
+ \font\sseci=cmmi10
+ \font\ssecsy=cmsy10
+ \def\ssececsize{1000}
+ 
+ % Reduced fonts for @acro in text (9pt).
+ \def\reducednominalsize{9pt}
+ \setfont\reducedrm\rmshape{9}{1000}{OT1}
+ \setfont\reducedtt\ttshape{9}{1000}{OT1TT}
+ \setfont\reducedbf\bfshape{10}{900}{OT1}
+ \setfont\reducedit\itshape{9}{1000}{OT1IT}
+ \setfont\reducedsl\slshape{9}{1000}{OT1}
+ \setfont\reducedsf\sfshape{9}{1000}{OT1}
+ \setfont\reducedsc\scshape{10}{900}{OT1}
+ \setfont\reducedttsl\ttslshape{10}{900}{OT1TT}
+ \font\reducedi=cmmi9
+ \font\reducedsy=cmsy9
+ \def\reducedecsize{0900}
+ 
+ \divide\parskip by 2  % reduce space between paragraphs
+ \textleading = 12pt   % line spacing for 10pt CM
+ \textfonts            % reset the current fonts
+ \rm
+ } % end of 10pt text font size definitions, \definetextfontsizex
+ 
+ 
+ % We provide the user-level command
+ %   @fonttextsize 10
+ % (or 11) to redefine the text font size.  pt is assumed.
+ %
+ \def\xiword{11}
+ \def\xword{10}
+ \def\xwordpt{10pt}
+ %
+ \parseargdef\fonttextsize{%
+   \def\textsizearg{#1}%
+   %\wlog{doing @fonttextsize \textsizearg}%
+   %
+   % Set \globaldefs so that documents can use this inside @tex, since
+   % makeinfo 4.8 does not support it, but we need it nonetheless.
+   %
+  \begingroup \globaldefs=1
+   \ifx\textsizearg\xword \definetextfontsizex
+   \else \ifx\textsizearg\xiword \definetextfontsizexi
+   \else
+     \errhelp=\EMsimple
+     \errmessage{@fonttextsize only supports `10' or `11', not `\textsizearg'}
+   \fi\fi
+  \endgroup
+ }
+ 
+ 
+ % In order for the font changes to affect most math symbols and letters,
+ % we have to define the \textfont of the standard families.  Since
+ % texinfo doesn't allow for producing subscripts and superscripts except
+ % in the main text, we don't bother to reset \scriptfont and
+ % \scriptscriptfont (which would also require loading a lot more fonts).
+ %
+ \def\resetmathfonts{%
+   \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
+   \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
+   \textfont\ttfam=\tentt \textfont\sffam=\tensf
+ }
+ 
+ % The font-changing commands redefine the meanings of \tenSTYLE, instead
+ % of just \STYLE.  We do this because \STYLE needs to also set the
+ % current \fam for math mode.  Our \STYLE (e.g., \rm) commands hardwire
+ % \tenSTYLE to set the current font.
+ %
+ % Each font-changing command also sets the names \lsize (one size lower)
+ % and \lllsize (three sizes lower).  These relative commands are used in
+ % the LaTeX logo and acronyms.
+ %
+ % This all needs generalizing, badly.
+ %
+ \def\textfonts{%
+   \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
+   \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
+   \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
+   \let\tenttsl=\textttsl
+   \def\curfontsize{text}%
+   \def\lsize{reduced}\def\lllsize{smaller}%
+   \resetmathfonts \setleading{\textleading}}
+ \def\titlefonts{%
+   \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
+   \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
+   \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
+   \let\tenttsl=\titlettsl
+   \def\curfontsize{title}%
+   \def\lsize{chap}\def\lllsize{subsec}%
+   \resetmathfonts \setleading{27pt}}
+ \def\titlefont#1{{\titlefonts\rmisbold #1}}
+ \def\chapfonts{%
+   \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
+   \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
+   \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
+   \let\tenttsl=\chapttsl
+   \def\curfontsize{chap}%
+   \def\lsize{sec}\def\lllsize{text}%
+   \resetmathfonts \setleading{19pt}}
+ \def\secfonts{%
+   \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
+   \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
+   \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
+   \let\tenttsl=\secttsl
+   \def\curfontsize{sec}%
+   \def\lsize{subsec}\def\lllsize{reduced}%
+   \resetmathfonts \setleading{16pt}}
+ \def\subsecfonts{%
+   \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
+   \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
+   \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
+   \let\tenttsl=\ssecttsl
+   \def\curfontsize{ssec}%
+   \def\lsize{text}\def\lllsize{small}%
+   \resetmathfonts \setleading{15pt}}
+ \let\subsubsecfonts = \subsecfonts
+ \def\reducedfonts{%
+   \let\tenrm=\reducedrm \let\tenit=\reducedit \let\tensl=\reducedsl
+   \let\tenbf=\reducedbf \let\tentt=\reducedtt \let\reducedcaps=\reducedsc
+   \let\tensf=\reducedsf \let\teni=\reducedi \let\tensy=\reducedsy
+   \let\tenttsl=\reducedttsl
+   \def\curfontsize{reduced}%
+   \def\lsize{small}\def\lllsize{smaller}%
+   \resetmathfonts \setleading{10.5pt}}
+ \def\smallfonts{%
+   \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
+   \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
+   \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
+   \let\tenttsl=\smallttsl
+   \def\curfontsize{small}%
+   \def\lsize{smaller}\def\lllsize{smaller}%
+   \resetmathfonts \setleading{10.5pt}}
+ \def\smallerfonts{%
+   \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
+   \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
+   \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
+   \let\tenttsl=\smallerttsl
+   \def\curfontsize{smaller}%
+   \def\lsize{smaller}\def\lllsize{smaller}%
+   \resetmathfonts \setleading{9.5pt}}
+ 
+ % Fonts for short table of contents.
+ \setfont\shortcontrm\rmshape{12}{1000}{OT1}
+ \setfont\shortcontbf\bfshape{10}{\magstep1}{OT1}  % no cmb12
+ \setfont\shortcontsl\slshape{12}{1000}{OT1}
+ \setfont\shortconttt\ttshape{12}{1000}{OT1TT}
+ 
+ % Define these just so they can be easily changed for other fonts.
+ \def\angleleft{$\langle$}
+ \def\angleright{$\rangle$}
+ 
+ % Set the fonts to use with the @small... environments.
+ \let\smallexamplefonts = \smallfonts
+ 
+ % About \smallexamplefonts.  If we use \smallfonts (9pt), @smallexample
+ % can fit this many characters:
+ %   8.5x11=86   smallbook=72  a4=90  a5=69
+ % If we use \scriptfonts (8pt), then we can fit this many characters:
+ %   8.5x11=90+  smallbook=80  a4=90+  a5=77
+ % For me, subjectively, the few extra characters that fit aren't worth
+ % the additional smallness of 8pt.  So I'm making the default 9pt.
+ %
+ % By the way, for comparison, here's what fits with @example (10pt):
+ %   8.5x11=71  smallbook=60  a4=75  a5=58
+ % --karl, 24jan03.
+ 
+ % Set up the default fonts, so we can use them for creating boxes.
+ %
+ \definetextfontsizexi
+ 
+ 
+ \message{markup,}
+ 
+ % Check if we are currently using a typewriter font.  Since all the
+ % Computer Modern typewriter fonts have zero interword stretch (and
+ % shrink), and it is reasonable to expect all typewriter fonts to have
+ % this property, we can check that font parameter.
+ %
+ \def\ifmonospace{\ifdim\fontdimen3\font=0pt }
+ 
+ % Markup style infrastructure.  \defmarkupstylesetup\INITMACRO will
+ % define and register \INITMACRO to be called on markup style changes.
+ % \INITMACRO can check \currentmarkupstyle for the innermost
+ % style and the set of \ifmarkupSTYLE switches for all styles
+ % currently in effect.
+ \newif\ifmarkupvar
+ \newif\ifmarkupsamp
+ \newif\ifmarkupkey
+ %\newif\ifmarkupfile % @file == @samp.
+ %\newif\ifmarkupoption % @option == @samp.
+ \newif\ifmarkupcode
+ \newif\ifmarkupkbd
+ %\newif\ifmarkupenv % @env == @code.
+ %\newif\ifmarkupcommand % @command == @code.
+ \newif\ifmarkuptex % @tex (and part of @math, for now).
+ \newif\ifmarkupexample
+ \newif\ifmarkupverb
+ \newif\ifmarkupverbatim
+ 
+ \let\currentmarkupstyle\empty
+ 
+ \def\setupmarkupstyle#1{%
+   \csname markup#1true\endcsname
+   \def\currentmarkupstyle{#1}%
+   \markupstylesetup
+ }
+ 
+ \let\markupstylesetup\empty
+ 
+ \def\defmarkupstylesetup#1{%
+   \expandafter\def\expandafter\markupstylesetup
+     \expandafter{\markupstylesetup #1}%
+   \def#1%
+ }
+ 
+ % Markup style setup for left and right quotes.
+ \defmarkupstylesetup\markupsetuplq{%
+   \expandafter\let\expandafter \temp
+     \csname markupsetuplq\currentmarkupstyle\endcsname
+   \ifx\temp\relax \markupsetuplqdefault \else \temp \fi
+ }
+ 
+ \defmarkupstylesetup\markupsetuprq{%
+   \expandafter\let\expandafter \temp
+     \csname markupsetuprq\currentmarkupstyle\endcsname
+   \ifx\temp\relax \markupsetuprqdefault \else \temp \fi
+ }
+ 
+ {
+ \catcode`\'=\active
+ \catcode`\`=\active
+ 
+ \gdef\markupsetuplqdefault{\let`\lq}
+ \gdef\markupsetuprqdefault{\let'\rq}
+ 
+ \gdef\markupsetcodequoteleft{\let`\codequoteleft}
+ \gdef\markupsetcodequoteright{\let'\codequoteright}
+ }
+ 
+ \let\markupsetuplqcode \markupsetcodequoteleft
+ \let\markupsetuprqcode \markupsetcodequoteright
+ %
+ \let\markupsetuplqexample \markupsetcodequoteleft
+ \let\markupsetuprqexample \markupsetcodequoteright
+ %
+ \let\markupsetuplqkbd     \markupsetcodequoteleft
+ \let\markupsetuprqkbd     \markupsetcodequoteright
+ %
+ \let\markupsetuplqsamp \markupsetcodequoteleft
+ \let\markupsetuprqsamp \markupsetcodequoteright
+ %
+ \let\markupsetuplqverb \markupsetcodequoteleft
+ \let\markupsetuprqverb \markupsetcodequoteright
+ %
+ \let\markupsetuplqverbatim \markupsetcodequoteleft
+ \let\markupsetuprqverbatim \markupsetcodequoteright
+ 
+ % Allow an option to not use regular directed right quote/apostrophe
+ % (char 0x27), but instead the undirected quote from cmtt (char 0x0d).
+ % The undirected quote is ugly, so don't make it the default, but it
+ % works for pasting with more pdf viewers (at least evince), the
+ % lilypond developers report.  xpdf does work with the regular 0x27.
+ %
+ \def\codequoteright{%
+   \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
+     \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
+       '%
+     \else \char'15 \fi
+   \else \char'15 \fi
+ }
+ %
+ % and a similar option for the left quote char vs. a grave accent.
+ % Modern fonts display ASCII 0x60 as a grave accent, so some people like
+ % the code environments to do likewise.
+ %
+ \def\codequoteleft{%
+   \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
+     \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
+       % [Knuth] pp. 380,381,391
+       % \relax disables Spanish ligatures ?` and !` of \tt font.
+       \relax`%
+     \else \char'22 \fi
+   \else \char'22 \fi
+ }
+ 
+ % Commands to set the quote options.
+ % 
+ \parseargdef\codequoteundirected{%
+   \def\temp{#1}%
+   \ifx\temp\onword
+     \expandafter\let\csname SETtxicodequoteundirected\endcsname
+       = t%
+   \else\ifx\temp\offword
+     \expandafter\let\csname SETtxicodequoteundirected\endcsname
+       = \relax
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @codequoteundirected value `\temp', must be on|off}%
+   \fi\fi
+ }
+ %
+ \parseargdef\codequotebacktick{%
+   \def\temp{#1}%
+   \ifx\temp\onword
+     \expandafter\let\csname SETtxicodequotebacktick\endcsname
+       = t%
+   \else\ifx\temp\offword
+     \expandafter\let\csname SETtxicodequotebacktick\endcsname
+       = \relax
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @codequotebacktick value `\temp', must be on|off}%
+   \fi\fi
+ }
+ 
+ % [Knuth] pp. 380,381,391, disable Spanish ligatures ?` and !` of \tt font.
+ \def\noligaturesquoteleft{\relax\lq}
+ 
+ % Count depth in font-changes, for error checks
+ \newcount\fontdepth \fontdepth=0
+ 
+ % Font commands.
+ 
+ % #1 is the font command (\sl or \it), #2 is the text to slant.
+ % If we are in a monospaced environment, however, 1) always use \ttsl,
+ % and 2) do not add an italic correction.
+ \def\dosmartslant#1#2{%
+   \ifusingtt 
+     {{\ttsl #2}\let\next=\relax}%
+     {\def\next{{#1#2}\futurelet\next\smartitaliccorrection}}%
+   \next
+ }
+ \def\smartslanted{\dosmartslant\sl}
+ \def\smartitalic{\dosmartslant\it}
+ 
+ % Output an italic correction unless \next (presumed to be the following
+ % character) is such as not to need one.
+ \def\smartitaliccorrection{%
+   \ifx\next,%
+   \else\ifx\next-%
+   \else\ifx\next.%
+   \else\ifx\next\.%
+   \else\ifx\next\comma%
+   \else\ptexslash
+   \fi\fi\fi\fi\fi
+   \aftersmartic
+ }
+ 
+ % Unconditional use \ttsl, and no ic.  @var is set to this for defuns.
+ \def\ttslanted#1{{\ttsl #1}}
+ 
+ % @cite is like \smartslanted except unconditionally use \sl.  We never want
+ % ttsl for book titles, do we?
+ \def\cite#1{{\sl #1}\futurelet\next\smartitaliccorrection}
+ 
+ \def\aftersmartic{}
+ \def\var#1{%
+   \let\saveaftersmartic = \aftersmartic
+   \def\aftersmartic{\null\let\aftersmartic=\saveaftersmartic}%
+   \smartslanted{#1}%
+ }
+ 
+ \let\i=\smartitalic
+ \let\slanted=\smartslanted
+ \let\dfn=\smartslanted
+ \let\emph=\smartitalic
+ 
+ % Explicit font changes: @r, @sc, undocumented @ii.
+ \def\r#1{{\rm #1}}              % roman font
+ \def\sc#1{{\smallcaps#1}}       % smallcaps font
+ \def\ii#1{{\it #1}}             % italic font
+ 
+ % @b, explicit bold.  Also @strong.
+ \def\b#1{{\bf #1}}
+ \let\strong=\b
+ 
+ % @sansserif, explicit sans.
+ \def\sansserif#1{{\sf #1}}
+ 
+ % We can't just use \exhyphenpenalty, because that only has effect at
+ % the end of a paragraph.  Restore normal hyphenation at the end of the
+ % group within which \nohyphenation is presumably called.
+ %
+ \def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
+ \def\restorehyphenation{\hyphenchar\font = `- }
+ 
+ % Set sfcode to normal for the chars that usually have another value.
+ % Can't use plain's \frenchspacing because it uses the `\x notation, and
+ % sometimes \x has an active definition that messes things up.
+ %
+ \catcode`@=11
+   \def\plainfrenchspacing{%
+     \sfcode\dotChar  =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
+     \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
+     \def\endofsentencespacefactor{1000}% for @. and friends
+   }
+   \def\plainnonfrenchspacing{%
+     \sfcode`\.3000\sfcode`\?3000\sfcode`\!3000
+     \sfcode`\:2000\sfcode`\;1500\sfcode`\,1250
+     \def\endofsentencespacefactor{3000}% for @. and friends
+   }
+ \catcode`@=\other
+ \def\endofsentencespacefactor{3000}% default
+ 
+ % @t, explicit typewriter.
+ \def\t#1{%
+   {\tt \rawbackslash \plainfrenchspacing #1}%
+   \null
+ }
+ 
+ % @samp.
+ \def\samp#1{{\setupmarkupstyle{samp}\lq\tclose{#1}\rq\null}}
+ 
+ % @indicateurl is \samp, that is, with quotes.
+ \let\indicateurl=\samp
+ 
+ % @code (and similar) prints in typewriter, but with spaces the same
+ % size as normal in the surrounding text, without hyphenation, etc.
+ % This is a subroutine for that.
+ \def\tclose#1{%
+   {%
+     % Change normal interword space to be same as for the current font.
+     \spaceskip = \fontdimen2\font
+     %
+     % Switch to typewriter.
+     \tt
+     %
+     % But `\ ' produces the large typewriter interword space.
+     \def\ {{\spaceskip = 0pt{} }}%
+     %
+     % Turn off hyphenation.
+     \nohyphenation
+     %
+     \rawbackslash
+     \plainfrenchspacing
+     #1%
+   }%
+   \null % reset spacefactor to 1000
+ }
+ 
+ % We *must* turn on hyphenation at `-' and `_' in @code.
+ % (But see \codedashfinish below.)
+ % Otherwise, it is too hard to avoid overfull hboxes
+ % in the Emacs manual, the Library manual, etc.
+ %
+ % Unfortunately, TeX uses one parameter (\hyphenchar) to control
+ % both hyphenation at - and hyphenation within words.
+ % We must therefore turn them both off (\tclose does that)
+ % and arrange explicitly to hyphenate at a dash. -- rms.
+ {
+   \catcode`\-=\active \catcode`\_=\active
+   \catcode`\'=\active \catcode`\`=\active
+   \global\let'=\rq \global\let`=\lq  % default definitions
+   %
+   \global\def\code{\begingroup
+     \setupmarkupstyle{code}%
+     % The following should really be moved into \setupmarkupstyle handlers.
+     \catcode\dashChar=\active  \catcode\underChar=\active
+     \ifallowcodebreaks
+      \let-\codedash
+      \let_\codeunder
+     \else
+      \let-\normaldash
+      \let_\realunder
+     \fi
+     % Given -foo (with a single dash), we do not want to allow a break
+     % after the hyphen.
+     \global\let\codedashprev=\codedash
+     %
+     \codex
+   }
+   %
+   \gdef\codedash{\futurelet\next\codedashfinish}
+   \gdef\codedashfinish{%
+     \normaldash % always output the dash character itself.
+     % 
+     % Now, output a discretionary to allow a line break, unless
+     % (a) the next character is a -, or
+     % (b) the preceding character is a -.
+     % E.g., given --posix, we do not want to allow a break after either -.
+     % Given --foo-bar, we do want to allow a break between the - and the b.
+     \ifx\next\codedash \else
+       \ifx\codedashprev\codedash 
+       \else \discretionary{}{}{}\fi
+     \fi
+     % we need the space after the = for the case when \next itself is a
+     % space token; it would get swallowed otherwise.  As in @code{- a}.
+     \global\let\codedashprev= \next
+   }
+ }
+ \def\normaldash{-}
+ %
+ \def\codex #1{\tclose{#1}\endgroup}
+ 
+ \def\codeunder{%
+   % this is all so @math{@code{var_name}+1} can work.  In math mode, _
+   % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
+   % will therefore expand the active definition of _, which is us
+   % (inside @code that is), therefore an endless loop.
+   \ifusingtt{\ifmmode
+                \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
+              \else\normalunderscore \fi
+              \discretionary{}{}{}}%
+             {\_}%
+ }
+ 
+ % An additional complication: the above will allow breaks after, e.g.,
+ % each of the four underscores in __typeof__.  This is bad.
+ % @allowcodebreaks provides a document-level way to turn breaking at -
+ % and _ on and off.
+ %
+ \newif\ifallowcodebreaks  \allowcodebreakstrue
+ 
+ \def\keywordtrue{true}
+ \def\keywordfalse{false}
+ 
+ \parseargdef\allowcodebreaks{%
+   \def\txiarg{#1}%
+   \ifx\txiarg\keywordtrue
+     \allowcodebreakstrue
+   \else\ifx\txiarg\keywordfalse
+     \allowcodebreaksfalse
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @allowcodebreaks option `\txiarg', must be true|false}%
+   \fi\fi
+ }
+ 
+ % For @command, @env, @file, @option quotes seem unnecessary,
+ % so use \code rather than \samp.
+ \let\command=\code
+ \let\env=\code
+ \let\file=\code
+ \let\option=\code
+ 
+ % @uref (abbreviation for `urlref') takes an optional (comma-separated)
+ % second argument specifying the text to display and an optional third
+ % arg as text to display instead of (rather than in addition to) the url
+ % itself.  First (mandatory) arg is the url.
+ % (This \urefnobreak definition isn't used now, leaving it for a while
+ % for comparison.)
+ \def\urefnobreak#1{\dourefnobreak #1,,,\finish}
+ \def\dourefnobreak#1,#2,#3,#4\finish{\begingroup
+   \unsepspaces
+   \pdfurl{#1}%
+   \setbox0 = \hbox{\ignorespaces #3}%
+   \ifdim\wd0 > 0pt
+     \unhbox0 % third arg given, show only that
+   \else
+     \setbox0 = \hbox{\ignorespaces #2}%
+     \ifdim\wd0 > 0pt
+       \ifpdf
+         \unhbox0             % PDF: 2nd arg given, show only it
+       \else
+         \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
+       \fi
+     \else
+       \code{#1}% only url given, so show it
+     \fi
+   \fi
+   \endlink
+ \endgroup}
+ 
+ % This \urefbreak definition is the active one.
+ \def\urefbreak{\begingroup \urefcatcodes \dourefbreak}
+ \let\uref=\urefbreak
+ \def\dourefbreak#1{\urefbreakfinish #1,,,\finish}
+ \def\urefbreakfinish#1,#2,#3,#4\finish{% doesn't work in @example
+   \unsepspaces
+   \pdfurl{#1}%
+   \setbox0 = \hbox{\ignorespaces #3}%
+   \ifdim\wd0 > 0pt
+     \unhbox0 % third arg given, show only that
+   \else
+     \setbox0 = \hbox{\ignorespaces #2}%
+     \ifdim\wd0 > 0pt
+       \ifpdf
+         \unhbox0             % PDF: 2nd arg given, show only it
+       \else
+         \unhbox0\ (\urefcode{#1})% DVI: 2nd arg given, show both it and url
+       \fi
+     \else
+       \urefcode{#1}% only url given, so show it
+     \fi
+   \fi
+   \endlink
+ \endgroup}
+ 
+ % Allow line breaks around only a few characters (only).
+ \def\urefcatcodes{%
+   \catcode\ampChar=\active   \catcode\dotChar=\active
+   \catcode\hashChar=\active  \catcode\questChar=\active
+   \catcode\slashChar=\active
+ }
+ {
+   \urefcatcodes
+   %
+   \global\def\urefcode{\begingroup
+     \setupmarkupstyle{code}%
+     \urefcatcodes
+     \let&\urefcodeamp
+     \let.\urefcodedot
+     \let#\urefcodehash
+     \let?\urefcodequest
+     \let/\urefcodeslash
+     \codex
+   }
+   %
+   % By default, they are just regular characters.
+   \global\def&{\normalamp}
+   \global\def.{\normaldot}
+   \global\def#{\normalhash}
+   \global\def?{\normalquest}
+   \global\def/{\normalslash}
+ }
+ 
+ % we put a little stretch before and after the breakable chars, to help
+ % line breaking of long url's.  The unequal skips make look better in
+ % cmtt at least, especially for dots.
+ \def\urefprestretch{\urefprebreak \hskip0pt plus.13em }
+ \def\urefpoststretch{\urefpostbreak \hskip0pt plus.1em }
+ %
+ \def\urefcodeamp{\urefprestretch \&\urefpoststretch}
+ \def\urefcodedot{\urefprestretch .\urefpoststretch}
+ \def\urefcodehash{\urefprestretch \#\urefpoststretch}
+ \def\urefcodequest{\urefprestretch ?\urefpoststretch}
+ \def\urefcodeslash{\futurelet\next\urefcodeslashfinish}
+ {
+   \catcode`\/=\active
+   \global\def\urefcodeslashfinish{%
+     \urefprestretch \slashChar
+     % Allow line break only after the final / in a sequence of
+     % slashes, to avoid line break between the slashes in http://.
+     \ifx\next/\else \urefpoststretch \fi
+   }
+ }
+ 
+ % One more complication: by default we'll break after the special
+ % characters, but some people like to break before the special chars, so
+ % allow that.  Also allow no breaking at all, for manual control.
+ % 
+ \parseargdef\urefbreakstyle{%
+   \def\txiarg{#1}%
+   \ifx\txiarg\wordnone
+     \def\urefprebreak{\nobreak}\def\urefpostbreak{\nobreak}
+   \else\ifx\txiarg\wordbefore
+     \def\urefprebreak{\allowbreak}\def\urefpostbreak{\nobreak}
+   \else\ifx\txiarg\wordafter
+     \def\urefprebreak{\nobreak}\def\urefpostbreak{\allowbreak}
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @urefbreakstyle setting `\txiarg'}%
+   \fi\fi\fi
+ }
+ \def\wordafter{after}
+ \def\wordbefore{before}
+ \def\wordnone{none}
+ 
+ \urefbreakstyle after
+ 
+ % @url synonym for @uref, since that's how everyone uses it.
+ %
+ \let\url=\uref
+ 
+ % rms does not like angle brackets --karl, 17may97.
+ % So now @email is just like @uref, unless we are pdf.
+ %
+ %\def\email#1{\angleleft{\tt #1}\angleright}
+ \ifpdf
+   \def\email#1{\doemail#1,,\finish}
+   \def\doemail#1,#2,#3\finish{\begingroup
+     \unsepspaces
+     \pdfurl{mailto:#1}%
+     \setbox0 = \hbox{\ignorespaces #2}%
+     \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
+     \endlink
+   \endgroup}
+ \else
+   \let\email=\uref
+ \fi
+ 
+ % @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
+ %   `example' (@kbd uses ttsl only inside of @example and friends),
+ %   or `code' (@kbd uses normal tty font always).
+ \parseargdef\kbdinputstyle{%
+   \def\txiarg{#1}%
+   \ifx\txiarg\worddistinct
+     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
+   \else\ifx\txiarg\wordexample
+     \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
+   \else\ifx\txiarg\wordcode
+     \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @kbdinputstyle setting `\txiarg'}%
+   \fi\fi\fi
+ }
+ \def\worddistinct{distinct}
+ \def\wordexample{example}
+ \def\wordcode{code}
+ 
+ % Default is `distinct'.
+ \kbdinputstyle distinct
+ 
+ % @kbd is like @code, except that if the argument is just one @key command,
+ % then @kbd has no effect.
+ \def\kbd#1{{\def\look{#1}\expandafter\kbdsub\look??\par}}
+ 
+ \def\xkey{\key}
+ \def\kbdsub#1#2#3\par{%
+   \def\one{#1}\def\three{#3}\def\threex{??}%
+   \ifx\one\xkey\ifx\threex\three \key{#2}%
+   \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi
+   \else{\tclose{\kbdfont\setupmarkupstyle{kbd}\look}}\fi
+ }
+ 
+ % definition of @key that produces a lozenge.  Doesn't adjust to text size.
+ %\setfont\keyrm\rmshape{8}{1000}{OT1}
+ %\font\keysy=cmsy9
+ %\def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
+ %  \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
+ %    \vbox{\hrule\kern-0.4pt
+ %     \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
+ %    \kern-0.4pt\hrule}%
+ %  \kern-.06em\raise0.4pt\hbox{\angleright}}}}
+ 
+ % definition of @key with no lozenge.  If the current font is already
+ % monospace, don't change it; that way, we respect @kbdinputstyle.  But
+ % if it isn't monospace, then use \tt.
+ %
+ \def\key#1{{\setupmarkupstyle{key}%
+   \nohyphenation
+   \ifmonospace\else\tt\fi
+   #1}\null}
+ 
+ % @clicksequence{File @click{} Open ...}
+ \def\clicksequence#1{\begingroup #1\endgroup}
+ 
+ % @clickstyle @arrow   (by default)
+ \parseargdef\clickstyle{\def\click{#1}}
+ \def\click{\arrow}
+ 
+ % Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
+ % argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
+ %
+ \def\dmn#1{\thinspace #1}
+ 
+ % @l was never documented to mean ``switch to the Lisp font'',
+ % and it is not used as such in any manual I can find.  We need it for
+ % Polish suppressed-l.  --karl, 22sep96.
+ %\def\l#1{{\li #1}\null}
+ 
+ % @acronym for "FBI", "NATO", and the like.
+ % We print this one point size smaller, since it's intended for
+ % all-uppercase.
+ %
+ \def\acronym#1{\doacronym #1,,\finish}
+ \def\doacronym#1,#2,#3\finish{%
+   {\selectfonts\lsize #1}%
+   \def\temp{#2}%
+   \ifx\temp\empty \else
+     \space ({\unsepspaces \ignorespaces \temp \unskip})%
+   \fi
+   \null % reset \spacefactor=1000
+ }
+ 
+ % @abbr for "Comput. J." and the like.
+ % No font change, but don't do end-of-sentence spacing.
+ %
+ \def\abbr#1{\doabbr #1,,\finish}
+ \def\doabbr#1,#2,#3\finish{%
+   {\plainfrenchspacing #1}%
+   \def\temp{#2}%
+   \ifx\temp\empty \else
+     \space ({\unsepspaces \ignorespaces \temp \unskip})%
+   \fi
+   \null % reset \spacefactor=1000
+ }
+ 
+ % @asis just yields its argument.  Used with @table, for example.
+ %
+ \def\asis#1{#1}
+ 
+ % @math outputs its argument in math mode.
+ %
+ % One complication: _ usually means subscripts, but it could also mean
+ % an actual _ character, as in @math{@var{some_variable} + 1}.  So make
+ % _ active, and distinguish by seeing if the current family is \slfam,
+ % which is what @var uses.
+ {
+   \catcode`\_ = \active
+   \gdef\mathunderscore{%
+     \catcode`\_=\active
+     \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
+   }
+ }
+ % Another complication: we want \\ (and @\) to output a math (or tt) \.
+ % FYI, plain.tex uses \\ as a temporary control sequence (for no
+ % particular reason), but this is not advertised and we don't care.
+ %
+ % The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
+ \def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
+ %
+ \def\math{%
+   \tex
+   \mathunderscore
+   \let\\ = \mathbackslash
+   \mathactive
+   % make the texinfo accent commands work in math mode
+   \let\"=\ddot
+   \let\'=\acute
+   \let\==\bar
+   \let\^=\hat
+   \let\`=\grave
+   \let\u=\breve
+   \let\v=\check
+   \let\~=\tilde
+   \let\dotaccent=\dot
+   $\finishmath
+ }
+ \def\finishmath#1{#1$\endgroup}  % Close the group opened by \tex.
+ 
+ % Some active characters (such as <) are spaced differently in math.
+ % We have to reset their definitions in case the @math was an argument
+ % to a command which sets the catcodes (such as @item or @section).
+ %
+ {
+   \catcode`^ = \active
+   \catcode`< = \active
+   \catcode`> = \active
+   \catcode`+ = \active
+   \catcode`' = \active
+   \gdef\mathactive{%
+     \let^ = \ptexhat
+     \let< = \ptexless
+     \let> = \ptexgtr
+     \let+ = \ptexplus
+     \let' = \ptexquoteright
+   }
+ }
+ 
+ % ctrl is no longer a Texinfo command, but leave this definition for fun.
+ \def\ctrl #1{{\tt \rawbackslash \hat}#1}
+ 
+ % @inlinefmt{FMTNAME,PROCESSED-TEXT} and @inlineraw{FMTNAME,RAW-TEXT}.
+ % Ignore unless FMTNAME == tex; then it is like @iftex and @tex,
+ % except specified as a normal braced arg, so no newlines to worry about.
+ % 
+ \def\outfmtnametex{tex}
+ %
+ \long\def\inlinefmt#1{\doinlinefmt #1,\finish}
+ \long\def\doinlinefmt#1,#2,\finish{%
+   \def\inlinefmtname{#1}%
+   \ifx\inlinefmtname\outfmtnametex \ignorespaces #2\fi
+ }
+ % 
+ % @inlinefmtifelse{FMTNAME,THEN-TEXT,ELSE-TEXT} expands THEN-TEXT if
+ % FMTNAME is tex, else ELSE-TEXT.
+ \long\def\inlinefmtifelse#1{\doinlinefmtifelse #1,,,\finish}
+ \long\def\doinlinefmtifelse#1,#2,#3,#4,\finish{%
+   \def\inlinefmtname{#1}%
+   \ifx\inlinefmtname\outfmtnametex \ignorespaces #2\else \ignorespaces #3\fi
+ }
+ %
+ % For raw, must switch into @tex before parsing the argument, to avoid
+ % setting catcodes prematurely.  Doing it this way means that, for
+ % example, @inlineraw{html, foo{bar} gets a parse error instead of being
+ % ignored.  But this isn't important because if people want a literal
+ % *right* brace they would have to use a command anyway, so they may as
+ % well use a command to get a left brace too.  We could re-use the
+ % delimiter character idea from \verb, but it seems like overkill.
+ % 
+ \long\def\inlineraw{\tex \doinlineraw}
+ \long\def\doinlineraw#1{\doinlinerawtwo #1,\finish}
+ \def\doinlinerawtwo#1,#2,\finish{%
+   \def\inlinerawname{#1}%
+   \ifx\inlinerawname\outfmtnametex \ignorespaces #2\fi
+   \endgroup % close group opened by \tex.
+ }
+ 
+ % @inlineifset{VAR, TEXT} expands TEXT if VAR is @set.
+ %
+ \long\def\inlineifset#1{\doinlineifset #1,\finish}
+ \long\def\doinlineifset#1,#2,\finish{%
+   \def\inlinevarname{#1}%
+   \expandafter\ifx\csname SET\inlinevarname\endcsname\relax
+   \else\ignorespaces#2\fi
+ }
+ 
+ % @inlineifclear{VAR, TEXT} expands TEXT if VAR is not @set.
+ %
+ \long\def\inlineifclear#1{\doinlineifclear #1,\finish}
+ \long\def\doinlineifclear#1,#2,\finish{%
+   \def\inlinevarname{#1}%
+   \expandafter\ifx\csname SET\inlinevarname\endcsname\relax \ignorespaces#2\fi
+ }
+ 
+ 
+ \message{glyphs,}
+ % and logos.
+ 
+ % @@ prints an @, as does @atchar{}.
+ \def\@{\char64 }
+ \let\atchar=\@
+ 
+ % @{ @} @lbracechar{} @rbracechar{} all generate brace characters.
+ % Unless we're in typewriter, use \ecfont because the CM text fonts do
+ % not have braces, and we don't want to switch into math.
+ \def\mylbrace{{\ifmonospace\else\ecfont\fi \char123}}
+ \def\myrbrace{{\ifmonospace\else\ecfont\fi \char125}}
+ \let\{=\mylbrace \let\lbracechar=\{
+ \let\}=\myrbrace \let\rbracechar=\}
+ \begingroup
+   % Definitions to produce \{ and \} commands for indices,
+   % and @{ and @} for the aux/toc files.
+   \catcode`\{ = \other \catcode`\} = \other
+   \catcode`\[ = 1 \catcode`\] = 2
+   \catcode`\! = 0 \catcode`\\ = \other
+   !gdef!lbracecmd[\{]%
+   !gdef!rbracecmd[\}]%
+   !gdef!lbraceatcmd[@{]%
+   !gdef!rbraceatcmd[@}]%
+ !endgroup
+ 
+ % @comma{} to avoid , parsing problems.
+ \let\comma = ,
+ 
+ % Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
+ % Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
+ \let\, = \ptexc
+ \let\dotaccent = \ptexdot
+ \def\ringaccent#1{{\accent23 #1}}
+ \let\tieaccent = \ptext
+ \let\ubaraccent = \ptexb
+ \let\udotaccent = \d
+ 
+ % Other special characters: @questiondown @exclamdown @ordf @ordm
+ % Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
+ \def\questiondown{?`}
+ \def\exclamdown{!`}
+ \def\ordf{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{a}}}
+ \def\ordm{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{o}}}
+ 
+ % Dotless i and dotless j, used for accents.
+ \def\imacro{i}
+ \def\jmacro{j}
+ \def\dotless#1{%
+   \def\temp{#1}%
+   \ifx\temp\imacro \ifmmode\imath \else\ptexi \fi
+   \else\ifx\temp\jmacro \ifmmode\jmath \else\j \fi
+   \else \errmessage{@dotless can be used only with i or j}%
+   \fi\fi
+ }
+ 
+ % The \TeX{} logo, as in plain, but resetting the spacing so that a
+ % period following counts as ending a sentence.  (Idea found in latex.)
+ %
+ \edef\TeX{\TeX \spacefactor=1000 }
+ 
+ % @LaTeX{} logo.  Not quite the same results as the definition in
+ % latex.ltx, since we use a different font for the raised A; it's most
+ % convenient for us to use an explicitly smaller font, rather than using
+ % the \scriptstyle font (since we don't reset \scriptstyle and
+ % \scriptscriptstyle).
+ %
+ \def\LaTeX{%
+   L\kern-.36em
+   {\setbox0=\hbox{T}%
+    \vbox to \ht0{\hbox{%
+      \ifx\textnominalsize\xwordpt
+        % for 10pt running text, \lllsize (8pt) is too small for the A in LaTeX.
+        % Revert to plain's \scriptsize, which is 7pt.
+        \count255=\the\fam $\fam\count255 \scriptstyle A$%
+      \else
+        % For 11pt, we can use our lllsize.
+        \selectfonts\lllsize A%
+      \fi
+      }%
+      \vss
+   }}%
+   \kern-.15em
+   \TeX
+ }
+ 
+ % Some math mode symbols.
+ \def\bullet{$\ptexbullet$}
+ \def\geq{\ifmmode \ge\else $\ge$\fi}
+ \def\leq{\ifmmode \le\else $\le$\fi}
+ \def\minus{\ifmmode -\else $-$\fi}
+ 
+ % @dots{} outputs an ellipsis using the current font.
+ % We do .5em per period so that it has the same spacing in the cm
+ % typewriter fonts as three actual period characters; on the other hand,
+ % in other typewriter fonts three periods are wider than 1.5em.  So do
+ % whichever is larger.
+ %
+ \def\dots{%
+   \leavevmode
+   \setbox0=\hbox{...}% get width of three periods
+   \ifdim\wd0 > 1.5em
+     \dimen0 = \wd0
+   \else
+     \dimen0 = 1.5em
+   \fi
+   \hbox to \dimen0{%
+     \hskip 0pt plus.25fil
+     .\hskip 0pt plus1fil
+     .\hskip 0pt plus1fil
+     .\hskip 0pt plus.5fil
+   }%
+ }
+ 
+ % @enddots{} is an end-of-sentence ellipsis.
+ %
+ \def\enddots{%
+   \dots
+   \spacefactor=\endofsentencespacefactor
+ }
+ 
+ % @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
+ %
+ % Since these characters are used in examples, they should be an even number of
+ % \tt widths. Each \tt character is 1en, so two makes it 1em.
+ %
+ \def\point{$\star$}
+ \def\arrow{\leavevmode\raise.05ex\hbox to 1em{\hfil$\rightarrow$\hfil}}
+ \def\result{\leavevmode\raise.05ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
+ \def\expansion{\leavevmode\hbox to 1em{\hfil$\mapsto$\hfil}}
+ \def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
+ \def\equiv{\leavevmode\hbox to 1em{\hfil$\ptexequiv$\hfil}}
+ 
+ % The @error{} command.
+ % Adapted from the TeXbook's \boxit.
+ %
+ \newbox\errorbox
+ %
+ {\tentt \global\dimen0 = 3em}% Width of the box.
+ \dimen2 = .55pt % Thickness of rules
+ % The text. (`r' is open on the right, `e' somewhat less so on the left.)
+ \setbox0 = \hbox{\kern-.75pt \reducedsf \putworderror\kern-1.5pt}
+ %
+ \setbox\errorbox=\hbox to \dimen0{\hfil
+    \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
+    \advance\hsize by -2\dimen2 % Rules.
+    \vbox{%
+       \hrule height\dimen2
+       \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
+          \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
+          \kern3pt\vrule width\dimen2}% Space to right.
+       \hrule height\dimen2}
+     \hfil}
+ %
+ \def\error{\leavevmode\lower.7ex\copy\errorbox}
+ 
+ % @pounds{} is a sterling sign, which Knuth put in the CM italic font.
+ %
+ \def\pounds{{\it\$}}
+ 
+ % @euro{} comes from a separate font, depending on the current style.
+ % We use the free feym* fonts from the eurosym package by Henrik
+ % Theiling, which support regular, slanted, bold and bold slanted (and
+ % "outlined" (blackboard board, sort of) versions, which we don't need).
+ % It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
+ %
+ % Although only regular is the truly official Euro symbol, we ignore
+ % that.  The Euro is designed to be slightly taller than the regular
+ % font height.
+ %
+ % feymr - regular
+ % feymo - slanted
+ % feybr - bold
+ % feybo - bold slanted
+ %
+ % There is no good (free) typewriter version, to my knowledge.
+ % A feymr10 euro is ~7.3pt wide, while a normal cmtt10 char is ~5.25pt wide.
+ % Hmm.
+ %
+ % Also doesn't work in math.  Do we need to do math with euro symbols?
+ % Hope not.
+ %
+ %
+ \def\euro{{\eurofont e}}
+ \def\eurofont{%
+   % We set the font at each command, rather than predefining it in
+   % \textfonts and the other font-switching commands, so that
+   % installations which never need the symbol don't have to have the
+   % font installed.
+   %
+   % There is only one designed size (nominal 10pt), so we always scale
+   % that to the current nominal size.
+   %
+   % By the way, simply using "at 1em" works for cmr10 and the like, but
+   % does not work for cmbx10 and other extended/shrunken fonts.
+   %
+   \def\eurosize{\csname\curfontsize nominalsize\endcsname}%
+   %
+   \ifx\curfontstyle\bfstylename
+     % bold:
+     \font\thiseurofont = \ifusingit{feybo10}{feybr10} at \eurosize
+   \else
+     % regular:
+     \font\thiseurofont = \ifusingit{feymo10}{feymr10} at \eurosize
+   \fi
+   \thiseurofont
+ }
+ 
+ % Glyphs from the EC fonts.  We don't use \let for the aliases, because
+ % sometimes we redefine the original macro, and the alias should reflect
+ % the redefinition.
+ %
+ % Use LaTeX names for the Icelandic letters.
+ \def\DH{{\ecfont \char"D0}} % Eth
+ \def\dh{{\ecfont \char"F0}} % eth
+ \def\TH{{\ecfont \char"DE}} % Thorn
+ \def\th{{\ecfont \char"FE}} % thorn
+ %
+ \def\guillemetleft{{\ecfont \char"13}}
+ \def\guillemotleft{\guillemetleft}
+ \def\guillemetright{{\ecfont \char"14}}
+ \def\guillemotright{\guillemetright}
+ \def\guilsinglleft{{\ecfont \char"0E}}
+ \def\guilsinglright{{\ecfont \char"0F}}
+ \def\quotedblbase{{\ecfont \char"12}}
+ \def\quotesinglbase{{\ecfont \char"0D}}
+ %
+ % This positioning is not perfect (see the ogonek LaTeX package), but
+ % we have the precomposed glyphs for the most common cases.  We put the
+ % tests to use those glyphs in the single \ogonek macro so we have fewer
+ % dummy definitions to worry about for index entries, etc.
+ %
+ % ogonek is also used with other letters in Lithuanian (IOU), but using
+ % the precomposed glyphs for those is not so easy since they aren't in
+ % the same EC font.
+ \def\ogonek#1{{%
+   \def\temp{#1}%
+   \ifx\temp\macrocharA\Aogonek
+   \else\ifx\temp\macrochara\aogonek
+   \else\ifx\temp\macrocharE\Eogonek
+   \else\ifx\temp\macrochare\eogonek
+   \else
+     \ecfont \setbox0=\hbox{#1}%
+     \ifdim\ht0=1ex\accent"0C #1%
+     \else\ooalign{\unhbox0\crcr\hidewidth\char"0C \hidewidth}%
+     \fi
+   \fi\fi\fi\fi
+   }%
+ }
+ \def\Aogonek{{\ecfont \char"81}}\def\macrocharA{A}
+ \def\aogonek{{\ecfont \char"A1}}\def\macrochara{a}
+ \def\Eogonek{{\ecfont \char"86}}\def\macrocharE{E}
+ \def\eogonek{{\ecfont \char"A6}}\def\macrochare{e}
+ %
+ % Use the ec* fonts (cm-super in outline format) for non-CM glyphs.
+ \def\ecfont{%
+   % We can't distinguish serif/sans and italic/slanted, but this
+   % is used for crude hacks anyway (like adding French and German
+   % quotes to documents typeset with CM, where we lose kerning), so
+   % hopefully nobody will notice/care.
+   \edef\ecsize{\csname\curfontsize ecsize\endcsname}%
+   \edef\nominalsize{\csname\curfontsize nominalsize\endcsname}%
+   \ifmonospace
+     % typewriter:
+     \font\thisecfont = ectt\ecsize \space at \nominalsize
+   \else
+     \ifx\curfontstyle\bfstylename
+       % bold:
+       \font\thisecfont = ecb\ifusingit{i}{x}\ecsize \space at \nominalsize
+     \else
+       % regular:
+       \font\thisecfont = ec\ifusingit{ti}{rm}\ecsize \space at \nominalsize
+     \fi
+   \fi
+   \thisecfont
+ }
+ 
+ % @registeredsymbol - R in a circle.  The font for the R should really
+ % be smaller yet, but lllsize is the best we can do for now.
+ % Adapted from the plain.tex definition of \copyright.
+ %
+ \def\registeredsymbol{%
+   $^{{\ooalign{\hfil\raise.07ex\hbox{\selectfonts\lllsize R}%
+                \hfil\crcr\Orb}}%
+     }$%
+ }
+ 
+ % @textdegree - the normal degrees sign.
+ %
+ \def\textdegree{$^\circ$}
+ 
+ % Laurent Siebenmann reports \Orb undefined with:
+ %  Textures 1.7.7 (preloaded format=plain 93.10.14)  (68K)  16 APR 2004 02:38
+ % so we'll define it if necessary.
+ %
+ \ifx\Orb\thisisundefined
+ \def\Orb{\mathhexbox20D}
+ \fi
+ 
+ % Quotes.
+ \chardef\quotedblleft="5C
+ \chardef\quotedblright=`\"
+ \chardef\quoteleft=`\`
+ \chardef\quoteright=`\'
+ 
+ 
+ \message{page headings,}
+ 
+ \newskip\titlepagetopglue \titlepagetopglue = 1.5in
+ \newskip\titlepagebottomglue \titlepagebottomglue = 2pc
+ 
+ % First the title page.  Must do @settitle before @titlepage.
+ \newif\ifseenauthor
+ \newif\iffinishedtitlepage
+ 
+ % Do an implicit @contents or @shortcontents after @end titlepage if the
+ % user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
+ %
+ \newif\ifsetcontentsaftertitlepage
+  \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
+ \newif\ifsetshortcontentsaftertitlepage
+  \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
+ 
+ \parseargdef\shorttitlepage{%
+   \begingroup \hbox{}\vskip 1.5in \chaprm \centerline{#1}%
+   \endgroup\page\hbox{}\page}
+ 
+ \envdef\titlepage{%
+   % Open one extra group, as we want to close it in the middle of \Etitlepage.
+   \begingroup
+     \parindent=0pt \textfonts
+     % Leave some space at the very top of the page.
+     \vglue\titlepagetopglue
+     % No rule at page bottom unless we print one at the top with @title.
+     \finishedtitlepagetrue
+     %
+     % Most title ``pages'' are actually two pages long, with space
+     % at the top of the second.  We don't want the ragged left on the second.
+     \let\oldpage = \page
+     \def\page{%
+       \iffinishedtitlepage\else
+ 	 \finishtitlepage
+       \fi
+       \let\page = \oldpage
+       \page
+       \null
+     }%
+ }
+ 
+ \def\Etitlepage{%
+     \iffinishedtitlepage\else
+ 	\finishtitlepage
+     \fi
+     % It is important to do the page break before ending the group,
+     % because the headline and footline are only empty inside the group.
+     % If we use the new definition of \page, we always get a blank page
+     % after the title page, which we certainly don't want.
+     \oldpage
+   \endgroup
+   %
+   % Need this before the \...aftertitlepage checks so that if they are
+   % in effect the toc pages will come out with page numbers.
+   \HEADINGSon
+   %
+   % If they want short, they certainly want long too.
+   \ifsetshortcontentsaftertitlepage
+     \shortcontents
+     \contents
+     \global\let\shortcontents = \relax
+     \global\let\contents = \relax
+   \fi
+   %
+   \ifsetcontentsaftertitlepage
+     \contents
+     \global\let\contents = \relax
+     \global\let\shortcontents = \relax
+   \fi
+ }
+ 
+ \def\finishtitlepage{%
+   \vskip4pt \hrule height 2pt width \hsize
+   \vskip\titlepagebottomglue
+   \finishedtitlepagetrue
+ }
+ 
+ % Settings used for typesetting titles: no hyphenation, no indentation,
+ % don't worry much about spacing, ragged right.  This should be used
+ % inside a \vbox, and fonts need to be set appropriately first.  Because
+ % it is always used for titles, nothing else, we call \rmisbold.  \par
+ % should be specified before the end of the \vbox, since a vbox is a group.
+ % 
+ \def\raggedtitlesettings{%
+   \rmisbold
+   \hyphenpenalty=10000
+   \parindent=0pt
+   \tolerance=5000
+   \ptexraggedright
+ }
+ 
+ % Macros to be used within @titlepage:
+ 
+ \let\subtitlerm=\tenrm
+ \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
+ 
+ \parseargdef\title{%
+   \checkenv\titlepage
+   \vbox{\titlefonts \raggedtitlesettings #1\par}%
+   % print a rule at the page bottom also.
+   \finishedtitlepagefalse
+   \vskip4pt \hrule height 4pt width \hsize \vskip4pt
+ }
+ 
+ \parseargdef\subtitle{%
+   \checkenv\titlepage
+   {\subtitlefont \rightline{#1}}%
+ }
+ 
+ % @author should come last, but may come many times.
+ % It can also be used inside @quotation.
+ %
+ \parseargdef\author{%
+   \def\temp{\quotation}%
+   \ifx\thisenv\temp
+     \def\quotationauthor{#1}% printed in \Equotation.
+   \else
+     \checkenv\titlepage
+     \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
+     {\secfonts\rmisbold \leftline{#1}}%
+   \fi
+ }
+ 
+ 
+ % Set up page headings and footings.
+ 
+ \let\thispage=\folio
+ 
+ \newtoks\evenheadline    % headline on even pages
+ \newtoks\oddheadline     % headline on odd pages
+ \newtoks\evenfootline    % footline on even pages
+ \newtoks\oddfootline     % footline on odd pages
+ 
+ % Now make TeX use those variables
+ \headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
+                             \else \the\evenheadline \fi}}
+ \footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
+                             \else \the\evenfootline \fi}\HEADINGShook}
+ \let\HEADINGShook=\relax
+ 
+ % Commands to set those variables.
+ % For example, this is what  @headings on  does
+ % @evenheading @thistitle|@thispage|@thischapter
+ % @oddheading @thischapter|@thispage|@thistitle
+ % @evenfooting @thisfile||
+ % @oddfooting ||@thisfile
+ 
+ 
+ \def\evenheading{\parsearg\evenheadingxxx}
+ \def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
+ \def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
+ \global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+ 
+ \def\oddheading{\parsearg\oddheadingxxx}
+ \def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
+ \def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
+ \global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+ 
+ \parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
+ 
+ \def\evenfooting{\parsearg\evenfootingxxx}
+ \def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
+ \def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
+ \global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+ 
+ \def\oddfooting{\parsearg\oddfootingxxx}
+ \def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
+ \def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
+   \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
+   %
+   % Leave some space for the footline.  Hopefully ok to assume
+   % @evenfooting will not be used by itself.
+   \global\advance\pageheight by -12pt
+   \global\advance\vsize by -12pt
+ }
+ 
+ \parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
+ 
+ % @evenheadingmarks top     \thischapter <- chapter at the top of a page
+ % @evenheadingmarks bottom  \thischapter <- chapter at the bottom of a page
+ %
+ % The same set of arguments for:
+ %
+ % @oddheadingmarks
+ % @evenfootingmarks
+ % @oddfootingmarks
+ % @everyheadingmarks
+ % @everyfootingmarks
+ 
+ \def\evenheadingmarks{\headingmarks{even}{heading}}
+ \def\oddheadingmarks{\headingmarks{odd}{heading}}
+ \def\evenfootingmarks{\headingmarks{even}{footing}}
+ \def\oddfootingmarks{\headingmarks{odd}{footing}}
+ \def\everyheadingmarks#1 {\headingmarks{even}{heading}{#1}
+                           \headingmarks{odd}{heading}{#1} }
+ \def\everyfootingmarks#1 {\headingmarks{even}{footing}{#1}
+                           \headingmarks{odd}{footing}{#1} }
+ % #1 = even/odd, #2 = heading/footing, #3 = top/bottom.
+ \def\headingmarks#1#2#3 {%
+   \expandafter\let\expandafter\temp \csname get#3headingmarks\endcsname
+   \global\expandafter\let\csname get#1#2marks\endcsname \temp
+ }
+ 
+ \everyheadingmarks bottom
+ \everyfootingmarks bottom
+ 
+ % @headings double      turns headings on for double-sided printing.
+ % @headings single      turns headings on for single-sided printing.
+ % @headings off         turns them off.
+ % @headings on          same as @headings double, retained for compatibility.
+ % @headings after       turns on double-sided headings after this page.
+ % @headings doubleafter turns on double-sided headings after this page.
+ % @headings singleafter turns on single-sided headings after this page.
+ % By default, they are off at the start of a document,
+ % and turned `on' after @end titlepage.
+ 
+ \def\headings #1 {\csname HEADINGS#1\endcsname}
+ 
+ \def\headingsoff{% non-global headings elimination
+   \evenheadline={\hfil}\evenfootline={\hfil}%
+    \oddheadline={\hfil}\oddfootline={\hfil}%
+ }
+ 
+ \def\HEADINGSoff{{\globaldefs=1 \headingsoff}} % global setting
+ \HEADINGSoff  % it's the default
+ 
+ % When we turn headings on, set the page number to 1.
+ % For double-sided printing, put current file name in lower left corner,
+ % chapter name on inside top of right hand pages, document
+ % title on inside top of left hand pages, and page numbers on outside top
+ % edge of all pages.
+ \def\HEADINGSdouble{%
+ \global\pageno=1
+ \global\evenfootline={\hfil}
+ \global\oddfootline={\hfil}
+ \global\evenheadline={\line{\folio\hfil\thistitle}}
+ \global\oddheadline={\line{\thischapter\hfil\folio}}
+ \global\let\contentsalignmacro = \chapoddpage
+ }
+ \let\contentsalignmacro = \chappager
+ 
+ % For single-sided printing, chapter title goes across top left of page,
+ % page number on top right.
+ \def\HEADINGSsingle{%
+ \global\pageno=1
+ \global\evenfootline={\hfil}
+ \global\oddfootline={\hfil}
+ \global\evenheadline={\line{\thischapter\hfil\folio}}
+ \global\oddheadline={\line{\thischapter\hfil\folio}}
+ \global\let\contentsalignmacro = \chappager
+ }
+ \def\HEADINGSon{\HEADINGSdouble}
+ 
+ \def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
+ \let\HEADINGSdoubleafter=\HEADINGSafter
+ \def\HEADINGSdoublex{%
+ \global\evenfootline={\hfil}
+ \global\oddfootline={\hfil}
+ \global\evenheadline={\line{\folio\hfil\thistitle}}
+ \global\oddheadline={\line{\thischapter\hfil\folio}}
+ \global\let\contentsalignmacro = \chapoddpage
+ }
+ 
+ \def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
+ \def\HEADINGSsinglex{%
+ \global\evenfootline={\hfil}
+ \global\oddfootline={\hfil}
+ \global\evenheadline={\line{\thischapter\hfil\folio}}
+ \global\oddheadline={\line{\thischapter\hfil\folio}}
+ \global\let\contentsalignmacro = \chappager
+ }
+ 
+ % Subroutines used in generating headings
+ % This produces Day Month Year style of output.
+ % Only define if not already defined, in case a txi-??.tex file has set
+ % up a different format (e.g., txi-cs.tex does this).
+ \ifx\today\thisisundefined
+ \def\today{%
+   \number\day\space
+   \ifcase\month
+   \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
+   \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
+   \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
+   \fi
+   \space\number\year}
+ \fi
+ 
+ % @settitle line...  specifies the title of the document, for headings.
+ % It generates no output of its own.
+ \def\thistitle{\putwordNoTitle}
+ \def\settitle{\parsearg{\gdef\thistitle}}
+ 
+ 
+ \message{tables,}
+ % Tables -- @table, @ftable, @vtable, @item(x).
+ 
+ % default indentation of table text
+ \newdimen\tableindent \tableindent=.8in
+ % default indentation of @itemize and @enumerate text
+ \newdimen\itemindent  \itemindent=.3in
+ % margin between end of table item and start of table text.
+ \newdimen\itemmargin  \itemmargin=.1in
+ 
+ % used internally for \itemindent minus \itemmargin
+ \newdimen\itemmax
+ 
+ % Note @table, @ftable, and @vtable define @item, @itemx, etc., with
+ % these defs.
+ % They also define \itemindex
+ % to index the item name in whatever manner is desired (perhaps none).
+ 
+ \newif\ifitemxneedsnegativevskip
+ 
+ \def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
+ 
+ \def\internalBitem{\smallbreak \parsearg\itemzzz}
+ \def\internalBitemx{\itemxpar \parsearg\itemzzz}
+ 
+ \def\itemzzz #1{\begingroup %
+   \advance\hsize by -\rightskip
+   \advance\hsize by -\tableindent
+   \setbox0=\hbox{\itemindicate{#1}}%
+   \itemindex{#1}%
+   \nobreak % This prevents a break before @itemx.
+   %
+   % If the item text does not fit in the space we have, put it on a line
+   % by itself, and do not allow a page break either before or after that
+   % line.  We do not start a paragraph here because then if the next
+   % command is, e.g., @kindex, the whatsit would get put into the
+   % horizontal list on a line by itself, resulting in extra blank space.
+   \ifdim \wd0>\itemmax
+     %
+     % Make this a paragraph so we get the \parskip glue and wrapping,
+     % but leave it ragged-right.
+     \begingroup
+       \advance\leftskip by-\tableindent
+       \advance\hsize by\tableindent
+       \advance\rightskip by0pt plus1fil\relax
+       \leavevmode\unhbox0\par
+     \endgroup
+     %
+     % We're going to be starting a paragraph, but we don't want the
+     % \parskip glue -- logically it's part of the @item we just started.
+     \nobreak \vskip-\parskip
+     %
+     % Stop a page break at the \parskip glue coming up.  However, if
+     % what follows is an environment such as @example, there will be no
+     % \parskip glue; then the negative vskip we just inserted would
+     % cause the example and the item to crash together.  So we use this
+     % bizarre value of 10001 as a signal to \aboveenvbreak to insert
+     % \parskip glue after all.  Section titles are handled this way also.
+     %
+     \penalty 10001
+     \endgroup
+     \itemxneedsnegativevskipfalse
+   \else
+     % The item text fits into the space.  Start a paragraph, so that the
+     % following text (if any) will end up on the same line.
+     \noindent
+     % Do this with kerns and \unhbox so that if there is a footnote in
+     % the item text, it can migrate to the main vertical list and
+     % eventually be printed.
+     \nobreak\kern-\tableindent
+     \dimen0 = \itemmax  \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
+     \unhbox0
+     \nobreak\kern\dimen0
+     \endgroup
+     \itemxneedsnegativevskiptrue
+   \fi
+ }
+ 
+ \def\item{\errmessage{@item while not in a list environment}}
+ \def\itemx{\errmessage{@itemx while not in a list environment}}
+ 
+ % @table, @ftable, @vtable.
+ \envdef\table{%
+   \let\itemindex\gobble
+   \tablecheck{table}%
+ }
+ \envdef\ftable{%
+   \def\itemindex ##1{\doind {fn}{\code{##1}}}%
+   \tablecheck{ftable}%
+ }
+ \envdef\vtable{%
+   \def\itemindex ##1{\doind {vr}{\code{##1}}}%
+   \tablecheck{vtable}%
+ }
+ \def\tablecheck#1{%
+   \ifnum \the\catcode`\^^M=\active
+     \endgroup
+     \errmessage{This command won't work in this context; perhaps the problem is
+       that we are \inenvironment\thisenv}%
+     \def\next{\doignore{#1}}%
+   \else
+     \let\next\tablex
+   \fi
+   \next
+ }
+ \def\tablex#1{%
+   \def\itemindicate{#1}%
+   \parsearg\tabley
+ }
+ \def\tabley#1{%
+   {%
+     \makevalueexpandable
+     \edef\temp{\noexpand\tablez #1\space\space\space}%
+     \expandafter
+   }\temp \endtablez
+ }
+ \def\tablez #1 #2 #3 #4\endtablez{%
+   \aboveenvbreak
+   \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
+   \ifnum 0#2>0 \tableindent=#2\mil \fi
+   \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
+   \itemmax=\tableindent
+   \advance \itemmax by -\itemmargin
+   \advance \leftskip by \tableindent
+   \exdentamount=\tableindent
+   \parindent = 0pt
+   \parskip = \smallskipamount
+   \ifdim \parskip=0pt \parskip=2pt \fi
+   \let\item = \internalBitem
+   \let\itemx = \internalBitemx
+ }
+ \def\Etable{\endgraf\afterenvbreak}
+ \let\Eftable\Etable
+ \let\Evtable\Etable
+ \let\Eitemize\Etable
+ \let\Eenumerate\Etable
+ 
+ % This is the counter used by @enumerate, which is really @itemize
+ 
+ \newcount \itemno
+ 
+ \envdef\itemize{\parsearg\doitemize}
+ 
+ \def\doitemize#1{%
+   \aboveenvbreak
+   \itemmax=\itemindent
+   \advance\itemmax by -\itemmargin
+   \advance\leftskip by \itemindent
+   \exdentamount=\itemindent
+   \parindent=0pt
+   \parskip=\smallskipamount
+   \ifdim\parskip=0pt \parskip=2pt \fi
+   %
+   % Try typesetting the item mark that if the document erroneously says
+   % something like @itemize @samp (intending @table), there's an error
+   % right away at the @itemize.  It's not the best error message in the
+   % world, but it's better than leaving it to the @item.  This means if
+   % the user wants an empty mark, they have to say @w{} not just @w.
+   \def\itemcontents{#1}%
+   \setbox0 = \hbox{\itemcontents}%
+   %
+   % @itemize with no arg is equivalent to @itemize @bullet.
+   \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
+   %
+   \let\item=\itemizeitem
+ }
+ 
+ % Definition of @item while inside @itemize and @enumerate.
+ %
+ \def\itemizeitem{%
+   \advance\itemno by 1  % for enumerations
+   {\let\par=\endgraf \smallbreak}% reasonable place to break
+   {%
+    % If the document has an @itemize directly after a section title, a
+    % \nobreak will be last on the list, and \sectionheading will have
+    % done a \vskip-\parskip.  In that case, we don't want to zero
+    % parskip, or the item text will crash with the heading.  On the
+    % other hand, when there is normal text preceding the item (as there
+    % usually is), we do want to zero parskip, or there would be too much
+    % space.  In that case, we won't have a \nobreak before.  At least
+    % that's the theory.
+    \ifnum\lastpenalty<10000 \parskip=0in \fi
+    \noindent
+    \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
+    %
+    \vadjust{\penalty 1200}}% not good to break after first line of item.
+   \flushcr
+ }
+ 
+ % \splitoff TOKENS\endmark defines \first to be the first token in
+ % TOKENS, and \rest to be the remainder.
+ %
+ \def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
+ 
+ % Allow an optional argument of an uppercase letter, lowercase letter,
+ % or number, to specify the first label in the enumerated list.  No
+ % argument is the same as `1'.
+ %
+ \envparseargdef\enumerate{\enumeratey #1  \endenumeratey}
+ \def\enumeratey #1 #2\endenumeratey{%
+   % If we were given no argument, pretend we were given `1'.
+   \def\thearg{#1}%
+   \ifx\thearg\empty \def\thearg{1}\fi
+   %
+   % Detect if the argument is a single token.  If so, it might be a
+   % letter.  Otherwise, the only valid thing it can be is a number.
+   % (We will always have one token, because of the test we just made.
+   % This is a good thing, since \splitoff doesn't work given nothing at
+   % all -- the first parameter is undelimited.)
+   \expandafter\splitoff\thearg\endmark
+   \ifx\rest\empty
+     % Only one token in the argument.  It could still be anything.
+     % A ``lowercase letter'' is one whose \lccode is nonzero.
+     % An ``uppercase letter'' is one whose \lccode is both nonzero, and
+     %   not equal to itself.
+     % Otherwise, we assume it's a number.
+     %
+     % We need the \relax at the end of the \ifnum lines to stop TeX from
+     % continuing to look for a <number>.
+     %
+     \ifnum\lccode\expandafter`\thearg=0\relax
+       \numericenumerate % a number (we hope)
+     \else
+       % It's a letter.
+       \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
+         \lowercaseenumerate % lowercase letter
+       \else
+         \uppercaseenumerate % uppercase letter
+       \fi
+     \fi
+   \else
+     % Multiple tokens in the argument.  We hope it's a number.
+     \numericenumerate
+   \fi
+ }
+ 
+ % An @enumerate whose labels are integers.  The starting integer is
+ % given in \thearg.
+ %
+ \def\numericenumerate{%
+   \itemno = \thearg
+   \startenumeration{\the\itemno}%
+ }
+ 
+ % The starting (lowercase) letter is in \thearg.
+ \def\lowercaseenumerate{%
+   \itemno = \expandafter`\thearg
+   \startenumeration{%
+     % Be sure we're not beyond the end of the alphabet.
+     \ifnum\itemno=0
+       \errmessage{No more lowercase letters in @enumerate; get a bigger
+                   alphabet}%
+     \fi
+     \char\lccode\itemno
+   }%
+ }
+ 
+ % The starting (uppercase) letter is in \thearg.
+ \def\uppercaseenumerate{%
+   \itemno = \expandafter`\thearg
+   \startenumeration{%
+     % Be sure we're not beyond the end of the alphabet.
+     \ifnum\itemno=0
+       \errmessage{No more uppercase letters in @enumerate; get a bigger
+                   alphabet}
+     \fi
+     \char\uccode\itemno
+   }%
+ }
+ 
+ % Call \doitemize, adding a period to the first argument and supplying the
+ % common last two arguments.  Also subtract one from the initial value in
+ % \itemno, since @item increments \itemno.
+ %
+ \def\startenumeration#1{%
+   \advance\itemno by -1
+   \doitemize{#1.}\flushcr
+ }
+ 
+ % @alphaenumerate and @capsenumerate are abbreviations for giving an arg
+ % to @enumerate.
+ %
+ \def\alphaenumerate{\enumerate{a}}
+ \def\capsenumerate{\enumerate{A}}
+ \def\Ealphaenumerate{\Eenumerate}
+ \def\Ecapsenumerate{\Eenumerate}
+ 
+ 
+ % @multitable macros
+ % Amy Hendrickson, 8/18/94, 3/6/96
+ %
+ % @multitable ... @end multitable will make as many columns as desired.
+ % Contents of each column will wrap at width given in preamble.  Width
+ % can be specified either with sample text given in a template line,
+ % or in percent of \hsize, the current width of text on page.
+ 
+ % Table can continue over pages but will only break between lines.
+ 
+ % To make preamble:
+ %
+ % Either define widths of columns in terms of percent of \hsize:
+ %   @multitable @columnfractions .25 .3 .45
+ %   @item ...
+ %
+ %   Numbers following @columnfractions are the percent of the total
+ %   current hsize to be used for each column. You may use as many
+ %   columns as desired.
+ 
+ 
+ % Or use a template:
+ %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
+ %   @item ...
+ %   using the widest term desired in each column.
+ 
+ % Each new table line starts with @item, each subsequent new column
+ % starts with @tab. Empty columns may be produced by supplying @tab's
+ % with nothing between them for as many times as empty columns are needed,
+ % ie, @tab@tab@tab will produce two empty columns.
+ 
+ % @item, @tab do not need to be on their own lines, but it will not hurt
+ % if they are.
+ 
+ % Sample multitable:
+ 
+ %   @multitable {Column 1 template} {Column 2 template} {Column 3 template}
+ %   @item first col stuff @tab second col stuff @tab third col
+ %   @item
+ %   first col stuff
+ %   @tab
+ %   second col stuff
+ %   @tab
+ %   third col
+ %   @item first col stuff @tab second col stuff
+ %   @tab Many paragraphs of text may be used in any column.
+ %
+ %         They will wrap at the width determined by the template.
+ %   @item@tab@tab This will be in third column.
+ %   @end multitable
+ 
+ % Default dimensions may be reset by user.
+ % @multitableparskip is vertical space between paragraphs in table.
+ % @multitableparindent is paragraph indent in table.
+ % @multitablecolmargin is horizontal space to be left between columns.
+ % @multitablelinespace is space to leave between table items, baseline
+ %                                                            to baseline.
+ %   0pt means it depends on current normal line spacing.
+ %
+ \newskip\multitableparskip
+ \newskip\multitableparindent
+ \newdimen\multitablecolspace
+ \newskip\multitablelinespace
+ \multitableparskip=0pt
+ \multitableparindent=6pt
+ \multitablecolspace=12pt
+ \multitablelinespace=0pt
+ 
+ % Macros used to set up halign preamble:
+ %
+ \let\endsetuptable\relax
+ \def\xendsetuptable{\endsetuptable}
+ \let\columnfractions\relax
+ \def\xcolumnfractions{\columnfractions}
+ \newif\ifsetpercent
+ 
+ % #1 is the @columnfraction, usually a decimal number like .5, but might
+ % be just 1.  We just use it, whatever it is.
+ %
+ \def\pickupwholefraction#1 {%
+   \global\advance\colcount by 1
+   \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
+   \setuptable
+ }
+ 
+ \newcount\colcount
+ \def\setuptable#1{%
+   \def\firstarg{#1}%
+   \ifx\firstarg\xendsetuptable
+     \let\go = \relax
+   \else
+     \ifx\firstarg\xcolumnfractions
+       \global\setpercenttrue
+     \else
+       \ifsetpercent
+          \let\go\pickupwholefraction
+       \else
+          \global\advance\colcount by 1
+          \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
+                    % separator; typically that is always in the input, anyway.
+          \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
+       \fi
+     \fi
+     \ifx\go\pickupwholefraction
+       % Put the argument back for the \pickupwholefraction call, so
+       % we'll always have a period there to be parsed.
+       \def\go{\pickupwholefraction#1}%
+     \else
+       \let\go = \setuptable
+     \fi%
+   \fi
+   \go
+ }
+ 
+ % multitable-only commands.
+ %
+ % @headitem starts a heading row, which we typeset in bold.
+ % Assignments have to be global since we are inside the implicit group
+ % of an alignment entry.  \everycr resets \everytab so we don't have to
+ % undo it ourselves.
+ \def\headitemfont{\b}% for people to use in the template row; not changeable
+ \def\headitem{%
+   \checkenv\multitable
+   \crcr
+   \global\everytab={\bf}% can't use \headitemfont since the parsing differs
+   \the\everytab % for the first item
+ }%
+ %
+ % A \tab used to include \hskip1sp.  But then the space in a template
+ % line is not enough.  That is bad.  So let's go back to just `&' until
+ % we again encounter the problem the 1sp was intended to solve.
+ %					--karl, nathan@acm.org, 20apr99.
+ \def\tab{\checkenv\multitable &\the\everytab}%
+ 
+ % @multitable ... @end multitable definitions:
+ %
+ \newtoks\everytab  % insert after every tab.
+ %
+ \envdef\multitable{%
+   \vskip\parskip
+   \startsavinginserts
+   %
+   % @item within a multitable starts a normal row.
+   % We use \def instead of \let so that if one of the multitable entries
+   % contains an @itemize, we don't choke on the \item (seen as \crcr aka
+   % \endtemplate) expanding \doitemize.
+   \def\item{\crcr}%
+   %
+   \tolerance=9500
+   \hbadness=9500
+   \setmultitablespacing
+   \parskip=\multitableparskip
+   \parindent=\multitableparindent
+   \overfullrule=0pt
+   \global\colcount=0
+   %
+   \everycr = {%
+     \noalign{%
+       \global\everytab={}%
+       \global\colcount=0 % Reset the column counter.
+       % Check for saved footnotes, etc.
+       \checkinserts
+       % Keeps underfull box messages off when table breaks over pages.
+       %\filbreak
+ 	% Maybe so, but it also creates really weird page breaks when the
+ 	% table breaks over pages. Wouldn't \vfil be better?  Wait until the
+ 	% problem manifests itself, so it can be fixed for real --karl.
+     }%
+   }%
+   %
+   \parsearg\domultitable
+ }
+ \def\domultitable#1{%
+   % To parse everything between @multitable and @item:
+   \setuptable#1 \endsetuptable
+   %
+   % This preamble sets up a generic column definition, which will
+   % be used as many times as user calls for columns.
+   % \vtop will set a single line and will also let text wrap and
+   % continue for many paragraphs if desired.
+   \halign\bgroup &%
+     \global\advance\colcount by 1
+     \multistrut
+     \vtop{%
+       % Use the current \colcount to find the correct column width:
+       \hsize=\expandafter\csname col\the\colcount\endcsname
+       %
+       % In order to keep entries from bumping into each other
+       % we will add a \leftskip of \multitablecolspace to all columns after
+       % the first one.
+       %
+       % If a template has been used, we will add \multitablecolspace
+       % to the width of each template entry.
+       %
+       % If the user has set preamble in terms of percent of \hsize we will
+       % use that dimension as the width of the column, and the \leftskip
+       % will keep entries from bumping into each other.  Table will start at
+       % left margin and final column will justify at right margin.
+       %
+       % Make sure we don't inherit \rightskip from the outer environment.
+       \rightskip=0pt
+       \ifnum\colcount=1
+ 	% The first column will be indented with the surrounding text.
+ 	\advance\hsize by\leftskip
+       \else
+ 	\ifsetpercent \else
+ 	  % If user has not set preamble in terms of percent of \hsize
+ 	  % we will advance \hsize by \multitablecolspace.
+ 	  \advance\hsize by \multitablecolspace
+ 	\fi
+        % In either case we will make \leftskip=\multitablecolspace:
+       \leftskip=\multitablecolspace
+       \fi
+       % Ignoring space at the beginning and end avoids an occasional spurious
+       % blank line, when TeX decides to break the line at the space before the
+       % box from the multistrut, so the strut ends up on a line by itself.
+       % For example:
+       % @multitable @columnfractions .11 .89
+       % @item @code{#}
+       % @tab Legal holiday which is valid in major parts of the whole country.
+       % Is automatically provided with highlighting sequences respectively
+       % marking characters.
+       \noindent\ignorespaces##\unskip\multistrut
+     }\cr
+ }
+ \def\Emultitable{%
+   \crcr
+   \egroup % end the \halign
+   \global\setpercentfalse
+ }
+ 
+ \def\setmultitablespacing{%
+   \def\multistrut{\strut}% just use the standard line spacing
+   %
+   % Compute \multitablelinespace (if not defined by user) for use in
+   % \multitableparskip calculation.  We used define \multistrut based on
+   % this, but (ironically) that caused the spacing to be off.
+   % See bug-texinfo report from Werner Lemberg, 31 Oct 2004 12:52:20 +0100.
+ \ifdim\multitablelinespace=0pt
+ \setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
+ \global\advance\multitablelinespace by-\ht0
+ \fi
+ % Test to see if parskip is larger than space between lines of
+ % table. If not, do nothing.
+ %        If so, set to same dimension as multitablelinespace.
+ \ifdim\multitableparskip>\multitablelinespace
+ \global\multitableparskip=\multitablelinespace
+ \global\advance\multitableparskip-7pt % to keep parskip somewhat smaller
+                                       % than skip between lines in the table.
+ \fi%
+ \ifdim\multitableparskip=0pt
+ \global\multitableparskip=\multitablelinespace
+ \global\advance\multitableparskip-7pt % to keep parskip somewhat smaller
+                                       % than skip between lines in the table.
+ \fi}
+ 
+ 
+ \message{conditionals,}
+ 
+ % @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
+ % @ifnotxml always succeed.  They currently do nothing; we don't
+ % attempt to check whether the conditionals are properly nested.  But we
+ % have to remember that they are conditionals, so that @end doesn't
+ % attempt to close an environment group.
+ %
+ \def\makecond#1{%
+   \expandafter\let\csname #1\endcsname = \relax
+   \expandafter\let\csname iscond.#1\endcsname = 1
+ }
+ \makecond{iftex}
+ \makecond{ifnotdocbook}
+ \makecond{ifnothtml}
+ \makecond{ifnotinfo}
+ \makecond{ifnotplaintext}
+ \makecond{ifnotxml}
+ 
+ % Ignore @ignore, @ifhtml, @ifinfo, and the like.
+ %
+ \def\direntry{\doignore{direntry}}
+ \def\documentdescription{\doignore{documentdescription}}
+ \def\docbook{\doignore{docbook}}
+ \def\html{\doignore{html}}
+ \def\ifdocbook{\doignore{ifdocbook}}
+ \def\ifhtml{\doignore{ifhtml}}
+ \def\ifinfo{\doignore{ifinfo}}
+ \def\ifnottex{\doignore{ifnottex}}
+ \def\ifplaintext{\doignore{ifplaintext}}
+ \def\ifxml{\doignore{ifxml}}
+ \def\ignore{\doignore{ignore}}
+ \def\menu{\doignore{menu}}
+ \def\xml{\doignore{xml}}
+ 
+ % Ignore text until a line `@end #1', keeping track of nested conditionals.
+ %
+ % A count to remember the depth of nesting.
+ \newcount\doignorecount
+ 
+ \def\doignore#1{\begingroup
+   % Scan in ``verbatim'' mode:
+   \obeylines
+   \catcode`\@ = \other
+   \catcode`\{ = \other
+   \catcode`\} = \other
+   %
+   % Make sure that spaces turn into tokens that match what \doignoretext wants.
+   \spaceisspace
+   %
+   % Count number of #1's that we've seen.
+   \doignorecount = 0
+   %
+   % Swallow text until we reach the matching `@end #1'.
+   \dodoignore{#1}%
+ }
+ 
+ { \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
+   \obeylines %
+   %
+   \gdef\dodoignore#1{%
+     % #1 contains the command name as a string, e.g., `ifinfo'.
+     %
+     % Define a command to find the next `@end #1'.
+     \long\def\doignoretext##1^^M@end #1{%
+       \doignoretextyyy##1^^M@#1\_STOP_}%
+     %
+     % And this command to find another #1 command, at the beginning of a
+     % line.  (Otherwise, we would consider a line `@c @ifset', for
+     % example, to count as an @ifset for nesting.)
+     \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
+     %
+     % And now expand that command.
+     \doignoretext ^^M%
+   }%
+ }
+ 
+ \def\doignoreyyy#1{%
+   \def\temp{#1}%
+   \ifx\temp\empty			% Nothing found.
+     \let\next\doignoretextzzz
+   \else					% Found a nested condition, ...
+     \advance\doignorecount by 1
+     \let\next\doignoretextyyy		% ..., look for another.
+     % If we're here, #1 ends with ^^M\ifinfo (for example).
+   \fi
+   \next #1% the token \_STOP_ is present just after this macro.
+ }
+ 
+ % We have to swallow the remaining "\_STOP_".
+ %
+ \def\doignoretextzzz#1{%
+   \ifnum\doignorecount = 0	% We have just found the outermost @end.
+     \let\next\enddoignore
+   \else				% Still inside a nested condition.
+     \advance\doignorecount by -1
+     \let\next\doignoretext      % Look for the next @end.
+   \fi
+   \next
+ }
+ 
+ % Finish off ignored text.
+ { \obeylines%
+   % Ignore anything after the last `@end #1'; this matters in verbatim
+   % environments, where otherwise the newline after an ignored conditional
+   % would result in a blank line in the output.
+   \gdef\enddoignore#1^^M{\endgroup\ignorespaces}%
+ }
+ 
+ 
+ % @set VAR sets the variable VAR to an empty value.
+ % @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
+ %
+ % Since we want to separate VAR from REST-OF-LINE (which might be
+ % empty), we can't just use \parsearg; we have to insert a space of our
+ % own to delimit the rest of the line, and then take it out again if we
+ % didn't need it.
+ % We rely on the fact that \parsearg sets \catcode`\ =10.
+ %
+ \parseargdef\set{\setyyy#1 \endsetyyy}
+ \def\setyyy#1 #2\endsetyyy{%
+   {%
+     \makevalueexpandable
+     \def\temp{#2}%
+     \edef\next{\gdef\makecsname{SET#1}}%
+     \ifx\temp\empty
+       \next{}%
+     \else
+       \setzzz#2\endsetzzz
+     \fi
+   }%
+ }
+ % Remove the trailing space \setxxx inserted.
+ \def\setzzz#1 \endsetzzz{\next{#1}}
+ 
+ % @clear VAR clears (i.e., unsets) the variable VAR.
+ %
+ \parseargdef\clear{%
+   {%
+     \makevalueexpandable
+     \global\expandafter\let\csname SET#1\endcsname=\relax
+   }%
+ }
+ 
+ % @value{foo} gets the text saved in variable foo.
+ \def\value{\begingroup\makevalueexpandable\valuexxx}
+ \def\valuexxx#1{\expandablevalue{#1}\endgroup}
+ {
+   \catcode`\-=\active \catcode`\_=\active
+   %
+   \gdef\makevalueexpandable{%
+     \let\value = \expandablevalue
+     % We don't want these characters active, ...
+     \catcode`\-=\other \catcode`\_=\other
+     % ..., but we might end up with active ones in the argument if
+     % we're called from @code, as @code{@value{foo-bar_}}, though.
+     % So \let them to their normal equivalents.
+     \let-\normaldash \let_\normalunderscore
+   }
+ }
+ 
+ % We have this subroutine so that we can handle at least some @value's
+ % properly in indexes (we call \makevalueexpandable in \indexdummies).
+ % The command has to be fully expandable (if the variable is set), since
+ % the result winds up in the index file.  This means that if the
+ % variable's value contains other Texinfo commands, it's almost certain
+ % it will fail (although perhaps we could fix that with sufficient work
+ % to do a one-level expansion on the result, instead of complete).
+ % 
+ % Unfortunately, this has the consequence that when _ is in the *value*
+ % of an @set, it does not print properly in the roman fonts (get the cmr
+ % dot accent at position 126 instead).  No fix comes to mind, and it's
+ % been this way since 2003 or earlier, so just ignore it.
+ % 
+ \def\expandablevalue#1{%
+   \expandafter\ifx\csname SET#1\endcsname\relax
+     {[No value for ``#1'']}%
+     \message{Variable `#1', used in @value, is not set.}%
+   \else
+     \csname SET#1\endcsname
+   \fi
+ }
+ 
+ % @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
+ % with @set.
+ % 
+ % To get the special treatment we need for `@end ifset,' we call
+ % \makecond and then redefine.
+ %
+ \makecond{ifset}
+ \def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
+ \def\doifset#1#2{%
+   {%
+     \makevalueexpandable
+     \let\next=\empty
+     \expandafter\ifx\csname SET#2\endcsname\relax
+       #1% If not set, redefine \next.
+     \fi
+     \expandafter
+   }\next
+ }
+ \def\ifsetfail{\doignore{ifset}}
+ 
+ % @ifclear VAR ... @end executes the `...' iff VAR has never been
+ % defined with @set, or has been undefined with @clear.
+ %
+ % The `\else' inside the `\doifset' parameter is a trick to reuse the
+ % above code: if the variable is not set, do nothing, if it is set,
+ % then redefine \next to \ifclearfail.
+ %
+ \makecond{ifclear}
+ \def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
+ \def\ifclearfail{\doignore{ifclear}}
+ 
+ % @ifcommandisdefined CMD ... @end executes the `...' if CMD (written
+ % without the @) is in fact defined.  We can only feasibly check at the
+ % TeX level, so something like `mathcode' is going to considered
+ % defined even though it is not a Texinfo command.
+ % 
+ \makecond{ifcommanddefined}
+ \def\ifcommanddefined{\parsearg{\doifcmddefined{\let\next=\ifcmddefinedfail}}}
+ %
+ \def\doifcmddefined#1#2{{%
+     \makevalueexpandable
+     \let\next=\empty
+     \expandafter\ifx\csname #2\endcsname\relax
+       #1% If not defined, \let\next as above.
+     \fi
+     \expandafter
+   }\next
+ }
+ \def\ifcmddefinedfail{\doignore{ifcommanddefined}}
+ 
+ % @ifcommandnotdefined CMD ... handled similar to @ifclear above.
+ \makecond{ifcommandnotdefined}
+ \def\ifcommandnotdefined{%
+   \parsearg{\doifcmddefined{\else \let\next=\ifcmdnotdefinedfail}}}
+ \def\ifcmdnotdefinedfail{\doignore{ifcommandnotdefined}}
+ 
+ % Set the `txicommandconditionals' variable, so documents have a way to
+ % test if the @ifcommand...defined conditionals are available.
+ \set txicommandconditionals
+ 
+ % @dircategory CATEGORY  -- specify a category of the dir file
+ % which this file should belong to.  Ignore this in TeX.
+ \let\dircategory=\comment
+ 
+ % @defininfoenclose.
+ \let\definfoenclose=\comment
+ 
+ 
+ \message{indexing,}
+ % Index generation facilities
+ 
+ % Define \newwrite to be identical to plain tex's \newwrite
+ % except not \outer, so it can be used within macros and \if's.
+ \edef\newwrite{\makecsname{ptexnewwrite}}
+ 
+ % \newindex {foo} defines an index named foo.
+ % It automatically defines \fooindex such that
+ % \fooindex ...rest of line... puts an entry in the index foo.
+ % It also defines \fooindfile to be the number of the output channel for
+ % the file that accumulates this index.  The file's extension is foo.
+ % The name of an index should be no more than 2 characters long
+ % for the sake of vms.
+ %
+ \def\newindex#1{%
+   \iflinks
+     \expandafter\newwrite \csname#1indfile\endcsname
+     \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
+   \fi
+   \expandafter\xdef\csname#1index\endcsname{%     % Define @#1index
+     \noexpand\doindex{#1}}
+ }
+ 
+ % @defindex foo  ==  \newindex{foo}
+ %
+ \def\defindex{\parsearg\newindex}
+ 
+ % Define @defcodeindex, like @defindex except put all entries in @code.
+ %
+ \def\defcodeindex{\parsearg\newcodeindex}
+ %
+ \def\newcodeindex#1{%
+   \iflinks
+     \expandafter\newwrite \csname#1indfile\endcsname
+     \openout \csname#1indfile\endcsname \jobname.#1
+   \fi
+   \expandafter\xdef\csname#1index\endcsname{%
+     \noexpand\docodeindex{#1}}%
+ }
+ 
+ 
+ % @synindex foo bar    makes index foo feed into index bar.
+ % Do this instead of @defindex foo if you don't want it as a separate index.
+ %
+ % @syncodeindex foo bar   similar, but put all entries made for index foo
+ % inside @code.
+ %
+ \def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
+ \def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
+ 
+ % #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
+ % #3 the target index (bar).
+ \def\dosynindex#1#2#3{%
+   % Only do \closeout if we haven't already done it, else we'll end up
+   % closing the target index.
+   \expandafter \ifx\csname donesynindex#2\endcsname \relax
+     % The \closeout helps reduce unnecessary open files; the limit on the
+     % Acorn RISC OS is a mere 16 files.
+     \expandafter\closeout\csname#2indfile\endcsname
+     \expandafter\let\csname donesynindex#2\endcsname = 1
+   \fi
+   % redefine \fooindfile:
+   \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
+   \expandafter\let\csname#2indfile\endcsname=\temp
+   % redefine \fooindex:
+   \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
+ }
+ 
+ % Define \doindex, the driver for all \fooindex macros.
+ % Argument #1 is generated by the calling \fooindex macro,
+ %  and it is "foo", the name of the index.
+ 
+ % \doindex just uses \parsearg; it calls \doind for the actual work.
+ % This is because \doind is more useful to call from other macros.
+ 
+ % There is also \dosubind {index}{topic}{subtopic}
+ % which makes an entry in a two-level index such as the operation index.
+ 
+ \def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
+ \def\singleindexer #1{\doind{\indexname}{#1}}
+ 
+ % like the previous two, but they put @code around the argument.
+ \def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
+ \def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
+ 
+ % Take care of Texinfo commands that can appear in an index entry.
+ % Since there are some commands we want to expand, and others we don't,
+ % we have to laboriously prevent expansion for those that we don't.
+ %
+ \def\indexdummies{%
+   \escapechar = `\\     % use backslash in output files.
+   \def\@{@}% change to @@ when we switch to @ as escape char in index files.
+   \def\ {\realbackslash\space }%
+   %
+   % Need these unexpandable (because we define \tt as a dummy)
+   % definitions when @{ or @} appear in index entry text.  Also, more
+   % complicated, when \tex is in effect and \{ is a \delimiter again.
+   % We can't use \lbracecmd and \rbracecmd because texindex assumes
+   % braces and backslashes are used only as delimiters.  Perhaps we
+   % should define @lbrace and @rbrace commands a la @comma.
+   \def\{{{\tt\char123}}%
+   \def\}{{\tt\char125}}%
+   %
+   % I don't entirely understand this, but when an index entry is
+   % generated from a macro call, the \endinput which \scanmacro inserts
+   % causes processing to be prematurely terminated.  This is,
+   % apparently, because \indexsorttmp is fully expanded, and \endinput
+   % is an expandable command.  The redefinition below makes \endinput
+   % disappear altogether for that purpose -- although logging shows that
+   % processing continues to some further point.  On the other hand, it
+   % seems \endinput does not hurt in the printed index arg, since that
+   % is still getting written without apparent harm.
+   %
+   % Sample source (mac-idx3.tex, reported by Graham Percival to
+   % help-texinfo, 22may06):
+   % @macro funindex {WORD}
+   % @findex xyz
+   % @end macro
+   % ...
+   % @funindex commtest
+   %
+   % The above is not enough to reproduce the bug, but it gives the flavor.
+   %
+   % Sample whatsit resulting:
+   % .@write3{\entry{xyz}{@folio }{@code {xyz@endinput }}}
+   %
+   % So:
+   \let\endinput = \empty
+   %
+   % Do the redefinitions.
+   \commondummies
+ }
+ 
+ % For the aux and toc files, @ is the escape character.  So we want to
+ % redefine everything using @ as the escape character (instead of
+ % \realbackslash, still used for index files).  When everything uses @,
+ % this will be simpler.
+ %
+ \def\atdummies{%
+   \def\@{@@}%
+   \def\ {@ }%
+   \let\{ = \lbraceatcmd
+   \let\} = \rbraceatcmd
+   %
+   % Do the redefinitions.
+   \commondummies
+   \otherbackslash
+ }
+ 
+ % Called from \indexdummies and \atdummies.
+ %
+ \def\commondummies{%
+   %
+   % \definedummyword defines \#1 as \string\#1\space, thus effectively
+   % preventing its expansion.  This is used only for control words,
+   % not control letters, because the \space would be incorrect for
+   % control characters, but is needed to separate the control word
+   % from whatever follows.
+   %
+   % For control letters, we have \definedummyletter, which omits the
+   % space.
+   %
+   % These can be used both for control words that take an argument and
+   % those that do not.  If it is followed by {arg} in the input, then
+   % that will dutifully get written to the index (or wherever).
+   %
+   \def\definedummyword  ##1{\def##1{\string##1\space}}%
+   \def\definedummyletter##1{\def##1{\string##1}}%
+   \let\definedummyaccent\definedummyletter
+   %
+   \commondummiesnofonts
+   %
+   \definedummyletter\_%
+   \definedummyletter\-%
+   %
+   % Non-English letters.
+   \definedummyword\AA
+   \definedummyword\AE
+   \definedummyword\DH
+   \definedummyword\L
+   \definedummyword\O
+   \definedummyword\OE
+   \definedummyword\TH
+   \definedummyword\aa
+   \definedummyword\ae
+   \definedummyword\dh
+   \definedummyword\exclamdown
+   \definedummyword\l
+   \definedummyword\o
+   \definedummyword\oe
+   \definedummyword\ordf
+   \definedummyword\ordm
+   \definedummyword\questiondown
+   \definedummyword\ss
+   \definedummyword\th
+   %
+   % Although these internal commands shouldn't show up, sometimes they do.
+   \definedummyword\bf
+   \definedummyword\gtr
+   \definedummyword\hat
+   \definedummyword\less
+   \definedummyword\sf
+   \definedummyword\sl
+   \definedummyword\tclose
+   \definedummyword\tt
+   %
+   \definedummyword\LaTeX
+   \definedummyword\TeX
+   %
+   % Assorted special characters.
+   \definedummyword\arrow
+   \definedummyword\bullet
+   \definedummyword\comma
+   \definedummyword\copyright
+   \definedummyword\registeredsymbol
+   \definedummyword\dots
+   \definedummyword\enddots
+   \definedummyword\entrybreak
+   \definedummyword\equiv
+   \definedummyword\error
+   \definedummyword\euro
+   \definedummyword\expansion
+   \definedummyword\geq
+   \definedummyword\guillemetleft
+   \definedummyword\guillemetright
+   \definedummyword\guilsinglleft
+   \definedummyword\guilsinglright
+   \definedummyword\lbracechar
+   \definedummyword\leq
+   \definedummyword\minus
+   \definedummyword\ogonek
+   \definedummyword\pounds
+   \definedummyword\point
+   \definedummyword\print
+   \definedummyword\quotedblbase
+   \definedummyword\quotedblleft
+   \definedummyword\quotedblright
+   \definedummyword\quoteleft
+   \definedummyword\quoteright
+   \definedummyword\quotesinglbase
+   \definedummyword\rbracechar
+   \definedummyword\result
+   \definedummyword\textdegree
+   %
+   % We want to disable all macros so that they are not expanded by \write.
+   \macrolist
+   %
+   \normalturnoffactive
+   %
+   % Handle some cases of @value -- where it does not contain any
+   % (non-fully-expandable) commands.
+   \makevalueexpandable
+ }
+ 
+ % \commondummiesnofonts: common to \commondummies and \indexnofonts.
+ %
+ \def\commondummiesnofonts{%
+   % Control letters and accents.
+   \definedummyletter\!%
+   \definedummyaccent\"%
+   \definedummyaccent\'%
+   \definedummyletter\*%
+   \definedummyaccent\,%
+   \definedummyletter\.%
+   \definedummyletter\/%
+   \definedummyletter\:%
+   \definedummyaccent\=%
+   \definedummyletter\?%
+   \definedummyaccent\^%
+   \definedummyaccent\`%
+   \definedummyaccent\~%
+   \definedummyword\u
+   \definedummyword\v
+   \definedummyword\H
+   \definedummyword\dotaccent
+   \definedummyword\ogonek
+   \definedummyword\ringaccent
+   \definedummyword\tieaccent
+   \definedummyword\ubaraccent
+   \definedummyword\udotaccent
+   \definedummyword\dotless
+   %
+   % Texinfo font commands.
+   \definedummyword\b
+   \definedummyword\i
+   \definedummyword\r
+   \definedummyword\sansserif
+   \definedummyword\sc
+   \definedummyword\slanted
+   \definedummyword\t
+   %
+   % Commands that take arguments.
+   \definedummyword\abbr
+   \definedummyword\acronym
+   \definedummyword\anchor
+   \definedummyword\cite
+   \definedummyword\code
+   \definedummyword\command
+   \definedummyword\dfn
+   \definedummyword\dmn
+   \definedummyword\email
+   \definedummyword\emph
+   \definedummyword\env
+   \definedummyword\file
+   \definedummyword\image
+   \definedummyword\indicateurl
+   \definedummyword\inforef
+   \definedummyword\kbd
+   \definedummyword\key
+   \definedummyword\math
+   \definedummyword\option
+   \definedummyword\pxref
+   \definedummyword\ref
+   \definedummyword\samp
+   \definedummyword\strong
+   \definedummyword\tie
+   \definedummyword\uref
+   \definedummyword\url
+   \definedummyword\var
+   \definedummyword\verb
+   \definedummyword\w
+   \definedummyword\xref
+ }
+ 
+ % \indexnofonts is used when outputting the strings to sort the index
+ % by, and when constructing control sequence names.  It eliminates all
+ % control sequences and just writes whatever the best ASCII sort string
+ % would be for a given command (usually its argument).
+ %
+ \def\indexnofonts{%
+   % Accent commands should become @asis.
+   \def\definedummyaccent##1{\let##1\asis}%
+   % We can just ignore other control letters.
+   \def\definedummyletter##1{\let##1\empty}%
+   % All control words become @asis by default; overrides below.
+   \let\definedummyword\definedummyaccent
+   %
+   \commondummiesnofonts
+   %
+   % Don't no-op \tt, since it isn't a user-level command
+   % and is used in the definitions of the active chars like <, >, |, etc.
+   % Likewise with the other plain tex font commands.
+   %\let\tt=\asis
+   %
+   \def\ { }%
+   \def\@{@}%
+   \def\_{\normalunderscore}%
+   \def\-{}% @- shouldn't affect sorting
+   %
+   % Unfortunately, texindex is not prepared to handle braces in the
+   % content at all.  So for index sorting, we map @{ and @} to strings
+   % starting with |, since that ASCII character is between ASCII { and }.
+   \def\{{|a}%
+   \def\lbracechar{|a}%
+   %
+   \def\}{|b}%
+   \def\rbracechar{|b}%
+   %
+   % Non-English letters.
+   \def\AA{AA}%
+   \def\AE{AE}%
+   \def\DH{DZZ}%
+   \def\L{L}%
+   \def\OE{OE}%
+   \def\O{O}%
+   \def\TH{ZZZ}%
+   \def\aa{aa}%
+   \def\ae{ae}%
+   \def\dh{dzz}%
+   \def\exclamdown{!}%
+   \def\l{l}%
+   \def\oe{oe}%
+   \def\ordf{a}%
+   \def\ordm{o}%
+   \def\o{o}%
+   \def\questiondown{?}%
+   \def\ss{ss}%
+   \def\th{zzz}%
+   %
+   \def\LaTeX{LaTeX}%
+   \def\TeX{TeX}%
+   %
+   % Assorted special characters.
+   % (The following {} will end up in the sort string, but that's ok.)
+   \def\arrow{->}%
+   \def\bullet{bullet}%
+   \def\comma{,}%
+   \def\copyright{copyright}%
+   \def\dots{...}%
+   \def\enddots{...}%
+   \def\equiv{==}%
+   \def\error{error}%
+   \def\euro{euro}%
+   \def\expansion{==>}%
+   \def\geq{>=}%
+   \def\guillemetleft{<<}%
+   \def\guillemetright{>>}%
+   \def\guilsinglleft{<}%
+   \def\guilsinglright{>}%
+   \def\leq{<=}%
+   \def\minus{-}%
+   \def\point{.}%
+   \def\pounds{pounds}%
+   \def\print{-|}%
+   \def\quotedblbase{"}%
+   \def\quotedblleft{"}%
+   \def\quotedblright{"}%
+   \def\quoteleft{`}%
+   \def\quoteright{'}%
+   \def\quotesinglbase{,}%
+   \def\registeredsymbol{R}%
+   \def\result{=>}%
+   \def\textdegree{o}%
+   %
+   \expandafter\ifx\csname SETtxiindexlquoteignore\endcsname\relax
+   \else \indexlquoteignore \fi
+   %
+   % We need to get rid of all macros, leaving only the arguments (if present).
+   % Of course this is not nearly correct, but it is the best we can do for now.
+   % makeinfo does not expand macros in the argument to @deffn, which ends up
+   % writing an index entry, and texindex isn't prepared for an index sort entry
+   % that starts with \.
+   %
+   % Since macro invocations are followed by braces, we can just redefine them
+   % to take a single TeX argument.  The case of a macro invocation that
+   % goes to end-of-line is not handled.
+   %
+   \macrolist
+ }
+ 
+ % Undocumented (for FSFS 2nd ed.): @set txiindexlquoteignore makes us
+ % ignore left quotes in the sort term.
+ {\catcode`\`=\active
+  \gdef\indexlquoteignore{\let`=\empty}}
+ 
+ \let\indexbackslash=0  %overridden during \printindex.
+ \let\SETmarginindex=\relax % put index entries in margin (undocumented)?
+ 
+ % Most index entries go through here, but \dosubind is the general case.
+ % #1 is the index name, #2 is the entry text.
+ \def\doind#1#2{\dosubind{#1}{#2}{}}
+ 
+ % Workhorse for all \fooindexes.
+ % #1 is name of index, #2 is stuff to put there, #3 is subentry --
+ % empty if called from \doind, as we usually are (the main exception
+ % is with most defuns, which call us directly).
+ %
+ \def\dosubind#1#2#3{%
+   \iflinks
+   {%
+     % Store the main index entry text (including the third arg).
+     \toks0 = {#2}%
+     % If third arg is present, precede it with a space.
+     \def\thirdarg{#3}%
+     \ifx\thirdarg\empty \else
+       \toks0 = \expandafter{\the\toks0 \space #3}%
+     \fi
+     %
+     \edef\writeto{\csname#1indfile\endcsname}%
+     %
+     \safewhatsit\dosubindwrite
+   }%
+   \fi
+ }
+ 
+ % Write the entry in \toks0 to the index file:
+ %
+ \def\dosubindwrite{%
+   % Put the index entry in the margin if desired.
+   \ifx\SETmarginindex\relax\else
+     \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
+   \fi
+   %
+   % Remember, we are within a group.
+   \indexdummies % Must do this here, since \bf, etc expand at this stage
+   \def\backslashcurfont{\indexbackslash}% \indexbackslash isn't defined now
+       % so it will be output as is; and it will print as backslash.
+   %
+   % Process the index entry with all font commands turned off, to
+   % get the string to sort by.
+   {\indexnofonts
+    \edef\temp{\the\toks0}% need full expansion
+    \xdef\indexsorttmp{\temp}%
+   }%
+   %
+   % Set up the complete index entry, with both the sort key and
+   % the original text, including any font commands.  We write
+   % three arguments to \entry to the .?? file (four in the
+   % subentry case), texindex reduces to two when writing the .??s
+   % sorted result.
+   \edef\temp{%
+     \write\writeto{%
+       \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
+   }%
+   \temp
+ }
+ 
+ % Take care of unwanted page breaks/skips around a whatsit:
+ %
+ % If a skip is the last thing on the list now, preserve it
+ % by backing up by \lastskip, doing the \write, then inserting
+ % the skip again.  Otherwise, the whatsit generated by the
+ % \write or \pdfdest will make \lastskip zero.  The result is that
+ % sequences like this:
+ % @end defun
+ % @tindex whatever
+ % @defun ...
+ % will have extra space inserted, because the \medbreak in the
+ % start of the @defun won't see the skip inserted by the @end of
+ % the previous defun.
+ %
+ % But don't do any of this if we're not in vertical mode.  We
+ % don't want to do a \vskip and prematurely end a paragraph.
+ %
+ % Avoid page breaks due to these extra skips, too.
+ %
+ % But wait, there is a catch there:
+ % We'll have to check whether \lastskip is zero skip.  \ifdim is not
+ % sufficient for this purpose, as it ignores stretch and shrink parts
+ % of the skip.  The only way seems to be to check the textual
+ % representation of the skip.
+ %
+ % The following is almost like \def\zeroskipmacro{0.0pt} except that
+ % the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
+ %
+ \edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
+ %
+ \newskip\whatsitskip
+ \newcount\whatsitpenalty
+ %
+ % ..., ready, GO:
+ %
+ \def\safewhatsit#1{\ifhmode
+   #1%
+  \else
+   % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
+   \whatsitskip = \lastskip
+   \edef\lastskipmacro{\the\lastskip}%
+   \whatsitpenalty = \lastpenalty
+   %
+   % If \lastskip is nonzero, that means the last item was a
+   % skip.  And since a skip is discardable, that means this
+   % -\whatsitskip glue we're inserting is preceded by a
+   % non-discardable item, therefore it is not a potential
+   % breakpoint, therefore no \nobreak needed.
+   \ifx\lastskipmacro\zeroskipmacro
+   \else
+     \vskip-\whatsitskip
+   \fi
+   %
+   #1%
+   %
+   \ifx\lastskipmacro\zeroskipmacro
+     % If \lastskip was zero, perhaps the last item was a penalty, and
+     % perhaps it was >=10000, e.g., a \nobreak.  In that case, we want
+     % to re-insert the same penalty (values >10000 are used for various
+     % signals); since we just inserted a non-discardable item, any
+     % following glue (such as a \parskip) would be a breakpoint.  For example:
+     %   @deffn deffn-whatever
+     %   @vindex index-whatever
+     %   Description.
+     % would allow a break between the index-whatever whatsit
+     % and the "Description." paragraph.
+     \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
+   \else
+     % On the other hand, if we had a nonzero \lastskip,
+     % this make-up glue would be preceded by a non-discardable item
+     % (the whatsit from the \write), so we must insert a \nobreak.
+     \nobreak\vskip\whatsitskip
+   \fi
+ \fi}
+ 
+ % The index entry written in the file actually looks like
+ %  \entry {sortstring}{page}{topic}
+ % or
+ %  \entry {sortstring}{page}{topic}{subtopic}
+ % The texindex program reads in these files and writes files
+ % containing these kinds of lines:
+ %  \initial {c}
+ %     before the first topic whose initial is c
+ %  \entry {topic}{pagelist}
+ %     for a topic that is used without subtopics
+ %  \primary {topic}
+ %     for the beginning of a topic that is used with subtopics
+ %  \secondary {subtopic}{pagelist}
+ %     for each subtopic.
+ 
+ % Define the user-accessible indexing commands
+ % @findex, @vindex, @kindex, @cindex.
+ 
+ \def\findex {\fnindex}
+ \def\kindex {\kyindex}
+ \def\cindex {\cpindex}
+ \def\vindex {\vrindex}
+ \def\tindex {\tpindex}
+ \def\pindex {\pgindex}
+ 
+ \def\cindexsub {\begingroup\obeylines\cindexsub}
+ {\obeylines %
+ \gdef\cindexsub "#1" #2^^M{\endgroup %
+ \dosubind{cp}{#2}{#1}}}
+ 
+ % Define the macros used in formatting output of the sorted index material.
+ 
+ % @printindex causes a particular index (the ??s file) to get printed.
+ % It does not print any chapter heading (usually an @unnumbered).
+ %
+ \parseargdef\printindex{\begingroup
+   \dobreak \chapheadingskip{10000}%
+   %
+   \smallfonts \rm
+   \tolerance = 9500
+   \plainfrenchspacing
+   \everypar = {}% don't want the \kern\-parindent from indentation suppression.
+   %
+   % See if the index file exists and is nonempty.
+   % Change catcode of @ here so that if the index file contains
+   % \initial {@}
+   % as its first line, TeX doesn't complain about mismatched braces
+   % (because it thinks @} is a control sequence).
+   \catcode`\@ = 11
+   \openin 1 \jobname.#1s
+   \ifeof 1
+     % \enddoublecolumns gets confused if there is no text in the index,
+     % and it loses the chapter title and the aux file entries for the
+     % index.  The easiest way to prevent this problem is to make sure
+     % there is some text.
+     \putwordIndexNonexistent
+   \else
+     %
+     % If the index file exists but is empty, then \openin leaves \ifeof
+     % false.  We have to make TeX try to read something from the file, so
+     % it can discover if there is anything in it.
+     \read 1 to \temp
+     \ifeof 1
+       \putwordIndexIsEmpty
+     \else
+       % Index files are almost Texinfo source, but we use \ as the escape
+       % character.  It would be better to use @, but that's too big a change
+       % to make right now.
+       \def\indexbackslash{\backslashcurfont}%
+       \catcode`\\ = 0
+       \escapechar = `\\
+       \begindoublecolumns
+       \input \jobname.#1s
+       \enddoublecolumns
+     \fi
+   \fi
+   \closein 1
+ \endgroup}
+ 
+ % These macros are used by the sorted index file itself.
+ % Change them to control the appearance of the index.
+ 
+ \def\initial#1{{%
+   % Some minor font changes for the special characters.
+   \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
+   %
+   % Remove any glue we may have, we'll be inserting our own.
+   \removelastskip
+   %
+   % We like breaks before the index initials, so insert a bonus.
+   \nobreak
+   \vskip 0pt plus 3\baselineskip
+   \penalty 0
+   \vskip 0pt plus -3\baselineskip
+   %
+   % Typeset the initial.  Making this add up to a whole number of
+   % baselineskips increases the chance of the dots lining up from column
+   % to column.  It still won't often be perfect, because of the stretch
+   % we need before each entry, but it's better.
+   %
+   % No shrink because it confuses \balancecolumns.
+   \vskip 1.67\baselineskip plus .5\baselineskip
+   \leftline{\secbf #1}%
+   % Do our best not to break after the initial.
+   \nobreak
+   \vskip .33\baselineskip plus .1\baselineskip
+ }}
+ 
+ % \entry typesets a paragraph consisting of the text (#1), dot leaders, and
+ % then page number (#2) flushed to the right margin.  It is used for index
+ % and table of contents entries.  The paragraph is indented by \leftskip.
+ %
+ % A straightforward implementation would start like this:
+ %	\def\entry#1#2{...
+ % But this freezes the catcodes in the argument, and can cause problems to
+ % @code, which sets - active.  This problem was fixed by a kludge---
+ % ``-'' was active throughout whole index, but this isn't really right.
+ % The right solution is to prevent \entry from swallowing the whole text.
+ %                                 --kasal, 21nov03
+ \def\entry{%
+   \begingroup
+     %
+     % Start a new paragraph if necessary, so our assignments below can't
+     % affect previous text.
+     \par
+     %
+     % Do not fill out the last line with white space.
+     \parfillskip = 0in
+     %
+     % No extra space above this paragraph.
+     \parskip = 0in
+     %
+     % Do not prefer a separate line ending with a hyphen to fewer lines.
+     \finalhyphendemerits = 0
+     %
+     % \hangindent is only relevant when the entry text and page number
+     % don't both fit on one line.  In that case, bob suggests starting the
+     % dots pretty far over on the line.  Unfortunately, a large
+     % indentation looks wrong when the entry text itself is broken across
+     % lines.  So we use a small indentation and put up with long leaders.
+     %
+     % \hangafter is reset to 1 (which is the value we want) at the start
+     % of each paragraph, so we need not do anything with that.
+     \hangindent = 2em
+     %
+     % When the entry text needs to be broken, just fill out the first line
+     % with blank space.
+     \rightskip = 0pt plus1fil
+     %
+     % A bit of stretch before each entry for the benefit of balancing
+     % columns.
+     \vskip 0pt plus1pt
+     %
+     % When reading the text of entry, convert explicit line breaks
+     % from @* into spaces.  The user might give these in long section
+     % titles, for instance.
+     \def\*{\unskip\space\ignorespaces}%
+     \def\entrybreak{\hfil\break}%
+     %
+     % Swallow the left brace of the text (first parameter):
+     \afterassignment\doentry
+     \let\temp =
+ }
+ \def\entrybreak{\unskip\space\ignorespaces}%
+ \def\doentry{%
+     \bgroup % Instead of the swallowed brace.
+       \noindent
+       \aftergroup\finishentry
+       % And now comes the text of the entry.
+ }
+ \def\finishentry#1{%
+     % #1 is the page number.
+     %
+     % The following is kludged to not output a line of dots in the index if
+     % there are no page numbers.  The next person who breaks this will be
+     % cursed by a Unix daemon.
+     \setbox\boxA = \hbox{#1}%
+     \ifdim\wd\boxA = 0pt
+       \ %
+     \else
+       %
+       % If we must, put the page number on a line of its own, and fill out
+       % this line with blank space.  (The \hfil is overwhelmed with the
+       % fill leaders glue in \indexdotfill if the page number does fit.)
+       \hfil\penalty50
+       \null\nobreak\indexdotfill % Have leaders before the page number.
+       %
+       % The `\ ' here is removed by the implicit \unskip that TeX does as
+       % part of (the primitive) \par.  Without it, a spurious underfull
+       % \hbox ensues.
+       \ifpdf
+ 	\pdfgettoks#1.%
+ 	\ \the\toksA
+       \else
+ 	\ #1%
+       \fi
+     \fi
+     \par
+   \endgroup
+ }
+ 
+ % Like plain.tex's \dotfill, except uses up at least 1 em.
+ \def\indexdotfill{\cleaders
+   \hbox{$\mathsurround=0pt \mkern1.5mu.\mkern1.5mu$}\hskip 1em plus 1fill}
+ 
+ \def\primary #1{\line{#1\hfil}}
+ 
+ \newskip\secondaryindent \secondaryindent=0.5cm
+ \def\secondary#1#2{{%
+   \parfillskip=0in
+   \parskip=0in
+   \hangindent=1in
+   \hangafter=1
+   \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
+   \ifpdf
+     \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
+   \else
+     #2
+   \fi
+   \par
+ }}
+ 
+ % Define two-column mode, which we use to typeset indexes.
+ % Adapted from the TeXbook, page 416, which is to say,
+ % the manmac.tex format used to print the TeXbook itself.
+ \catcode`\@=11
+ 
+ \newbox\partialpage
+ \newdimen\doublecolumnhsize
+ 
+ \def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
+   % Grab any single-column material above us.
+   \output = {%
+     %
+     % Here is a possibility not foreseen in manmac: if we accumulate a
+     % whole lot of material, we might end up calling this \output
+     % routine twice in a row (see the doublecol-lose test, which is
+     % essentially a couple of indexes with @setchapternewpage off).  In
+     % that case we just ship out what is in \partialpage with the normal
+     % output routine.  Generally, \partialpage will be empty when this
+     % runs and this will be a no-op.  See the indexspread.tex test case.
+     \ifvoid\partialpage \else
+       \onepageout{\pagecontents\partialpage}%
+     \fi
+     %
+     \global\setbox\partialpage = \vbox{%
+       % Unvbox the main output page.
+       \unvbox\PAGE
+       \kern-\topskip \kern\baselineskip
+     }%
+   }%
+   \eject % run that output routine to set \partialpage
+   %
+   % Use the double-column output routine for subsequent pages.
+   \output = {\doublecolumnout}%
+   %
+   % Change the page size parameters.  We could do this once outside this
+   % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
+   % format, but then we repeat the same computation.  Repeating a couple
+   % of assignments once per index is clearly meaningless for the
+   % execution time, so we may as well do it in one place.
+   %
+   % First we halve the line length, less a little for the gutter between
+   % the columns.  We compute the gutter based on the line length, so it
+   % changes automatically with the paper format.  The magic constant
+   % below is chosen so that the gutter has the same value (well, +-<1pt)
+   % as it did when we hard-coded it.
+   %
+   % We put the result in a separate register, \doublecolumhsize, so we
+   % can restore it in \pagesofar, after \hsize itself has (potentially)
+   % been clobbered.
+   %
+   \doublecolumnhsize = \hsize
+     \advance\doublecolumnhsize by -.04154\hsize
+     \divide\doublecolumnhsize by 2
+   \hsize = \doublecolumnhsize
+   %
+   % Double the \vsize as well.  (We don't need a separate register here,
+   % since nobody clobbers \vsize.)
+   \vsize = 2\vsize
+ }
+ 
+ % The double-column output routine for all double-column pages except
+ % the last.
+ %
+ \def\doublecolumnout{%
+   \splittopskip=\topskip \splitmaxdepth=\maxdepth
+   % Get the available space for the double columns -- the normal
+   % (undoubled) page height minus any material left over from the
+   % previous page.
+   \dimen@ = \vsize
+   \divide\dimen@ by 2
+   \advance\dimen@ by -\ht\partialpage
+   %
+   % box0 will be the left-hand column, box2 the right.
+   \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
+   \onepageout\pagesofar
+   \unvbox255
+   \penalty\outputpenalty
+ }
+ %
+ % Re-output the contents of the output page -- any previous material,
+ % followed by the two boxes we just split, in box0 and box2.
+ \def\pagesofar{%
+   \unvbox\partialpage
+   %
+   \hsize = \doublecolumnhsize
+   \wd0=\hsize \wd2=\hsize
+   \hbox to\pagewidth{\box0\hfil\box2}%
+ }
+ %
+ % All done with double columns.
+ \def\enddoublecolumns{%
+   % The following penalty ensures that the page builder is exercised
+   % _before_ we change the output routine.  This is necessary in the
+   % following situation:
+   %
+   % The last section of the index consists only of a single entry.
+   % Before this section, \pagetotal is less than \pagegoal, so no
+   % break occurs before the last section starts.  However, the last
+   % section, consisting of \initial and the single \entry, does not
+   % fit on the page and has to be broken off.  Without the following
+   % penalty the page builder will not be exercised until \eject
+   % below, and by that time we'll already have changed the output
+   % routine to the \balancecolumns version, so the next-to-last
+   % double-column page will be processed with \balancecolumns, which
+   % is wrong:  The two columns will go to the main vertical list, with
+   % the broken-off section in the recent contributions.  As soon as
+   % the output routine finishes, TeX starts reconsidering the page
+   % break.  The two columns and the broken-off section both fit on the
+   % page, because the two columns now take up only half of the page
+   % goal.  When TeX sees \eject from below which follows the final
+   % section, it invokes the new output routine that we've set after
+   % \balancecolumns below; \onepageout will try to fit the two columns
+   % and the final section into the vbox of \pageheight (see
+   % \pagebody), causing an overfull box.
+   %
+   % Note that glue won't work here, because glue does not exercise the
+   % page builder, unlike penalties (see The TeXbook, pp. 280-281).
+   \penalty0
+   %
+   \output = {%
+     % Split the last of the double-column material.  Leave it on the
+     % current page, no automatic page break.
+     \balancecolumns
+     %
+     % If we end up splitting too much material for the current page,
+     % though, there will be another page break right after this \output
+     % invocation ends.  Having called \balancecolumns once, we do not
+     % want to call it again.  Therefore, reset \output to its normal
+     % definition right away.  (We hope \balancecolumns will never be
+     % called on to balance too much material, but if it is, this makes
+     % the output somewhat more palatable.)
+     \global\output = {\onepageout{\pagecontents\PAGE}}%
+   }%
+   \eject
+   \endgroup % started in \begindoublecolumns
+   %
+   % \pagegoal was set to the doubled \vsize above, since we restarted
+   % the current page.  We're now back to normal single-column
+   % typesetting, so reset \pagegoal to the normal \vsize (after the
+   % \endgroup where \vsize got restored).
+   \pagegoal = \vsize
+ }
+ %
+ % Called at the end of the double column material.
+ \def\balancecolumns{%
+   \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
+   \dimen@ = \ht0
+   \advance\dimen@ by \topskip
+   \advance\dimen@ by-\baselineskip
+   \divide\dimen@ by 2 % target to split to
+   %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
+   \splittopskip = \topskip
+   % Loop until we get a decent breakpoint.
+   {%
+     \vbadness = 10000
+     \loop
+       \global\setbox3 = \copy0
+       \global\setbox1 = \vsplit3 to \dimen@
+     \ifdim\ht3>\dimen@
+       \global\advance\dimen@ by 1pt
+     \repeat
+   }%
+   %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
+   \setbox0=\vbox to\dimen@{\unvbox1}%
+   \setbox2=\vbox to\dimen@{\unvbox3}%
+   %
+   \pagesofar
+ }
+ \catcode`\@ = \other
+ 
+ 
+ \message{sectioning,}
+ % Chapters, sections, etc.
+ 
+ % Let's start with @part.
+ \outer\parseargdef\part{\partzzz{#1}}
+ \def\partzzz#1{%
+   \chapoddpage
+   \null
+   \vskip.3\vsize  % move it down on the page a bit
+   \begingroup
+     \noindent \titlefonts\rmisbold #1\par % the text
+     \let\lastnode=\empty      % no node to associate with
+     \writetocentry{part}{#1}{}% but put it in the toc
+     \headingsoff              % no headline or footline on the part page
+     \chapoddpage
+   \endgroup
+ }
+ 
+ % \unnumberedno is an oxymoron.  But we count the unnumbered
+ % sections so that we can refer to them unambiguously in the pdf
+ % outlines by their "section number".  We avoid collisions with chapter
+ % numbers by starting them at 10000.  (If a document ever has 10000
+ % chapters, we're in trouble anyway, I'm sure.)
+ \newcount\unnumberedno \unnumberedno = 10000
+ \newcount\chapno
+ \newcount\secno        \secno=0
+ \newcount\subsecno     \subsecno=0
+ \newcount\subsubsecno  \subsubsecno=0
+ 
+ % This counter is funny since it counts through charcodes of letters A, B, ...
+ \newcount\appendixno  \appendixno = `\@
+ %
+ % \def\appendixletter{\char\the\appendixno}
+ % We do the following ugly conditional instead of the above simple
+ % construct for the sake of pdftex, which needs the actual
+ % letter in the expansion, not just typeset.
+ %
+ \def\appendixletter{%
+   \ifnum\appendixno=`A A%
+   \else\ifnum\appendixno=`B B%
+   \else\ifnum\appendixno=`C C%
+   \else\ifnum\appendixno=`D D%
+   \else\ifnum\appendixno=`E E%
+   \else\ifnum\appendixno=`F F%
+   \else\ifnum\appendixno=`G G%
+   \else\ifnum\appendixno=`H H%
+   \else\ifnum\appendixno=`I I%
+   \else\ifnum\appendixno=`J J%
+   \else\ifnum\appendixno=`K K%
+   \else\ifnum\appendixno=`L L%
+   \else\ifnum\appendixno=`M M%
+   \else\ifnum\appendixno=`N N%
+   \else\ifnum\appendixno=`O O%
+   \else\ifnum\appendixno=`P P%
+   \else\ifnum\appendixno=`Q Q%
+   \else\ifnum\appendixno=`R R%
+   \else\ifnum\appendixno=`S S%
+   \else\ifnum\appendixno=`T T%
+   \else\ifnum\appendixno=`U U%
+   \else\ifnum\appendixno=`V V%
+   \else\ifnum\appendixno=`W W%
+   \else\ifnum\appendixno=`X X%
+   \else\ifnum\appendixno=`Y Y%
+   \else\ifnum\appendixno=`Z Z%
+   % The \the is necessary, despite appearances, because \appendixletter is
+   % expanded while writing the .toc file.  \char\appendixno is not
+   % expandable, thus it is written literally, thus all appendixes come out
+   % with the same letter (or @) in the toc without it.
+   \else\char\the\appendixno
+   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
+ 
+ % Each @chapter defines these (using marks) as the number+name, number
+ % and name of the chapter.  Page headings and footings can use
+ % these.  @section does likewise.
+ \def\thischapter{}
+ \def\thischapternum{}
+ \def\thischaptername{}
+ \def\thissection{}
+ \def\thissectionnum{}
+ \def\thissectionname{}
+ 
+ \newcount\absseclevel % used to calculate proper heading level
+ \newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
+ 
+ % @raisesections: treat @section as chapter, @subsection as section, etc.
+ \def\raisesections{\global\advance\secbase by -1}
+ \let\up=\raisesections % original BFox name
+ 
+ % @lowersections: treat @chapter as section, @section as subsection, etc.
+ \def\lowersections{\global\advance\secbase by 1}
+ \let\down=\lowersections % original BFox name
+ 
+ % we only have subsub.
+ \chardef\maxseclevel = 3
+ %
+ % A numbered section within an unnumbered changes to unnumbered too.
+ % To achieve this, remember the "biggest" unnum. sec. we are currently in:
+ \chardef\unnlevel = \maxseclevel
+ %
+ % Trace whether the current chapter is an appendix or not:
+ % \chapheadtype is "N" or "A", unnumbered chapters are ignored.
+ \def\chapheadtype{N}
+ 
+ % Choose a heading macro
+ % #1 is heading type
+ % #2 is heading level
+ % #3 is text for heading
+ \def\genhead#1#2#3{%
+   % Compute the abs. sec. level:
+   \absseclevel=#2
+   \advance\absseclevel by \secbase
+   % Make sure \absseclevel doesn't fall outside the range:
+   \ifnum \absseclevel < 0
+     \absseclevel = 0
+   \else
+     \ifnum \absseclevel > 3
+       \absseclevel = 3
+     \fi
+   \fi
+   % The heading type:
+   \def\headtype{#1}%
+   \if \headtype U%
+     \ifnum \absseclevel < \unnlevel
+       \chardef\unnlevel = \absseclevel
+     \fi
+   \else
+     % Check for appendix sections:
+     \ifnum \absseclevel = 0
+       \edef\chapheadtype{\headtype}%
+     \else
+       \if \headtype A\if \chapheadtype N%
+ 	\errmessage{@appendix... within a non-appendix chapter}%
+       \fi\fi
+     \fi
+     % Check for numbered within unnumbered:
+     \ifnum \absseclevel > \unnlevel
+       \def\headtype{U}%
+     \else
+       \chardef\unnlevel = 3
+     \fi
+   \fi
+   % Now print the heading:
+   \if \headtype U%
+     \ifcase\absseclevel
+ 	\unnumberedzzz{#3}%
+     \or \unnumberedseczzz{#3}%
+     \or \unnumberedsubseczzz{#3}%
+     \or \unnumberedsubsubseczzz{#3}%
+     \fi
+   \else
+     \if \headtype A%
+       \ifcase\absseclevel
+ 	  \appendixzzz{#3}%
+       \or \appendixsectionzzz{#3}%
+       \or \appendixsubseczzz{#3}%
+       \or \appendixsubsubseczzz{#3}%
+       \fi
+     \else
+       \ifcase\absseclevel
+ 	  \chapterzzz{#3}%
+       \or \seczzz{#3}%
+       \or \numberedsubseczzz{#3}%
+       \or \numberedsubsubseczzz{#3}%
+       \fi
+     \fi
+   \fi
+   \suppressfirstparagraphindent
+ }
+ 
+ % an interface:
+ \def\numhead{\genhead N}
+ \def\apphead{\genhead A}
+ \def\unnmhead{\genhead U}
+ 
+ % @chapter, @appendix, @unnumbered.  Increment top-level counter, reset
+ % all lower-level sectioning counters to zero.
+ %
+ % Also set \chaplevelprefix, which we prepend to @float sequence numbers
+ % (e.g., figures), q.v.  By default (before any chapter), that is empty.
+ \let\chaplevelprefix = \empty
+ %
+ \outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
+ \def\chapterzzz#1{%
+   % section resetting is \global in case the chapter is in a group, such
+   % as an @include file.
+   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+     \global\advance\chapno by 1
+   %
+   % Used for \float.
+   \gdef\chaplevelprefix{\the\chapno.}%
+   \resetallfloatnos
+   %
+   % \putwordChapter can contain complex things in translations.
+   \toks0=\expandafter{\putwordChapter}%
+   \message{\the\toks0 \space \the\chapno}%
+   %
+   % Write the actual heading.
+   \chapmacro{#1}{Ynumbered}{\the\chapno}%
+   %
+   % So @section and the like are numbered underneath this chapter.
+   \global\let\section = \numberedsec
+   \global\let\subsection = \numberedsubsec
+   \global\let\subsubsection = \numberedsubsubsec
+ }
+ 
+ \outer\parseargdef\appendix{\apphead0{#1}} % normally calls appendixzzz
+ %
+ \def\appendixzzz#1{%
+   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+     \global\advance\appendixno by 1
+   \gdef\chaplevelprefix{\appendixletter.}%
+   \resetallfloatnos
+   %
+   % \putwordAppendix can contain complex things in translations.
+   \toks0=\expandafter{\putwordAppendix}%
+   \message{\the\toks0 \space \appendixletter}%
+   %
+   \chapmacro{#1}{Yappendix}{\appendixletter}%
+   %
+   \global\let\section = \appendixsec
+   \global\let\subsection = \appendixsubsec
+   \global\let\subsubsection = \appendixsubsubsec
+ }
+ 
+ % normally unnmhead0 calls unnumberedzzz:
+ \outer\parseargdef\unnumbered{\unnmhead0{#1}}
+ \def\unnumberedzzz#1{%
+   \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+     \global\advance\unnumberedno by 1
+   %
+   % Since an unnumbered has no number, no prefix for figures.
+   \global\let\chaplevelprefix = \empty
+   \resetallfloatnos
+   %
+   % This used to be simply \message{#1}, but TeX fully expands the
+   % argument to \message.  Therefore, if #1 contained @-commands, TeX
+   % expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
+   % expanded @cite (which turns out to cause errors because \cite is meant
+   % to be executed, not expanded).
+   %
+   % Anyway, we don't want the fully-expanded definition of @cite to appear
+   % as a result of the \message, we just want `@cite' itself.  We use
+   % \the<toks register> to achieve this: TeX expands \the<toks> only once,
+   % simply yielding the contents of <toks register>.  (We also do this for
+   % the toc entries.)
+   \toks0 = {#1}%
+   \message{(\the\toks0)}%
+   %
+   \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
+   %
+   \global\let\section = \unnumberedsec
+   \global\let\subsection = \unnumberedsubsec
+   \global\let\subsubsection = \unnumberedsubsubsec
+ }
+ 
+ % @centerchap is like @unnumbered, but the heading is centered.
+ \outer\parseargdef\centerchap{%
+   % Well, we could do the following in a group, but that would break
+   % an assumption that \chapmacro is called at the outermost level.
+   % Thus we are safer this way:		--kasal, 24feb04
+   \let\centerparametersmaybe = \centerparameters
+   \unnmhead0{#1}%
+   \let\centerparametersmaybe = \relax
+ }
+ 
+ % @top is like @unnumbered.
+ \let\top\unnumbered
+ 
+ % Sections.
+ % 
+ \outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
+ \def\seczzz#1{%
+   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+   \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
+ }
+ 
+ % normally calls appendixsectionzzz:
+ \outer\parseargdef\appendixsection{\apphead1{#1}}
+ \def\appendixsectionzzz#1{%
+   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+   \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
+ }
+ \let\appendixsec\appendixsection
+ 
+ % normally calls unnumberedseczzz:
+ \outer\parseargdef\unnumberedsec{\unnmhead1{#1}}
+ \def\unnumberedseczzz#1{%
+   \global\subsecno=0 \global\subsubsecno=0  \global\advance\secno by 1
+   \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
+ }
+ 
+ % Subsections.
+ % 
+ % normally calls numberedsubseczzz:
+ \outer\parseargdef\numberedsubsec{\numhead2{#1}}
+ \def\numberedsubseczzz#1{%
+   \global\subsubsecno=0  \global\advance\subsecno by 1
+   \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
+ }
+ 
+ % normally calls appendixsubseczzz:
+ \outer\parseargdef\appendixsubsec{\apphead2{#1}}
+ \def\appendixsubseczzz#1{%
+   \global\subsubsecno=0  \global\advance\subsecno by 1
+   \sectionheading{#1}{subsec}{Yappendix}%
+                  {\appendixletter.\the\secno.\the\subsecno}%
+ }
+ 
+ % normally calls unnumberedsubseczzz:
+ \outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}}
+ \def\unnumberedsubseczzz#1{%
+   \global\subsubsecno=0  \global\advance\subsecno by 1
+   \sectionheading{#1}{subsec}{Ynothing}%
+                  {\the\unnumberedno.\the\secno.\the\subsecno}%
+ }
+ 
+ % Subsubsections.
+ % 
+ % normally numberedsubsubseczzz:
+ \outer\parseargdef\numberedsubsubsec{\numhead3{#1}}
+ \def\numberedsubsubseczzz#1{%
+   \global\advance\subsubsecno by 1
+   \sectionheading{#1}{subsubsec}{Ynumbered}%
+                  {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
+ }
+ 
+ % normally appendixsubsubseczzz:
+ \outer\parseargdef\appendixsubsubsec{\apphead3{#1}}
+ \def\appendixsubsubseczzz#1{%
+   \global\advance\subsubsecno by 1
+   \sectionheading{#1}{subsubsec}{Yappendix}%
+                  {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
+ }
+ 
+ % normally unnumberedsubsubseczzz:
+ \outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}}
+ \def\unnumberedsubsubseczzz#1{%
+   \global\advance\subsubsecno by 1
+   \sectionheading{#1}{subsubsec}{Ynothing}%
+                  {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
+ }
+ 
+ % These macros control what the section commands do, according
+ % to what kind of chapter we are in (ordinary, appendix, or unnumbered).
+ % Define them by default for a numbered chapter.
+ \let\section = \numberedsec
+ \let\subsection = \numberedsubsec
+ \let\subsubsection = \numberedsubsubsec
+ 
+ % Define @majorheading, @heading and @subheading
+ 
+ \def\majorheading{%
+   {\advance\chapheadingskip by 10pt \chapbreak }%
+   \parsearg\chapheadingzzz
+ }
+ 
+ \def\chapheading{\chapbreak \parsearg\chapheadingzzz}
+ \def\chapheadingzzz#1{%
+   \vbox{\chapfonts \raggedtitlesettings #1\par}%
+   \nobreak\bigskip \nobreak
+   \suppressfirstparagraphindent
+ }
+ 
+ % @heading, @subheading, @subsubheading.
+ \parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
+   \suppressfirstparagraphindent}
+ \parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
+   \suppressfirstparagraphindent}
+ \parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
+   \suppressfirstparagraphindent}
+ 
+ % These macros generate a chapter, section, etc. heading only
+ % (including whitespace, linebreaking, etc. around it),
+ % given all the information in convenient, parsed form.
+ 
+ % Args are the skip and penalty (usually negative)
+ \def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
+ 
+ % Parameter controlling skip before chapter headings (if needed)
+ \newskip\chapheadingskip
+ 
+ % Define plain chapter starts, and page on/off switching for it.
+ \def\chapbreak{\dobreak \chapheadingskip {-4000}}
+ \def\chappager{\par\vfill\supereject}
+ % Because \domark is called before \chapoddpage, the filler page will
+ % get the headings for the next chapter, which is wrong.  But we don't
+ % care -- we just disable all headings on the filler page.
+ \def\chapoddpage{%
+   \chappager
+   \ifodd\pageno \else
+     \begingroup
+       \headingsoff
+       \null
+       \chappager
+     \endgroup
+   \fi
+ }
+ 
+ \def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
+ 
+ \def\CHAPPAGoff{%
+ \global\let\contentsalignmacro = \chappager
+ \global\let\pchapsepmacro=\chapbreak
+ \global\let\pagealignmacro=\chappager}
+ 
+ \def\CHAPPAGon{%
+ \global\let\contentsalignmacro = \chappager
+ \global\let\pchapsepmacro=\chappager
+ \global\let\pagealignmacro=\chappager
+ \global\def\HEADINGSon{\HEADINGSsingle}}
+ 
+ \def\CHAPPAGodd{%
+ \global\let\contentsalignmacro = \chapoddpage
+ \global\let\pchapsepmacro=\chapoddpage
+ \global\let\pagealignmacro=\chapoddpage
+ \global\def\HEADINGSon{\HEADINGSdouble}}
+ 
+ \CHAPPAGon
+ 
+ % Chapter opening.
+ %
+ % #1 is the text, #2 is the section type (Ynumbered, Ynothing,
+ % Yappendix, Yomitfromtoc), #3 the chapter number.
+ %
+ % To test against our argument.
+ \def\Ynothingkeyword{Ynothing}
+ \def\Yomitfromtockeyword{Yomitfromtoc}
+ \def\Yappendixkeyword{Yappendix}
+ %
+ \def\chapmacro#1#2#3{%
+   % Insert the first mark before the heading break (see notes for \domark).
+   \let\prevchapterdefs=\lastchapterdefs
+   \let\prevsectiondefs=\lastsectiondefs
+   \gdef\lastsectiondefs{\gdef\thissectionname{}\gdef\thissectionnum{}%
+                         \gdef\thissection{}}%
+   %
+   \def\temptype{#2}%
+   \ifx\temptype\Ynothingkeyword
+     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+                           \gdef\thischapter{\thischaptername}}%
+   \else\ifx\temptype\Yomitfromtockeyword
+     \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+                           \gdef\thischapter{}}%
+   \else\ifx\temptype\Yappendixkeyword
+     \toks0={#1}%
+     \xdef\lastchapterdefs{%
+       \gdef\noexpand\thischaptername{\the\toks0}%
+       \gdef\noexpand\thischapternum{\appendixletter}%
+       % \noexpand\putwordAppendix avoids expanding indigestible
+       % commands in some of the translations.
+       \gdef\noexpand\thischapter{\noexpand\putwordAppendix{}
+                                  \noexpand\thischapternum:
+                                  \noexpand\thischaptername}%
+     }%
+   \else
+     \toks0={#1}%
+     \xdef\lastchapterdefs{%
+       \gdef\noexpand\thischaptername{\the\toks0}%
+       \gdef\noexpand\thischapternum{\the\chapno}%
+       % \noexpand\putwordChapter avoids expanding indigestible
+       % commands in some of the translations.
+       \gdef\noexpand\thischapter{\noexpand\putwordChapter{}
+                                  \noexpand\thischapternum:
+                                  \noexpand\thischaptername}%
+     }%
+   \fi\fi\fi
+   %
+   % Output the mark.  Pass it through \safewhatsit, to take care of
+   % the preceding space.
+   \safewhatsit\domark
+   %
+   % Insert the chapter heading break.
+   \pchapsepmacro
+   %
+   % Now the second mark, after the heading break.  No break points
+   % between here and the heading.
+   \let\prevchapterdefs=\lastchapterdefs
+   \let\prevsectiondefs=\lastsectiondefs
+   \domark
+   %
+   {%
+     \chapfonts \rmisbold
+     %
+     % Have to define \lastsection before calling \donoderef, because the
+     % xref code eventually uses it.  On the other hand, it has to be called
+     % after \pchapsepmacro, or the headline will change too soon.
+     \gdef\lastsection{#1}%
+     %
+     % Only insert the separating space if we have a chapter/appendix
+     % number, and don't print the unnumbered ``number''.
+     \ifx\temptype\Ynothingkeyword
+       \setbox0 = \hbox{}%
+       \def\toctype{unnchap}%
+     \else\ifx\temptype\Yomitfromtockeyword
+       \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
+       \def\toctype{omit}%
+     \else\ifx\temptype\Yappendixkeyword
+       \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
+       \def\toctype{app}%
+     \else
+       \setbox0 = \hbox{#3\enspace}%
+       \def\toctype{numchap}%
+     \fi\fi\fi
+     %
+     % Write the toc entry for this chapter.  Must come before the
+     % \donoderef, because we include the current node name in the toc
+     % entry, and \donoderef resets it to empty.
+     \writetocentry{\toctype}{#1}{#3}%
+     %
+     % For pdftex, we have to write out the node definition (aka, make
+     % the pdfdest) after any page break, but before the actual text has
+     % been typeset.  If the destination for the pdf outline is after the
+     % text, then jumping from the outline may wind up with the text not
+     % being visible, for instance under high magnification.
+     \donoderef{#2}%
+     %
+     % Typeset the actual heading.
+     \nobreak % Avoid page breaks at the interline glue.
+     \vbox{\raggedtitlesettings \hangindent=\wd0 \centerparametersmaybe
+           \unhbox0 #1\par}%
+   }%
+   \nobreak\bigskip % no page break after a chapter title
+   \nobreak
+ }
+ 
+ % @centerchap -- centered and unnumbered.
+ \let\centerparametersmaybe = \relax
+ \def\centerparameters{%
+   \advance\rightskip by 3\rightskip
+   \leftskip = \rightskip
+   \parfillskip = 0pt
+ }
+ 
+ 
+ % I don't think this chapter style is supported any more, so I'm not
+ % updating it with the new noderef stuff.  We'll see.  --karl, 11aug03.
+ %
+ \def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
+ %
+ \def\unnchfopen #1{%
+   \chapoddpage
+   \vbox{\chapfonts \raggedtitlesettings #1\par}%
+   \nobreak\bigskip\nobreak
+ }
+ \def\chfopen #1#2{\chapoddpage {\chapfonts
+ \vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
+ \par\penalty 5000 %
+ }
+ \def\centerchfopen #1{%
+   \chapoddpage
+   \vbox{\chapfonts \raggedtitlesettings \hfill #1\hfill}%
+   \nobreak\bigskip \nobreak
+ }
+ \def\CHAPFopen{%
+   \global\let\chapmacro=\chfopen
+   \global\let\centerchapmacro=\centerchfopen}
+ 
+ 
+ % Section titles.  These macros combine the section number parts and
+ % call the generic \sectionheading to do the printing.
+ %
+ \newskip\secheadingskip
+ \def\secheadingbreak{\dobreak \secheadingskip{-1000}}
+ 
+ % Subsection titles.
+ \newskip\subsecheadingskip
+ \def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
+ 
+ % Subsubsection titles.
+ \def\subsubsecheadingskip{\subsecheadingskip}
+ \def\subsubsecheadingbreak{\subsecheadingbreak}
+ 
+ 
+ % Print any size, any type, section title.
+ %
+ % #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
+ % the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
+ % section number.
+ %
+ \def\seckeyword{sec}
+ %
+ \def\sectionheading#1#2#3#4{%
+   {%
+     \checkenv{}% should not be in an environment.
+     %
+     % Switch to the right set of fonts.
+     \csname #2fonts\endcsname \rmisbold
+     %
+     \def\sectionlevel{#2}%
+     \def\temptype{#3}%
+     %
+     % Insert first mark before the heading break (see notes for \domark).
+     \let\prevsectiondefs=\lastsectiondefs
+     \ifx\temptype\Ynothingkeyword
+       \ifx\sectionlevel\seckeyword
+         \gdef\lastsectiondefs{\gdef\thissectionname{#1}\gdef\thissectionnum{}%
+                               \gdef\thissection{\thissectionname}}%
+       \fi
+     \else\ifx\temptype\Yomitfromtockeyword
+       % Don't redefine \thissection.
+     \else\ifx\temptype\Yappendixkeyword
+       \ifx\sectionlevel\seckeyword
+         \toks0={#1}%
+         \xdef\lastsectiondefs{%
+           \gdef\noexpand\thissectionname{\the\toks0}%
+           \gdef\noexpand\thissectionnum{#4}%
+           % \noexpand\putwordSection avoids expanding indigestible
+           % commands in some of the translations.
+           \gdef\noexpand\thissection{\noexpand\putwordSection{}
+                                      \noexpand\thissectionnum:
+                                      \noexpand\thissectionname}%
+         }%
+       \fi
+     \else
+       \ifx\sectionlevel\seckeyword
+         \toks0={#1}%
+         \xdef\lastsectiondefs{%
+           \gdef\noexpand\thissectionname{\the\toks0}%
+           \gdef\noexpand\thissectionnum{#4}%
+           % \noexpand\putwordSection avoids expanding indigestible
+           % commands in some of the translations.
+           \gdef\noexpand\thissection{\noexpand\putwordSection{}
+                                      \noexpand\thissectionnum:
+                                      \noexpand\thissectionname}%
+         }%
+       \fi
+     \fi\fi\fi
+     %
+     % Go into vertical mode.  Usually we'll already be there, but we
+     % don't want the following whatsit to end up in a preceding paragraph
+     % if the document didn't happen to have a blank line.
+     \par
+     %
+     % Output the mark.  Pass it through \safewhatsit, to take care of
+     % the preceding space.
+     \safewhatsit\domark
+     %
+     % Insert space above the heading.
+     \csname #2headingbreak\endcsname
+     %
+     % Now the second mark, after the heading break.  No break points
+     % between here and the heading.
+     \global\let\prevsectiondefs=\lastsectiondefs
+     \domark
+     %
+     % Only insert the space after the number if we have a section number.
+     \ifx\temptype\Ynothingkeyword
+       \setbox0 = \hbox{}%
+       \def\toctype{unn}%
+       \gdef\lastsection{#1}%
+     \else\ifx\temptype\Yomitfromtockeyword
+       % for @headings -- no section number, don't include in toc,
+       % and don't redefine \lastsection.
+       \setbox0 = \hbox{}%
+       \def\toctype{omit}%
+       \let\sectionlevel=\empty
+     \else\ifx\temptype\Yappendixkeyword
+       \setbox0 = \hbox{#4\enspace}%
+       \def\toctype{app}%
+       \gdef\lastsection{#1}%
+     \else
+       \setbox0 = \hbox{#4\enspace}%
+       \def\toctype{num}%
+       \gdef\lastsection{#1}%
+     \fi\fi\fi
+     %
+     % Write the toc entry (before \donoderef).  See comments in \chapmacro.
+     \writetocentry{\toctype\sectionlevel}{#1}{#4}%
+     %
+     % Write the node reference (= pdf destination for pdftex).
+     % Again, see comments in \chapmacro.
+     \donoderef{#3}%
+     %
+     % Interline glue will be inserted when the vbox is completed.
+     % That glue will be a valid breakpoint for the page, since it'll be
+     % preceded by a whatsit (usually from the \donoderef, or from the
+     % \writetocentry if there was no node).  We don't want to allow that
+     % break, since then the whatsits could end up on page n while the
+     % section is on page n+1, thus toc/etc. are wrong.  Debian bug 276000.
+     \nobreak
+     %
+     % Output the actual section heading.
+     \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \ptexraggedright
+           \hangindent=\wd0  % zero if no section number
+           \unhbox0 #1}%
+   }%
+   % Add extra space after the heading -- half of whatever came above it.
+   % Don't allow stretch, though.
+   \kern .5 \csname #2headingskip\endcsname
+   %
+   % Do not let the kern be a potential breakpoint, as it would be if it
+   % was followed by glue.
+   \nobreak
+   %
+   % We'll almost certainly start a paragraph next, so don't let that
+   % glue accumulate.  (Not a breakpoint because it's preceded by a
+   % discardable item.)  However, when a paragraph is not started next
+   % (\startdefun, \cartouche, \center, etc.), this needs to be wiped out
+   % or the negative glue will cause weirdly wrong output, typically
+   % obscuring the section heading with something else.
+   \vskip-\parskip
+   %
+   % This is so the last item on the main vertical list is a known
+   % \penalty > 10000, so \startdefun, etc., can recognize the situation
+   % and do the needful.
+   \penalty 10001
+ }
+ 
+ 
+ \message{toc,}
+ % Table of contents.
+ \newwrite\tocfile
+ 
+ % Write an entry to the toc file, opening it if necessary.
+ % Called from @chapter, etc.
+ %
+ % Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
+ % We append the current node name (if any) and page number as additional
+ % arguments for the \{chap,sec,...}entry macros which will eventually
+ % read this.  The node name is used in the pdf outlines as the
+ % destination to jump to.
+ %
+ % We open the .toc file for writing here instead of at @setfilename (or
+ % any other fixed time) so that @contents can be anywhere in the document.
+ % But if #1 is `omit', then we don't do anything.  This is used for the
+ % table of contents chapter openings themselves.
+ %
+ \newif\iftocfileopened
+ \def\omitkeyword{omit}%
+ %
+ \def\writetocentry#1#2#3{%
+   \edef\writetoctype{#1}%
+   \ifx\writetoctype\omitkeyword \else
+     \iftocfileopened\else
+       \immediate\openout\tocfile = \jobname.toc
+       \global\tocfileopenedtrue
+     \fi
+     %
+     \iflinks
+       {\atdummies
+        \edef\temp{%
+          \write\tocfile{@#1entry{#2}{#3}{\lastnode}{\noexpand\folio}}}%
+        \temp
+       }%
+     \fi
+   \fi
+   %
+   % Tell \shipout to create a pdf destination on each page, if we're
+   % writing pdf.  These are used in the table of contents.  We can't
+   % just write one on every page because the title pages are numbered
+   % 1 and 2 (the page numbers aren't printed), and so are the first
+   % two pages of the document.  Thus, we'd have two destinations named
+   % `1', and two named `2'.
+   \ifpdf \global\pdfmakepagedesttrue \fi
+ }
+ 
+ 
+ % These characters do not print properly in the Computer Modern roman
+ % fonts, so we must take special care.  This is more or less redundant
+ % with the Texinfo input format setup at the end of this file.
+ %
+ \def\activecatcodes{%
+   \catcode`\"=\active
+   \catcode`\$=\active
+   \catcode`\<=\active
+   \catcode`\>=\active
+   \catcode`\\=\active
+   \catcode`\^=\active
+   \catcode`\_=\active
+   \catcode`\|=\active
+   \catcode`\~=\active
+ }
+ 
+ 
+ % Read the toc file, which is essentially Texinfo input.
+ \def\readtocfile{%
+   \setupdatafile
+   \activecatcodes
+   \input \tocreadfilename
+ }
+ 
+ \newskip\contentsrightmargin \contentsrightmargin=1in
+ \newcount\savepageno
+ \newcount\lastnegativepageno \lastnegativepageno = -1
+ 
+ % Prepare to read what we've written to \tocfile.
+ %
+ \def\startcontents#1{%
+   % If @setchapternewpage on, and @headings double, the contents should
+   % start on an odd page, unlike chapters.  Thus, we maintain
+   % \contentsalignmacro in parallel with \pagealignmacro.
+   % From: Torbjorn Granlund <tege@matematik.su.se>
+   \contentsalignmacro
+   \immediate\closeout\tocfile
+   %
+   % Don't need to put `Contents' or `Short Contents' in the headline.
+   % It is abundantly clear what they are.
+   \chapmacro{#1}{Yomitfromtoc}{}%
+   %
+   \savepageno = \pageno
+   \begingroup                  % Set up to handle contents files properly.
+     \raggedbottom              % Worry more about breakpoints than the bottom.
+     \advance\hsize by -\contentsrightmargin % Don't use the full line length.
+     %
+     % Roman numerals for page numbers.
+     \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
+ }
+ 
+ % redefined for the two-volume lispref.  We always output on
+ % \jobname.toc even if this is redefined.
+ %
+ \def\tocreadfilename{\jobname.toc}
+ 
+ % Normal (long) toc.
+ %
+ \def\contents{%
+   \startcontents{\putwordTOC}%
+     \openin 1 \tocreadfilename\space
+     \ifeof 1 \else
+       \readtocfile
+     \fi
+     \vfill \eject
+     \contentsalignmacro % in case @setchapternewpage odd is in effect
+     \ifeof 1 \else
+       \pdfmakeoutlines
+     \fi
+     \closein 1
+   \endgroup
+   \lastnegativepageno = \pageno
+   \global\pageno = \savepageno
+ }
+ 
+ % And just the chapters.
+ \def\summarycontents{%
+   \startcontents{\putwordShortTOC}%
+     %
+     \let\partentry = \shortpartentry
+     \let\numchapentry = \shortchapentry
+     \let\appentry = \shortchapentry
+     \let\unnchapentry = \shortunnchapentry
+     % We want a true roman here for the page numbers.
+     \secfonts
+     \let\rm=\shortcontrm \let\bf=\shortcontbf
+     \let\sl=\shortcontsl \let\tt=\shortconttt
+     \rm
+     \hyphenpenalty = 10000
+     \advance\baselineskip by 1pt % Open it up a little.
+     \def\numsecentry##1##2##3##4{}
+     \let\appsecentry = \numsecentry
+     \let\unnsecentry = \numsecentry
+     \let\numsubsecentry = \numsecentry
+     \let\appsubsecentry = \numsecentry
+     \let\unnsubsecentry = \numsecentry
+     \let\numsubsubsecentry = \numsecentry
+     \let\appsubsubsecentry = \numsecentry
+     \let\unnsubsubsecentry = \numsecentry
+     \openin 1 \tocreadfilename\space
+     \ifeof 1 \else
+       \readtocfile
+     \fi
+     \closein 1
+     \vfill \eject
+     \contentsalignmacro % in case @setchapternewpage odd is in effect
+   \endgroup
+   \lastnegativepageno = \pageno
+   \global\pageno = \savepageno
+ }
+ \let\shortcontents = \summarycontents
+ 
+ % Typeset the label for a chapter or appendix for the short contents.
+ % The arg is, e.g., `A' for an appendix, or `3' for a chapter.
+ %
+ \def\shortchaplabel#1{%
+   % This space should be enough, since a single number is .5em, and the
+   % widest letter (M) is 1em, at least in the Computer Modern fonts.
+   % But use \hss just in case.
+   % (This space doesn't include the extra space that gets added after
+   % the label; that gets put in by \shortchapentry above.)
+   %
+   % We'd like to right-justify chapter numbers, but that looks strange
+   % with appendix letters.  And right-justifying numbers and
+   % left-justifying letters looks strange when there is less than 10
+   % chapters.  Have to read the whole toc once to know how many chapters
+   % there are before deciding ...
+   \hbox to 1em{#1\hss}%
+ }
+ 
+ % These macros generate individual entries in the table of contents.
+ % The first argument is the chapter or section name.
+ % The last argument is the page number.
+ % The arguments in between are the chapter number, section number, ...
+ 
+ % Parts, in the main contents.  Replace the part number, which doesn't
+ % exist, with an empty box.  Let's hope all the numbers have the same width.
+ % Also ignore the page number, which is conventionally not printed.
+ \def\numeralbox{\setbox0=\hbox{8}\hbox to \wd0{\hfil}}
+ \def\partentry#1#2#3#4{\dochapentry{\numeralbox\labelspace#1}{}}
+ %
+ % Parts, in the short toc.
+ \def\shortpartentry#1#2#3#4{%
+   \penalty-300
+   \vskip.5\baselineskip plus.15\baselineskip minus.1\baselineskip
+   \shortchapentry{{\bf #1}}{\numeralbox}{}{}%
+ }
+ 
+ % Chapters, in the main contents.
+ \def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
+ %
+ % Chapters, in the short toc.
+ % See comments in \dochapentry re vbox and related settings.
+ \def\shortchapentry#1#2#3#4{%
+   \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
+ }
+ 
+ % Appendices, in the main contents.
+ % Need the word Appendix, and a fixed-size box.
+ %
+ \def\appendixbox#1{%
+   % We use M since it's probably the widest letter.
+   \setbox0 = \hbox{\putwordAppendix{} M}%
+   \hbox to \wd0{\putwordAppendix{} #1\hss}}
+ %
+ \def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
+ 
+ % Unnumbered chapters.
+ \def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
+ \def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
+ 
+ % Sections.
+ \def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
+ \let\appsecentry=\numsecentry
+ \def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
+ 
+ % Subsections.
+ \def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
+ \let\appsubsecentry=\numsubsecentry
+ \def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
+ 
+ % And subsubsections.
+ \def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
+ \let\appsubsubsecentry=\numsubsubsecentry
+ \def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
+ 
+ % This parameter controls the indentation of the various levels.
+ % Same as \defaultparindent.
+ \newdimen\tocindent \tocindent = 15pt
+ 
+ % Now for the actual typesetting. In all these, #1 is the text and #2 is the
+ % page number.
+ %
+ % If the toc has to be broken over pages, we want it to be at chapters
+ % if at all possible; hence the \penalty.
+ \def\dochapentry#1#2{%
+    \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
+    \begingroup
+      \chapentryfonts
+      \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+    \endgroup
+    \nobreak\vskip .25\baselineskip plus.1\baselineskip
+ }
+ 
+ \def\dosecentry#1#2{\begingroup
+   \secentryfonts \leftskip=\tocindent
+   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+ \endgroup}
+ 
+ \def\dosubsecentry#1#2{\begingroup
+   \subsecentryfonts \leftskip=2\tocindent
+   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+ \endgroup}
+ 
+ \def\dosubsubsecentry#1#2{\begingroup
+   \subsubsecentryfonts \leftskip=3\tocindent
+   \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+ \endgroup}
+ 
+ % We use the same \entry macro as for the index entries.
+ \let\tocentry = \entry
+ 
+ % Space between chapter (or whatever) number and the title.
+ \def\labelspace{\hskip1em \relax}
+ 
+ \def\dopageno#1{{\rm #1}}
+ \def\doshortpageno#1{{\rm #1}}
+ 
+ \def\chapentryfonts{\secfonts \rm}
+ \def\secentryfonts{\textfonts}
+ \def\subsecentryfonts{\textfonts}
+ \def\subsubsecentryfonts{\textfonts}
+ 
+ 
+ \message{environments,}
+ % @foo ... @end foo.
+ 
+ % @tex ... @end tex    escapes into raw TeX temporarily.
+ % One exception: @ is still an escape character, so that @end tex works.
+ % But \@ or @@ will get a plain @ character.
+ 
+ \envdef\tex{%
+   \setupmarkupstyle{tex}%
+   \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
+   \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
+   \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
+   \catcode `\%=14
+   \catcode `\+=\other
+   \catcode `\"=\other
+   \catcode `\|=\other
+   \catcode `\<=\other
+   \catcode `\>=\other
+   \catcode `\`=\other
+   \catcode `\'=\other
+   \escapechar=`\\
+   %
+   % ' is active in math mode (mathcode"8000).  So reset it, and all our
+   % other math active characters (just in case), to plain's definitions.
+   \mathactive
+   %
+   \let\b=\ptexb
+   \let\bullet=\ptexbullet
+   \let\c=\ptexc
+   \let\,=\ptexcomma
+   \let\.=\ptexdot
+   \let\dots=\ptexdots
+   \let\equiv=\ptexequiv
+   \let\!=\ptexexclam
+   \let\i=\ptexi
+   \let\indent=\ptexindent
+   \let\noindent=\ptexnoindent
+   \let\{=\ptexlbrace
+   \let\+=\tabalign
+   \let\}=\ptexrbrace
+   \let\/=\ptexslash
+   \let\*=\ptexstar
+   \let\t=\ptext
+   \expandafter \let\csname top\endcsname=\ptextop  % we've made it outer
+   \let\frenchspacing=\plainfrenchspacing
+   %
+   \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
+   \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
+   \def\@{@}%
+ }
+ % There is no need to define \Etex.
+ 
+ % Define @lisp ... @end lisp.
+ % @lisp environment forms a group so it can rebind things,
+ % including the definition of @end lisp (which normally is erroneous).
+ 
+ % Amount to narrow the margins by for @lisp.
+ \newskip\lispnarrowing \lispnarrowing=0.4in
+ 
+ % This is the definition that ^^M gets inside @lisp, @example, and other
+ % such environments.  \null is better than a space, since it doesn't
+ % have any width.
+ \def\lisppar{\null\endgraf}
+ 
+ % This space is always present above and below environments.
+ \newskip\envskipamount \envskipamount = 0pt
+ 
+ % Make spacing and below environment symmetrical.  We use \parskip here
+ % to help in doing that, since in @example-like environments \parskip
+ % is reset to zero; thus the \afterenvbreak inserts no space -- but the
+ % start of the next paragraph will insert \parskip.
+ %
+ \def\aboveenvbreak{{%
+   % =10000 instead of <10000 because of a special case in \itemzzz and
+   % \sectionheading, q.v.
+   \ifnum \lastpenalty=10000 \else
+     \advance\envskipamount by \parskip
+     \endgraf
+     \ifdim\lastskip<\envskipamount
+       \removelastskip
+       % it's not a good place to break if the last penalty was \nobreak
+       % or better ...
+       \ifnum\lastpenalty<10000 \penalty-50 \fi
+       \vskip\envskipamount
+     \fi
+   \fi
+ }}
+ 
+ \let\afterenvbreak = \aboveenvbreak
+ 
+ % \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins; it will
+ % also clear it, so that its embedded environments do the narrowing again.
+ \let\nonarrowing=\relax
+ 
+ % @cartouche ... @end cartouche: draw rectangle w/rounded corners around
+ % environment contents.
+ \font\circle=lcircle10
+ \newdimen\circthick
+ \newdimen\cartouter\newdimen\cartinner
+ \newskip\normbskip\newskip\normpskip\newskip\normlskip
+ \circthick=\fontdimen8\circle
+ %
+ \def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
+ \def\ctr{{\hskip 6pt\circle\char'010}}
+ \def\cbl{{\circle\char'012\hskip -6pt}}
+ \def\cbr{{\hskip 6pt\circle\char'011}}
+ \def\carttop{\hbox to \cartouter{\hskip\lskip
+         \ctl\leaders\hrule height\circthick\hfil\ctr
+         \hskip\rskip}}
+ \def\cartbot{\hbox to \cartouter{\hskip\lskip
+         \cbl\leaders\hrule height\circthick\hfil\cbr
+         \hskip\rskip}}
+ %
+ \newskip\lskip\newskip\rskip
+ 
+ \envdef\cartouche{%
+   \ifhmode\par\fi  % can't be in the midst of a paragraph.
+   \startsavinginserts
+   \lskip=\leftskip \rskip=\rightskip
+   \leftskip=0pt\rightskip=0pt % we want these *outside*.
+   \cartinner=\hsize \advance\cartinner by-\lskip
+   \advance\cartinner by-\rskip
+   \cartouter=\hsize
+   \advance\cartouter by 18.4pt	% allow for 3pt kerns on either
+ 				% side, and for 6pt waste from
+ 				% each corner char, and rule thickness
+   \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
+   % Flag to tell @lisp, etc., not to narrow margin.
+   \let\nonarrowing = t%
+   %
+   % If this cartouche directly follows a sectioning command, we need the
+   % \parskip glue (backspaced over by default) or the cartouche can
+   % collide with the section heading.
+   \ifnum\lastpenalty>10000 \vskip\parskip \penalty\lastpenalty \fi
+   %
+   \vbox\bgroup
+       \baselineskip=0pt\parskip=0pt\lineskip=0pt
+       \carttop
+       \hbox\bgroup
+ 	  \hskip\lskip
+ 	  \vrule\kern3pt
+ 	  \vbox\bgroup
+ 	      \kern3pt
+ 	      \hsize=\cartinner
+ 	      \baselineskip=\normbskip
+ 	      \lineskip=\normlskip
+ 	      \parskip=\normpskip
+ 	      \vskip -\parskip
+ 	      \comment % For explanation, see the end of def\group.
+ }
+ \def\Ecartouche{%
+               \ifhmode\par\fi
+ 	      \kern3pt
+ 	  \egroup
+ 	  \kern3pt\vrule
+ 	  \hskip\rskip
+       \egroup
+       \cartbot
+   \egroup
+   \checkinserts
+ }
+ 
+ 
+ % This macro is called at the beginning of all the @example variants,
+ % inside a group.
+ \newdimen\nonfillparindent
+ \def\nonfillstart{%
+   \aboveenvbreak
+   \ifdim\hfuzz < 12pt \hfuzz = 12pt \fi % Don't be fussy
+   \sepspaces % Make spaces be word-separators rather than space tokens.
+   \let\par = \lisppar % don't ignore blank lines
+   \obeylines % each line of input is a line of output
+   \parskip = 0pt
+   % Turn off paragraph indentation but redefine \indent to emulate
+   % the normal \indent.
+   \nonfillparindent=\parindent
+   \parindent = 0pt
+   \let\indent\nonfillindent
+   %
+   \emergencystretch = 0pt % don't try to avoid overfull boxes
+   \ifx\nonarrowing\relax
+     \advance \leftskip by \lispnarrowing
+     \exdentamount=\lispnarrowing
+   \else
+     \let\nonarrowing = \relax
+   \fi
+   \let\exdent=\nofillexdent
+ }
+ 
+ \begingroup
+ \obeyspaces
+ % We want to swallow spaces (but not other tokens) after the fake
+ % @indent in our nonfill-environments, where spaces are normally
+ % active and set to @tie, resulting in them not being ignored after
+ % @indent.
+ \gdef\nonfillindent{\futurelet\temp\nonfillindentcheck}%
+ \gdef\nonfillindentcheck{%
+ \ifx\temp %
+ \expandafter\nonfillindentgobble%
+ \else%
+ \leavevmode\nonfillindentbox%
+ \fi%
+ }%
+ \endgroup
+ \def\nonfillindentgobble#1{\nonfillindent}
+ \def\nonfillindentbox{\hbox to \nonfillparindent{\hss}}
+ 
+ % If you want all examples etc. small: @set dispenvsize small.
+ % If you want even small examples the full size: @set dispenvsize nosmall.
+ % This affects the following displayed environments:
+ %    @example, @display, @format, @lisp
+ %
+ \def\smallword{small}
+ \def\nosmallword{nosmall}
+ \let\SETdispenvsize\relax
+ \def\setnormaldispenv{%
+   \ifx\SETdispenvsize\smallword
+     % end paragraph for sake of leading, in case document has no blank
+     % line.  This is redundant with what happens in \aboveenvbreak, but
+     % we need to do it before changing the fonts, and it's inconvenient
+     % to change the fonts afterward.
+     \ifnum \lastpenalty=10000 \else \endgraf \fi
+     \smallexamplefonts \rm
+   \fi
+ }
+ \def\setsmalldispenv{%
+   \ifx\SETdispenvsize\nosmallword
+   \else
+     \ifnum \lastpenalty=10000 \else \endgraf \fi
+     \smallexamplefonts \rm
+   \fi
+ }
+ 
+ % We often define two environments, @foo and @smallfoo.
+ % Let's do it in one command.  #1 is the env name, #2 the definition.
+ \def\makedispenvdef#1#2{%
+   \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}%
+   \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}%
+   \expandafter\let\csname E#1\endcsname \afterenvbreak
+   \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
+ }
+ 
+ % Define two environment synonyms (#1 and #2) for an environment.
+ \def\maketwodispenvdef#1#2#3{%
+   \makedispenvdef{#1}{#3}%
+   \makedispenvdef{#2}{#3}%
+ }
+ %
+ % @lisp: indented, narrowed, typewriter font;
+ % @example: same as @lisp.
+ %
+ % @smallexample and @smalllisp: use smaller fonts.
+ % Originally contributed by Pavel@xerox.
+ %
+ \maketwodispenvdef{lisp}{example}{%
+   \nonfillstart
+   \tt\setupmarkupstyle{example}%
+   \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
+   \gobble % eat return
+ }
+ % @display/@smalldisplay: same as @lisp except keep current font.
+ %
+ \makedispenvdef{display}{%
+   \nonfillstart
+   \gobble
+ }
+ 
+ % @format/@smallformat: same as @display except don't narrow margins.
+ %
+ \makedispenvdef{format}{%
+   \let\nonarrowing = t%
+   \nonfillstart
+   \gobble
+ }
+ 
+ % @flushleft: same as @format, but doesn't obey \SETdispenvsize.
+ \envdef\flushleft{%
+   \let\nonarrowing = t%
+   \nonfillstart
+   \gobble
+ }
+ \let\Eflushleft = \afterenvbreak
+ 
+ % @flushright.
+ %
+ \envdef\flushright{%
+   \let\nonarrowing = t%
+   \nonfillstart
+   \advance\leftskip by 0pt plus 1fill\relax
+   \gobble
+ }
+ \let\Eflushright = \afterenvbreak
+ 
+ 
+ % @raggedright does more-or-less normal line breaking but no right
+ % justification.  From plain.tex.
+ \envdef\raggedright{%
+   \rightskip0pt plus2em \spaceskip.3333em \xspaceskip.5em\relax
+ }
+ \let\Eraggedright\par
+ 
+ \envdef\raggedleft{%
+   \parindent=0pt \leftskip0pt plus2em
+   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
+   \hbadness=10000 % Last line will usually be underfull, so turn off
+                   % badness reporting.
+ }
+ \let\Eraggedleft\par
+ 
+ \envdef\raggedcenter{%
+   \parindent=0pt \rightskip0pt plus1em \leftskip0pt plus1em
+   \spaceskip.3333em \xspaceskip.5em \parfillskip=0pt
+   \hbadness=10000 % Last line will usually be underfull, so turn off
+                   % badness reporting.
+ }
+ \let\Eraggedcenter\par
+ 
+ 
+ % @quotation does normal linebreaking (hence we can't use \nonfillstart)
+ % and narrows the margins.  We keep \parskip nonzero in general, since
+ % we're doing normal filling.  So, when using \aboveenvbreak and
+ % \afterenvbreak, temporarily make \parskip 0.
+ %
+ \makedispenvdef{quotation}{\quotationstart}
+ %
+ \def\quotationstart{%
+   \indentedblockstart % same as \indentedblock, but increase right margin too.
+   \ifx\nonarrowing\relax
+     \advance\rightskip by \lispnarrowing
+   \fi
+   \parsearg\quotationlabel
+ }
+ 
+ % We have retained a nonzero parskip for the environment, since we're
+ % doing normal filling.
+ %
+ \def\Equotation{%
+   \par
+   \ifx\quotationauthor\thisisundefined\else
+     % indent a bit.
+     \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
+   \fi
+   {\parskip=0pt \afterenvbreak}%
+ }
+ \def\Esmallquotation{\Equotation}
+ 
+ % If we're given an argument, typeset it in bold with a colon after.
+ \def\quotationlabel#1{%
+   \def\temp{#1}%
+   \ifx\temp\empty \else
+     {\bf #1: }%
+   \fi
+ }
+ 
+ % @indentedblock is like @quotation, but indents only on the left and
+ % has no optional argument.
+ % 
+ \makedispenvdef{indentedblock}{\indentedblockstart}
+ %
+ \def\indentedblockstart{%
+   {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
+   \parindent=0pt
+   %
+   % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
+   \ifx\nonarrowing\relax
+     \advance\leftskip by \lispnarrowing
+     \exdentamount = \lispnarrowing
+   \else
+     \let\nonarrowing = \relax
+   \fi
+ }
+ 
+ % Keep a nonzero parskip for the environment, since we're doing normal filling.
+ %
+ \def\Eindentedblock{%
+   \par
+   {\parskip=0pt \afterenvbreak}%
+ }
+ \def\Esmallindentedblock{\Eindentedblock}
+ 
+ 
+ % LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
+ % If we want to allow any <char> as delimiter,
+ % we need the curly braces so that makeinfo sees the @verb command, eg:
+ % `@verbx...x' would look like the '@verbx' command.  --janneke@gnu.org
+ %
+ % [Knuth]: Donald Ervin Knuth, 1996.  The TeXbook.
+ %
+ % [Knuth] p.344; only we need to do the other characters Texinfo sets
+ % active too.  Otherwise, they get lost as the first character on a
+ % verbatim line.
+ \def\dospecials{%
+   \do\ \do\\\do\{\do\}\do\$\do\&%
+   \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
+   \do\<\do\>\do\|\do\@\do+\do\"%
+   % Don't do the quotes -- if we do, @set txicodequoteundirected and
+   % @set txicodequotebacktick will not have effect on @verb and
+   % @verbatim, and ?` and !` ligatures won't get disabled.
+   %\do\`\do\'%
+ }
+ %
+ % [Knuth] p. 380
+ \def\uncatcodespecials{%
+   \def\do##1{\catcode`##1=\other}\dospecials}
+ %
+ % Setup for the @verb command.
+ %
+ % Eight spaces for a tab
+ \begingroup
+   \catcode`\^^I=\active
+   \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
+ \endgroup
+ %
+ \def\setupverb{%
+   \tt  % easiest (and conventionally used) font for verbatim
+   \def\par{\leavevmode\endgraf}%
+   \setupmarkupstyle{verb}%
+   \tabeightspaces
+   % Respect line breaks,
+   % print special symbols as themselves, and
+   % make each space count
+   % must do in this order:
+   \obeylines \uncatcodespecials \sepspaces
+ }
+ 
+ % Setup for the @verbatim environment
+ %
+ % Real tab expansion.
+ \newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
+ %
+ % We typeset each line of the verbatim in an \hbox, so we can handle
+ % tabs.  The \global is in case the verbatim line starts with an accent,
+ % or some other command that starts with a begin-group.  Otherwise, the
+ % entire \verbbox would disappear at the corresponding end-group, before
+ % it is typeset.  Meanwhile, we can't have nested verbatim commands
+ % (can we?), so the \global won't be overwriting itself.
+ \newbox\verbbox
+ \def\starttabbox{\global\setbox\verbbox=\hbox\bgroup}
+ %
+ \begingroup
+   \catcode`\^^I=\active
+   \gdef\tabexpand{%
+     \catcode`\^^I=\active
+     \def^^I{\leavevmode\egroup
+       \dimen\verbbox=\wd\verbbox % the width so far, or since the previous tab
+       \divide\dimen\verbbox by\tabw
+       \multiply\dimen\verbbox by\tabw % compute previous multiple of \tabw
+       \advance\dimen\verbbox by\tabw  % advance to next multiple of \tabw
+       \wd\verbbox=\dimen\verbbox \box\verbbox \starttabbox
+     }%
+   }
+ \endgroup
+ 
+ % start the verbatim environment.
+ \def\setupverbatim{%
+   \let\nonarrowing = t%
+   \nonfillstart
+   \tt % easiest (and conventionally used) font for verbatim
+   % The \leavevmode here is for blank lines.  Otherwise, we would
+   % never \starttabox and the \egroup would end verbatim mode.
+   \def\par{\leavevmode\egroup\box\verbbox\endgraf}%
+   \tabexpand
+   \setupmarkupstyle{verbatim}%
+   % Respect line breaks,
+   % print special symbols as themselves, and
+   % make each space count.
+   % Must do in this order:
+   \obeylines \uncatcodespecials \sepspaces
+   \everypar{\starttabbox}%
+ }
+ 
+ % Do the @verb magic: verbatim text is quoted by unique
+ % delimiter characters.  Before first delimiter expect a
+ % right brace, after last delimiter expect closing brace:
+ %
+ %    \def\doverb'{'<char>#1<char>'}'{#1}
+ %
+ % [Knuth] p. 382; only eat outer {}
+ \begingroup
+   \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
+   \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
+ \endgroup
+ %
+ \def\verb{\begingroup\setupverb\doverb}
+ %
+ %
+ % Do the @verbatim magic: define the macro \doverbatim so that
+ % the (first) argument ends when '@end verbatim' is reached, ie:
+ %
+ %     \def\doverbatim#1@end verbatim{#1}
+ %
+ % For Texinfo it's a lot easier than for LaTeX,
+ % because texinfo's \verbatim doesn't stop at '\end{verbatim}':
+ % we need not redefine '\', '{' and '}'.
+ %
+ % Inspired by LaTeX's verbatim command set [latex.ltx]
+ %
+ \begingroup
+   \catcode`\ =\active
+   \obeylines %
+   % ignore everything up to the first ^^M, that's the newline at the end
+   % of the @verbatim input line itself.  Otherwise we get an extra blank
+   % line in the output.
+   \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
+   % We really want {...\end verbatim} in the body of the macro, but
+   % without the active space; thus we have to use \xdef and \gobble.
+ \endgroup
+ %
+ \envdef\verbatim{%
+     \setupverbatim\doverbatim
+ }
+ \let\Everbatim = \afterenvbreak
+ 
+ 
+ % @verbatiminclude FILE - insert text of file in verbatim environment.
+ %
+ \def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
+ %
+ \def\doverbatiminclude#1{%
+   {%
+     \makevalueexpandable
+     \setupverbatim
+     \indexnofonts       % Allow `@@' and other weird things in file names.
+     \wlog{texinfo.tex: doing @verbatiminclude of #1^^J}%
+     \input #1
+     \afterenvbreak
+   }%
+ }
+ 
+ % @copying ... @end copying.
+ % Save the text away for @insertcopying later.
+ %
+ % We save the uninterpreted tokens, rather than creating a box.
+ % Saving the text in a box would be much easier, but then all the
+ % typesetting commands (@smallbook, font changes, etc.) have to be done
+ % beforehand -- and a) we want @copying to be done first in the source
+ % file; b) letting users define the frontmatter in as flexible order as
+ % possible is very desirable.
+ %
+ \def\copying{\checkenv{}\begingroup\scanargctxt\docopying}
+ \def\docopying#1@end copying{\endgroup\def\copyingtext{#1}}
+ %
+ \def\insertcopying{%
+   \begingroup
+     \parindent = 0pt  % paragraph indentation looks wrong on title page
+     \scanexp\copyingtext
+   \endgroup
+ }
+ 
+ 
+ \message{defuns,}
+ % @defun etc.
+ 
+ \newskip\defbodyindent \defbodyindent=.4in
+ \newskip\defargsindent \defargsindent=50pt
+ \newskip\deflastargmargin \deflastargmargin=18pt
+ \newcount\defunpenalty
+ 
+ % Start the processing of @deffn:
+ \def\startdefun{%
+   \ifnum\lastpenalty<10000
+     \medbreak
+     \defunpenalty=10003 % Will keep this @deffn together with the
+                         % following @def command, see below.
+   \else
+     % If there are two @def commands in a row, we'll have a \nobreak,
+     % which is there to keep the function description together with its
+     % header.  But if there's nothing but headers, we need to allow a
+     % break somewhere.  Check specifically for penalty 10002, inserted
+     % by \printdefunline, instead of 10000, since the sectioning
+     % commands also insert a nobreak penalty, and we don't want to allow
+     % a break between a section heading and a defun.
+     %
+     % As a further refinement, we avoid "club" headers by signalling
+     % with penalty of 10003 after the very first @deffn in the
+     % sequence (see above), and penalty of 10002 after any following
+     % @def command.
+     \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
+     %
+     % Similarly, after a section heading, do not allow a break.
+     % But do insert the glue.
+     \medskip  % preceded by discardable penalty, so not a breakpoint
+   \fi
+   %
+   \parindent=0in
+   \advance\leftskip by \defbodyindent
+   \exdentamount=\defbodyindent
+ }
+ 
+ \def\dodefunx#1{%
+   % First, check whether we are in the right environment:
+   \checkenv#1%
+   %
+   % As above, allow line break if we have multiple x headers in a row.
+   % It's not a great place, though.
+   \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
+   %
+   % And now, it's time to reuse the body of the original defun:
+   \expandafter\gobbledefun#1%
+ }
+ \def\gobbledefun#1\startdefun{}
+ 
+ % \printdefunline \deffnheader{text}
+ %
+ \def\printdefunline#1#2{%
+   \begingroup
+     % call \deffnheader:
+     #1#2 \endheader
+     % common ending:
+     \interlinepenalty = 10000
+     \advance\rightskip by 0pt plus 1fil\relax
+     \endgraf
+     \nobreak\vskip -\parskip
+     \penalty\defunpenalty  % signal to \startdefun and \dodefunx
+     % Some of the @defun-type tags do not enable magic parentheses,
+     % rendering the following check redundant.  But we don't optimize.
+     \checkparencounts
+   \endgroup
+ }
+ 
+ \def\Edefun{\endgraf\medbreak}
+ 
+ % \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
+ % the only thing remaining is to define \deffnheader.
+ %
+ \def\makedefun#1{%
+   \expandafter\let\csname E#1\endcsname = \Edefun
+   \edef\temp{\noexpand\domakedefun
+     \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
+   \temp
+ }
+ 
+ % \domakedefun \deffn \deffnx \deffnheader
+ %
+ % Define \deffn and \deffnx, without parameters.
+ % \deffnheader has to be defined explicitly.
+ %
+ \def\domakedefun#1#2#3{%
+   \envdef#1{%
+     \startdefun
+     \doingtypefnfalse    % distinguish typed functions from all else
+     \parseargusing\activeparens{\printdefunline#3}%
+   }%
+   \def#2{\dodefunx#1}%
+   \def#3%
+ }
+ 
+ \newif\ifdoingtypefn       % doing typed function?
+ \newif\ifrettypeownline    % typeset return type on its own line?
+ 
+ % @deftypefnnewline on|off says whether the return type of typed functions
+ % are printed on their own line.  This affects @deftypefn, @deftypefun,
+ % @deftypeop, and @deftypemethod.
+ % 
+ \parseargdef\deftypefnnewline{%
+   \def\temp{#1}%
+   \ifx\temp\onword
+     \expandafter\let\csname SETtxideftypefnnl\endcsname
+       = \empty
+   \else\ifx\temp\offword
+     \expandafter\let\csname SETtxideftypefnnl\endcsname
+       = \relax
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @txideftypefnnl value `\temp',
+                 must be on|off}%
+   \fi\fi
+ }
+ 
+ % Untyped functions:
+ 
+ % @deffn category name args
+ \makedefun{deffn}{\deffngeneral{}}
+ 
+ % @deffn category class name args
+ \makedefun{defop}#1 {\defopon{#1\ \putwordon}}
+ 
+ % \defopon {category on}class name args
+ \def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+ 
+ % \deffngeneral {subind}category name args
+ %
+ \def\deffngeneral#1#2 #3 #4\endheader{%
+   % Remember that \dosubind{fn}{foo}{} is equivalent to \doind{fn}{foo}.
+   \dosubind{fn}{\code{#3}}{#1}%
+   \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
+ }
+ 
+ % Typed functions:
+ 
+ % @deftypefn category type name args
+ \makedefun{deftypefn}{\deftypefngeneral{}}
+ 
+ % @deftypeop category class type name args
+ \makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
+ 
+ % \deftypeopon {category on}class type name args
+ \def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+ 
+ % \deftypefngeneral {subind}category type name args
+ %
+ \def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
+   \dosubind{fn}{\code{#4}}{#1}%
+   \doingtypefntrue
+   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+ }
+ 
+ % Typed variables:
+ 
+ % @deftypevr category type var args
+ \makedefun{deftypevr}{\deftypecvgeneral{}}
+ 
+ % @deftypecv category class type var args
+ \makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
+ 
+ % \deftypecvof {category of}class type var args
+ \def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
+ 
+ % \deftypecvgeneral {subind}category type var args
+ %
+ \def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
+   \dosubind{vr}{\code{#4}}{#1}%
+   \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+ }
+ 
+ % Untyped variables:
+ 
+ % @defvr category var args
+ \makedefun{defvr}#1 {\deftypevrheader{#1} {} }
+ 
+ % @defcv category class var args
+ \makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
+ 
+ % \defcvof {category of}class var args
+ \def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
+ 
+ % Types:
+ 
+ % @deftp category name args
+ \makedefun{deftp}#1 #2 #3\endheader{%
+   \doind{tp}{\code{#2}}%
+   \defname{#1}{}{#2}\defunargs{#3\unskip}%
+ }
+ 
+ % Remaining @defun-like shortcuts:
+ \makedefun{defun}{\deffnheader{\putwordDeffunc} }
+ \makedefun{defmac}{\deffnheader{\putwordDefmac} }
+ \makedefun{defspec}{\deffnheader{\putwordDefspec} }
+ \makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
+ \makedefun{defvar}{\defvrheader{\putwordDefvar} }
+ \makedefun{defopt}{\defvrheader{\putwordDefopt} }
+ \makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
+ \makedefun{defmethod}{\defopon\putwordMethodon}
+ \makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
+ \makedefun{defivar}{\defcvof\putwordInstanceVariableof}
+ \makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
+ 
+ % \defname, which formats the name of the @def (not the args).
+ % #1 is the category, such as "Function".
+ % #2 is the return type, if any.
+ % #3 is the function name.
+ %
+ % We are followed by (but not passed) the arguments, if any.
+ %
+ \def\defname#1#2#3{%
+   \par
+   % Get the values of \leftskip and \rightskip as they were outside the @def...
+   \advance\leftskip by -\defbodyindent
+   %
+   % Determine if we are typesetting the return type of a typed function
+   % on a line by itself.
+   \rettypeownlinefalse
+   \ifdoingtypefn  % doing a typed function specifically?
+     % then check user option for putting return type on its own line:
+     \expandafter\ifx\csname SETtxideftypefnnl\endcsname\relax \else
+       \rettypeownlinetrue
+     \fi
+   \fi
+   %
+   % How we'll format the category name.  Putting it in brackets helps
+   % distinguish it from the body text that may end up on the next line
+   % just below it.
+   \def\temp{#1}%
+   \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
+   %
+   % Figure out line sizes for the paragraph shape.  We'll always have at
+   % least two.
+   \tempnum = 2
+   %
+   % The first line needs space for \box0; but if \rightskip is nonzero,
+   % we need only space for the part of \box0 which exceeds it:
+   \dimen0=\hsize  \advance\dimen0 by -\wd0  \advance\dimen0 by \rightskip
+   %
+   % If doing a return type on its own line, we'll have another line.
+   \ifrettypeownline
+     \advance\tempnum by 1
+     \def\maybeshapeline{0in \hsize}%
+   \else
+     \def\maybeshapeline{}%
+   \fi
+   %
+   % The continuations:
+   \dimen2=\hsize  \advance\dimen2 by -\defargsindent
+   %
+   % The final paragraph shape:
+   \parshape \tempnum  0in \dimen0  \maybeshapeline  \defargsindent \dimen2
+   %
+   % Put the category name at the right margin.
+   \noindent
+   \hbox to 0pt{%
+     \hfil\box0 \kern-\hsize
+     % \hsize has to be shortened this way:
+     \kern\leftskip
+     % Intentionally do not respect \rightskip, since we need the space.
+   }%
+   %
+   % Allow all lines to be underfull without complaint:
+   \tolerance=10000 \hbadness=10000
+   \exdentamount=\defbodyindent
+   {%
+     % defun fonts. We use typewriter by default (used to be bold) because:
+     % . we're printing identifiers, they should be in tt in principle.
+     % . in languages with many accents, such as Czech or French, it's
+     %   common to leave accents off identifiers.  The result looks ok in
+     %   tt, but exceedingly strange in rm.
+     % . we don't want -- and --- to be treated as ligatures.
+     % . this still does not fix the ?` and !` ligatures, but so far no
+     %   one has made identifiers using them :).
+     \df \tt
+     \def\temp{#2}% text of the return type
+     \ifx\temp\empty\else
+       \tclose{\temp}% typeset the return type
+       \ifrettypeownline
+         % put return type on its own line; prohibit line break following:
+         \hfil\vadjust{\nobreak}\break  
+       \else
+         \space  % type on same line, so just followed by a space
+       \fi
+     \fi           % no return type
+     #3% output function name
+   }%
+   {\rm\enskip}% hskip 0.5 em of \tenrm
+   %
+   \boldbrax
+   % arguments will be output next, if any.
+ }
+ 
+ % Print arguments in slanted roman (not ttsl), inconsistently with using
+ % tt for the name.  This is because literal text is sometimes needed in
+ % the argument list (groff manual), and ttsl and tt are not very
+ % distinguishable.  Prevent hyphenation at `-' chars.
+ %
+ \def\defunargs#1{%
+   % use sl by default (not ttsl),
+   % tt for the names.
+   \df \sl \hyphenchar\font=0
+   %
+   % On the other hand, if an argument has two dashes (for instance), we
+   % want a way to get ttsl.  We used to recommend @var for that, so
+   % leave the code in, but it's strange for @var to lead to typewriter.
+   % Nowadays we recommend @code, since the difference between a ttsl hyphen
+   % and a tt hyphen is pretty tiny.  @code also disables ?` !`.
+   \def\var##1{{\setupmarkupstyle{var}\ttslanted{##1}}}%
+   #1%
+   \sl\hyphenchar\font=45
+ }
+ 
+ % We want ()&[] to print specially on the defun line.
+ %
+ \def\activeparens{%
+   \catcode`\(=\active \catcode`\)=\active
+   \catcode`\[=\active \catcode`\]=\active
+   \catcode`\&=\active
+ }
+ 
+ % Make control sequences which act like normal parenthesis chars.
+ \let\lparen = ( \let\rparen = )
+ 
+ % Be sure that we always have a definition for `(', etc.  For example,
+ % if the fn name has parens in it, \boldbrax will not be in effect yet,
+ % so TeX would otherwise complain about undefined control sequence.
+ {
+   \activeparens
+   \global\let(=\lparen \global\let)=\rparen
+   \global\let[=\lbrack \global\let]=\rbrack
+   \global\let& = \&
+ 
+   \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
+   \gdef\magicamp{\let&=\amprm}
+ }
+ 
+ \newcount\parencount
+ 
+ % If we encounter &foo, then turn on ()-hacking afterwards
+ \newif\ifampseen
+ \def\amprm#1 {\ampseentrue{\bf\&#1 }}
+ 
+ \def\parenfont{%
+   \ifampseen
+     % At the first level, print parens in roman,
+     % otherwise use the default font.
+     \ifnum \parencount=1 \rm \fi
+   \else
+     % The \sf parens (in \boldbrax) actually are a little bolder than
+     % the contained text.  This is especially needed for [ and ] .
+     \sf
+   \fi
+ }
+ \def\infirstlevel#1{%
+   \ifampseen
+     \ifnum\parencount=1
+       #1%
+     \fi
+   \fi
+ }
+ \def\bfafterword#1 {#1 \bf}
+ 
+ \def\opnr{%
+   \global\advance\parencount by 1
+   {\parenfont(}%
+   \infirstlevel \bfafterword
+ }
+ \def\clnr{%
+   {\parenfont)}%
+   \infirstlevel \sl
+   \global\advance\parencount by -1
+ }
+ 
+ \newcount\brackcount
+ \def\lbrb{%
+   \global\advance\brackcount by 1
+   {\bf[}%
+ }
+ \def\rbrb{%
+   {\bf]}%
+   \global\advance\brackcount by -1
+ }
+ 
+ \def\checkparencounts{%
+   \ifnum\parencount=0 \else \badparencount \fi
+   \ifnum\brackcount=0 \else \badbrackcount \fi
+ }
+ % these should not use \errmessage; the glibc manual, at least, actually
+ % has such constructs (when documenting function pointers).
+ \def\badparencount{%
+   \message{Warning: unbalanced parentheses in @def...}%
+   \global\parencount=0
+ }
+ \def\badbrackcount{%
+   \message{Warning: unbalanced square brackets in @def...}%
+   \global\brackcount=0
+ }
+ 
+ 
+ \message{macros,}
+ % @macro.
+ 
+ % To do this right we need a feature of e-TeX, \scantokens,
+ % which we arrange to emulate with a temporary file in ordinary TeX.
+ \ifx\eTeXversion\thisisundefined
+   \newwrite\macscribble
+   \def\scantokens#1{%
+     \toks0={#1}%
+     \immediate\openout\macscribble=\jobname.tmp
+     \immediate\write\macscribble{\the\toks0}%
+     \immediate\closeout\macscribble
+     \input \jobname.tmp
+   }
+ \fi
+ 
+ \def\scanmacro#1{\begingroup
+   \newlinechar`\^^M
+   \let\xeatspaces\eatspaces
+   %
+   % Undo catcode changes of \startcontents and \doprintindex
+   % When called from @insertcopying or (short)caption, we need active
+   % backslash to get it printed correctly.  Previously, we had
+   % \catcode`\\=\other instead.  We'll see whether a problem appears
+   % with macro expansion.				--kasal, 19aug04
+   \catcode`\@=0 \catcode`\\=\active \escapechar=`\@
+   %
+   % ... and for \example:
+   \spaceisspace
+   %
+   % The \empty here causes a following catcode 5 newline to be eaten as
+   % part of reading whitespace after a control sequence.  It does not
+   % eat a catcode 13 newline.  There's no good way to handle the two
+   % cases (untried: maybe e-TeX's \everyeof could help, though plain TeX
+   % would then have different behavior).  See the Macro Details node in
+   % the manual for the workaround we recommend for macros and
+   % line-oriented commands.
+   % 
+   \scantokens{#1\empty}%
+ \endgroup}
+ 
+ \def\scanexp#1{%
+   \edef\temp{\noexpand\scanmacro{#1}}%
+   \temp
+ }
+ 
+ \newcount\paramno   % Count of parameters
+ \newtoks\macname    % Macro name
+ \newif\ifrecursive  % Is it recursive?
+ 
+ % List of all defined macros in the form
+ %    \definedummyword\macro1\definedummyword\macro2...
+ % Currently is also contains all @aliases; the list can be split
+ % if there is a need.
+ \def\macrolist{}
+ 
+ % Add the macro to \macrolist
+ \def\addtomacrolist#1{\expandafter \addtomacrolistxxx \csname#1\endcsname}
+ \def\addtomacrolistxxx#1{%
+      \toks0 = \expandafter{\macrolist\definedummyword#1}%
+      \xdef\macrolist{\the\toks0}%
+ }
+ 
+ % Utility routines.
+ % This does \let #1 = #2, with \csnames; that is,
+ %   \let \csname#1\endcsname = \csname#2\endcsname
+ % (except of course we have to play expansion games).
+ %
+ \def\cslet#1#2{%
+   \expandafter\let
+   \csname#1\expandafter\endcsname
+   \csname#2\endcsname
+ }
+ 
+ % Trim leading and trailing spaces off a string.
+ % Concepts from aro-bend problem 15 (see CTAN).
+ {\catcode`\@=11
+ \gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
+ \gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
+ \gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
+ \def\unbrace#1{#1}
+ \unbrace{\gdef\trim@@@ #1 } #2@{#1}
+ }
+ 
+ % Trim a single trailing ^^M off a string.
+ {\catcode`\^^M=\other \catcode`\Q=3%
+ \gdef\eatcr #1{\eatcra #1Q^^MQ}%
+ \gdef\eatcra#1^^MQ{\eatcrb#1Q}%
+ \gdef\eatcrb#1Q#2Q{#1}%
+ }
+ 
+ % Macro bodies are absorbed as an argument in a context where
+ % all characters are catcode 10, 11 or 12, except \ which is active
+ % (as in normal texinfo). It is necessary to change the definition of \
+ % to recognize macro arguments; this is the job of \mbodybackslash.
+ %
+ % Non-ASCII encodings make 8-bit characters active, so un-activate
+ % them to avoid their expansion.  Must do this non-globally, to
+ % confine the change to the current group.
+ %
+ % It's necessary to have hard CRs when the macro is executed. This is
+ % done by making ^^M (\endlinechar) catcode 12 when reading the macro
+ % body, and then making it the \newlinechar in \scanmacro.
+ %
+ \def\scanctxt{% used as subroutine
+   \catcode`\"=\other
+   \catcode`\+=\other
+   \catcode`\<=\other
+   \catcode`\>=\other
+   \catcode`\@=\other
+   \catcode`\^=\other
+   \catcode`\_=\other
+   \catcode`\|=\other
+   \catcode`\~=\other
+   \ifx\declaredencoding\ascii \else \setnonasciicharscatcodenonglobal\other \fi
+ }
+ 
+ \def\scanargctxt{% used for copying and captions, not macros.
+   \scanctxt
+   \catcode`\\=\other
+   \catcode`\^^M=\other
+ }
+ 
+ \def\macrobodyctxt{% used for @macro definitions
+   \scanctxt
+   \catcode`\{=\other
+   \catcode`\}=\other
+   \catcode`\^^M=\other
+   \usembodybackslash
+ }
+ 
+ \def\macroargctxt{% used when scanning invocations
+   \scanctxt
+   \catcode`\\=0
+ }
+ % why catcode 0 for \ in the above?  To recognize \\ \{ \} as "escapes"
+ % for the single characters \ { }.  Thus, we end up with the "commands"
+ % that would be written @\ @{ @} in a Texinfo document.
+ % 
+ % We already have @{ and @}.  For @\, we define it here, and only for
+ % this purpose, to produce a typewriter backslash (so, the @\ that we
+ % define for @math can't be used with @macro calls):
+ %
+ \def\\{\normalbackslash}%
+ % 
+ % We would like to do this for \, too, since that is what makeinfo does.
+ % But it is not possible, because Texinfo already has a command @, for a
+ % cedilla accent.  Documents must use @comma{} instead.
+ %
+ % \anythingelse will almost certainly be an error of some kind.
+ 
+ 
+ % \mbodybackslash is the definition of \ in @macro bodies.
+ % It maps \foo\ => \csname macarg.foo\endcsname => #N
+ % where N is the macro parameter number.
+ % We define \csname macarg.\endcsname to be \realbackslash, so
+ % \\ in macro replacement text gets you a backslash.
+ %
+ {\catcode`@=0 @catcode`@\=@active
+  @gdef@usembodybackslash{@let\=@mbodybackslash}
+  @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
+ }
+ \expandafter\def\csname macarg.\endcsname{\realbackslash}
+ 
+ \def\margbackslash#1{\char`\#1 }
+ 
+ \def\macro{\recursivefalse\parsearg\macroxxx}
+ \def\rmacro{\recursivetrue\parsearg\macroxxx}
+ 
+ \def\macroxxx#1{%
+   \getargs{#1}% now \macname is the macname and \argl the arglist
+   \ifx\argl\empty       % no arguments
+      \paramno=0\relax
+   \else
+      \expandafter\parsemargdef \argl;%
+      \if\paramno>256\relax
+        \ifx\eTeXversion\thisisundefined
+          \errhelp = \EMsimple
+          \errmessage{You need eTeX to compile a file with macros with more than 256 arguments}
+        \fi
+      \fi
+   \fi
+   \if1\csname ismacro.\the\macname\endcsname
+      \message{Warning: redefining \the\macname}%
+   \else
+      \expandafter\ifx\csname \the\macname\endcsname \relax
+      \else \errmessage{Macro name \the\macname\space already defined}\fi
+      \global\cslet{macsave.\the\macname}{\the\macname}%
+      \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
+      \addtomacrolist{\the\macname}%
+   \fi
+   \begingroup \macrobodyctxt
+   \ifrecursive \expandafter\parsermacbody
+   \else \expandafter\parsemacbody
+   \fi}
+ 
+ \parseargdef\unmacro{%
+   \if1\csname ismacro.#1\endcsname
+     \global\cslet{#1}{macsave.#1}%
+     \global\expandafter\let \csname ismacro.#1\endcsname=0%
+     % Remove the macro name from \macrolist:
+     \begingroup
+       \expandafter\let\csname#1\endcsname \relax
+       \let\definedummyword\unmacrodo
+       \xdef\macrolist{\macrolist}%
+     \endgroup
+   \else
+     \errmessage{Macro #1 not defined}%
+   \fi
+ }
+ 
+ % Called by \do from \dounmacro on each macro.  The idea is to omit any
+ % macro definitions that have been changed to \relax.
+ %
+ \def\unmacrodo#1{%
+   \ifx #1\relax
+     % remove this
+   \else
+     \noexpand\definedummyword \noexpand#1%
+   \fi
+ }
+ 
+ % This makes use of the obscure feature that if the last token of a
+ % <parameter list> is #, then the preceding argument is delimited by
+ % an opening brace, and that opening brace is not consumed.
+ \def\getargs#1{\getargsxxx#1{}}
+ \def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
+ \def\getmacname#1 #2\relax{\macname={#1}}
+ \def\getmacargs#1{\def\argl{#1}}
+ 
+ % For macro processing make @ a letter so that we can make Texinfo private macro names.
+ \edef\texiatcatcode{\the\catcode`\@}
+ \catcode `@=11\relax
+ 
+ % Parse the optional {params} list.  Set up \paramno and \paramlist
+ % so \defmacro knows what to do.  Define \macarg.BLAH for each BLAH
+ % in the params list to some hook where the argument si to be expanded.  If
+ % there are less than 10 arguments that hook is to be replaced by ##N where N
+ % is the position in that list, that is to say the macro arguments are to be
+ % defined `a la TeX in the macro body.  
+ %
+ % That gets used by \mbodybackslash (above).
+ %
+ % We need to get `macro parameter char #' into several definitions.
+ % The technique used is stolen from LaTeX: let \hash be something
+ % unexpandable, insert that wherever you need a #, and then redefine
+ % it to # just before using the token list produced.
+ %
+ % The same technique is used to protect \eatspaces till just before
+ % the macro is used.
+ %
+ % If there are 10 or more arguments, a different technique is used, where the
+ % hook remains in the body, and when macro is to be expanded the body is
+ % processed again to replace the arguments.
+ %
+ % In that case, the hook is \the\toks N-1, and we simply set \toks N-1 to the
+ % argument N value and then \edef  the body (nothing else will expand because of
+ % the catcode regime underwhich the body was input).
+ %
+ % If you compile with TeX (not eTeX), and you have macros with 10 or more
+ % arguments, you need that no macro has more than 256 arguments, otherwise an
+ % error is produced.
+ \def\parsemargdef#1;{%
+   \paramno=0\def\paramlist{}%
+   \let\hash\relax
+   \let\xeatspaces\relax
+   \parsemargdefxxx#1,;,%
+   % In case that there are 10 or more arguments we parse again the arguments
+   % list to set new definitions for the \macarg.BLAH macros corresponding to
+   % each BLAH argument. It was anyhow needed to parse already once this list
+   % in order to count the arguments, and as macros with at most 9 arguments
+   % are by far more frequent than macro with 10 or more arguments, defining
+   % twice the \macarg.BLAH macros does not cost too much processing power.
+   \ifnum\paramno<10\relax\else
+     \paramno0\relax
+     \parsemmanyargdef@@#1,;,% 10 or more arguments
+   \fi
+ }
+ \def\parsemargdefxxx#1,{%
+   \if#1;\let\next=\relax
+   \else \let\next=\parsemargdefxxx
+     \advance\paramno by 1
+     \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
+         {\xeatspaces{\hash\the\paramno}}%
+     \edef\paramlist{\paramlist\hash\the\paramno,}%
+   \fi\next}
+ 
+ \def\parsemmanyargdef@@#1,{%
+   \if#1;\let\next=\relax
+   \else 
+     \let\next=\parsemmanyargdef@@
+     \edef\tempb{\eatspaces{#1}}%
+     \expandafter\def\expandafter\tempa
+        \expandafter{\csname macarg.\tempb\endcsname}%
+     % Note that we need some extra \noexpand\noexpand, this is because we
+     % don't want \the  to be expanded in the \parsermacbody  as it uses an
+     % \xdef .
+     \expandafter\edef\tempa
+       {\noexpand\noexpand\noexpand\the\toks\the\paramno}%
+     \advance\paramno by 1\relax
+   \fi\next}
+ 
+ % These two commands read recursive and nonrecursive macro bodies.
+ % (They're different since rec and nonrec macros end differently.)
+ %
+ 
+ \catcode `\@\texiatcatcode
+ \long\def\parsemacbody#1@end macro%
+ {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
+ \long\def\parsermacbody#1@end rmacro%
+ {\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
+ \catcode `\@=11\relax
+ 
+ \let\endargs@\relax
+ \let\nil@\relax
+ \def\nilm@{\nil@}%
+ \long\def\nillm@{\nil@}%
+ 
+ % This macro is expanded during the Texinfo macro expansion, not during its
+ % definition.  It gets all the arguments values and assigns them to macros
+ % macarg.ARGNAME
+ %
+ % #1 is the macro name
+ % #2 is the list of argument names
+ % #3 is the list of argument values
+ \def\getargvals@#1#2#3{%
+   \def\macargdeflist@{}%
+   \def\saveparamlist@{#2}% Need to keep a copy for parameter expansion.
+   \def\paramlist{#2,\nil@}%
+   \def\macroname{#1}%
+   \begingroup
+   \macroargctxt
+   \def\argvaluelist{#3,\nil@}%
+   \def\@tempa{#3}%
+   \ifx\@tempa\empty
+     \setemptyargvalues@
+   \else
+     \getargvals@@
+   \fi
+ }
+ 
+ % 
+ \def\getargvals@@{%
+   \ifx\paramlist\nilm@
+       % Some sanity check needed here that \argvaluelist is also empty.
+       \ifx\argvaluelist\nillm@
+       \else
+         \errhelp = \EMsimple
+         \errmessage{Too many arguments in macro `\macroname'!}%
+       \fi
+       \let\next\macargexpandinbody@
+   \else
+     \ifx\argvaluelist\nillm@
+        % No more arguments values passed to macro.  Set remaining named-arg
+        % macros to empty.
+        \let\next\setemptyargvalues@
+     \else
+       % pop current arg name into \@tempb
+       \def\@tempa##1{\pop@{\@tempb}{\paramlist}##1\endargs@}%
+       \expandafter\@tempa\expandafter{\paramlist}%
+        % pop current argument value into \@tempc
+       \def\@tempa##1{\longpop@{\@tempc}{\argvaluelist}##1\endargs@}%
+       \expandafter\@tempa\expandafter{\argvaluelist}%
+        % Here \@tempb is the current arg name and \@tempc is the current arg value.
+        % First place the new argument macro definition into \@tempd
+        \expandafter\macname\expandafter{\@tempc}%
+        \expandafter\let\csname macarg.\@tempb\endcsname\relax
+        \expandafter\def\expandafter\@tempe\expandafter{%
+          \csname macarg.\@tempb\endcsname}%
+        \edef\@tempd{\long\def\@tempe{\the\macname}}%
+        \push@\@tempd\macargdeflist@
+        \let\next\getargvals@@
+     \fi
+   \fi
+   \next
+ }
+ 
+ \def\push@#1#2{%
+   \expandafter\expandafter\expandafter\def
+   \expandafter\expandafter\expandafter#2%
+   \expandafter\expandafter\expandafter{%
+   \expandafter#1#2}%
+ }
+ 
+ % Replace arguments by their values in the macro body, and place the result
+ % in macro \@tempa
+ \def\macvalstoargs@{%
+   %  To do this we use the property that token registers that are \the'ed
+   % within an \edef  expand only once. So we are going to place all argument
+   % values into respective token registers.
+   %
+   % First we save the token context, and initialize argument numbering.
+   \begingroup
+     \paramno0\relax
+     % Then, for each argument number #N, we place the corresponding argument
+     % value into a new token list register \toks#N
+     \expandafter\putargsintokens@\saveparamlist@,;,%
+     % Then, we expand the body so that argument are replaced by their
+     % values. The trick for values not to be expanded themselves is that they
+     % are within tokens and that tokens expand only once in an \edef .
+     \edef\@tempc{\csname mac.\macroname .body\endcsname}%
+     % Now we restore the token stack pointer to free the token list registers
+     % which we have used, but we make sure that expanded body is saved after
+     % group.
+     \expandafter
+   \endgroup
+   \expandafter\def\expandafter\@tempa\expandafter{\@tempc}%
+   }
+ 
+ \def\macargexpandinbody@{% 
+   %% Define the named-macro outside of this group and then close this group. 
+   \expandafter
+   \endgroup
+   \macargdeflist@
+   % First the replace in body the macro arguments by their values, the result
+   % is in \@tempa .
+   \macvalstoargs@
+   % Then we point at the \norecurse or \gobble (for recursive) macro value
+   % with \@tempb .
+   \expandafter\let\expandafter\@tempb\csname mac.\macroname .recurse\endcsname
+   % Depending on whether it is recursive or not, we need some tailing
+   % \egroup .
+   \ifx\@tempb\gobble
+      \let\@tempc\relax
+   \else
+      \let\@tempc\egroup
+   \fi
+   % And now we do the real job:
+   \edef\@tempd{\noexpand\@tempb{\macroname}\noexpand\scanmacro{\@tempa}\@tempc}%
+   \@tempd
+ }
+ 
+ \def\putargsintokens@#1,{%
+   \if#1;\let\next\relax
+   \else
+     \let\next\putargsintokens@
+     % First we allocate the new token list register, and give it a temporary
+     % alias \@tempb .
+     \toksdef\@tempb\the\paramno
+     % Then we place the argument value into that token list register.
+     \expandafter\let\expandafter\@tempa\csname macarg.#1\endcsname
+     \expandafter\@tempb\expandafter{\@tempa}%
+     \advance\paramno by 1\relax
+   \fi
+   \next
+ }
+ 
+ % Save the token stack pointer into macro #1
+ \def\texisavetoksstackpoint#1{\edef#1{\the\@cclvi}}
+ % Restore the token stack pointer from number in macro #1
+ \def\texirestoretoksstackpoint#1{\expandafter\mathchardef\expandafter\@cclvi#1\relax}
+ % newtoks that can be used non \outer .
+ \def\texinonouternewtoks{\alloc@ 5\toks \toksdef \@cclvi}
+ 
+ % Tailing missing arguments are set to empty
+ \def\setemptyargvalues@{%
+   \ifx\paramlist\nilm@
+     \let\next\macargexpandinbody@
+   \else
+     \expandafter\setemptyargvaluesparser@\paramlist\endargs@
+     \let\next\setemptyargvalues@
+   \fi
+   \next
+ }
+ 
+ \def\setemptyargvaluesparser@#1,#2\endargs@{%
+   \expandafter\def\expandafter\@tempa\expandafter{%
+     \expandafter\def\csname macarg.#1\endcsname{}}%
+   \push@\@tempa\macargdeflist@
+   \def\paramlist{#2}%
+ }
+ 
+ % #1 is the element target macro
+ % #2 is the list macro
+ % #3,#4\endargs@ is the list value
+ \def\pop@#1#2#3,#4\endargs@{%
+    \def#1{#3}%
+    \def#2{#4}%
+ }
+ \long\def\longpop@#1#2#3,#4\endargs@{%
+    \long\def#1{#3}%
+    \long\def#2{#4}%
+ }
+ 
+ % This defines a Texinfo @macro. There are eight cases: recursive and
+ % nonrecursive macros of zero, one, up to nine, and many arguments.
+ % Much magic with \expandafter here.
+ % \xdef is used so that macro definitions will survive the file
+ % they're defined in; @include reads the file inside a group.
+ %
+ \def\defmacro{%
+   \let\hash=##% convert placeholders to macro parameter chars
+   \ifrecursive
+     \ifcase\paramno
+     % 0
+       \expandafter\xdef\csname\the\macname\endcsname{%
+         \noexpand\scanmacro{\temp}}%
+     \or % 1
+       \expandafter\xdef\csname\the\macname\endcsname{%
+          \bgroup\noexpand\macroargctxt
+          \noexpand\braceorline
+          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
+       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
+          \egroup\noexpand\scanmacro{\temp}}%
+     \else
+       \ifnum\paramno<10\relax % at most 9
+         \expandafter\xdef\csname\the\macname\endcsname{%
+            \bgroup\noexpand\macroargctxt
+            \noexpand\csname\the\macname xx\endcsname}%
+         \expandafter\xdef\csname\the\macname xx\endcsname##1{%
+             \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
+         \expandafter\expandafter
+         \expandafter\xdef
+         \expandafter\expandafter
+           \csname\the\macname xxx\endcsname
+             \paramlist{\egroup\noexpand\scanmacro{\temp}}%
+       \else % 10 or more
+         \expandafter\xdef\csname\the\macname\endcsname{%
+           \noexpand\getargvals@{\the\macname}{\argl}%
+         }%    
+         \global\expandafter\let\csname mac.\the\macname .body\endcsname\temp
+         \global\expandafter\let\csname mac.\the\macname .recurse\endcsname\gobble
+       \fi
+     \fi
+   \else
+     \ifcase\paramno
+     % 0
+       \expandafter\xdef\csname\the\macname\endcsname{%
+         \noexpand\norecurse{\the\macname}%
+         \noexpand\scanmacro{\temp}\egroup}%
+     \or % 1
+       \expandafter\xdef\csname\the\macname\endcsname{%
+          \bgroup\noexpand\macroargctxt
+          \noexpand\braceorline
+          \expandafter\noexpand\csname\the\macname xxx\endcsname}%
+       \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
+         \egroup
+         \noexpand\norecurse{\the\macname}%
+         \noexpand\scanmacro{\temp}\egroup}%
+     \else % at most 9
+       \ifnum\paramno<10\relax
+         \expandafter\xdef\csname\the\macname\endcsname{%
+            \bgroup\noexpand\macroargctxt
+            \expandafter\noexpand\csname\the\macname xx\endcsname}%
+         \expandafter\xdef\csname\the\macname xx\endcsname##1{%
+             \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
+         \expandafter\expandafter
+         \expandafter\xdef
+         \expandafter\expandafter
+         \csname\the\macname xxx\endcsname
+         \paramlist{%
+             \egroup
+             \noexpand\norecurse{\the\macname}%
+             \noexpand\scanmacro{\temp}\egroup}%
+       \else % 10 or more:
+         \expandafter\xdef\csname\the\macname\endcsname{%
+           \noexpand\getargvals@{\the\macname}{\argl}%
+         }%
+         \global\expandafter\let\csname mac.\the\macname .body\endcsname\temp
+         \global\expandafter\let\csname mac.\the\macname .recurse\endcsname\norecurse
+       \fi
+     \fi
+   \fi}
+ 
+ \catcode `\@\texiatcatcode\relax
+ 
+ \def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
+ 
+ % \braceorline decides whether the next nonwhitespace character is a
+ % {.  If so it reads up to the closing }, if not, it reads the whole
+ % line.  Whatever was read is then fed to the next control sequence
+ % as an argument (by \parsebrace or \parsearg).
+ % 
+ \def\braceorline#1{\let\macnamexxx=#1\futurelet\nchar\braceorlinexxx}
+ \def\braceorlinexxx{%
+   \ifx\nchar\bgroup\else
+     \expandafter\parsearg
+   \fi \macnamexxx}
+ 
+ 
+ % @alias.
+ % We need some trickery to remove the optional spaces around the equal
+ % sign.  Make them active and then expand them all to nothing.
+ %
+ \def\alias{\parseargusing\obeyspaces\aliasxxx}
+ \def\aliasxxx #1{\aliasyyy#1\relax}
+ \def\aliasyyy #1=#2\relax{%
+   {%
+     \expandafter\let\obeyedspace=\empty
+     \addtomacrolist{#1}%
+     \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
+   }%
+   \next
+ }
+ 
+ 
+ \message{cross references,}
+ 
+ \newwrite\auxfile
+ \newif\ifhavexrefs    % True if xref values are known.
+ \newif\ifwarnedxrefs  % True if we warned once that they aren't known.
+ 
+ % @inforef is relatively simple.
+ \def\inforef #1{\inforefzzz #1,,,,**}
+ \def\inforefzzz #1,#2,#3,#4**{%
+   \putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
+   node \samp{\ignorespaces#1{}}}
+ 
+ % @node's only job in TeX is to define \lastnode, which is used in
+ % cross-references.  The @node line might or might not have commas, and
+ % might or might not have spaces before the first comma, like:
+ % @node foo , bar , ...
+ % We don't want such trailing spaces in the node name.
+ %
+ \parseargdef\node{\checkenv{}\donode #1 ,\finishnodeparse}
+ %
+ % also remove a trailing comma, in case of something like this:
+ % @node Help-Cross,  ,  , Cross-refs
+ \def\donode#1 ,#2\finishnodeparse{\dodonode #1,\finishnodeparse}
+ \def\dodonode#1,#2\finishnodeparse{\gdef\lastnode{#1}}
+ 
+ \let\nwnode=\node
+ \let\lastnode=\empty
+ 
+ % Write a cross-reference definition for the current node.  #1 is the
+ % type (Ynumbered, Yappendix, Ynothing).
+ %
+ \def\donoderef#1{%
+   \ifx\lastnode\empty\else
+     \setref{\lastnode}{#1}%
+     \global\let\lastnode=\empty
+   \fi
+ }
+ 
+ % @anchor{NAME} -- define xref target at arbitrary point.
+ %
+ \newcount\savesfregister
+ %
+ \def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
+ \def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
+ \def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
+ 
+ % \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
+ % anchor), which consists of three parts:
+ % 1) NAME-title - the current sectioning name taken from \lastsection,
+ %                 or the anchor name.
+ % 2) NAME-snt   - section number and type, passed as the SNT arg, or
+ %                 empty for anchors.
+ % 3) NAME-pg    - the page number.
+ %
+ % This is called from \donoderef, \anchor, and \dofloat.  In the case of
+ % floats, there is an additional part, which is not written here:
+ % 4) NAME-lof   - the text as it should appear in a @listoffloats.
+ %
+ \def\setref#1#2{%
+   \pdfmkdest{#1}%
+   \iflinks
+     {%
+       \atdummies  % preserve commands, but don't expand them
+       \edef\writexrdef##1##2{%
+ 	\write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
+ 	  ##1}{##2}}% these are parameters of \writexrdef
+       }%
+       \toks0 = \expandafter{\lastsection}%
+       \immediate \writexrdef{title}{\the\toks0 }%
+       \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
+       \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, at \shipout
+     }%
+   \fi
+ }
+ 
+ % @xrefautosectiontitle on|off says whether @section(ing) names are used
+ % automatically in xrefs, if the third arg is not explicitly specified.
+ % This was provided as a "secret" @set xref-automatic-section-title
+ % variable, now it's official.
+ % 
+ \parseargdef\xrefautomaticsectiontitle{%
+   \def\temp{#1}%
+   \ifx\temp\onword
+     \expandafter\let\csname SETxref-automatic-section-title\endcsname
+       = \empty
+   \else\ifx\temp\offword
+     \expandafter\let\csname SETxref-automatic-section-title\endcsname
+       = \relax
+   \else
+     \errhelp = \EMsimple
+     \errmessage{Unknown @xrefautomaticsectiontitle value `\temp',
+                 must be on|off}%
+   \fi\fi
+ }
+ 
+ % 
+ % @xref, @pxref, and @ref generate cross-references.  For \xrefX, #1 is
+ % the node name, #2 the name of the Info cross-reference, #3 the printed
+ % node name, #4 the name of the Info file, #5 the name of the printed
+ % manual.  All but the node name can be omitted.
+ %
+ \def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
+ \def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
+ \def\ref#1{\xrefX[#1,,,,,,,]}
+ %
+ \newbox\toprefbox
+ \newbox\printedrefnamebox
+ \newbox\infofilenamebox
+ \newbox\printedmanualbox
+ %
+ \def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
+   \unsepspaces
+   %
+   % Get args without leading/trailing spaces.
+   \def\printedrefname{\ignorespaces #3}%
+   \setbox\printedrefnamebox = \hbox{\printedrefname\unskip}%
+   %
+   \def\infofilename{\ignorespaces #4}%
+   \setbox\infofilenamebox = \hbox{\infofilename\unskip}%
+   %
+   \def\printedmanual{\ignorespaces #5}%
+   \setbox\printedmanualbox  = \hbox{\printedmanual\unskip}%
+   %
+   % If the printed reference name (arg #3) was not explicitly given in
+   % the @xref, figure out what we want to use.
+   \ifdim \wd\printedrefnamebox = 0pt
+     % No printed node name was explicitly given.
+     \expandafter\ifx\csname SETxref-automatic-section-title\endcsname \relax
+       % Not auto section-title: use node name inside the square brackets.
+       \def\printedrefname{\ignorespaces #1}%
+     \else
+       % Auto section-title: use chapter/section title inside
+       % the square brackets if we have it.
+       \ifdim \wd\printedmanualbox > 0pt
+         % It is in another manual, so we don't have it; use node name.
+         \def\printedrefname{\ignorespaces #1}%
+       \else
+         \ifhavexrefs
+           % We (should) know the real title if we have the xref values.
+           \def\printedrefname{\refx{#1-title}{}}%
+         \else
+           % Otherwise just copy the Info node name.
+           \def\printedrefname{\ignorespaces #1}%
+         \fi%
+       \fi
+     \fi
+   \fi
+   %
+   % Make link in pdf output.
+   \ifpdf
+     {\indexnofonts
+      \turnoffactive
+      \makevalueexpandable
+      % This expands tokens, so do it after making catcode changes, so _
+      % etc. don't get their TeX definitions.  This ignores all spaces in
+      % #4, including (wrongly) those in the middle of the filename.
+      \getfilename{#4}%
+      %
+      % This (wrongly) does not take account of leading or trailing
+      % spaces in #1, which should be ignored.
+      \edef\pdfxrefdest{#1}%
+      \ifx\pdfxrefdest\empty
+        \def\pdfxrefdest{Top}% no empty targets
+      \else
+        \txiescapepdf\pdfxrefdest  % escape PDF special chars
+      \fi
+      %
+      \leavevmode
+      \startlink attr{/Border [0 0 0]}%
+      \ifnum\filenamelength>0
+        goto file{\the\filename.pdf} name{\pdfxrefdest}%
+      \else
+        goto name{\pdfmkpgn{\pdfxrefdest}}%
+      \fi
+     }%
+     \setcolor{\linkcolor}%
+   \fi
+   %
+   % Float references are printed completely differently: "Figure 1.2"
+   % instead of "[somenode], p.3".  We distinguish them by the
+   % LABEL-title being set to a magic string.
+   {%
+     % Have to otherify everything special to allow the \csname to
+     % include an _ in the xref name, etc.
+     \indexnofonts
+     \turnoffactive
+     \expandafter\global\expandafter\let\expandafter\Xthisreftitle
+       \csname XR#1-title\endcsname
+   }%
+   \iffloat\Xthisreftitle
+     % If the user specified the print name (third arg) to the ref,
+     % print it instead of our usual "Figure 1.2".
+     \ifdim\wd\printedrefnamebox = 0pt
+       \refx{#1-snt}{}%
+     \else
+       \printedrefname
+     \fi
+     %
+     % If the user also gave the printed manual name (fifth arg), append
+     % "in MANUALNAME".
+     \ifdim \wd\printedmanualbox > 0pt
+       \space \putwordin{} \cite{\printedmanual}%
+     \fi
+   \else
+     % node/anchor (non-float) references.
+     % 
+     % If we use \unhbox to print the node names, TeX does not insert
+     % empty discretionaries after hyphens, which means that it will not
+     % find a line break at a hyphen in a node names.  Since some manuals
+     % are best written with fairly long node names, containing hyphens,
+     % this is a loss.  Therefore, we give the text of the node name
+     % again, so it is as if TeX is seeing it for the first time.
+     % 
+     \ifdim \wd\printedmanualbox > 0pt
+       % Cross-manual reference with a printed manual name.
+       % 
+       \crossmanualxref{\cite{\printedmanual\unskip}}%
+     %
+     \else\ifdim \wd\infofilenamebox > 0pt
+       % Cross-manual reference with only an info filename (arg 4), no
+       % printed manual name (arg 5).  This is essentially the same as
+       % the case above; we output the filename, since we have nothing else.
+       % 
+       \crossmanualxref{\code{\infofilename\unskip}}%
+     %
+     \else
+       % Reference within this manual.
+       %
+       % _ (for example) has to be the character _ for the purposes of the
+       % control sequence corresponding to the node, but it has to expand
+       % into the usual \leavevmode...\vrule stuff for purposes of
+       % printing. So we \turnoffactive for the \refx-snt, back on for the
+       % printing, back off for the \refx-pg.
+       {\turnoffactive
+        % Only output a following space if the -snt ref is nonempty; for
+        % @unnumbered and @anchor, it won't be.
+        \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
+        \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
+       }%
+       % output the `[mynode]' via the macro below so it can be overridden.
+       \xrefprintnodename\printedrefname
+       %
+       % But we always want a comma and a space:
+       ,\space
+       %
+       % output the `page 3'.
+       \turnoffactive \putwordpage\tie\refx{#1-pg}{}%
+     \fi\fi
+   \fi
+   \endlink
+ \endgroup}
+ 
+ % Output a cross-manual xref to #1.  Used just above (twice).
+ % 
+ % Only include the text "Section ``foo'' in" if the foo is neither
+ % missing or Top.  Thus, @xref{,,,foo,The Foo Manual} outputs simply
+ % "see The Foo Manual", the idea being to refer to the whole manual.
+ % 
+ % But, this being TeX, we can't easily compare our node name against the
+ % string "Top" while ignoring the possible spaces before and after in
+ % the input.  By adding the arbitrary 7sp below, we make it much less
+ % likely that a real node name would have the same width as "Top" (e.g.,
+ % in a monospaced font).  Hopefully it will never happen in practice.
+ % 
+ % For the same basic reason, we retypeset the "Top" at every
+ % reference, since the current font is indeterminate.
+ % 
+ \def\crossmanualxref#1{%
+   \setbox\toprefbox = \hbox{Top\kern7sp}%
+   \setbox2 = \hbox{\ignorespaces \printedrefname \unskip \kern7sp}%
+   \ifdim \wd2 > 7sp  % nonempty?
+     \ifdim \wd2 = \wd\toprefbox \else  % same as Top?
+       \putwordSection{} ``\printedrefname'' \putwordin{}\space
+     \fi
+   \fi
+   #1%
+ }
+ 
+ % This macro is called from \xrefX for the `[nodename]' part of xref
+ % output.  It's a separate macro only so it can be changed more easily,
+ % since square brackets don't work well in some documents.  Particularly
+ % one that Bob is working on :).
+ %
+ \def\xrefprintnodename#1{[#1]}
+ 
+ % Things referred to by \setref.
+ %
+ \def\Ynothing{}
+ \def\Yomitfromtoc{}
+ \def\Ynumbered{%
+   \ifnum\secno=0
+     \putwordChapter@tie \the\chapno
+   \else \ifnum\subsecno=0
+     \putwordSection@tie \the\chapno.\the\secno
+   \else \ifnum\subsubsecno=0
+     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
+   \else
+     \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
+   \fi\fi\fi
+ }
+ \def\Yappendix{%
+   \ifnum\secno=0
+      \putwordAppendix@tie @char\the\appendixno{}%
+   \else \ifnum\subsecno=0
+      \putwordSection@tie @char\the\appendixno.\the\secno
+   \else \ifnum\subsubsecno=0
+     \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
+   \else
+     \putwordSection@tie
+       @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
+   \fi\fi\fi
+ }
+ 
+ % Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
+ % If its value is nonempty, SUFFIX is output afterward.
+ %
+ \def\refx#1#2{%
+   {%
+     \indexnofonts
+     \otherbackslash
+     \expandafter\global\expandafter\let\expandafter\thisrefX
+       \csname XR#1\endcsname
+   }%
+   \ifx\thisrefX\relax
+     % If not defined, say something at least.
+     \angleleft un\-de\-fined\angleright
+     \iflinks
+       \ifhavexrefs
+         {\toks0 = {#1}% avoid expansion of possibly-complex value
+          \message{\linenumber Undefined cross reference `\the\toks0'.}}%
+       \else
+         \ifwarnedxrefs\else
+           \global\warnedxrefstrue
+           \message{Cross reference values unknown; you must run TeX again.}%
+         \fi
+       \fi
+     \fi
+   \else
+     % It's defined, so just use it.
+     \thisrefX
+   \fi
+   #2% Output the suffix in any case.
+ }
+ 
+ % This is the macro invoked by entries in the aux file.  Usually it's
+ % just a \def (we prepend XR to the control sequence name to avoid
+ % collisions).  But if this is a float type, we have more work to do.
+ %
+ \def\xrdef#1#2{%
+   {% The node name might contain 8-bit characters, which in our current
+    % implementation are changed to commands like @'e.  Don't let these
+    % mess up the control sequence name.
+     \indexnofonts
+     \turnoffactive
+     \xdef\safexrefname{#1}%
+   }%
+   %
+   \expandafter\gdef\csname XR\safexrefname\endcsname{#2}% remember this xref
+   %
+   % Was that xref control sequence that we just defined for a float?
+   \expandafter\iffloat\csname XR\safexrefname\endcsname
+     % it was a float, and we have the (safe) float type in \iffloattype.
+     \expandafter\let\expandafter\floatlist
+       \csname floatlist\iffloattype\endcsname
+     %
+     % Is this the first time we've seen this float type?
+     \expandafter\ifx\floatlist\relax
+       \toks0 = {\do}% yes, so just \do
+     \else
+       % had it before, so preserve previous elements in list.
+       \toks0 = \expandafter{\floatlist\do}%
+     \fi
+     %
+     % Remember this xref in the control sequence \floatlistFLOATTYPE,
+     % for later use in \listoffloats.
+     \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0
+       {\safexrefname}}%
+   \fi
+ }
+ 
+ % Read the last existing aux file, if any.  No error if none exists.
+ %
+ \def\tryauxfile{%
+   \openin 1 \jobname.aux
+   \ifeof 1 \else
+     \readdatafile{aux}%
+     \global\havexrefstrue
+   \fi
+   \closein 1
+ }
+ 
+ \def\setupdatafile{%
+   \catcode`\^^@=\other
+   \catcode`\^^A=\other
+   \catcode`\^^B=\other
+   \catcode`\^^C=\other
+   \catcode`\^^D=\other
+   \catcode`\^^E=\other
+   \catcode`\^^F=\other
+   \catcode`\^^G=\other
+   \catcode`\^^H=\other
+   \catcode`\^^K=\other
+   \catcode`\^^L=\other
+   \catcode`\^^N=\other
+   \catcode`\^^P=\other
+   \catcode`\^^Q=\other
+   \catcode`\^^R=\other
+   \catcode`\^^S=\other
+   \catcode`\^^T=\other
+   \catcode`\^^U=\other
+   \catcode`\^^V=\other
+   \catcode`\^^W=\other
+   \catcode`\^^X=\other
+   \catcode`\^^Z=\other
+   \catcode`\^^[=\other
+   \catcode`\^^\=\other
+   \catcode`\^^]=\other
+   \catcode`\^^^=\other
+   \catcode`\^^_=\other
+   % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
+   % in xref tags, i.e., node names.  But since ^^e4 notation isn't
+   % supported in the main text, it doesn't seem desirable.  Furthermore,
+   % that is not enough: for node names that actually contain a ^
+   % character, we would end up writing a line like this: 'xrdef {'hat
+   % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
+   % argument, and \hat is not an expandable control sequence.  It could
+   % all be worked out, but why?  Either we support ^^ or we don't.
+   %
+   % The other change necessary for this was to define \auxhat:
+   % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
+   % and then to call \auxhat in \setq.
+   %
+   \catcode`\^=\other
+   %
+   % Special characters.  Should be turned off anyway, but...
+   \catcode`\~=\other
+   \catcode`\[=\other
+   \catcode`\]=\other
+   \catcode`\"=\other
+   \catcode`\_=\other
+   \catcode`\|=\other
+   \catcode`\<=\other
+   \catcode`\>=\other
+   \catcode`\$=\other
+   \catcode`\#=\other
+   \catcode`\&=\other
+   \catcode`\%=\other
+   \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
+   %
+   % This is to support \ in node names and titles, since the \
+   % characters end up in a \csname.  It's easier than
+   % leaving it active and making its active definition an actual \
+   % character.  What I don't understand is why it works in the *value*
+   % of the xrdef.  Seems like it should be a catcode12 \, and that
+   % should not typeset properly.  But it works, so I'm moving on for
+   % now.  --karl, 15jan04.
+   \catcode`\\=\other
+   %
+   % Make the characters 128-255 be printing characters.
+   {%
+     \count1=128
+     \def\loop{%
+       \catcode\count1=\other
+       \advance\count1 by 1
+       \ifnum \count1<256 \loop \fi
+     }%
+   }%
+   %
+   % @ is our escape character in .aux files, and we need braces.
+   \catcode`\{=1
+   \catcode`\}=2
+   \catcode`\@=0
+ }
+ 
+ \def\readdatafile#1{%
+ \begingroup
+   \setupdatafile
+   \input\jobname.#1
+ \endgroup}
+ 
+ 
+ \message{insertions,}
+ % including footnotes.
+ 
+ \newcount \footnoteno
+ 
+ % The trailing space in the following definition for supereject is
+ % vital for proper filling; pages come out unaligned when you do a
+ % pagealignmacro call if that space before the closing brace is
+ % removed. (Generally, numeric constants should always be followed by a
+ % space to prevent strange expansion errors.)
+ \def\supereject{\par\penalty -20000\footnoteno =0 }
+ 
+ % @footnotestyle is meaningful for Info output only.
+ \let\footnotestyle=\comment
+ 
+ {\catcode `\@=11
+ %
+ % Auto-number footnotes.  Otherwise like plain.
+ \gdef\footnote{%
+   \let\indent=\ptexindent
+   \let\noindent=\ptexnoindent
+   \global\advance\footnoteno by \@ne
+   \edef\thisfootno{$^{\the\footnoteno}$}%
+   %
+   % In case the footnote comes at the end of a sentence, preserve the
+   % extra spacing after we do the footnote number.
+   \let\@sf\empty
+   \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
+   %
+   % Remove inadvertent blank space before typesetting the footnote number.
+   \unskip
+   \thisfootno\@sf
+   \dofootnote
+ }%
+ 
+ % Don't bother with the trickery in plain.tex to not require the
+ % footnote text as a parameter.  Our footnotes don't need to be so general.
+ %
+ % Oh yes, they do; otherwise, @ifset (and anything else that uses
+ % \parseargline) fails inside footnotes because the tokens are fixed when
+ % the footnote is read.  --karl, 16nov96.
+ %
+ \gdef\dofootnote{%
+   \insert\footins\bgroup
+   % We want to typeset this text as a normal paragraph, even if the
+   % footnote reference occurs in (for example) a display environment.
+   % So reset some parameters.
+   \hsize=\pagewidth
+   \interlinepenalty\interfootnotelinepenalty
+   \splittopskip\ht\strutbox % top baseline for broken footnotes
+   \splitmaxdepth\dp\strutbox
+   \floatingpenalty\@MM
+   \leftskip\z@skip
+   \rightskip\z@skip
+   \spaceskip\z@skip
+   \xspaceskip\z@skip
+   \parindent\defaultparindent
+   %
+   \smallfonts \rm
+   %
+   % Because we use hanging indentation in footnotes, a @noindent appears
+   % to exdent this text, so make it be a no-op.  makeinfo does not use
+   % hanging indentation so @noindent can still be needed within footnote
+   % text after an @example or the like (not that this is good style).
+   \let\noindent = \relax
+   %
+   % Hang the footnote text off the number.  Use \everypar in case the
+   % footnote extends for more than one paragraph.
+   \everypar = {\hang}%
+   \textindent{\thisfootno}%
+   %
+   % Don't crash into the line above the footnote text.  Since this
+   % expands into a box, it must come within the paragraph, lest it
+   % provide a place where TeX can split the footnote.
+   \footstrut
+   %
+   % Invoke rest of plain TeX footnote routine.
+   \futurelet\next\fo@t
+ }
+ }%end \catcode `\@=11
+ 
+ % In case a @footnote appears in a vbox, save the footnote text and create
+ % the real \insert just after the vbox finished.  Otherwise, the insertion
+ % would be lost.
+ % Similarly, if a @footnote appears inside an alignment, save the footnote
+ % text to a box and make the \insert when a row of the table is finished.
+ % And the same can be done for other insert classes.  --kasal, 16nov03.
+ 
+ % Replace the \insert primitive by a cheating macro.
+ % Deeper inside, just make sure that the saved insertions are not spilled
+ % out prematurely.
+ %
+ \def\startsavinginserts{%
+   \ifx \insert\ptexinsert
+     \let\insert\saveinsert
+   \else
+     \let\checkinserts\relax
+   \fi
+ }
+ 
+ % This \insert replacement works for both \insert\footins{foo} and
+ % \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
+ %
+ \def\saveinsert#1{%
+   \edef\next{\noexpand\savetobox \makeSAVEname#1}%
+   \afterassignment\next
+   % swallow the left brace
+   \let\temp =
+ }
+ \def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
+ \def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
+ 
+ \def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
+ 
+ \def\placesaveins#1{%
+   \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
+     {\box#1}%
+ }
+ 
+ % eat @SAVE -- beware, all of them have catcode \other:
+ {
+   \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials  %  ;-)
+   \gdef\gobblesave @SAVE{}
+ }
+ 
+ % initialization:
+ \def\newsaveins #1{%
+   \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
+   \next
+ }
+ \def\newsaveinsX #1{%
+   \csname newbox\endcsname #1%
+   \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
+     \checksaveins #1}%
+ }
+ 
+ % initialize:
+ \let\checkinserts\empty
+ \newsaveins\footins
+ \newsaveins\margin
+ 
+ 
+ % @image.  We use the macros from epsf.tex to support this.
+ % If epsf.tex is not installed and @image is used, we complain.
+ %
+ % Check for and read epsf.tex up front.  If we read it only at @image
+ % time, we might be inside a group, and then its definitions would get
+ % undone and the next image would fail.
+ \openin 1 = epsf.tex
+ \ifeof 1 \else
+   % Do not bother showing banner with epsf.tex v2.7k (available in
+   % doc/epsf.tex and on ctan).
+   \def\epsfannounce{\toks0 = }%
+   \input epsf.tex
+ \fi
+ \closein 1
+ %
+ % We will only complain once about lack of epsf.tex.
+ \newif\ifwarnednoepsf
+ \newhelp\noepsfhelp{epsf.tex must be installed for images to
+   work.  It is also included in the Texinfo distribution, or you can get
+   it from ftp://tug.org/tex/epsf.tex.}
+ %
+ \def\image#1{%
+   \ifx\epsfbox\thisisundefined
+     \ifwarnednoepsf \else
+       \errhelp = \noepsfhelp
+       \errmessage{epsf.tex not found, images will be ignored}%
+       \global\warnednoepsftrue
+     \fi
+   \else
+     \imagexxx #1,,,,,\finish
+   \fi
+ }
+ %
+ % Arguments to @image:
+ % #1 is (mandatory) image filename; we tack on .eps extension.
+ % #2 is (optional) width, #3 is (optional) height.
+ % #4 is (ignored optional) html alt text.
+ % #5 is (ignored optional) extension.
+ % #6 is just the usual extra ignored arg for parsing stuff.
+ \newif\ifimagevmode
+ \def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
+   \catcode`\^^M = 5     % in case we're inside an example
+   \normalturnoffactive  % allow _ et al. in names
+   % If the image is by itself, center it.
+   \ifvmode
+     \imagevmodetrue
+   \else \ifx\centersub\centerV
+     % for @center @image, we need a vbox so we can have our vertical space
+     \imagevmodetrue
+     \vbox\bgroup % vbox has better behavior than vtop herev
+   \fi\fi
+   %
+   \ifimagevmode
+     \nobreak\medskip
+     % Usually we'll have text after the image which will insert
+     % \parskip glue, so insert it here too to equalize the space
+     % above and below.
+     \nobreak\vskip\parskip
+     \nobreak
+   \fi
+   %
+   % Leave vertical mode so that indentation from an enclosing
+   %  environment such as @quotation is respected.
+   % However, if we're at the top level, we don't want the
+   %  normal paragraph indentation.
+   % On the other hand, if we are in the case of @center @image, we don't
+   %  want to start a paragraph, which will create a hsize-width box and
+   %  eradicate the centering.
+   \ifx\centersub\centerV\else \noindent \fi
+   %
+   % Output the image.
+   \ifpdf
+     \dopdfimage{#1}{#2}{#3}%
+   \else
+     % \epsfbox itself resets \epsf?size at each figure.
+     \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
+     \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
+     \epsfbox{#1.eps}%
+   \fi
+   %
+   \ifimagevmode
+     \medskip  % space after a standalone image
+   \fi  
+   \ifx\centersub\centerV \egroup \fi
+ \endgroup}
+ 
+ 
+ % @float FLOATTYPE,LABEL,LOC ... @end float for displayed figures, tables,
+ % etc.  We don't actually implement floating yet, we always include the
+ % float "here".  But it seemed the best name for the future.
+ %
+ \envparseargdef\float{\eatcommaspace\eatcommaspace\dofloat#1, , ,\finish}
+ 
+ % There may be a space before second and/or third parameter; delete it.
+ \def\eatcommaspace#1, {#1,}
+ 
+ % #1 is the optional FLOATTYPE, the text label for this float, typically
+ % "Figure", "Table", "Example", etc.  Can't contain commas.  If omitted,
+ % this float will not be numbered and cannot be referred to.
+ %
+ % #2 is the optional xref label.  Also must be present for the float to
+ % be referable.
+ %
+ % #3 is the optional positioning argument; for now, it is ignored.  It
+ % will somehow specify the positions allowed to float to (here, top, bottom).
+ %
+ % We keep a separate counter for each FLOATTYPE, which we reset at each
+ % chapter-level command.
+ \let\resetallfloatnos=\empty
+ %
+ \def\dofloat#1,#2,#3,#4\finish{%
+   \let\thiscaption=\empty
+   \let\thisshortcaption=\empty
+   %
+   % don't lose footnotes inside @float.
+   %
+   % BEWARE: when the floats start float, we have to issue warning whenever an
+   % insert appears inside a float which could possibly float. --kasal, 26may04
+   %
+   \startsavinginserts
+   %
+   % We can't be used inside a paragraph.
+   \par
+   %
+   \vtop\bgroup
+     \def\floattype{#1}%
+     \def\floatlabel{#2}%
+     \def\floatloc{#3}% we do nothing with this yet.
+     %
+     \ifx\floattype\empty
+       \let\safefloattype=\empty
+     \else
+       {%
+         % the floattype might have accents or other special characters,
+         % but we need to use it in a control sequence name.
+         \indexnofonts
+         \turnoffactive
+         \xdef\safefloattype{\floattype}%
+       }%
+     \fi
+     %
+     % If label is given but no type, we handle that as the empty type.
+     \ifx\floatlabel\empty \else
+       % We want each FLOATTYPE to be numbered separately (Figure 1,
+       % Table 1, Figure 2, ...).  (And if no label, no number.)
+       %
+       \expandafter\getfloatno\csname\safefloattype floatno\endcsname
+       \global\advance\floatno by 1
+       %
+       {%
+         % This magic value for \lastsection is output by \setref as the
+         % XREFLABEL-title value.  \xrefX uses it to distinguish float
+         % labels (which have a completely different output format) from
+         % node and anchor labels.  And \xrdef uses it to construct the
+         % lists of floats.
+         %
+         \edef\lastsection{\floatmagic=\safefloattype}%
+         \setref{\floatlabel}{Yfloat}%
+       }%
+     \fi
+     %
+     % start with \parskip glue, I guess.
+     \vskip\parskip
+     %
+     % Don't suppress indentation if a float happens to start a section.
+     \restorefirstparagraphindent
+ }
+ 
+ % we have these possibilities:
+ % @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
+ % @float Foo,lbl & no caption:    Foo 1.1
+ % @float Foo & @caption{Cap}:     Foo: Cap
+ % @float Foo & no caption:        Foo
+ % @float ,lbl & Caption{Cap}:     1.1: Cap
+ % @float ,lbl & no caption:       1.1
+ % @float & @caption{Cap}:         Cap
+ % @float & no caption:
+ %
+ \def\Efloat{%
+     \let\floatident = \empty
+     %
+     % In all cases, if we have a float type, it comes first.
+     \ifx\floattype\empty \else \def\floatident{\floattype}\fi
+     %
+     % If we have an xref label, the number comes next.
+     \ifx\floatlabel\empty \else
+       \ifx\floattype\empty \else % if also had float type, need tie first.
+         \appendtomacro\floatident{\tie}%
+       \fi
+       % the number.
+       \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
+     \fi
+     %
+     % Start the printed caption with what we've constructed in
+     % \floatident, but keep it separate; we need \floatident again.
+     \let\captionline = \floatident
+     %
+     \ifx\thiscaption\empty \else
+       \ifx\floatident\empty \else
+ 	\appendtomacro\captionline{: }% had ident, so need a colon between
+       \fi
+       %
+       % caption text.
+       \appendtomacro\captionline{\scanexp\thiscaption}%
+     \fi
+     %
+     % If we have anything to print, print it, with space before.
+     % Eventually this needs to become an \insert.
+     \ifx\captionline\empty \else
+       \vskip.5\parskip
+       \captionline
+       %
+       % Space below caption.
+       \vskip\parskip
+     \fi
+     %
+     % If have an xref label, write the list of floats info.  Do this
+     % after the caption, to avoid chance of it being a breakpoint.
+     \ifx\floatlabel\empty \else
+       % Write the text that goes in the lof to the aux file as
+       % \floatlabel-lof.  Besides \floatident, we include the short
+       % caption if specified, else the full caption if specified, else nothing.
+       {%
+         \atdummies
+         %
+         % since we read the caption text in the macro world, where ^^M
+         % is turned into a normal character, we have to scan it back, so
+         % we don't write the literal three characters "^^M" into the aux file.
+ 	\scanexp{%
+ 	  \xdef\noexpand\gtemp{%
+ 	    \ifx\thisshortcaption\empty
+ 	      \thiscaption
+ 	    \else
+ 	      \thisshortcaption
+ 	    \fi
+ 	  }%
+ 	}%
+         \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
+ 	  \ifx\gtemp\empty \else : \gtemp \fi}}%
+       }%
+     \fi
+   \egroup  % end of \vtop
+   %
+   % place the captured inserts
+   %
+   % BEWARE: when the floats start floating, we have to issue warning
+   % whenever an insert appears inside a float which could possibly
+   % float. --kasal, 26may04
+   %
+   \checkinserts
+ }
+ 
+ % Append the tokens #2 to the definition of macro #1, not expanding either.
+ %
+ \def\appendtomacro#1#2{%
+   \expandafter\def\expandafter#1\expandafter{#1#2}%
+ }
+ 
+ % @caption, @shortcaption
+ %
+ \def\caption{\docaption\thiscaption}
+ \def\shortcaption{\docaption\thisshortcaption}
+ \def\docaption{\checkenv\float \bgroup\scanargctxt\defcaption}
+ \def\defcaption#1#2{\egroup \def#1{#2}}
+ 
+ % The parameter is the control sequence identifying the counter we are
+ % going to use.  Create it if it doesn't exist and assign it to \floatno.
+ \def\getfloatno#1{%
+   \ifx#1\relax
+       % Haven't seen this figure type before.
+       \csname newcount\endcsname #1%
+       %
+       % Remember to reset this floatno at the next chap.
+       \expandafter\gdef\expandafter\resetallfloatnos
+         \expandafter{\resetallfloatnos #1=0 }%
+   \fi
+   \let\floatno#1%
+ }
+ 
+ % \setref calls this to get the XREFLABEL-snt value.  We want an @xref
+ % to the FLOATLABEL to expand to "Figure 3.1".  We call \setref when we
+ % first read the @float command.
+ %
+ \def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
+ 
+ % Magic string used for the XREFLABEL-title value, so \xrefX can
+ % distinguish floats from other xref types.
+ \def\floatmagic{!!float!!}
+ 
+ % #1 is the control sequence we are passed; we expand into a conditional
+ % which is true if #1 represents a float ref.  That is, the magic
+ % \lastsection value which we \setref above.
+ %
+ \def\iffloat#1{\expandafter\doiffloat#1==\finish}
+ %
+ % #1 is (maybe) the \floatmagic string.  If so, #2 will be the
+ % (safe) float type for this float.  We set \iffloattype to #2.
+ %
+ \def\doiffloat#1=#2=#3\finish{%
+   \def\temp{#1}%
+   \def\iffloattype{#2}%
+   \ifx\temp\floatmagic
+ }
+ 
+ % @listoffloats FLOATTYPE - print a list of floats like a table of contents.
+ %
+ \parseargdef\listoffloats{%
+   \def\floattype{#1}% floattype
+   {%
+     % the floattype might have accents or other special characters,
+     % but we need to use it in a control sequence name.
+     \indexnofonts
+     \turnoffactive
+     \xdef\safefloattype{\floattype}%
+   }%
+   %
+   % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
+   \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
+     \ifhavexrefs
+       % if the user said @listoffloats foo but never @float foo.
+       \message{\linenumber No `\safefloattype' floats to list.}%
+     \fi
+   \else
+     \begingroup
+       \leftskip=\tocindent  % indent these entries like a toc
+       \let\do=\listoffloatsdo
+       \csname floatlist\safefloattype\endcsname
+     \endgroup
+   \fi
+ }
+ 
+ % This is called on each entry in a list of floats.  We're passed the
+ % xref label, in the form LABEL-title, which is how we save it in the
+ % aux file.  We strip off the -title and look up \XRLABEL-lof, which
+ % has the text we're supposed to typeset here.
+ %
+ % Figures without xref labels will not be included in the list (since
+ % they won't appear in the aux file).
+ %
+ \def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
+ \def\listoffloatsdoentry#1-title\finish{{%
+   % Can't fully expand XR#1-lof because it can contain anything.  Just
+   % pass the control sequence.  On the other hand, XR#1-pg is just the
+   % page number, and we want to fully expand that so we can get a link
+   % in pdf output.
+   \toksA = \expandafter{\csname XR#1-lof\endcsname}%
+   %
+   % use the same \entry macro we use to generate the TOC and index.
+   \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
+   \writeentry
+ }}
+ 
+ 
+ \message{localization,}
+ 
+ % For single-language documents, @documentlanguage is usually given very
+ % early, just after @documentencoding.  Single argument is the language
+ % (de) or locale (de_DE) abbreviation.
+ %
+ {
+   \catcode`\_ = \active
+   \globaldefs=1
+ \parseargdef\documentlanguage{\begingroup
+   \let_=\normalunderscore  % normal _ character for filenames
+   \tex % read txi-??.tex file in plain TeX.
+     % Read the file by the name they passed if it exists.
+     \openin 1 txi-#1.tex
+     \ifeof 1
+       \documentlanguagetrywithoutunderscore{#1_\finish}%
+     \else
+       \globaldefs = 1  % everything in the txi-LL files needs to persist
+       \input txi-#1.tex
+     \fi
+     \closein 1
+   \endgroup % end raw TeX
+ \endgroup}
+ %
+ % If they passed de_DE, and txi-de_DE.tex doesn't exist,
+ % try txi-de.tex.
+ %
+ \gdef\documentlanguagetrywithoutunderscore#1_#2\finish{%
+   \openin 1 txi-#1.tex
+   \ifeof 1
+     \errhelp = \nolanghelp
+     \errmessage{Cannot read language file txi-#1.tex}%
+   \else
+     \globaldefs = 1  % everything in the txi-LL files needs to persist
+     \input txi-#1.tex
+   \fi
+   \closein 1
+ }
+ }% end of special _ catcode
+ %
+ \newhelp\nolanghelp{The given language definition file cannot be found or
+ is empty.  Maybe you need to install it?  Putting it in the current
+ directory should work if nowhere else does.}
+ 
+ % This macro is called from txi-??.tex files; the first argument is the
+ % \language name to set (without the "\lang@" prefix), the second and
+ % third args are \{left,right}hyphenmin.
+ %
+ % The language names to pass are determined when the format is built.
+ % See the etex.log file created at that time, e.g.,
+ % /usr/local/texlive/2008/texmf-var/web2c/pdftex/etex.log.
+ %
+ % With TeX Live 2008, etex now includes hyphenation patterns for all
+ % available languages.  This means we can support hyphenation in
+ % Texinfo, at least to some extent.  (This still doesn't solve the
+ % accented characters problem.)
+ %
+ \catcode`@=11
+ \def\txisetlanguage#1#2#3{%
+   % do not set the language if the name is undefined in the current TeX.
+   \expandafter\ifx\csname lang@#1\endcsname \relax
+     \message{no patterns for #1}%
+   \else
+     \global\language = \csname lang@#1\endcsname
+   \fi
+   % but there is no harm in adjusting the hyphenmin values regardless.
+   \global\lefthyphenmin = #2\relax
+   \global\righthyphenmin = #3\relax
+ }
+ 
+ % Helpers for encodings.
+ % Set the catcode of characters 128 through 255 to the specified number.
+ %
+ \def\setnonasciicharscatcode#1{%
+    \count255=128
+    \loop\ifnum\count255<256
+       \global\catcode\count255=#1\relax
+       \advance\count255 by 1
+    \repeat
+ }
+ 
+ \def\setnonasciicharscatcodenonglobal#1{%
+    \count255=128
+    \loop\ifnum\count255<256
+       \catcode\count255=#1\relax
+       \advance\count255 by 1
+    \repeat
+ }
+ 
+ % @documentencoding sets the definition of non-ASCII characters
+ % according to the specified encoding.
+ %
+ \parseargdef\documentencoding{%
+   % Encoding being declared for the document.
+   \def\declaredencoding{\csname #1.enc\endcsname}%
+   %
+   % Supported encodings: names converted to tokens in order to be able
+   % to compare them with \ifx.
+   \def\ascii{\csname US-ASCII.enc\endcsname}%
+   \def\latnine{\csname ISO-8859-15.enc\endcsname}%
+   \def\latone{\csname ISO-8859-1.enc\endcsname}%
+   \def\lattwo{\csname ISO-8859-2.enc\endcsname}%
+   \def\utfeight{\csname UTF-8.enc\endcsname}%
+   %
+   \ifx \declaredencoding \ascii
+      \asciichardefs
+   %
+   \else \ifx \declaredencoding \lattwo
+      \setnonasciicharscatcode\active
+      \lattwochardefs
+   %
+   \else \ifx \declaredencoding \latone
+      \setnonasciicharscatcode\active
+      \latonechardefs
+   %
+   \else \ifx \declaredencoding \latnine
+      \setnonasciicharscatcode\active
+      \latninechardefs
+   %
+   \else \ifx \declaredencoding \utfeight
+      \setnonasciicharscatcode\active
+      \utfeightchardefs
+   %
+   \else
+     \message{Unknown document encoding #1, ignoring.}%
+   %
+   \fi % utfeight
+   \fi % latnine
+   \fi % latone
+   \fi % lattwo
+   \fi % ascii
+ }
+ 
+ % A message to be logged when using a character that isn't available
+ % the default font encoding (OT1).
+ %
+ \def\missingcharmsg#1{\message{Character missing in OT1 encoding: #1.}}
+ 
+ % Take account of \c (plain) vs. \, (Texinfo) difference.
+ \def\cedilla#1{\ifx\c\ptexc\c{#1}\else\,{#1}\fi}
+ 
+ % First, make active non-ASCII characters in order for them to be
+ % correctly categorized when TeX reads the replacement text of
+ % macros containing the character definitions.
+ \setnonasciicharscatcode\active
+ %
+ % Latin1 (ISO-8859-1) character definitions.
+ \def\latonechardefs{%
+   \gdef^^a0{\tie}
+   \gdef^^a1{\exclamdown}
+   \gdef^^a2{\missingcharmsg{CENT SIGN}}
+   \gdef^^a3{{\pounds}}
+   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
+   \gdef^^a5{\missingcharmsg{YEN SIGN}}
+   \gdef^^a6{\missingcharmsg{BROKEN BAR}}
+   \gdef^^a7{\S}
+   \gdef^^a8{\"{}}
+   \gdef^^a9{\copyright}
+   \gdef^^aa{\ordf}
+   \gdef^^ab{\guillemetleft}
+   \gdef^^ac{$\lnot$}
+   \gdef^^ad{\-}
+   \gdef^^ae{\registeredsymbol}
+   \gdef^^af{\={}}
+   %
+   \gdef^^b0{\textdegree}
+   \gdef^^b1{$\pm$}
+   \gdef^^b2{$^2$}
+   \gdef^^b3{$^3$}
+   \gdef^^b4{\'{}}
+   \gdef^^b5{$\mu$}
+   \gdef^^b6{\P}
+   %
+   \gdef^^b7{$^.$}
+   \gdef^^b8{\cedilla\ }
+   \gdef^^b9{$^1$}
+   \gdef^^ba{\ordm}
+   %
+   \gdef^^bb{\guillemetright}
+   \gdef^^bc{$1\over4$}
+   \gdef^^bd{$1\over2$}
+   \gdef^^be{$3\over4$}
+   \gdef^^bf{\questiondown}
+   %
+   \gdef^^c0{\`A}
+   \gdef^^c1{\'A}
+   \gdef^^c2{\^A}
+   \gdef^^c3{\~A}
+   \gdef^^c4{\"A}
+   \gdef^^c5{\ringaccent A}
+   \gdef^^c6{\AE}
+   \gdef^^c7{\cedilla C}
+   \gdef^^c8{\`E}
+   \gdef^^c9{\'E}
+   \gdef^^ca{\^E}
+   \gdef^^cb{\"E}
+   \gdef^^cc{\`I}
+   \gdef^^cd{\'I}
+   \gdef^^ce{\^I}
+   \gdef^^cf{\"I}
+   %
+   \gdef^^d0{\DH}
+   \gdef^^d1{\~N}
+   \gdef^^d2{\`O}
+   \gdef^^d3{\'O}
+   \gdef^^d4{\^O}
+   \gdef^^d5{\~O}
+   \gdef^^d6{\"O}
+   \gdef^^d7{$\times$}
+   \gdef^^d8{\O}
+   \gdef^^d9{\`U}
+   \gdef^^da{\'U}
+   \gdef^^db{\^U}
+   \gdef^^dc{\"U}
+   \gdef^^dd{\'Y}
+   \gdef^^de{\TH}
+   \gdef^^df{\ss}
+   %
+   \gdef^^e0{\`a}
+   \gdef^^e1{\'a}
+   \gdef^^e2{\^a}
+   \gdef^^e3{\~a}
+   \gdef^^e4{\"a}
+   \gdef^^e5{\ringaccent a}
+   \gdef^^e6{\ae}
+   \gdef^^e7{\cedilla c}
+   \gdef^^e8{\`e}
+   \gdef^^e9{\'e}
+   \gdef^^ea{\^e}
+   \gdef^^eb{\"e}
+   \gdef^^ec{\`{\dotless i}}
+   \gdef^^ed{\'{\dotless i}}
+   \gdef^^ee{\^{\dotless i}}
+   \gdef^^ef{\"{\dotless i}}
+   %
+   \gdef^^f0{\dh}
+   \gdef^^f1{\~n}
+   \gdef^^f2{\`o}
+   \gdef^^f3{\'o}
+   \gdef^^f4{\^o}
+   \gdef^^f5{\~o}
+   \gdef^^f6{\"o}
+   \gdef^^f7{$\div$}
+   \gdef^^f8{\o}
+   \gdef^^f9{\`u}
+   \gdef^^fa{\'u}
+   \gdef^^fb{\^u}
+   \gdef^^fc{\"u}
+   \gdef^^fd{\'y}
+   \gdef^^fe{\th}
+   \gdef^^ff{\"y}
+ }
+ 
+ % Latin9 (ISO-8859-15) encoding character definitions.
+ \def\latninechardefs{%
+   % Encoding is almost identical to Latin1.
+   \latonechardefs
+   %
+   \gdef^^a4{\euro}
+   \gdef^^a6{\v S}
+   \gdef^^a8{\v s}
+   \gdef^^b4{\v Z}
+   \gdef^^b8{\v z}
+   \gdef^^bc{\OE}
+   \gdef^^bd{\oe}
+   \gdef^^be{\"Y}
+ }
+ 
+ % Latin2 (ISO-8859-2) character definitions.
+ \def\lattwochardefs{%
+   \gdef^^a0{\tie}
+   \gdef^^a1{\ogonek{A}}
+   \gdef^^a2{\u{}}
+   \gdef^^a3{\L}
+   \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
+   \gdef^^a5{\v L}
+   \gdef^^a6{\'S}
+   \gdef^^a7{\S}
+   \gdef^^a8{\"{}}
+   \gdef^^a9{\v S}
+   \gdef^^aa{\cedilla S}
+   \gdef^^ab{\v T}
+   \gdef^^ac{\'Z}
+   \gdef^^ad{\-}
+   \gdef^^ae{\v Z}
+   \gdef^^af{\dotaccent Z}
+   %
+   \gdef^^b0{\textdegree}
+   \gdef^^b1{\ogonek{a}}
+   \gdef^^b2{\ogonek{ }}
+   \gdef^^b3{\l}
+   \gdef^^b4{\'{}}
+   \gdef^^b5{\v l}
+   \gdef^^b6{\'s}
+   \gdef^^b7{\v{}}
+   \gdef^^b8{\cedilla\ }
+   \gdef^^b9{\v s}
+   \gdef^^ba{\cedilla s}
+   \gdef^^bb{\v t}
+   \gdef^^bc{\'z}
+   \gdef^^bd{\H{}}
+   \gdef^^be{\v z}
+   \gdef^^bf{\dotaccent z}
+   %
+   \gdef^^c0{\'R}
+   \gdef^^c1{\'A}
+   \gdef^^c2{\^A}
+   \gdef^^c3{\u A}
+   \gdef^^c4{\"A}
+   \gdef^^c5{\'L}
+   \gdef^^c6{\'C}
+   \gdef^^c7{\cedilla C}
+   \gdef^^c8{\v C}
+   \gdef^^c9{\'E}
+   \gdef^^ca{\ogonek{E}}
+   \gdef^^cb{\"E}
+   \gdef^^cc{\v E}
+   \gdef^^cd{\'I}
+   \gdef^^ce{\^I}
+   \gdef^^cf{\v D}
+   %
+   \gdef^^d0{\DH}
+   \gdef^^d1{\'N}
+   \gdef^^d2{\v N}
+   \gdef^^d3{\'O}
+   \gdef^^d4{\^O}
+   \gdef^^d5{\H O}
+   \gdef^^d6{\"O}
+   \gdef^^d7{$\times$}
+   \gdef^^d8{\v R}
+   \gdef^^d9{\ringaccent U}
+   \gdef^^da{\'U}
+   \gdef^^db{\H U}
+   \gdef^^dc{\"U}
+   \gdef^^dd{\'Y}
+   \gdef^^de{\cedilla T}
+   \gdef^^df{\ss}
+   %
+   \gdef^^e0{\'r}
+   \gdef^^e1{\'a}
+   \gdef^^e2{\^a}
+   \gdef^^e3{\u a}
+   \gdef^^e4{\"a}
+   \gdef^^e5{\'l}
+   \gdef^^e6{\'c}
+   \gdef^^e7{\cedilla c}
+   \gdef^^e8{\v c}
+   \gdef^^e9{\'e}
+   \gdef^^ea{\ogonek{e}}
+   \gdef^^eb{\"e}
+   \gdef^^ec{\v e}
+   \gdef^^ed{\'{\dotless{i}}}
+   \gdef^^ee{\^{\dotless{i}}}
+   \gdef^^ef{\v d}
+   %
+   \gdef^^f0{\dh}
+   \gdef^^f1{\'n}
+   \gdef^^f2{\v n}
+   \gdef^^f3{\'o}
+   \gdef^^f4{\^o}
+   \gdef^^f5{\H o}
+   \gdef^^f6{\"o}
+   \gdef^^f7{$\div$}
+   \gdef^^f8{\v r}
+   \gdef^^f9{\ringaccent u}
+   \gdef^^fa{\'u}
+   \gdef^^fb{\H u}
+   \gdef^^fc{\"u}
+   \gdef^^fd{\'y}
+   \gdef^^fe{\cedilla t}
+   \gdef^^ff{\dotaccent{}}
+ }
+ 
+ % UTF-8 character definitions.
+ %
+ % This code to support UTF-8 is based on LaTeX's utf8.def, with some
+ % changes for Texinfo conventions.  It is included here under the GPL by
+ % permission from Frank Mittelbach and the LaTeX team.
+ %
+ \newcount\countUTFx
+ \newcount\countUTFy
+ \newcount\countUTFz
+ 
+ \gdef\UTFviiiTwoOctets#1#2{\expandafter
+    \UTFviiiDefined\csname u8:#1\string #2\endcsname}
+ %
+ \gdef\UTFviiiThreeOctets#1#2#3{\expandafter
+    \UTFviiiDefined\csname u8:#1\string #2\string #3\endcsname}
+ %
+ \gdef\UTFviiiFourOctets#1#2#3#4{\expandafter
+    \UTFviiiDefined\csname u8:#1\string #2\string #3\string #4\endcsname}
+ 
+ \gdef\UTFviiiDefined#1{%
+   \ifx #1\relax
+     \message{\linenumber Unicode char \string #1 not defined for Texinfo}%
+   \else
+     \expandafter #1%
+   \fi
+ }
+ 
+ \begingroup
+   \catcode`\~13
+   \catcode`\"12
+ 
+   \def\UTFviiiLoop{%
+     \global\catcode\countUTFx\active
+     \uccode`\~\countUTFx
+     \uppercase\expandafter{\UTFviiiTmp}%
+     \advance\countUTFx by 1
+     \ifnum\countUTFx < \countUTFy
+       \expandafter\UTFviiiLoop
+     \fi}
+ 
+   \countUTFx = "C2
+   \countUTFy = "E0
+   \def\UTFviiiTmp{%
+     \xdef~{\noexpand\UTFviiiTwoOctets\string~}}
+   \UTFviiiLoop
+ 
+   \countUTFx = "E0
+   \countUTFy = "F0
+   \def\UTFviiiTmp{%
+     \xdef~{\noexpand\UTFviiiThreeOctets\string~}}
+   \UTFviiiLoop
+ 
+   \countUTFx = "F0
+   \countUTFy = "F4
+   \def\UTFviiiTmp{%
+     \xdef~{\noexpand\UTFviiiFourOctets\string~}}
+   \UTFviiiLoop
+ \endgroup
+ 
+ \begingroup
+   \catcode`\"=12
+   \catcode`\<=12
+   \catcode`\.=12
+   \catcode`\,=12
+   \catcode`\;=12
+   \catcode`\!=12
+   \catcode`\~=13
+ 
+   \gdef\DeclareUnicodeCharacter#1#2{%
+     \countUTFz = "#1\relax
+     %\wlog{\space\space defining Unicode char U+#1 (decimal \the\countUTFz)}%
+     \begingroup
+       \parseXMLCharref
+       \def\UTFviiiTwoOctets##1##2{%
+         \csname u8:##1\string ##2\endcsname}%
+       \def\UTFviiiThreeOctets##1##2##3{%
+         \csname u8:##1\string ##2\string ##3\endcsname}%
+       \def\UTFviiiFourOctets##1##2##3##4{%
+         \csname u8:##1\string ##2\string ##3\string ##4\endcsname}%
+       \expandafter\expandafter\expandafter\expandafter
+        \expandafter\expandafter\expandafter
+        \gdef\UTFviiiTmp{#2}%
+     \endgroup}
+ 
+   \gdef\parseXMLCharref{%
+     \ifnum\countUTFz < "A0\relax
+       \errhelp = \EMsimple
+       \errmessage{Cannot define Unicode char value < 00A0}%
+     \else\ifnum\countUTFz < "800\relax
+       \parseUTFviiiA,%
+       \parseUTFviiiB C\UTFviiiTwoOctets.,%
+     \else\ifnum\countUTFz < "10000\relax
+       \parseUTFviiiA;%
+       \parseUTFviiiA,%
+       \parseUTFviiiB E\UTFviiiThreeOctets.{,;}%
+     \else
+       \parseUTFviiiA;%
+       \parseUTFviiiA,%
+       \parseUTFviiiA!%
+       \parseUTFviiiB F\UTFviiiFourOctets.{!,;}%
+     \fi\fi\fi
+   }
+ 
+   \gdef\parseUTFviiiA#1{%
+     \countUTFx = \countUTFz
+     \divide\countUTFz by 64
+     \countUTFy = \countUTFz
+     \multiply\countUTFz by 64
+     \advance\countUTFx by -\countUTFz
+     \advance\countUTFx by 128
+     \uccode `#1\countUTFx
+     \countUTFz = \countUTFy}
+ 
+   \gdef\parseUTFviiiB#1#2#3#4{%
+     \advance\countUTFz by "#10\relax
+     \uccode `#3\countUTFz
+     \uppercase{\gdef\UTFviiiTmp{#2#3#4}}}
+ \endgroup
+ 
+ \def\utfeightchardefs{%
+   \DeclareUnicodeCharacter{00A0}{\tie}
+   \DeclareUnicodeCharacter{00A1}{\exclamdown}
+   \DeclareUnicodeCharacter{00A3}{\pounds}
+   \DeclareUnicodeCharacter{00A8}{\"{ }}
+   \DeclareUnicodeCharacter{00A9}{\copyright}
+   \DeclareUnicodeCharacter{00AA}{\ordf}
+   \DeclareUnicodeCharacter{00AB}{\guillemetleft}
+   \DeclareUnicodeCharacter{00AD}{\-}
+   \DeclareUnicodeCharacter{00AE}{\registeredsymbol}
+   \DeclareUnicodeCharacter{00AF}{\={ }}
+ 
+   \DeclareUnicodeCharacter{00B0}{\ringaccent{ }}
+   \DeclareUnicodeCharacter{00B4}{\'{ }}
+   \DeclareUnicodeCharacter{00B8}{\cedilla{ }}
+   \DeclareUnicodeCharacter{00BA}{\ordm}
+   \DeclareUnicodeCharacter{00BB}{\guillemetright}
+   \DeclareUnicodeCharacter{00BF}{\questiondown}
+ 
+   \DeclareUnicodeCharacter{00C0}{\`A}
+   \DeclareUnicodeCharacter{00C1}{\'A}
+   \DeclareUnicodeCharacter{00C2}{\^A}
+   \DeclareUnicodeCharacter{00C3}{\~A}
+   \DeclareUnicodeCharacter{00C4}{\"A}
+   \DeclareUnicodeCharacter{00C5}{\AA}
+   \DeclareUnicodeCharacter{00C6}{\AE}
+   \DeclareUnicodeCharacter{00C7}{\cedilla{C}}
+   \DeclareUnicodeCharacter{00C8}{\`E}
+   \DeclareUnicodeCharacter{00C9}{\'E}
+   \DeclareUnicodeCharacter{00CA}{\^E}
+   \DeclareUnicodeCharacter{00CB}{\"E}
+   \DeclareUnicodeCharacter{00CC}{\`I}
+   \DeclareUnicodeCharacter{00CD}{\'I}
+   \DeclareUnicodeCharacter{00CE}{\^I}
+   \DeclareUnicodeCharacter{00CF}{\"I}
+ 
+   \DeclareUnicodeCharacter{00D0}{\DH}
+   \DeclareUnicodeCharacter{00D1}{\~N}
+   \DeclareUnicodeCharacter{00D2}{\`O}
+   \DeclareUnicodeCharacter{00D3}{\'O}
+   \DeclareUnicodeCharacter{00D4}{\^O}
+   \DeclareUnicodeCharacter{00D5}{\~O}
+   \DeclareUnicodeCharacter{00D6}{\"O}
+   \DeclareUnicodeCharacter{00D8}{\O}
+   \DeclareUnicodeCharacter{00D9}{\`U}
+   \DeclareUnicodeCharacter{00DA}{\'U}
+   \DeclareUnicodeCharacter{00DB}{\^U}
+   \DeclareUnicodeCharacter{00DC}{\"U}
+   \DeclareUnicodeCharacter{00DD}{\'Y}
+   \DeclareUnicodeCharacter{00DE}{\TH}
+   \DeclareUnicodeCharacter{00DF}{\ss}
+ 
+   \DeclareUnicodeCharacter{00E0}{\`a}
+   \DeclareUnicodeCharacter{00E1}{\'a}
+   \DeclareUnicodeCharacter{00E2}{\^a}
+   \DeclareUnicodeCharacter{00E3}{\~a}
+   \DeclareUnicodeCharacter{00E4}{\"a}
+   \DeclareUnicodeCharacter{00E5}{\aa}
+   \DeclareUnicodeCharacter{00E6}{\ae}
+   \DeclareUnicodeCharacter{00E7}{\cedilla{c}}
+   \DeclareUnicodeCharacter{00E8}{\`e}
+   \DeclareUnicodeCharacter{00E9}{\'e}
+   \DeclareUnicodeCharacter{00EA}{\^e}
+   \DeclareUnicodeCharacter{00EB}{\"e}
+   \DeclareUnicodeCharacter{00EC}{\`{\dotless{i}}}
+   \DeclareUnicodeCharacter{00ED}{\'{\dotless{i}}}
+   \DeclareUnicodeCharacter{00EE}{\^{\dotless{i}}}
+   \DeclareUnicodeCharacter{00EF}{\"{\dotless{i}}}
+ 
+   \DeclareUnicodeCharacter{00F0}{\dh}
+   \DeclareUnicodeCharacter{00F1}{\~n}
+   \DeclareUnicodeCharacter{00F2}{\`o}
+   \DeclareUnicodeCharacter{00F3}{\'o}
+   \DeclareUnicodeCharacter{00F4}{\^o}
+   \DeclareUnicodeCharacter{00F5}{\~o}
+   \DeclareUnicodeCharacter{00F6}{\"o}
+   \DeclareUnicodeCharacter{00F8}{\o}
+   \DeclareUnicodeCharacter{00F9}{\`u}
+   \DeclareUnicodeCharacter{00FA}{\'u}
+   \DeclareUnicodeCharacter{00FB}{\^u}
+   \DeclareUnicodeCharacter{00FC}{\"u}
+   \DeclareUnicodeCharacter{00FD}{\'y}
+   \DeclareUnicodeCharacter{00FE}{\th}
+   \DeclareUnicodeCharacter{00FF}{\"y}
+ 
+   \DeclareUnicodeCharacter{0100}{\=A}
+   \DeclareUnicodeCharacter{0101}{\=a}
+   \DeclareUnicodeCharacter{0102}{\u{A}}
+   \DeclareUnicodeCharacter{0103}{\u{a}}
+   \DeclareUnicodeCharacter{0104}{\ogonek{A}}
+   \DeclareUnicodeCharacter{0105}{\ogonek{a}}
+   \DeclareUnicodeCharacter{0106}{\'C}
+   \DeclareUnicodeCharacter{0107}{\'c}
+   \DeclareUnicodeCharacter{0108}{\^C}
+   \DeclareUnicodeCharacter{0109}{\^c}
+   \DeclareUnicodeCharacter{0118}{\ogonek{E}}
+   \DeclareUnicodeCharacter{0119}{\ogonek{e}}
+   \DeclareUnicodeCharacter{010A}{\dotaccent{C}}
+   \DeclareUnicodeCharacter{010B}{\dotaccent{c}}
+   \DeclareUnicodeCharacter{010C}{\v{C}}
+   \DeclareUnicodeCharacter{010D}{\v{c}}
+   \DeclareUnicodeCharacter{010E}{\v{D}}
+ 
+   \DeclareUnicodeCharacter{0112}{\=E}
+   \DeclareUnicodeCharacter{0113}{\=e}
+   \DeclareUnicodeCharacter{0114}{\u{E}}
+   \DeclareUnicodeCharacter{0115}{\u{e}}
+   \DeclareUnicodeCharacter{0116}{\dotaccent{E}}
+   \DeclareUnicodeCharacter{0117}{\dotaccent{e}}
+   \DeclareUnicodeCharacter{011A}{\v{E}}
+   \DeclareUnicodeCharacter{011B}{\v{e}}
+   \DeclareUnicodeCharacter{011C}{\^G}
+   \DeclareUnicodeCharacter{011D}{\^g}
+   \DeclareUnicodeCharacter{011E}{\u{G}}
+   \DeclareUnicodeCharacter{011F}{\u{g}}
+ 
+   \DeclareUnicodeCharacter{0120}{\dotaccent{G}}
+   \DeclareUnicodeCharacter{0121}{\dotaccent{g}}
+   \DeclareUnicodeCharacter{0124}{\^H}
+   \DeclareUnicodeCharacter{0125}{\^h}
+   \DeclareUnicodeCharacter{0128}{\~I}
+   \DeclareUnicodeCharacter{0129}{\~{\dotless{i}}}
+   \DeclareUnicodeCharacter{012A}{\=I}
+   \DeclareUnicodeCharacter{012B}{\={\dotless{i}}}
+   \DeclareUnicodeCharacter{012C}{\u{I}}
+   \DeclareUnicodeCharacter{012D}{\u{\dotless{i}}}
+ 
+   \DeclareUnicodeCharacter{0130}{\dotaccent{I}}
+   \DeclareUnicodeCharacter{0131}{\dotless{i}}
+   \DeclareUnicodeCharacter{0132}{IJ}
+   \DeclareUnicodeCharacter{0133}{ij}
+   \DeclareUnicodeCharacter{0134}{\^J}
+   \DeclareUnicodeCharacter{0135}{\^{\dotless{j}}}
+   \DeclareUnicodeCharacter{0139}{\'L}
+   \DeclareUnicodeCharacter{013A}{\'l}
+ 
+   \DeclareUnicodeCharacter{0141}{\L}
+   \DeclareUnicodeCharacter{0142}{\l}
+   \DeclareUnicodeCharacter{0143}{\'N}
+   \DeclareUnicodeCharacter{0144}{\'n}
+   \DeclareUnicodeCharacter{0147}{\v{N}}
+   \DeclareUnicodeCharacter{0148}{\v{n}}
+   \DeclareUnicodeCharacter{014C}{\=O}
+   \DeclareUnicodeCharacter{014D}{\=o}
+   \DeclareUnicodeCharacter{014E}{\u{O}}
+   \DeclareUnicodeCharacter{014F}{\u{o}}
+ 
+   \DeclareUnicodeCharacter{0150}{\H{O}}
+   \DeclareUnicodeCharacter{0151}{\H{o}}
+   \DeclareUnicodeCharacter{0152}{\OE}
+   \DeclareUnicodeCharacter{0153}{\oe}
+   \DeclareUnicodeCharacter{0154}{\'R}
+   \DeclareUnicodeCharacter{0155}{\'r}
+   \DeclareUnicodeCharacter{0158}{\v{R}}
+   \DeclareUnicodeCharacter{0159}{\v{r}}
+   \DeclareUnicodeCharacter{015A}{\'S}
+   \DeclareUnicodeCharacter{015B}{\'s}
+   \DeclareUnicodeCharacter{015C}{\^S}
+   \DeclareUnicodeCharacter{015D}{\^s}
+   \DeclareUnicodeCharacter{015E}{\cedilla{S}}
+   \DeclareUnicodeCharacter{015F}{\cedilla{s}}
+ 
+   \DeclareUnicodeCharacter{0160}{\v{S}}
+   \DeclareUnicodeCharacter{0161}{\v{s}}
+   \DeclareUnicodeCharacter{0162}{\cedilla{t}}
+   \DeclareUnicodeCharacter{0163}{\cedilla{T}}
+   \DeclareUnicodeCharacter{0164}{\v{T}}
+ 
+   \DeclareUnicodeCharacter{0168}{\~U}
+   \DeclareUnicodeCharacter{0169}{\~u}
+   \DeclareUnicodeCharacter{016A}{\=U}
+   \DeclareUnicodeCharacter{016B}{\=u}
+   \DeclareUnicodeCharacter{016C}{\u{U}}
+   \DeclareUnicodeCharacter{016D}{\u{u}}
+   \DeclareUnicodeCharacter{016E}{\ringaccent{U}}
+   \DeclareUnicodeCharacter{016F}{\ringaccent{u}}
+ 
+   \DeclareUnicodeCharacter{0170}{\H{U}}
+   \DeclareUnicodeCharacter{0171}{\H{u}}
+   \DeclareUnicodeCharacter{0174}{\^W}
+   \DeclareUnicodeCharacter{0175}{\^w}
+   \DeclareUnicodeCharacter{0176}{\^Y}
+   \DeclareUnicodeCharacter{0177}{\^y}
+   \DeclareUnicodeCharacter{0178}{\"Y}
+   \DeclareUnicodeCharacter{0179}{\'Z}
+   \DeclareUnicodeCharacter{017A}{\'z}
+   \DeclareUnicodeCharacter{017B}{\dotaccent{Z}}
+   \DeclareUnicodeCharacter{017C}{\dotaccent{z}}
+   \DeclareUnicodeCharacter{017D}{\v{Z}}
+   \DeclareUnicodeCharacter{017E}{\v{z}}
+ 
+   \DeclareUnicodeCharacter{01C4}{D\v{Z}}
+   \DeclareUnicodeCharacter{01C5}{D\v{z}}
+   \DeclareUnicodeCharacter{01C6}{d\v{z}}
+   \DeclareUnicodeCharacter{01C7}{LJ}
+   \DeclareUnicodeCharacter{01C8}{Lj}
+   \DeclareUnicodeCharacter{01C9}{lj}
+   \DeclareUnicodeCharacter{01CA}{NJ}
+   \DeclareUnicodeCharacter{01CB}{Nj}
+   \DeclareUnicodeCharacter{01CC}{nj}
+   \DeclareUnicodeCharacter{01CD}{\v{A}}
+   \DeclareUnicodeCharacter{01CE}{\v{a}}
+   \DeclareUnicodeCharacter{01CF}{\v{I}}
+ 
+   \DeclareUnicodeCharacter{01D0}{\v{\dotless{i}}}
+   \DeclareUnicodeCharacter{01D1}{\v{O}}
+   \DeclareUnicodeCharacter{01D2}{\v{o}}
+   \DeclareUnicodeCharacter{01D3}{\v{U}}
+   \DeclareUnicodeCharacter{01D4}{\v{u}}
+ 
+   \DeclareUnicodeCharacter{01E2}{\={\AE}}
+   \DeclareUnicodeCharacter{01E3}{\={\ae}}
+   \DeclareUnicodeCharacter{01E6}{\v{G}}
+   \DeclareUnicodeCharacter{01E7}{\v{g}}
+   \DeclareUnicodeCharacter{01E8}{\v{K}}
+   \DeclareUnicodeCharacter{01E9}{\v{k}}
+ 
+   \DeclareUnicodeCharacter{01F0}{\v{\dotless{j}}}
+   \DeclareUnicodeCharacter{01F1}{DZ}
+   \DeclareUnicodeCharacter{01F2}{Dz}
+   \DeclareUnicodeCharacter{01F3}{dz}
+   \DeclareUnicodeCharacter{01F4}{\'G}
+   \DeclareUnicodeCharacter{01F5}{\'g}
+   \DeclareUnicodeCharacter{01F8}{\`N}
+   \DeclareUnicodeCharacter{01F9}{\`n}
+   \DeclareUnicodeCharacter{01FC}{\'{\AE}}
+   \DeclareUnicodeCharacter{01FD}{\'{\ae}}
+   \DeclareUnicodeCharacter{01FE}{\'{\O}}
+   \DeclareUnicodeCharacter{01FF}{\'{\o}}
+ 
+   \DeclareUnicodeCharacter{021E}{\v{H}}
+   \DeclareUnicodeCharacter{021F}{\v{h}}
+ 
+   \DeclareUnicodeCharacter{0226}{\dotaccent{A}}
+   \DeclareUnicodeCharacter{0227}{\dotaccent{a}}
+   \DeclareUnicodeCharacter{0228}{\cedilla{E}}
+   \DeclareUnicodeCharacter{0229}{\cedilla{e}}
+   \DeclareUnicodeCharacter{022E}{\dotaccent{O}}
+   \DeclareUnicodeCharacter{022F}{\dotaccent{o}}
+ 
+   \DeclareUnicodeCharacter{0232}{\=Y}
+   \DeclareUnicodeCharacter{0233}{\=y}
+   \DeclareUnicodeCharacter{0237}{\dotless{j}}
+ 
+   \DeclareUnicodeCharacter{02DB}{\ogonek{ }}
+ 
+   \DeclareUnicodeCharacter{1E02}{\dotaccent{B}}
+   \DeclareUnicodeCharacter{1E03}{\dotaccent{b}}
+   \DeclareUnicodeCharacter{1E04}{\udotaccent{B}}
+   \DeclareUnicodeCharacter{1E05}{\udotaccent{b}}
+   \DeclareUnicodeCharacter{1E06}{\ubaraccent{B}}
+   \DeclareUnicodeCharacter{1E07}{\ubaraccent{b}}
+   \DeclareUnicodeCharacter{1E0A}{\dotaccent{D}}
+   \DeclareUnicodeCharacter{1E0B}{\dotaccent{d}}
+   \DeclareUnicodeCharacter{1E0C}{\udotaccent{D}}
+   \DeclareUnicodeCharacter{1E0D}{\udotaccent{d}}
+   \DeclareUnicodeCharacter{1E0E}{\ubaraccent{D}}
+   \DeclareUnicodeCharacter{1E0F}{\ubaraccent{d}}
+ 
+   \DeclareUnicodeCharacter{1E1E}{\dotaccent{F}}
+   \DeclareUnicodeCharacter{1E1F}{\dotaccent{f}}
+ 
+   \DeclareUnicodeCharacter{1E20}{\=G}
+   \DeclareUnicodeCharacter{1E21}{\=g}
+   \DeclareUnicodeCharacter{1E22}{\dotaccent{H}}
+   \DeclareUnicodeCharacter{1E23}{\dotaccent{h}}
+   \DeclareUnicodeCharacter{1E24}{\udotaccent{H}}
+   \DeclareUnicodeCharacter{1E25}{\udotaccent{h}}
+   \DeclareUnicodeCharacter{1E26}{\"H}
+   \DeclareUnicodeCharacter{1E27}{\"h}
+ 
+   \DeclareUnicodeCharacter{1E30}{\'K}
+   \DeclareUnicodeCharacter{1E31}{\'k}
+   \DeclareUnicodeCharacter{1E32}{\udotaccent{K}}
+   \DeclareUnicodeCharacter{1E33}{\udotaccent{k}}
+   \DeclareUnicodeCharacter{1E34}{\ubaraccent{K}}
+   \DeclareUnicodeCharacter{1E35}{\ubaraccent{k}}
+   \DeclareUnicodeCharacter{1E36}{\udotaccent{L}}
+   \DeclareUnicodeCharacter{1E37}{\udotaccent{l}}
+   \DeclareUnicodeCharacter{1E3A}{\ubaraccent{L}}
+   \DeclareUnicodeCharacter{1E3B}{\ubaraccent{l}}
+   \DeclareUnicodeCharacter{1E3E}{\'M}
+   \DeclareUnicodeCharacter{1E3F}{\'m}
+ 
+   \DeclareUnicodeCharacter{1E40}{\dotaccent{M}}
+   \DeclareUnicodeCharacter{1E41}{\dotaccent{m}}
+   \DeclareUnicodeCharacter{1E42}{\udotaccent{M}}
+   \DeclareUnicodeCharacter{1E43}{\udotaccent{m}}
+   \DeclareUnicodeCharacter{1E44}{\dotaccent{N}}
+   \DeclareUnicodeCharacter{1E45}{\dotaccent{n}}
+   \DeclareUnicodeCharacter{1E46}{\udotaccent{N}}
+   \DeclareUnicodeCharacter{1E47}{\udotaccent{n}}
+   \DeclareUnicodeCharacter{1E48}{\ubaraccent{N}}
+   \DeclareUnicodeCharacter{1E49}{\ubaraccent{n}}
+ 
+   \DeclareUnicodeCharacter{1E54}{\'P}
+   \DeclareUnicodeCharacter{1E55}{\'p}
+   \DeclareUnicodeCharacter{1E56}{\dotaccent{P}}
+   \DeclareUnicodeCharacter{1E57}{\dotaccent{p}}
+   \DeclareUnicodeCharacter{1E58}{\dotaccent{R}}
+   \DeclareUnicodeCharacter{1E59}{\dotaccent{r}}
+   \DeclareUnicodeCharacter{1E5A}{\udotaccent{R}}
+   \DeclareUnicodeCharacter{1E5B}{\udotaccent{r}}
+   \DeclareUnicodeCharacter{1E5E}{\ubaraccent{R}}
+   \DeclareUnicodeCharacter{1E5F}{\ubaraccent{r}}
+ 
+   \DeclareUnicodeCharacter{1E60}{\dotaccent{S}}
+   \DeclareUnicodeCharacter{1E61}{\dotaccent{s}}
+   \DeclareUnicodeCharacter{1E62}{\udotaccent{S}}
+   \DeclareUnicodeCharacter{1E63}{\udotaccent{s}}
+   \DeclareUnicodeCharacter{1E6A}{\dotaccent{T}}
+   \DeclareUnicodeCharacter{1E6B}{\dotaccent{t}}
+   \DeclareUnicodeCharacter{1E6C}{\udotaccent{T}}
+   \DeclareUnicodeCharacter{1E6D}{\udotaccent{t}}
+   \DeclareUnicodeCharacter{1E6E}{\ubaraccent{T}}
+   \DeclareUnicodeCharacter{1E6F}{\ubaraccent{t}}
+ 
+   \DeclareUnicodeCharacter{1E7C}{\~V}
+   \DeclareUnicodeCharacter{1E7D}{\~v}
+   \DeclareUnicodeCharacter{1E7E}{\udotaccent{V}}
+   \DeclareUnicodeCharacter{1E7F}{\udotaccent{v}}
+ 
+   \DeclareUnicodeCharacter{1E80}{\`W}
+   \DeclareUnicodeCharacter{1E81}{\`w}
+   \DeclareUnicodeCharacter{1E82}{\'W}
+   \DeclareUnicodeCharacter{1E83}{\'w}
+   \DeclareUnicodeCharacter{1E84}{\"W}
+   \DeclareUnicodeCharacter{1E85}{\"w}
+   \DeclareUnicodeCharacter{1E86}{\dotaccent{W}}
+   \DeclareUnicodeCharacter{1E87}{\dotaccent{w}}
+   \DeclareUnicodeCharacter{1E88}{\udotaccent{W}}
+   \DeclareUnicodeCharacter{1E89}{\udotaccent{w}}
+   \DeclareUnicodeCharacter{1E8A}{\dotaccent{X}}
+   \DeclareUnicodeCharacter{1E8B}{\dotaccent{x}}
+   \DeclareUnicodeCharacter{1E8C}{\"X}
+   \DeclareUnicodeCharacter{1E8D}{\"x}
+   \DeclareUnicodeCharacter{1E8E}{\dotaccent{Y}}
+   \DeclareUnicodeCharacter{1E8F}{\dotaccent{y}}
+ 
+   \DeclareUnicodeCharacter{1E90}{\^Z}
+   \DeclareUnicodeCharacter{1E91}{\^z}
+   \DeclareUnicodeCharacter{1E92}{\udotaccent{Z}}
+   \DeclareUnicodeCharacter{1E93}{\udotaccent{z}}
+   \DeclareUnicodeCharacter{1E94}{\ubaraccent{Z}}
+   \DeclareUnicodeCharacter{1E95}{\ubaraccent{z}}
+   \DeclareUnicodeCharacter{1E96}{\ubaraccent{h}}
+   \DeclareUnicodeCharacter{1E97}{\"t}
+   \DeclareUnicodeCharacter{1E98}{\ringaccent{w}}
+   \DeclareUnicodeCharacter{1E99}{\ringaccent{y}}
+ 
+   \DeclareUnicodeCharacter{1EA0}{\udotaccent{A}}
+   \DeclareUnicodeCharacter{1EA1}{\udotaccent{a}}
+ 
+   \DeclareUnicodeCharacter{1EB8}{\udotaccent{E}}
+   \DeclareUnicodeCharacter{1EB9}{\udotaccent{e}}
+   \DeclareUnicodeCharacter{1EBC}{\~E}
+   \DeclareUnicodeCharacter{1EBD}{\~e}
+ 
+   \DeclareUnicodeCharacter{1ECA}{\udotaccent{I}}
+   \DeclareUnicodeCharacter{1ECB}{\udotaccent{i}}
+   \DeclareUnicodeCharacter{1ECC}{\udotaccent{O}}
+   \DeclareUnicodeCharacter{1ECD}{\udotaccent{o}}
+ 
+   \DeclareUnicodeCharacter{1EE4}{\udotaccent{U}}
+   \DeclareUnicodeCharacter{1EE5}{\udotaccent{u}}
+ 
+   \DeclareUnicodeCharacter{1EF2}{\`Y}
+   \DeclareUnicodeCharacter{1EF3}{\`y}
+   \DeclareUnicodeCharacter{1EF4}{\udotaccent{Y}}
+ 
+   \DeclareUnicodeCharacter{1EF8}{\~Y}
+   \DeclareUnicodeCharacter{1EF9}{\~y}
+ 
+   \DeclareUnicodeCharacter{2013}{--}
+   \DeclareUnicodeCharacter{2014}{---}
+   \DeclareUnicodeCharacter{2018}{\quoteleft}
+   \DeclareUnicodeCharacter{2019}{\quoteright}
+   \DeclareUnicodeCharacter{201A}{\quotesinglbase}
+   \DeclareUnicodeCharacter{201C}{\quotedblleft}
+   \DeclareUnicodeCharacter{201D}{\quotedblright}
+   \DeclareUnicodeCharacter{201E}{\quotedblbase}
+   \DeclareUnicodeCharacter{2022}{\bullet}
+   \DeclareUnicodeCharacter{2026}{\dots}
+   \DeclareUnicodeCharacter{2039}{\guilsinglleft}
+   \DeclareUnicodeCharacter{203A}{\guilsinglright}
+   \DeclareUnicodeCharacter{20AC}{\euro}
+ 
+   \DeclareUnicodeCharacter{2192}{\expansion}
+   \DeclareUnicodeCharacter{21D2}{\result}
+ 
+   \DeclareUnicodeCharacter{2212}{\minus}
+   \DeclareUnicodeCharacter{2217}{\point}
+   \DeclareUnicodeCharacter{2261}{\equiv}
+ }% end of \utfeightchardefs
+ 
+ 
+ % US-ASCII character definitions.
+ \def\asciichardefs{% nothing need be done
+    \relax
+ }
+ 
+ % Make non-ASCII characters printable again for compatibility with
+ % existing Texinfo documents that may use them, even without declaring a
+ % document encoding.
+ %
+ \setnonasciicharscatcode \other
+ 
+ 
+ \message{formatting,}
+ 
+ \newdimen\defaultparindent \defaultparindent = 15pt
+ 
+ \chapheadingskip = 15pt plus 4pt minus 2pt
+ \secheadingskip = 12pt plus 3pt minus 2pt
+ \subsecheadingskip = 9pt plus 2pt minus 2pt
+ 
+ % Prevent underfull vbox error messages.
+ \vbadness = 10000
+ 
+ % Don't be very finicky about underfull hboxes, either.
+ \hbadness = 6666
+ 
+ % Following George Bush, get rid of widows and orphans.
+ \widowpenalty=10000
+ \clubpenalty=10000
+ 
+ % Use TeX 3.0's \emergencystretch to help line breaking, but if we're
+ % using an old version of TeX, don't do anything.  We want the amount of
+ % stretch added to depend on the line length, hence the dependence on
+ % \hsize.  We call this whenever the paper size is set.
+ %
+ \def\setemergencystretch{%
+   \ifx\emergencystretch\thisisundefined
+     % Allow us to assign to \emergencystretch anyway.
+     \def\emergencystretch{\dimen0}%
+   \else
+     \emergencystretch = .15\hsize
+   \fi
+ }
+ 
+ % Parameters in order: 1) textheight; 2) textwidth;
+ % 3) voffset; 4) hoffset; 5) binding offset; 6) topskip;
+ % 7) physical page height; 8) physical page width.
+ %
+ % We also call \setleading{\textleading}, so the caller should define
+ % \textleading.  The caller should also set \parskip.
+ %
+ \def\internalpagesizes#1#2#3#4#5#6#7#8{%
+   \voffset = #3\relax
+   \topskip = #6\relax
+   \splittopskip = \topskip
+   %
+   \vsize = #1\relax
+   \advance\vsize by \topskip
+   \outervsize = \vsize
+   \advance\outervsize by 2\topandbottommargin
+   \pageheight = \vsize
+   %
+   \hsize = #2\relax
+   \outerhsize = \hsize
+   \advance\outerhsize by 0.5in
+   \pagewidth = \hsize
+   %
+   \normaloffset = #4\relax
+   \bindingoffset = #5\relax
+   %
+   \ifpdf
+     \pdfpageheight #7\relax
+     \pdfpagewidth #8\relax
+     % if we don't reset these, they will remain at "1 true in" of
+     % whatever layout pdftex was dumped with.
+     \pdfhorigin = 1 true in
+     \pdfvorigin = 1 true in
+   \fi
+   %
+   \setleading{\textleading}
+   %
+   \parindent = \defaultparindent
+   \setemergencystretch
+ }
+ 
+ % @letterpaper (the default).
+ \def\letterpaper{{\globaldefs = 1
+   \parskip = 3pt plus 2pt minus 1pt
+   \textleading = 13.2pt
+   %
+   % If page is nothing but text, make it come out even.
+   \internalpagesizes{607.2pt}{6in}% that's 46 lines
+                     {\voffset}{.25in}%
+                     {\bindingoffset}{36pt}%
+                     {11in}{8.5in}%
+ }}
+ 
+ % Use @smallbook to reset parameters for 7x9.25 trim size.
+ \def\smallbook{{\globaldefs = 1
+   \parskip = 2pt plus 1pt
+   \textleading = 12pt
+   %
+   \internalpagesizes{7.5in}{5in}%
+                     {-.2in}{0in}%
+                     {\bindingoffset}{16pt}%
+                     {9.25in}{7in}%
+   %
+   \lispnarrowing = 0.3in
+   \tolerance = 700
+   \hfuzz = 1pt
+   \contentsrightmargin = 0pt
+   \defbodyindent = .5cm
+ }}
+ 
+ % Use @smallerbook to reset parameters for 6x9 trim size.
+ % (Just testing, parameters still in flux.)
+ \def\smallerbook{{\globaldefs = 1
+   \parskip = 1.5pt plus 1pt
+   \textleading = 12pt
+   %
+   \internalpagesizes{7.4in}{4.8in}%
+                     {-.2in}{-.4in}%
+                     {0pt}{14pt}%
+                     {9in}{6in}%
+   %
+   \lispnarrowing = 0.25in
+   \tolerance = 700
+   \hfuzz = 1pt
+   \contentsrightmargin = 0pt
+   \defbodyindent = .4cm
+ }}
+ 
+ % Use @afourpaper to print on European A4 paper.
+ \def\afourpaper{{\globaldefs = 1
+   \parskip = 3pt plus 2pt minus 1pt
+   \textleading = 13.2pt
+   %
+   % Double-side printing via postscript on Laserjet 4050
+   % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
+   % To change the settings for a different printer or situation, adjust
+   % \normaloffset until the front-side and back-side texts align.  Then
+   % do the same for \bindingoffset.  You can set these for testing in
+   % your texinfo source file like this:
+   % @tex
+   % \global\normaloffset = -6mm
+   % \global\bindingoffset = 10mm
+   % @end tex
+   \internalpagesizes{673.2pt}{160mm}% that's 51 lines
+                     {\voffset}{\hoffset}%
+                     {\bindingoffset}{44pt}%
+                     {297mm}{210mm}%
+   %
+   \tolerance = 700
+   \hfuzz = 1pt
+   \contentsrightmargin = 0pt
+   \defbodyindent = 5mm
+ }}
+ 
+ % Use @afivepaper to print on European A5 paper.
+ % From romildo@urano.iceb.ufop.br, 2 July 2000.
+ % He also recommends making @example and @lisp be small.
+ \def\afivepaper{{\globaldefs = 1
+   \parskip = 2pt plus 1pt minus 0.1pt
+   \textleading = 12.5pt
+   %
+   \internalpagesizes{160mm}{120mm}%
+                     {\voffset}{\hoffset}%
+                     {\bindingoffset}{8pt}%
+                     {210mm}{148mm}%
+   %
+   \lispnarrowing = 0.2in
+   \tolerance = 800
+   \hfuzz = 1.2pt
+   \contentsrightmargin = 0pt
+   \defbodyindent = 2mm
+   \tableindent = 12mm
+ }}
+ 
+ % A specific text layout, 24x15cm overall, intended for A4 paper.
+ \def\afourlatex{{\globaldefs = 1
+   \afourpaper
+   \internalpagesizes{237mm}{150mm}%
+                     {\voffset}{4.6mm}%
+                     {\bindingoffset}{7mm}%
+                     {297mm}{210mm}%
+   %
+   % Must explicitly reset to 0 because we call \afourpaper.
+   \globaldefs = 0
+ }}
+ 
+ % Use @afourwide to print on A4 paper in landscape format.
+ \def\afourwide{{\globaldefs = 1
+   \afourpaper
+   \internalpagesizes{241mm}{165mm}%
+                     {\voffset}{-2.95mm}%
+                     {\bindingoffset}{7mm}%
+                     {297mm}{210mm}%
+   \globaldefs = 0
+ }}
+ 
+ % @pagesizes TEXTHEIGHT[,TEXTWIDTH]
+ % Perhaps we should allow setting the margins, \topskip, \parskip,
+ % and/or leading, also. Or perhaps we should compute them somehow.
+ %
+ \parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
+ \def\pagesizesyyy#1,#2,#3\finish{{%
+   \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
+   \globaldefs = 1
+   %
+   \parskip = 3pt plus 2pt minus 1pt
+   \setleading{\textleading}%
+   %
+   \dimen0 = #1\relax
+   \advance\dimen0 by \voffset
+   %
+   \dimen2 = \hsize
+   \advance\dimen2 by \normaloffset
+   %
+   \internalpagesizes{#1}{\hsize}%
+                     {\voffset}{\normaloffset}%
+                     {\bindingoffset}{44pt}%
+                     {\dimen0}{\dimen2}%
+ }}
+ 
+ % Set default to letter.
+ %
+ \letterpaper
+ 
+ 
+ \message{and turning on texinfo input format.}
+ 
+ \def^^L{\par} % remove \outer, so ^L can appear in an @comment
+ 
+ % DEL is a comment character, in case @c does not suffice.
+ \catcode`\^^? = 14
+ 
+ % Define macros to output various characters with catcode for normal text.
+ \catcode`\"=\other \def\normaldoublequote{"}
+ \catcode`\$=\other \def\normaldollar{$}%$ font-lock fix
+ \catcode`\+=\other \def\normalplus{+}
+ \catcode`\<=\other \def\normalless{<}
+ \catcode`\>=\other \def\normalgreater{>}
+ \catcode`\^=\other \def\normalcaret{^}
+ \catcode`\_=\other \def\normalunderscore{_}
+ \catcode`\|=\other \def\normalverticalbar{|}
+ \catcode`\~=\other \def\normaltilde{~}
+ 
+ % This macro is used to make a character print one way in \tt
+ % (where it can probably be output as-is), and another way in other fonts,
+ % where something hairier probably needs to be done.
+ %
+ % #1 is what to print if we are indeed using \tt; #2 is what to print
+ % otherwise.  Since all the Computer Modern typewriter fonts have zero
+ % interword stretch (and shrink), and it is reasonable to expect all
+ % typewriter fonts to have this, we can check that font parameter.
+ %
+ \def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
+ 
+ % Same as above, but check for italic font.  Actually this also catches
+ % non-italic slanted fonts since it is impossible to distinguish them from
+ % italic fonts.  But since this is only used by $ and it uses \sl anyway
+ % this is not a problem.
+ \def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
+ 
+ % Turn off all special characters except @
+ % (and those which the user can use as if they were ordinary).
+ % Most of these we simply print from the \tt font, but for some, we can
+ % use math or other variants that look better in normal text.
+ 
+ \catcode`\"=\active
+ \def\activedoublequote{{\tt\char34}}
+ \let"=\activedoublequote
+ \catcode`\~=\active \def\activetilde{{\tt\char126}} \let~ = \activetilde
+ \chardef\hat=`\^
+ \catcode`\^=\active \def\activehat{{\tt \hat}} \let^ = \activehat
+ 
+ \catcode`\_=\active
+ \def_{\ifusingtt\normalunderscore\_}
+ \let\realunder=_
+ % Subroutine for the previous macro.
+ \def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
+ 
+ \catcode`\|=\active
+ \def|{{\tt\char124}}
+ 
+ \chardef \less=`\<
+ \catcode`\<=\active \def\activeless{{\tt \less}}\let< = \activeless
+ \chardef \gtr=`\>
+ \catcode`\>=\active \def\activegtr{{\tt \gtr}}\let> = \activegtr
+ \catcode`\+=\active \def+{{\tt \char 43}}
+ \catcode`\$=\active \def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
+ 
+ % used for headline/footline in the output routine, in case the page
+ % breaks in the middle of an @tex block.
+ \def\texinfochars{%
+   \let< = \activeless
+   \let> = \activegtr
+   \let~ = \activetilde 
+   \let^ = \activehat
+   \markupsetuplqdefault \markupsetuprqdefault 
+   \let\b = \strong
+   \let\i = \smartitalic
+   % in principle, all other definitions in \tex have to be undone too.
+ }
+ 
+ % If a .fmt file is being used, characters that might appear in a file
+ % name cannot be active until we have parsed the command line.
+ % So turn them off again, and have \everyjob (or @setfilename) turn them on.
+ % \otherifyactive is called near the end of this file.
+ \def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
+ 
+ % Used sometimes to turn off (effectively) the active characters even after
+ % parsing them.
+ \def\turnoffactive{%
+   \normalturnoffactive
+   \otherbackslash
+ }
+ 
+ \catcode`\@=0
+ 
+ % \backslashcurfont outputs one backslash character in current font,
+ % as in \char`\\.
+ \global\chardef\backslashcurfont=`\\
+ \global\let\rawbackslashxx=\backslashcurfont  % let existing .??s files work
+ 
+ % \realbackslash is an actual character `\' with catcode other, and
+ % \doublebackslash is two of them (for the pdf outlines).
+ {\catcode`\\=\other @gdef@realbackslash{\} @gdef@doublebackslash{\\}}
+ 
+ % In texinfo, backslash is an active character; it prints the backslash
+ % in fixed width font.
+ \catcode`\\=\active  % @ for escape char from now on.
+ 
+ % The story here is that in math mode, the \char of \backslashcurfont
+ % ends up printing the roman \ from the math symbol font (because \char
+ % in math mode uses the \mathcode, and plain.tex sets
+ % \mathcode`\\="026E).  It seems better for @backslashchar{} to always
+ % print a typewriter backslash, hence we use an explicit \mathchar,
+ % which is the decimal equivalent of "715c (class 7, e.g., use \fam;
+ % ignored family value; char position "5C).  We can't use " for the
+ % usual hex value because it has already been made active.
+ @def@normalbackslash{{@tt @ifmmode @mathchar29020 @else @backslashcurfont @fi}}
+ @let@backslashchar = @normalbackslash % @backslashchar{} is for user documents.
+ 
+ % On startup, @fixbackslash assigns:
+ %  @let \ = @normalbackslash
+ % \rawbackslash defines an active \ to do \backslashcurfont.
+ % \otherbackslash defines an active \ to be a literal `\' character with
+ % catcode other.  We switch back and forth between these.
+ @gdef@rawbackslash{@let\=@backslashcurfont}
+ @gdef@otherbackslash{@let\=@realbackslash}
+ 
+ % Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
+ % the literal character `\'.  Also revert - to its normal character, in
+ % case the active - from code has slipped in.
+ %
+ {@catcode`- = @active
+  @gdef@normalturnoffactive{%
+    @let-=@normaldash
+    @let"=@normaldoublequote
+    @let$=@normaldollar %$ font-lock fix
+    @let+=@normalplus
+    @let<=@normalless
+    @let>=@normalgreater
+    @let\=@normalbackslash
+    @let^=@normalcaret
+    @let_=@normalunderscore
+    @let|=@normalverticalbar
+    @let~=@normaltilde
+    @markupsetuplqdefault
+    @markupsetuprqdefault
+    @unsepspaces
+  }
+ }
+ 
+ % Make _ and + \other characters, temporarily.
+ % This is canceled by @fixbackslash.
+ @otherifyactive
+ 
+ % If a .fmt file is being used, we don't want the `\input texinfo' to show up.
+ % That is what \eatinput is for; after that, the `\' should revert to printing
+ % a backslash.
+ %
+ @gdef@eatinput input texinfo{@fixbackslash}
+ @global@let\ = @eatinput
+ 
+ % On the other hand, perhaps the file did not have a `\input texinfo'. Then
+ % the first `\' in the file would cause an error. This macro tries to fix
+ % that, assuming it is called before the first `\' could plausibly occur.
+ % Also turn back on active characters that might appear in the input
+ % file name, in case not using a pre-dumped format.
+ %
+ @gdef@fixbackslash{%
+   @ifx\@eatinput @let\ = @normalbackslash @fi
+   @catcode`+=@active
+   @catcode`@_=@active
+ }
+ 
+ % Say @foo, not \foo, in error messages.
+ @escapechar = `@@
+ 
+ % These (along with & and #) are made active for url-breaking, so need
+ % active definitions as the normal characters.
+ @def@normaldot{.}
+ @def@normalquest{?}
+ @def@normalslash{/}
+ 
+ % These look ok in all fonts, so just make them not special.
+ % @hashchar{} gets its own user-level command, because of #line.
+ @catcode`@& = @other @def@normalamp{&}
+ @catcode`@# = @other @def@normalhash{#}
+ @catcode`@% = @other @def@normalpercent{%}
+ 
+ @let @hashchar = @normalhash
+ 
+ @c Finally, make ` and ' active, so that txicodequoteundirected and
+ @c txicodequotebacktick work right in, e.g., @w{@code{`foo'}}.  If we
+ @c don't make ` and ' active, @code will not get them as active chars.
+ @c Do this last of all since we use ` in the previous @catcode assignments.
+ @catcode`@'=@active
+ @catcode`@`=@active
+ @markupsetuplqdefault
+ @markupsetuprqdefault
+ 
+ @c Local variables:
+ @c eval: (add-hook 'write-file-hooks 'time-stamp)
+ @c page-delimiter: "^\\\\message"
+ @c time-stamp-start: "def\\\\texinfoversion{"
+ @c time-stamp-format: "%:y-%02m-%02d.%02H"
+ @c time-stamp-end: "}"
+ @c End:
+ 
+ @c vim:sw=2:
+ 
+ @ignore
+    arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115
+ @end ignore
diff -rc2P 3DLDF-2.0.2/examples/00README 3DLDF-2.0.3/examples/00README
*** 3DLDF-2.0.2/examples/00README	Thu Nov  7 15:57:55 2013
--- 3DLDF-2.0.3/examples/00README	Fri Dec 13 16:35:23 2013
***************
*** 10,19 ****
  LDF 2013.11.07.
  
! This directory (`[...]/3DLDF-2.0/examples/') contains examples of how to use 3dldf 
  together with MetaPost, TeX, dvips and ps2pdf to generate three-dimensional graphics.
  
- The distribution includes the generated PostScript and PDF files, so neither 3dldf 
- nor any of the other packages have to be installed in order to generate them.  
- 
  In order to prevent them from being generated, the `Makefile.am' does not contain rules
  for doing this.  Instead, it contains the rule `rebuild', which calls `make' recursively
--- 10,16 ----
  LDF 2013.11.07.
  
! This directory (`3DLDF-2.0.3/examples/') contains examples of how to use 3dldf 
  together with MetaPost, TeX, dvips and ps2pdf to generate three-dimensional graphics.
  
  In order to prevent them from being generated, the `Makefile.am' does not contain rules
  for doing this.  Instead, it contains the rule `rebuild', which calls `make' recursively
***************
*** 27,33 ****
  Please see the files `Makefile.am' and `Makefile_sub' for more information.
  
  
! #### ** (2)
  
  
  #### * (1)
--- 24,37 ----
  Please see the files `Makefile.am' and `Makefile_sub' for more information.
  
+ PLEASE NOTE:  In order to reduce the size of the distribution of the GNU 3DLDF package itself, i.e., 
+ the compressed archive file ("tarball") `3DLDF-2.0.3.tar.gz', the generated PostScript and PDF files
+ are not included in the distribution.  However, in order to make them available without requiring 
+ GNU 3DLDF to have been installed successfully previously, they are distributed separately in 
+ the file `3DLDF-2.0.3-examples.tar.gz', along with the contents of this directory.
  
! `3DLDF-2.0.3-examples.tar.gz' should be available wherever the distribution is, in particular, 
! on `ftp.gnu.org/gnu/3dldf' or any of its mirrors.
  
+ #### ** (2)
  
  #### * (1)
diff -rc2P 3DLDF-2.0.2/examples/Makefile.am 3DLDF-2.0.3/examples/Makefile.am
*** 3DLDF-2.0.2/examples/Makefile.am	Thu Nov  7 16:06:07 2013
--- 3DLDF-2.0.3/examples/Makefile.am	Fri Dec 13 16:38:02 2013
***************
*** 1,3 ****
! #### 3DLDF-2.0/examples/Makefile.am
  #### Created by Laurence D. Finston (LDF) Mon Nov  4 18:55:22 CET 2013
  
--- 1,3 ----
! #### 3DLDF-2.0.3/examples/Makefile.am
  #### Created by Laurence D. Finston (LDF) Mon Nov  4 18:55:22 CET 2013
  
***************
*** 71,74 ****
--- 71,88 ----
  # stlltn05.mp
  
+ #### Errors now occur when these two files are passed to 3dldf as input.
+ #### The problems cannot be fixed easily.
+ #### LDF 2013.12.11.
+ #### elpsd_17.ldf
+ #### plyhd_05.ldf
+ ####
+ #### LDF 2013.12.11.
+ 
+ #### Chess fonts may not be available.
+ #### chssbrds.ldf
+ #### chssbrds.txt
+ ####
+ #### LDF 2013.12.11.
+ 
  # The generated mp files need to be modified, so the mp files are included in
  # the distribution.  Check this!  LDF 2013.11.05.
***************
*** 76,86 ****
  LDF_FILES := arc_1.ldf arc_1.ldf bldelem1.ldf bldelem2.ldf bldelem3.ldf \
               bldelem4.ldf bldelem5.ldf braik_01.ldf braik_02.ldf braik_03.ldf \
!              chssbrds.ldf clktwr_01.ldf cones01.ldf cubd_01.ldf cubd_02.ldf \
               cubd_06.ldf cycld_1.ldf cycld_2.ldf dodec_01.ldf dodec_02.ldf \
               dodec_03.ldf ellpln01.ldf elpdmd01.ldf elpsd_02.ldf elpsd_06.ldf \
!              elpsd_13.ldf elpsd_17.ldf fctcn01.ldf goboards.ldf grrhm_02.ldf \
               grrhm_06.ldf hyprb_00.ldf hyprb_01.ldf hyprb_02.ldf hyprb_03.ldf \
               hyprb_04.ldf hyprb_05.ldf intrfr_2.ldf intrfr_3.ldf intrfr_5.ldf \
!              intrfr_6.ldf intrfr_7.ldf kntpoly1.ldf plyhd_01.ldf plyhd_05.ldf \
               polyrhyt.ldf pprcut01.ldf prbla_00.ldf prbla_01.ldf prbla_05.ldf \
               prbla_06.ldf prbla_10.ldf prbla_11.ldf prbla_12.ldf rhmtrc_01.ldf \
--- 90,100 ----
  LDF_FILES := arc_1.ldf arc_1.ldf bldelem1.ldf bldelem2.ldf bldelem3.ldf \
               bldelem4.ldf bldelem5.ldf braik_01.ldf braik_02.ldf braik_03.ldf \
!              clktwr_01.ldf cones01.ldf cubd_01.ldf cubd_02.ldf \
               cubd_06.ldf cycld_1.ldf cycld_2.ldf dodec_01.ldf dodec_02.ldf \
               dodec_03.ldf ellpln01.ldf elpdmd01.ldf elpsd_02.ldf elpsd_06.ldf \
!              elpsd_13.ldf fctcn01.ldf goboards.ldf grrhm_02.ldf \
               grrhm_06.ldf hyprb_00.ldf hyprb_01.ldf hyprb_02.ldf hyprb_03.ldf \
               hyprb_04.ldf hyprb_05.ldf intrfr_2.ldf intrfr_3.ldf intrfr_5.ldf \
!              intrfr_6.ldf intrfr_7.ldf kntpoly1.ldf plyhd_01.ldf \
               polyrhyt.ldf pprcut01.ldf prbla_00.ldf prbla_01.ldf prbla_05.ldf \
               prbla_06.ldf prbla_10.ldf prbla_11.ldf prbla_12.ldf rhmtrc_01.ldf \
***************
*** 90,94 ****
  
  TEX_FILES := arc_1.txt bldelem1.txt bldelem2.txt bldelem3.txt bldelem4.txt \
!              bldelem5.txt braik_01.txt braik_02.txt braik_03.txt chssbrds.txt \
               clktwr_01.txt cycld_1.txt cycld_2.txt dodec_01.txt dodec_02.txt \
               dodec_03.txt ellpln01.txt elpdmd01.txt fctcn01.txt  \
--- 104,108 ----
  
  TEX_FILES := arc_1.txt bldelem1.txt bldelem2.txt bldelem3.txt bldelem4.txt \
!              bldelem5.txt braik_01.txt braik_02.txt braik_03.txt \
               clktwr_01.txt cycld_1.txt cycld_2.txt dodec_01.txt dodec_02.txt \
               dodec_03.txt ellpln01.txt elpdmd01.txt fctcn01.txt  \
***************
*** 142,146 ****
  #### LDF 2013.11.05.
  
! EXTRA_DIST = 00README $(PS_FILES) $(PDF_FILES) $(LDF_FILES) $(TEX_FILES) \
               $(NON_GEN_MP_FILES) $(LMC_FILES) Makefile.am Makefile.in Makefile_sub \
               fmt8511.txt fmtdina4.txt wave_1.ldf wave_1.mp.bak wave_2.ldf wave_2.mp.bak
--- 156,165 ----
  #### LDF 2013.11.05.
  
! #### Removed the PostScript and PDF files from the distribution.
! #### I will distribute them separately.
! ####
! #### $(PS_FILES) $(PDF_FILES) 
! 
! EXTRA_DIST = 00README $(LDF_FILES) $(TEX_FILES) \
               $(NON_GEN_MP_FILES) $(LMC_FILES) Makefile.am Makefile.in Makefile_sub \
               fmt8511.txt fmtdina4.txt wave_1.ldf wave_1.mp.bak wave_2.ldf wave_2.mp.bak
***************
*** 200,205 ****
  query:
  	@echo "LDF_FILES == $(LDF_FILES)"
! 	$(MAKE) -f Makefile_sub query
  
  # @echo "TEX == $(TEX)"
  # @echo "CXXCOMPILE == $(CXXCOMPILE)"
--- 219,225 ----
  query:
  	@echo "LDF_FILES == $(LDF_FILES)"
! 	@echo "PS_FILES == $(PS_FILES)"
  
+ # $(MAKE) -f Makefile_sub query
  # @echo "TEX == $(TEX)"
  # @echo "CXXCOMPILE == $(CXXCOMPILE)"
diff -rc2P 3DLDF-2.0.2/examples/Makefile.in 3DLDF-2.0.3/examples/Makefile.in
*** 3DLDF-2.0.2/examples/Makefile.in	Sun Nov 10 18:30:13 2013
--- 3DLDF-2.0.3/examples/Makefile.in	Fri Dec 13 16:56:54 2013
***************
*** 15,19 ****
  @SET_MAKE@
  
! #### 3DLDF-2.0/examples/Makefile.am
  #### Created by Laurence D. Finston (LDF) Mon Nov  4 18:55:22 CET 2013
  
--- 15,19 ----
  @SET_MAKE@
  
! #### 3DLDF-2.0.3/examples/Makefile.am
  #### Created by Laurence D. Finston (LDF) Mon Nov  4 18:55:22 CET 2013
  
***************
*** 81,84 ****
--- 81,98 ----
  # stlltn05.mp
  
+ #### Errors now occur when these two files are passed to 3dldf as input.
+ #### The problems cannot be fixed easily.
+ #### LDF 2013.12.11.
+ #### elpsd_17.ldf
+ #### plyhd_05.ldf
+ ####
+ #### LDF 2013.12.11.
+ 
+ #### Chess fonts may not be available.
+ #### chssbrds.ldf
+ #### chssbrds.txt
+ ####
+ #### LDF 2013.12.11.
+ 
  # The generated mp files need to be modified, so the mp files are included in
  # the distribution.  Check this!  LDF 2013.11.05.
***************
*** 313,323 ****
  LDF_FILES := arc_1.ldf arc_1.ldf bldelem1.ldf bldelem2.ldf bldelem3.ldf \
               bldelem4.ldf bldelem5.ldf braik_01.ldf braik_02.ldf braik_03.ldf \
!              chssbrds.ldf clktwr_01.ldf cones01.ldf cubd_01.ldf cubd_02.ldf \
               cubd_06.ldf cycld_1.ldf cycld_2.ldf dodec_01.ldf dodec_02.ldf \
               dodec_03.ldf ellpln01.ldf elpdmd01.ldf elpsd_02.ldf elpsd_06.ldf \
!              elpsd_13.ldf elpsd_17.ldf fctcn01.ldf goboards.ldf grrhm_02.ldf \
               grrhm_06.ldf hyprb_00.ldf hyprb_01.ldf hyprb_02.ldf hyprb_03.ldf \
               hyprb_04.ldf hyprb_05.ldf intrfr_2.ldf intrfr_3.ldf intrfr_5.ldf \
!              intrfr_6.ldf intrfr_7.ldf kntpoly1.ldf plyhd_01.ldf plyhd_05.ldf \
               polyrhyt.ldf pprcut01.ldf prbla_00.ldf prbla_01.ldf prbla_05.ldf \
               prbla_06.ldf prbla_10.ldf prbla_11.ldf prbla_12.ldf rhmtrc_01.ldf \
--- 327,337 ----
  LDF_FILES := arc_1.ldf arc_1.ldf bldelem1.ldf bldelem2.ldf bldelem3.ldf \
               bldelem4.ldf bldelem5.ldf braik_01.ldf braik_02.ldf braik_03.ldf \
!              clktwr_01.ldf cones01.ldf cubd_01.ldf cubd_02.ldf \
               cubd_06.ldf cycld_1.ldf cycld_2.ldf dodec_01.ldf dodec_02.ldf \
               dodec_03.ldf ellpln01.ldf elpdmd01.ldf elpsd_02.ldf elpsd_06.ldf \
!              elpsd_13.ldf fctcn01.ldf goboards.ldf grrhm_02.ldf \
               grrhm_06.ldf hyprb_00.ldf hyprb_01.ldf hyprb_02.ldf hyprb_03.ldf \
               hyprb_04.ldf hyprb_05.ldf intrfr_2.ldf intrfr_3.ldf intrfr_5.ldf \
!              intrfr_6.ldf intrfr_7.ldf kntpoly1.ldf plyhd_01.ldf \
               polyrhyt.ldf pprcut01.ldf prbla_00.ldf prbla_01.ldf prbla_05.ldf \
               prbla_06.ldf prbla_10.ldf prbla_11.ldf prbla_12.ldf rhmtrc_01.ldf \
***************
*** 327,331 ****
  
  TEX_FILES := arc_1.txt bldelem1.txt bldelem2.txt bldelem3.txt bldelem4.txt \
!              bldelem5.txt braik_01.txt braik_02.txt braik_03.txt chssbrds.txt \
               clktwr_01.txt cycld_1.txt cycld_2.txt dodec_01.txt dodec_02.txt \
               dodec_03.txt ellpln01.txt elpdmd01.txt fctcn01.txt  \
--- 341,345 ----
  
  TEX_FILES := arc_1.txt bldelem1.txt bldelem2.txt bldelem3.txt bldelem4.txt \
!              bldelem5.txt braik_01.txt braik_02.txt braik_03.txt \
               clktwr_01.txt cycld_1.txt cycld_2.txt dodec_01.txt dodec_02.txt \
               dodec_03.txt ellpln01.txt elpdmd01.txt fctcn01.txt  \
***************
*** 360,364 ****
  ####
  #### LDF 2013.11.05.
! EXTRA_DIST = 00README $(PS_FILES) $(PDF_FILES) $(LDF_FILES) $(TEX_FILES) \
               $(NON_GEN_MP_FILES) $(LMC_FILES) Makefile.am Makefile.in Makefile_sub \
               fmt8511.txt fmtdina4.txt wave_1.ldf wave_1.mp.bak wave_2.ldf wave_2.mp.bak
--- 374,383 ----
  ####
  #### LDF 2013.11.05.
! 
! #### Removed the PostScript and PDF files from the distribution.
! #### I will distribute them separately.
! ####
! #### $(PS_FILES) $(PDF_FILES) 
! EXTRA_DIST = 00README $(LDF_FILES) $(TEX_FILES) \
               $(NON_GEN_MP_FILES) $(LMC_FILES) Makefile.am Makefile.in Makefile_sub \
               fmt8511.txt fmtdina4.txt wave_1.ldf wave_1.mp.bak wave_2.ldf wave_2.mp.bak
***************
*** 620,625 ****
  query:
  	@echo "LDF_FILES == $(LDF_FILES)"
! 	$(MAKE) -f Makefile_sub query
  
  # @echo "TEX == $(TEX)"
  # @echo "CXXCOMPILE == $(CXXCOMPILE)"
--- 639,645 ----
  query:
  	@echo "LDF_FILES == $(LDF_FILES)"
! 	@echo "PS_FILES == $(PS_FILES)"
  
+ # $(MAKE) -f Makefile_sub query
  # @echo "TEX == $(TEX)"
  # @echo "CXXCOMPILE == $(CXXCOMPILE)"
diff -rc2P 3DLDF-2.0.2/examples/Makefile_sub 3DLDF-2.0.3/examples/Makefile_sub
*** 3DLDF-2.0.2/examples/Makefile_sub	Thu Nov  7 15:38:01 2013
--- 3DLDF-2.0.3/examples/Makefile_sub	Fri Dec 13 16:38:03 2013
***************
*** 1,4 ****
  #### Makefile_sub
! #### [...]/3DLDF-2.0/examples/Makefile_sub
  
  #### Created by Laurence D. Finston (LDF) Thu Nov  7 16:31:41 CET 2013
--- 1,4 ----
  #### Makefile_sub
! #### [...]/3DLDF-2.0.3/examples/Makefile_sub
  
  #### Created by Laurence D. Finston (LDF) Thu Nov  7 16:31:41 CET 2013
Only in 3DLDF-2.0.2/examples: arc_1.pdf
Only in 3DLDF-2.0.2/examples: arc_1.ps
Only in 3DLDF-2.0.2/examples: bldelem1.pdf
Only in 3DLDF-2.0.2/examples: bldelem1.ps
diff -rc2P 3DLDF-2.0.2/examples/bldelem1.txt 3DLDF-2.0.3/examples/bldelem1.txt
*** 3DLDF-2.0.2/examples/bldelem1.txt	Tue Nov  5 14:26:49 2013
--- 3DLDF-2.0.3/examples/bldelem1.txt	Fri Nov 15 13:10:33 2013
***************
*** 152,160 ****
  %\hsize=420mm
  
! %% \advance\voffset by -1in
! %% \advance\voffset by 1.25cm
! %% \advance\hoffset by -1in
! %% \advance\hoffset by 1cm
! 
  
  
--- 152,159 ----
  %\hsize=420mm
  
! \advance\voffset by -1in
! \advance\voffset by 1.25cm
! \advance\hoffset by -1in
! \advance\hoffset by 1cm
  
  
Only in 3DLDF-2.0.2/examples: bldelem2.pdf
Only in 3DLDF-2.0.2/examples: bldelem2.ps
Only in 3DLDF-2.0.2/examples: bldelem3.pdf
Only in 3DLDF-2.0.2/examples: bldelem3.ps
Only in 3DLDF-2.0.2/examples: bldelem4.pdf
Only in 3DLDF-2.0.2/examples: bldelem4.ps
Only in 3DLDF-2.0.2/examples: bldelem5.pdf
Only in 3DLDF-2.0.2/examples: bldelem5.ps
Only in 3DLDF-2.0.2/examples: braik_01.pdf
Only in 3DLDF-2.0.2/examples: braik_01.ps
Only in 3DLDF-2.0.2/examples: braik_02.pdf
Only in 3DLDF-2.0.2/examples: braik_02.ps
Only in 3DLDF-2.0.2/examples: braik_03.pdf
Only in 3DLDF-2.0.2/examples: braik_03.ps
Only in 3DLDF-2.0.2/examples: chssbrds.ldf
Only in 3DLDF-2.0.2/examples: chssbrds.pdf
Only in 3DLDF-2.0.2/examples: chssbrds.ps
Only in 3DLDF-2.0.2/examples: chssbrds.txt
Only in 3DLDF-2.0.2/examples: clktwr_01.pdf
Only in 3DLDF-2.0.2/examples: clktwr_01.ps
diff -rc2P 3DLDF-2.0.2/examples/cubd_06.ldf 3DLDF-2.0.3/examples/cubd_06.ldf
*** 3DLDF-2.0.2/examples/cubd_06.ldf	Mon Nov  4 18:00:45 2013
--- 3DLDF-2.0.3/examples/cubd_06.ldf	Wed Dec 11 18:56:53 2013
***************
*** 86,93 ****
  
  draw c;
  draw r with_color red;
  
  plane q;
! q := (plane) r;
  
  polygon poly;
--- 86,95 ----
  
  draw c;
+ 
  draw r with_color red;
  
  plane q;
! 
! q := get_plane r;
  
  polygon poly;
***************
*** 102,106 ****
  endfor;
  
- 
  label.lrt("$i_0$", p0);  
  label.lft("$i_1$",  p1);   
--- 104,107 ----
***************
*** 117,121 ****
  label_pt := (0, -10);
  
- 
  beginfig(2); 
  output save_picture with_projection parallel_x_z with_factor .75;
--- 118,121 ----
***************
*** 123,127 ****
  endfig with_projection parallel_x_y;
  
- 
  beginfig(3); 
  output save_picture with_projection parallel_x_y with_factor .75;
--- 123,126 ----
Only in 3DLDF-2.0.2/examples: cycld_1.pdf
Only in 3DLDF-2.0.2/examples: cycld_1.ps
Only in 3DLDF-2.0.2/examples: cycld_2.pdf
Only in 3DLDF-2.0.2/examples: cycld_2.ps
Only in 3DLDF-2.0.2/examples: dodec_01.pdf
Only in 3DLDF-2.0.2/examples: dodec_01.ps
diff -rc2P 3DLDF-2.0.2/examples/dodec_02.ldf 3DLDF-2.0.3/examples/dodec_02.ldf
*** 3DLDF-2.0.2/examples/dodec_02.ldf	Tue Nov  5 14:29:23 2013
--- 3DLDF-2.0.3/examples/dodec_02.ldf	Sun Nov 10 20:35:55 2013
***************
*** 70,75 ****
--- 70,77 ----
  %% ** (2) draw_dodecahedron_net
  
+ 
  input "dodec_02.lmc";
  
+ 
  %% *** (3) Global declarations and initializations
  
diff -rc2P 3DLDF-2.0.2/examples/dodec_02.lmc 3DLDF-2.0.3/examples/dodec_02.lmc
*** 3DLDF-2.0.2/examples/dodec_02.lmc	Tue Nov  5 14:29:24 2013
--- 3DLDF-2.0.3/examples/dodec_02.lmc	Sun Nov 10 20:54:05 2013
***************
*** 97,100 ****
--- 97,101 ----
  rpv := get_net dodecahedron with_diameter diameter;
  
+ 
  %% rpv needs to be rotated because the routines for "folding"
  %% the net to make polyhedra in 3DLDF fold upwards, whereas
***************
*** 157,160 ****
--- 158,162 ----
  endfor;
  
+ 
  %% **** (4) Draw stitch lines.
  
Only in 3DLDF-2.0.2/examples: dodec_02.pdf
Only in 3DLDF-2.0.2/examples: dodec_02.ps
Only in 3DLDF-2.0.2/examples: dodec_03.pdf
Only in 3DLDF-2.0.2/examples: dodec_03.ps
Only in 3DLDF-2.0.2/examples: ellpln01.pdf
Only in 3DLDF-2.0.2/examples: ellpln01.ps
Only in 3DLDF-2.0.2/examples: elpdmd01.pdf
Only in 3DLDF-2.0.2/examples: elpdmd01.ps
diff -rc2P 3DLDF-2.0.2/examples/elpsd_06.ldf 3DLDF-2.0.3/examples/elpsd_06.ldf
*** 3DLDF-2.0.2/examples/elpsd_06.ldf	Mon Nov  4 18:00:45 2013
--- 3DLDF-2.0.3/examples/elpsd_06.ldf	Wed Dec 11 19:00:29 2013
***************
*** 83,87 ****
  
  ellipse e;
! e := get_ellipse 3 E;
  
  p2 := get_point 60 e; %% On the surface.
--- 83,88 ----
  
  ellipse e;
! 
! e := get_ellipse (3) E;
  
  p2 := get_point 60 e; %% On the surface.
Only in 3DLDF-2.0.2/examples: elpsd_17.ldf
Only in 3DLDF-2.0.2/examples: fctcn01.pdf
Only in 3DLDF-2.0.2/examples: fctcn01.ps
Only in 3DLDF-2.0.2/examples: goboards.pdf
Only in 3DLDF-2.0.2/examples: goboards.ps
diff -rc2P 3DLDF-2.0.2/examples/grrhm_02.ldf 3DLDF-2.0.3/examples/grrhm_02.ldf
*** 3DLDF-2.0.2/examples/grrhm_02.ldf	Mon Nov  4 18:00:45 2013
--- 3DLDF-2.0.3/examples/grrhm_02.ldf	Wed Dec 11 19:00:29 2013
***************
*** 72,77 ****
  
  beginfig(1); 
  polyhedron gr;
! gr := unit_great_rhombicosidododecahedron scaled 4;
  
  polygon poly[];
--- 72,79 ----
  
  beginfig(1); 
+ 
  polyhedron gr;
! 
! gr := unit_great_rhombicosidodecahedron scaled (4, 0);
  
  polygon poly[];
***************
*** 104,107 ****
--- 106,110 ----
  
  beginfig(2); 
+ 
  for i = 0 upto size gr - 1:
     poly[i] := get_reg_polygon (i) gr;
***************
*** 128,131 ****
--- 131,135 ----
  
  beginfig(4); 
+ 
  for i = 0 upto size gr - 1:
     poly[i] := get_reg_polygon (i) gr;
***************
*** 147,152 ****
  endfig with_projection parallel_z_y; 
  
- 
- 
  verbatim_metapost "end";
  end;
--- 151,154 ----
Only in 3DLDF-2.0.2/examples: grrhm_06.pdf
Only in 3DLDF-2.0.2/examples: grrhm_06.ps
Only in 3DLDF-2.0.2/examples: hyprb_00.pdf
Only in 3DLDF-2.0.2/examples: hyprb_00.ps
Only in 3DLDF-2.0.2/examples: hyprb_01.pdf
Only in 3DLDF-2.0.2/examples: hyprb_01.ps
Only in 3DLDF-2.0.2/examples: hyprb_02.pdf
Only in 3DLDF-2.0.2/examples: hyprb_02.ps
diff -rc2P 3DLDF-2.0.2/examples/hyprb_05.ldf 3DLDF-2.0.3/examples/hyprb_05.ldf
*** 3DLDF-2.0.2/examples/hyprb_05.ldf	Mon Nov  4 18:00:45 2013
--- 3DLDF-2.0.3/examples/hyprb_05.ldf	Wed Dec 11 19:00:29 2013
***************
*** 76,80 ****
  bool_point_vector bpv;
  
! bpv := (plane) r intersection_points h;
  
  draw r;
--- 76,80 ----
  bool_point_vector bpv;
  
! bpv := get_plane r intersection_points h;
  
  draw r;
Only in 3DLDF-2.0.2/examples: intrfr_2.pdf
Only in 3DLDF-2.0.2/examples: intrfr_2.ps
Only in 3DLDF-2.0.2/examples: intrfr_3.pdf
Only in 3DLDF-2.0.2/examples: intrfr_3.ps
Only in 3DLDF-2.0.2/examples: intrfr_5.pdf
Only in 3DLDF-2.0.2/examples: intrfr_5.ps
Only in 3DLDF-2.0.2/examples: intrfr_6.pdf
Only in 3DLDF-2.0.2/examples: intrfr_6.ps
Only in 3DLDF-2.0.2/examples: intrfr_7.pdf
Only in 3DLDF-2.0.2/examples: intrfr_7.ps
Only in 3DLDF-2.0.2/examples: kntpoly1.pdf
Only in 3DLDF-2.0.2/examples: kntpoly1.ps
Only in 3DLDF-2.0.2/examples: plyhd_05.ldf
Only in 3DLDF-2.0.2/examples: polyrhyt.pdf
Only in 3DLDF-2.0.2/examples: polyrhyt.ps
Only in 3DLDF-2.0.2/examples: pprcuts.pdf
Only in 3DLDF-2.0.2/examples: pprcuts.ps
Only in 3DLDF-2.0.2/examples: prbla_00.pdf
Only in 3DLDF-2.0.2/examples: prbla_00.ps
Only in 3DLDF-2.0.2/examples: prbla_01.pdf
Only in 3DLDF-2.0.2/examples: prbla_01.ps
Only in 3DLDF-2.0.2/examples: prbla_05.pdf
Only in 3DLDF-2.0.2/examples: prbla_05.ps
Only in 3DLDF-2.0.2/examples: prbla_06.pdf
Only in 3DLDF-2.0.2/examples: prbla_06.ps
Only in 3DLDF-2.0.2/examples: prbla_10.pdf
Only in 3DLDF-2.0.2/examples: prbla_10.ps
Only in 3DLDF-2.0.2/examples: prbla_11.pdf
Only in 3DLDF-2.0.2/examples: prbla_11.ps
Only in 3DLDF-2.0.2/examples: prbla_12.pdf
Only in 3DLDF-2.0.2/examples: prbla_12.ps
diff -rc2P 3DLDF-2.0.2/examples/rhmtrc_01.ldf 3DLDF-2.0.3/examples/rhmtrc_01.ldf
*** 3DLDF-2.0.2/examples/rhmtrc_01.ldf	Sun Nov 10 16:09:25 2013
--- 3DLDF-2.0.3/examples/rhmtrc_01.ldf	Wed Dec 11 19:00:29 2013
***************
*** 562,570 ****
  endfor;
  
- 
- 
- 
- 
- 
  %% **** (4) End of figure 2
  
--- 562,565 ----
Only in 3DLDF-2.0.2/examples: rhmtrc_01.pdf
Only in 3DLDF-2.0.2/examples: rhmtrc_01.ps
Only in 3DLDF-2.0.2/examples: ripple_1.pdf
Only in 3DLDF-2.0.2/examples: ripple_1.ps
Only in 3DLDF-2.0.2/examples: ripple_2.pdf
Only in 3DLDF-2.0.2/examples: ripple_2.ps
Only in 3DLDF-2.0.2/examples: sphrmd01.pdf
Only in 3DLDF-2.0.2/examples: sphrmd01.ps
Only in 3DLDF-2.0.2/examples: sphrmd02.pdf
Only in 3DLDF-2.0.2/examples: sphrmd02.ps
Only in 3DLDF-2.0.2/examples: sphrmd03.pdf
Only in 3DLDF-2.0.2/examples: sphrmd03.ps
Only in 3DLDF-2.0.2/examples: stgrddc1.pdf
Only in 3DLDF-2.0.2/examples: stgrddc1.ps
Only in 3DLDF-2.0.2/examples: stlltn01.pdf
Only in 3DLDF-2.0.2/examples: stlltn01.ps
Only in 3DLDF-2.0.2/examples: stlltn02.pdf
Only in 3DLDF-2.0.2/examples: stlltn02.ps
Only in 3DLDF-2.0.2/examples: stlltn04.pdf
Only in 3DLDF-2.0.2/examples: stlltn04.ps
Only in 3DLDF-2.0.2/examples: stlltns.pdf
Only in 3DLDF-2.0.2/examples: stlltns.ps
Only in 3DLDF-2.0.2/examples: strspr01.pdf
Only in 3DLDF-2.0.2/examples: strspr01.ps
Only in 3DLDF-2.0.2/examples: sundl_01.pdf
Only in 3DLDF-2.0.2/examples: sundl_01.ps
Only in 3DLDF-2.0.2/examples: sundl_02.pdf
Only in 3DLDF-2.0.2/examples: sundl_02.ps
Only in 3DLDF-2.0.2/examples: sundl_03.pdf
Only in 3DLDF-2.0.2/examples: sundl_03.ps
Only in 3DLDF-2.0.2/examples: tngnts_1.pdf
Only in 3DLDF-2.0.2/examples: tngnts_1.ps
Only in 3DLDF-2.0.2/examples: trchd_1.pdf
Only in 3DLDF-2.0.2/examples: trchd_1.ps
Only in 3DLDF-2.0.2/examples: wave_1.pdf
Only in 3DLDF-2.0.2/examples: wave_1.ps
Only in 3DLDF-2.0.2/examples: wave_2.pdf
Only in 3DLDF-2.0.2/examples: wave_2.ps
diff -rc2P 3DLDF-2.0.2/reconfig.sh 3DLDF-2.0.3/reconfig.sh
*** 3DLDF-2.0.2/reconfig.sh	Sun Nov 10 18:28:10 2013
--- 3DLDF-2.0.3/reconfig.sh	Fri Dec 13 16:20:17 2013
***************
*** 31,35 ****
  #####    --prefix=`pwd` $CONF_STATIC LIBS="-lgsl -lgslcblas -lm"
  
! configure --prefix=`pwd` $CONF_STATIC LIBS="-lgsl -lgslcblas -lm"
  
  if test $# -gt 1
--- 31,41 ----
  #####    --prefix=`pwd` $CONF_STATIC LIBS="-lgsl -lgslcblas -lm"
  
! 
! #### configure CPPFLAGS="-I/home/lfinsto/glibc-install/include" \
! #### LDFLAGS="-L/home/lfinsto/glibc-install/lib64 -L/home/lfinsto/glibc-install/lib64 
! #### -L/home/lfinsto/gcc-4.8.2/lib64/../lib64" \
! ##### --prefix=`pwd` $CONF_STATIC LIBS="-lgsl -lgslcblas -lm"
! 
! ./configure --prefix=`pwd` $CONF_STATIC LIBS="-lgsl -lgslcblas -lm"
  
  if test $# -gt 1
diff -rc2P 3DLDF-2.0.2/src/Makefile.am 3DLDF-2.0.3/src/Makefile.am
*** 3DLDF-2.0.2/src/Makefile.am	Sun Nov 10 14:20:53 2013
--- 3DLDF-2.0.3/src/Makefile.am	Fri Dec 13 12:34:39 2013
***************
*** 69,73 ****
  bin_PROGRAMS = dummy$(EXEEXT) prbsnflx$(EXEEXT) 3dldf$(EXEEXT) 
  
! lib_LTLIBRARIES = lib3dldflb.la lib3dldfsp.la
  
  # colall.web intro.web
--- 69,75 ----
  bin_PROGRAMS = dummy$(EXEEXT) prbsnflx$(EXEEXT) 3dldf$(EXEEXT) 
  
! # lib3dldfsp.la
! 
! lib_LTLIBRARIES = lib3dldflb.la 
  
  # colall.web intro.web
***************
*** 97,110 ****
  
  
! 3dldfsp_CWEB_files = parser2.web scanner2.web 
  
- 3dldfsp_c_files = $(3dldfsp_CWEB_files:.web=.c)
- 3dldfsp_cpp_files = $(3dldfsp_CWEB_files:.web=.c++) 
- 3dldfsp_h_files = $(3dldfsp_CWEB_files:.web=.h) 
- 3dldfsp_hpp_files = $(3dldfsp_CWEB_files:.web=.h++) parser_1.h++
- 3dldfsp_obj_files = $(3dldfsp_CWEB_files:.web=.o)
- 3dldfsp_lo_files = $(3dldfsp_CWEB_files:.web=.lo)
  
! 3dldf_LDADD = lib3dldflb.la lib3dldfsp.la
  
  
--- 99,113 ----
  
  
! # 3dldfsp_CWEB_files = parser2.web scanner2.web 
! 
! # 3dldfsp_c_files = $(3dldfsp_CWEB_files:.web=.c)
! # 3dldfsp_cpp_files = $(3dldfsp_CWEB_files:.web=.c++) 
! # 3dldfsp_h_files = $(3dldfsp_CWEB_files:.web=.h) 
! # 3dldfsp_hpp_files = $(3dldfsp_CWEB_files:.web=.h++) parser_1.h++
! # 3dldfsp_obj_files = $(3dldfsp_CWEB_files:.web=.o)
! # 3dldfsp_lo_files = $(3dldfsp_CWEB_files:.web=.lo)
  
  
! 3dldf_LDADD = lib3dldflb.la # lib3dldfsp.la
  
  
***************
*** 158,161 ****
--- 161,166 ----
  dummy_SOURCES = dummy.cxx
  
+ # $(3dldfsp_CWEB_files) 
+ 
  EXTRA_DIST = check_scan_parse_output.sh \
               cpyrtcpp.txt cpyrtasc.txt cpyrtcpp.txt cpyrtc.txt cpyrtel.txt \
***************
*** 164,169 ****
               sample.ldf sample0.ldf sample1.ldf sample2.ldf \
               3DLDFmp.mp 3DLDFtex.bas 3DLDFtex.tex \
!              $(3dldflb_CWEB_files) $(3dldfsp_CWEB_files) $(3dldf_SOURCES) \
!              $(3dldf_PARSER_FILES)
  
  CLEANFILES := $(3dldf_c_files) $(3dldf_cpp_files) $(3dldf_hpp_files) $(3dldf_h_files) \
--- 169,177 ----
               sample.ldf sample0.ldf sample1.ldf sample2.ldf \
               3DLDFmp.mp 3DLDFtex.bas 3DLDFtex.tex \
!              $(3dldflb_CWEB_files) $(3dldf_SOURCES) \
!              $(3dldf_PARSER_FILES) scanner2.web parser2.web
! 
! 
! # scanner2.c++ scanner2.h++ scanner2.l++ parser2.y++ 
  
  CLEANFILES := $(3dldf_c_files) $(3dldf_cpp_files) $(3dldf_hpp_files) $(3dldf_h_files) \
***************
*** 173,178 ****
                loader.c loader.c++ loader.h loader.h++ \
                parser.c parser.c++ parser_1.h++ parser.h++  parser.output parser.y++ \
!               prbsnflx.c++ examples.h layers.h layers.h++ parser.h++ parser2.y++ parser.y++ \
!               scanner2.c++ scanner2.h++ ldf_1.log scanner2.l++
   
  # AM_CXXFLAGS =
--- 181,186 ----
                loader.c loader.c++ loader.h loader.h++ \
                parser.c parser.c++ parser_1.h++ parser.h++  parser.output parser.y++ \
!               prbsnflx.c++ examples.h layers.h layers.h++ parser.h++ parser.y++ \
!               ldf_1.log 
   
  # AM_CXXFLAGS =
***************
*** 185,190 ****
  .PHONY : touch
  
  touch:
! 	touch 3dldf$(EXEEXT) $(3dldf_obj_files) $(3dldflb_obj_files) $(3dldfsp_obj_files) \
                 $(3dldf_LDADD)
  
--- 193,200 ----
  .PHONY : touch
  
+ # $(3dldfsp_obj_files) 
+ 
  touch:
! 	touch 3dldf$(EXEEXT) $(3dldf_obj_files) $(3dldflb_obj_files) \
                 $(3dldf_LDADD)
  
***************
*** 192,207 ****
  	touch $@
  
! lib3dldfsp.c:
! 	touch $@
  
  dist-hook:
! 	rm ./lib3dldflb.c ./lib3dldfsp.c
  
  #### *** (3) Link 3dldf
  
  3dldf$(EXEEXT): $(3dldf_obj_files) $(3dldf_LDADD) 
  	@echo "Linking 3dldf"
  	$(CXXLINK) $(3dldf_obj_files) -pthread $(3dldf_LDADD) $(LIBS)
! 	@touch $(3dldf_obj_files) $(3dldflb_obj_files) $(3dldfsp_obj_files) \
                 $(3dldf_LDADD) 3dldf$(EXEEXT) 
  
--- 202,219 ----
  	touch $@
  
! # lib3dldfsp.c:
! # 	touch $@
  
  dist-hook:
! 	rm ./lib3dldflb.c # ./lib3dldfsp.c
  
  #### *** (3) Link 3dldf
  
+ # $(3dldfsp_obj_files)
+ 
  3dldf$(EXEEXT): $(3dldf_obj_files) $(3dldf_LDADD) 
  	@echo "Linking 3dldf"
  	$(CXXLINK) $(3dldf_obj_files) -pthread $(3dldf_LDADD) $(LIBS)
! 	@touch $(3dldf_obj_files) $(3dldflb_obj_files)  \
                 $(3dldf_LDADD) 3dldf$(EXEEXT) 
  
***************
*** 209,214 ****
  	$(CXXLINK) -rpath $(libdir) $(3dldflb_lo_files) $(LIBS)
  
! lib3dldfsp.la: $(3dldfsp_hpp_files) $(3dldf_hpp_files) $(3dldfsp_lo_files) 
! 	$(CXXLINK) -rpath $(libdir) $(3dldfsp_lo_files) $(LIBS)
  
  
--- 221,226 ----
  	$(CXXLINK) -rpath $(libdir) $(3dldflb_lo_files) $(LIBS)
  
! # lib3dldfsp.la: $(3dldfsp_hpp_files) $(3dldf_hpp_files) $(3dldfsp_lo_files) 
! # 	$(CXXLINK) -rpath $(libdir) $(3dldfsp_lo_files) $(LIBS)
  
  
***************
*** 288,292 ****
  #### *** (3) parser
  
! parser.y++: parser.w prbsnflx$(EXEEXT) $(3dldf_PARSER_FILES)
  	ctangle $<
  	./prbsnflx$(EXEEXT) parser.c parser.y
--- 300,304 ----
  #### *** (3) parser
  
! parser.y++ parser_1.h++: parser.w prbsnflx$(EXEEXT) $(3dldf_PARSER_FILES)
  	ctangle $<
  	./prbsnflx$(EXEEXT) parser.c parser.y
***************
*** 295,299 ****
  	touch $@
  
! parser.c++ parser.h++ parser_1.h++: parser.y++ 
  	$(YACC) --debug -d -o parser.cxx $<
  	./check_scan_parse_output.sh parser.cxx parser.c++
--- 307,312 ----
  	touch $@
  
! 
! parser.c++ parser.h++: parser.y++ 
  	$(YACC) --debug -d -o parser.cxx $<
  	./check_scan_parse_output.sh parser.cxx parser.c++
***************
*** 317,371 ****
  	@echo "Compiling 'parser.c++'.  This may take awhile ... "
  	$(CXXCOMPILE) -c -o $@ $<
- 	touch $@
- 
  
  #### *** (3) parser2
  
! parser2.y++ : parser2.web prbsnflx$(EXEEXT) $(3dldf_PARSER2_FILES)
! 	ctangle $<
! 	./prbsnflx$(EXEEXT) parser2.c parser2.y
! 	rm parser2.c
! 	./check_scan_parse_output.sh parser2.y parser2.y++
! 	@touch $@
! 
! parser2.c++ parser2.h++ : parser2.y++ 
! 	$(YACC) --debug -d -o parser2.cxx $<
! 	./check_scan_parse_output.sh parser2.cxx parser2.c++
! 	./check_scan_parse_output.sh parser2.hxx parser2.h++
! 	@touch $@
! 
! parser2.o: parser2.c++ parser2.h++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ \
!                      complex.h++ cones.h++ conicsct.h++ crclslc.h++ \
!                      creatnew.h++ cuboid.h++ curves.h++ cylinder.h++ \
!                      dashptrn.h++ ddchdrn.h++ ellipses.h++ ellpsoid.h++ \
!                      ellpsslc.h++ glyphs.h++ gsltmplt.h++ helices.h++ \
!                      hyprbola.h++ io.h++ lines.h++ matrices.h++ nurbs.h++ \
!                      origami.h++ parabola.h++ parabold.h++ paraellp.h++ \
!                      parahypr.h++ paths.h++ pctfncs0.h++ pens.h++ pictures.h++ \
!                      planes.h++ plyhdslc.h++ pntrvcf0.h++ pntrvctr.h++ \
!                      points.h++ polygons.h++ polyhed.h++ predctes.h++ \
!                      primes.h++ pspglb.h++ rectangs.h++ rhtchdrn.h++ \
!                      scanprse.h++ shapes.h++ solfaced.h++ solids.h++ \
!                      spheres.h++ sphrdevl.h++ transfor.h++ triangle.h++ \
!                      utility.h++
! 	$(CXXCOMPILE) -c -o $@ $<
! 	@touch $@
! 
! scanner2.o: scanner2.c++ scanner2.h++ io.h++  loader.h++ parser2.h++ pspglb.h++
! 	$(CXXCOMPILE) -c -o $@ $<
! 	@touch $@
! 
! scanner2.c++ scanner2.h++ : scanner2.l++ 
! 	$(LEX) -o scanner2.cxx $<
! 	./check_scan_parse_output.sh scanner2.cxx scanner2.c++
! 	./check_scan_parse_output.sh scanner2.hxx scanner2.h++
! 	@touch $@
! 
! scanner2.l++ : scanner2.web prbsnflx$(EXEEXT)
! 	ctangle scanner2.web
! 	./prbsnflx$(EXEEXT) scanner2.c scanner2.l
! 	rm scanner2.c
! 	./check_scan_parse_output.sh scanner2.l scanner2.l++
! 	@touch $@
  
  prbsnflx$(EXEEXT): prbsnflx.c++ 
--- 330,382 ----
  	@echo "Compiling 'parser.c++'.  This may take awhile ... "
  	$(CXXCOMPILE) -c -o $@ $<
  
  #### *** (3) parser2
  
! # parser2.y++ : parser2.web prbsnflx$(EXEEXT) $(3dldf_PARSER2_FILES)
! # 	ctangle $<
! # 	./prbsnflx$(EXEEXT) parser2.c parser2.y
! # 	rm parser2.c
! # 	./check_scan_parse_output.sh parser2.y parser2.y++
! # 	@touch $@
! 
! # parser2.c++ parser2.h++ : parser2.y++ 
! # 	$(YACC) --debug -d -o parser2.cxx $<
! # 	./check_scan_parse_output.sh parser2.cxx parser2.c++
! # 	./check_scan_parse_output.sh parser2.hxx parser2.h++
! # 	@touch $@
! 
! # parser2.o: parser2.c++ parser2.h++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ \
! #                      complex.h++ cones.h++ conicsct.h++ crclslc.h++ \
! #                      creatnew.h++ cuboid.h++ curves.h++ cylinder.h++ \
! #                      dashptrn.h++ ddchdrn.h++ ellipses.h++ ellpsoid.h++ \
! #                      ellpsslc.h++ glyphs.h++ gsltmplt.h++ helices.h++ \
! #                      hyprbola.h++ io.h++ lines.h++ matrices.h++ nurbs.h++ \
! #                      origami.h++ parabola.h++ parabold.h++ paraellp.h++ \
! #                      parahypr.h++ paths.h++ pctfncs0.h++ pens.h++ pictures.h++ \
! #                      planes.h++ plyhdslc.h++ pntrvcf0.h++ pntrvctr.h++ \
! #                      points.h++ polygons.h++ polyhed.h++ predctes.h++ \
! #                      primes.h++ pspglb.h++ rectangs.h++ rhtchdrn.h++ \
! #                      scanprse.h++ shapes.h++ solfaced.h++ solids.h++ \
! #                      spheres.h++ sphrdevl.h++ transfor.h++ triangle.h++ \
! #                      utility.h++
! # 	$(CXXCOMPILE) -c -o $@ $<
! # 	@touch $@
! 
! # scanner2.o: scanner2.c++ scanner2.h++ io.h++  loader.h++ parser2.h++ pspglb.h++
! # 	$(CXXCOMPILE) -c -o $@ $<
! # 	@touch $@
! 
! # scanner2.c++ scanner2.h++ : scanner2.l++ 
! # 	$(LEX) -o scanner2.cxx $<
! # 	./check_scan_parse_output.sh scanner2.cxx scanner2.c++
! # 	./check_scan_parse_output.sh scanner2.hxx scanner2.h++
! # 	@touch $@
! 
! # scanner2.l++ : scanner2.web prbsnflx$(EXEEXT)
! # 	ctangle scanner2.web
! # 	./prbsnflx$(EXEEXT) scanner2.c scanner2.l
! # 	rm scanner2.c
! # 	./check_scan_parse_output.sh scanner2.l scanner2.l++
! # 	@touch $@
  
  prbsnflx$(EXEEXT): prbsnflx.c++ 
***************
*** 382,386 ****
  #### *** (3) 
  
! main.o: main.c++ $(3dldf_hpp_files) parser.h++ parser2.h++ parser_1.h++
  
  arc.o: arc.c++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ conicsct.h++ crclslc.h++ \
--- 393,399 ----
  #### *** (3) 
  
! # parser2.h++ 
! 
! main.o: main.c++ $(3dldf_hpp_files) parser.h++ parser_1.h++
  
  arc.o: arc.c++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ conicsct.h++ crclslc.h++ \
***************
*** 913,920 ****
  
  .PHONY : run
! run: 
! 	$(MAKE) 3dldf$(EXEEXT) && 3dldf$(EXEEXT) sample2.ldf \
!            && mpost 3DLDFmp.mp && tex 3DLDFtex.tex \
!            && dvips -o 3DLDFtex.ps 3DLDFtex.dvi 
  
  3DLDFtex.pdf.gz : 3DLDFtex.pdf
--- 926,934 ----
  
  .PHONY : run
! run: 3dldf$(EXEEXT)
! 	touch sample2.ldf
! 	-rm 3DLDFtex.dvi 3DLDFtex.ps
! 	$(MAKE) 3DLDFtex.ps
! 
  
  3DLDFtex.pdf.gz : 3DLDFtex.pdf
diff -rc2P 3DLDF-2.0.2/src/Makefile.in 3DLDF-2.0.3/src/Makefile.in
*** 3DLDF-2.0.2/src/Makefile.in	Sun Nov 10 18:30:13 2013
--- 3DLDF-2.0.3/src/Makefile.in	Fri Dec 13 12:34:58 2013
***************
*** 191,201 ****
  am__v_lt_0 = --silent
  am__v_lt_1 = 
- lib3dldfsp_la_LIBADD =
- lib3dldfsp_la_SOURCES = lib3dldfsp.c
- lib3dldfsp_la_OBJECTS = lib3dldfsp.lo
  PROGRAMS = $(bin_PROGRAMS)
  am_3dldf_OBJECTS =
  3dldf_OBJECTS = $(am_3dldf_OBJECTS)
! 3dldf_DEPENDENCIES = lib3dldflb.la lib3dldfsp.la
  am_dummy_OBJECTS = dummy.$(OBJEXT)
  dummy_OBJECTS = $(am_dummy_OBJECTS)
--- 191,198 ----
  am__v_lt_0 = --silent
  am__v_lt_1 = 
  PROGRAMS = $(bin_PROGRAMS)
  am_3dldf_OBJECTS =
  3dldf_OBJECTS = $(am_3dldf_OBJECTS)
! 3dldf_DEPENDENCIES = lib3dldflb.la
  am_dummy_OBJECTS = dummy.$(OBJEXT)
  dummy_OBJECTS = $(am_dummy_OBJECTS)
***************
*** 264,271 ****
  am__v_LEX_1 = 
  YLWRAP = $(top_srcdir)/ylwrap
! SOURCES = lib3dldflb.c lib3dldfsp.c $(3dldf_SOURCES) $(dummy_SOURCES) \
  	$(prbsnflx_SOURCES)
- DIST_SOURCES = lib3dldflb.c lib3dldfsp.c $(3dldf_SOURCES) \
- 	$(dummy_SOURCES) $(prbsnflx_SOURCES)
  am__can_run_installinfo = \
    case $$AM_UPDATE_INFO_DIR in \
--- 261,268 ----
  am__v_LEX_1 = 
  YLWRAP = $(top_srcdir)/ylwrap
! SOURCES = lib3dldflb.c $(3dldf_SOURCES) $(dummy_SOURCES) \
! 	$(prbsnflx_SOURCES)
! DIST_SOURCES = lib3dldflb.c $(3dldf_SOURCES) $(dummy_SOURCES) \
  	$(prbsnflx_SOURCES)
  am__can_run_installinfo = \
    case $$AM_UPDATE_INFO_DIR in \
***************
*** 424,428 ****
  top_srcdir = @top_srcdir@
  bin_PROGRAMS = dummy$(EXEEXT) prbsnflx$(EXEEXT) 3dldf$(EXEEXT) 
! lib_LTLIBRARIES = lib3dldflb.la lib3dldfsp.la
  
  # colall.web intro.web
--- 421,427 ----
  top_srcdir = @top_srcdir@
  bin_PROGRAMS = dummy$(EXEEXT) prbsnflx$(EXEEXT) 3dldf$(EXEEXT) 
! 
! # lib3dldfsp.la
! lib_LTLIBRARIES = lib3dldflb.la 
  
  # colall.web intro.web
***************
*** 448,459 ****
  3dldflb_lo_files = $(3dldflb_CWEB_files:.web=.lo)
  3dldflb_obj_files = $(3dldflb_CWEB_files:.web=.o)
! 3dldfsp_CWEB_files = parser2.web scanner2.web 
! 3dldfsp_c_files = $(3dldfsp_CWEB_files:.web=.c)
! 3dldfsp_cpp_files = $(3dldfsp_CWEB_files:.web=.c++) 
! 3dldfsp_h_files = $(3dldfsp_CWEB_files:.web=.h) 
! 3dldfsp_hpp_files = $(3dldfsp_CWEB_files:.web=.h++) parser_1.h++
! 3dldfsp_obj_files = $(3dldfsp_CWEB_files:.web=.o)
! 3dldfsp_lo_files = $(3dldfsp_CWEB_files:.web=.lo)
! 3dldf_LDADD = lib3dldflb.la lib3dldfsp.la
  3dldf_SOURCES = main.web pspglb.web 
  3dldf_cpp_files = $(3dldf_SOURCES:.web=.c++)
--- 447,460 ----
  3dldflb_lo_files = $(3dldflb_CWEB_files:.web=.lo)
  3dldflb_obj_files = $(3dldflb_CWEB_files:.web=.o)
! 
! # 3dldfsp_CWEB_files = parser2.web scanner2.web 
! 
! # 3dldfsp_c_files = $(3dldfsp_CWEB_files:.web=.c)
! # 3dldfsp_cpp_files = $(3dldfsp_CWEB_files:.web=.c++) 
! # 3dldfsp_h_files = $(3dldfsp_CWEB_files:.web=.h) 
! # 3dldfsp_hpp_files = $(3dldfsp_CWEB_files:.web=.h++) parser_1.h++
! # 3dldfsp_obj_files = $(3dldfsp_CWEB_files:.web=.o)
! # 3dldfsp_lo_files = $(3dldfsp_CWEB_files:.web=.lo)
! 3dldf_LDADD = lib3dldflb.la # lib3dldfsp.la
  3dldf_SOURCES = main.web pspglb.web 
  3dldf_cpp_files = $(3dldf_SOURCES:.web=.c++)
***************
*** 499,502 ****
--- 500,505 ----
  prbsnflx_SOURCES = prbsnflx.l++
  dummy_SOURCES = dummy.cxx
+ 
+ # $(3dldfsp_CWEB_files) 
  EXTRA_DIST = check_scan_parse_output.sh \
               cpyrtcpp.txt cpyrtasc.txt cpyrtcpp.txt cpyrtc.txt cpyrtel.txt \
***************
*** 505,511 ****
               sample.ldf sample0.ldf sample1.ldf sample2.ldf \
               3DLDFmp.mp 3DLDFtex.bas 3DLDFtex.tex \
!              $(3dldflb_CWEB_files) $(3dldfsp_CWEB_files) $(3dldf_SOURCES) \
!              $(3dldf_PARSER_FILES)
  
  CLEANFILES := $(3dldf_c_files) $(3dldf_cpp_files) $(3dldf_hpp_files) $(3dldf_h_files) \
                $(3dldf_OBJECTS) $(3dldf_rpo_files) \
--- 508,516 ----
               sample.ldf sample0.ldf sample1.ldf sample2.ldf \
               3DLDFmp.mp 3DLDFtex.bas 3DLDFtex.tex \
!              $(3dldflb_CWEB_files) $(3dldf_SOURCES) \
!              $(3dldf_PARSER_FILES) scanner2.web parser2.web
! 
  
+ # scanner2.c++ scanner2.h++ scanner2.l++ parser2.y++ 
  CLEANFILES := $(3dldf_c_files) $(3dldf_cpp_files) $(3dldf_hpp_files) $(3dldf_h_files) \
                $(3dldf_OBJECTS) $(3dldf_rpo_files) \
***************
*** 514,519 ****
                loader.c loader.c++ loader.h loader.h++ \
                parser.c parser.c++ parser_1.h++ parser.h++  parser.output parser.y++ \
!               prbsnflx.c++ examples.h layers.h layers.h++ parser.h++ parser2.y++ parser.y++ \
!               scanner2.c++ scanner2.h++ ldf_1.log scanner2.l++
  
  all: all-am
--- 519,524 ----
                loader.c loader.c++ loader.h loader.h++ \
                parser.c parser.c++ parser_1.h++ parser.h++  parser.output parser.y++ \
!               prbsnflx.c++ examples.h layers.h layers.h++ parser.h++ parser.y++ \
!               ldf_1.log 
  
  all: all-am
***************
*** 648,652 ****
  @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/dummy.Po@am__quote@
  @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lib3dldflb.Plo@am__quote@
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/lib3dldfsp.Plo@am__quote@
  @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/prbsnflx.Po@am__quote@
  
--- 653,656 ----
***************
*** 947,952 ****
  .PHONY : touch
  
  touch:
! 	touch 3dldf$(EXEEXT) $(3dldf_obj_files) $(3dldflb_obj_files) $(3dldfsp_obj_files) \
                 $(3dldf_LDADD)
  
--- 951,958 ----
  .PHONY : touch
  
+ # $(3dldfsp_obj_files) 
+ 
  touch:
! 	touch 3dldf$(EXEEXT) $(3dldf_obj_files) $(3dldflb_obj_files) \
                 $(3dldf_LDADD)
  
***************
*** 954,969 ****
  	touch $@
  
! lib3dldfsp.c:
! 	touch $@
  
  dist-hook:
! 	rm ./lib3dldflb.c ./lib3dldfsp.c
  
  #### *** (3) Link 3dldf
  
  3dldf$(EXEEXT): $(3dldf_obj_files) $(3dldf_LDADD) 
  	@echo "Linking 3dldf"
  	$(CXXLINK) $(3dldf_obj_files) -pthread $(3dldf_LDADD) $(LIBS)
! 	@touch $(3dldf_obj_files) $(3dldflb_obj_files) $(3dldfsp_obj_files) \
                 $(3dldf_LDADD) 3dldf$(EXEEXT) 
  
--- 960,977 ----
  	touch $@
  
! # lib3dldfsp.c:
! # 	touch $@
  
  dist-hook:
! 	rm ./lib3dldflb.c # ./lib3dldfsp.c
  
  #### *** (3) Link 3dldf
  
+ # $(3dldfsp_obj_files)
+ 
  3dldf$(EXEEXT): $(3dldf_obj_files) $(3dldf_LDADD) 
  	@echo "Linking 3dldf"
  	$(CXXLINK) $(3dldf_obj_files) -pthread $(3dldf_LDADD) $(LIBS)
! 	@touch $(3dldf_obj_files) $(3dldflb_obj_files)  \
                 $(3dldf_LDADD) 3dldf$(EXEEXT) 
  
***************
*** 971,976 ****
  	$(CXXLINK) -rpath $(libdir) $(3dldflb_lo_files) $(LIBS)
  
! lib3dldfsp.la: $(3dldfsp_hpp_files) $(3dldf_hpp_files) $(3dldfsp_lo_files) 
! 	$(CXXLINK) -rpath $(libdir) $(3dldfsp_lo_files) $(LIBS)
  
  #### The following implicit (pattern) rule generates C++ source code and header files 
--- 979,984 ----
  	$(CXXLINK) -rpath $(libdir) $(3dldflb_lo_files) $(LIBS)
  
! # lib3dldfsp.la: $(3dldfsp_hpp_files) $(3dldf_hpp_files) $(3dldfsp_lo_files) 
! # 	$(CXXLINK) -rpath $(libdir) $(3dldfsp_lo_files) $(LIBS)
  
  #### The following implicit (pattern) rule generates C++ source code and header files 
***************
*** 1044,1048 ****
  #### *** (3) parser
  
! parser.y++: parser.w prbsnflx$(EXEEXT) $(3dldf_PARSER_FILES)
  	ctangle $<
  	./prbsnflx$(EXEEXT) parser.c parser.y
--- 1052,1056 ----
  #### *** (3) parser
  
! parser.y++ parser_1.h++: parser.w prbsnflx$(EXEEXT) $(3dldf_PARSER_FILES)
  	ctangle $<
  	./prbsnflx$(EXEEXT) parser.c parser.y
***************
*** 1051,1055 ****
  	touch $@
  
! parser.c++ parser.h++ parser_1.h++: parser.y++ 
  	$(YACC) --debug -d -o parser.cxx $<
  	./check_scan_parse_output.sh parser.cxx parser.c++
--- 1059,1063 ----
  	touch $@
  
! parser.c++ parser.h++: parser.y++ 
  	$(YACC) --debug -d -o parser.cxx $<
  	./check_scan_parse_output.sh parser.cxx parser.c++
***************
*** 1073,1126 ****
  	@echo "Compiling 'parser.c++'.  This may take awhile ... "
  	$(CXXCOMPILE) -c -o $@ $<
- 	touch $@
  
  #### *** (3) parser2
  
! parser2.y++ : parser2.web prbsnflx$(EXEEXT) $(3dldf_PARSER2_FILES)
! 	ctangle $<
! 	./prbsnflx$(EXEEXT) parser2.c parser2.y
! 	rm parser2.c
! 	./check_scan_parse_output.sh parser2.y parser2.y++
! 	@touch $@
! 
! parser2.c++ parser2.h++ : parser2.y++ 
! 	$(YACC) --debug -d -o parser2.cxx $<
! 	./check_scan_parse_output.sh parser2.cxx parser2.c++
! 	./check_scan_parse_output.sh parser2.hxx parser2.h++
! 	@touch $@
! 
! parser2.o: parser2.c++ parser2.h++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ \
!                      complex.h++ cones.h++ conicsct.h++ crclslc.h++ \
!                      creatnew.h++ cuboid.h++ curves.h++ cylinder.h++ \
!                      dashptrn.h++ ddchdrn.h++ ellipses.h++ ellpsoid.h++ \
!                      ellpsslc.h++ glyphs.h++ gsltmplt.h++ helices.h++ \
!                      hyprbola.h++ io.h++ lines.h++ matrices.h++ nurbs.h++ \
!                      origami.h++ parabola.h++ parabold.h++ paraellp.h++ \
!                      parahypr.h++ paths.h++ pctfncs0.h++ pens.h++ pictures.h++ \
!                      planes.h++ plyhdslc.h++ pntrvcf0.h++ pntrvctr.h++ \
!                      points.h++ polygons.h++ polyhed.h++ predctes.h++ \
!                      primes.h++ pspglb.h++ rectangs.h++ rhtchdrn.h++ \
!                      scanprse.h++ shapes.h++ solfaced.h++ solids.h++ \
!                      spheres.h++ sphrdevl.h++ transfor.h++ triangle.h++ \
!                      utility.h++
! 	$(CXXCOMPILE) -c -o $@ $<
! 	@touch $@
! 
! scanner2.o: scanner2.c++ scanner2.h++ io.h++  loader.h++ parser2.h++ pspglb.h++
! 	$(CXXCOMPILE) -c -o $@ $<
! 	@touch $@
! 
! scanner2.c++ scanner2.h++ : scanner2.l++ 
! 	$(LEX) -o scanner2.cxx $<
! 	./check_scan_parse_output.sh scanner2.cxx scanner2.c++
! 	./check_scan_parse_output.sh scanner2.hxx scanner2.h++
! 	@touch $@
! 
! scanner2.l++ : scanner2.web prbsnflx$(EXEEXT)
! 	ctangle scanner2.web
! 	./prbsnflx$(EXEEXT) scanner2.c scanner2.l
! 	rm scanner2.c
! 	./check_scan_parse_output.sh scanner2.l scanner2.l++
! 	@touch $@
  
  prbsnflx$(EXEEXT): prbsnflx.c++ 
--- 1081,1133 ----
  	@echo "Compiling 'parser.c++'.  This may take awhile ... "
  	$(CXXCOMPILE) -c -o $@ $<
  
  #### *** (3) parser2
  
! # parser2.y++ : parser2.web prbsnflx$(EXEEXT) $(3dldf_PARSER2_FILES)
! # 	ctangle $<
! # 	./prbsnflx$(EXEEXT) parser2.c parser2.y
! # 	rm parser2.c
! # 	./check_scan_parse_output.sh parser2.y parser2.y++
! # 	@touch $@
! 
! # parser2.c++ parser2.h++ : parser2.y++ 
! # 	$(YACC) --debug -d -o parser2.cxx $<
! # 	./check_scan_parse_output.sh parser2.cxx parser2.c++
! # 	./check_scan_parse_output.sh parser2.hxx parser2.h++
! # 	@touch $@
! 
! # parser2.o: parser2.c++ parser2.h++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ \
! #                      complex.h++ cones.h++ conicsct.h++ crclslc.h++ \
! #                      creatnew.h++ cuboid.h++ curves.h++ cylinder.h++ \
! #                      dashptrn.h++ ddchdrn.h++ ellipses.h++ ellpsoid.h++ \
! #                      ellpsslc.h++ glyphs.h++ gsltmplt.h++ helices.h++ \
! #                      hyprbola.h++ io.h++ lines.h++ matrices.h++ nurbs.h++ \
! #                      origami.h++ parabola.h++ parabold.h++ paraellp.h++ \
! #                      parahypr.h++ paths.h++ pctfncs0.h++ pens.h++ pictures.h++ \
! #                      planes.h++ plyhdslc.h++ pntrvcf0.h++ pntrvctr.h++ \
! #                      points.h++ polygons.h++ polyhed.h++ predctes.h++ \
! #                      primes.h++ pspglb.h++ rectangs.h++ rhtchdrn.h++ \
! #                      scanprse.h++ shapes.h++ solfaced.h++ solids.h++ \
! #                      spheres.h++ sphrdevl.h++ transfor.h++ triangle.h++ \
! #                      utility.h++
! # 	$(CXXCOMPILE) -c -o $@ $<
! # 	@touch $@
! 
! # scanner2.o: scanner2.c++ scanner2.h++ io.h++  loader.h++ parser2.h++ pspglb.h++
! # 	$(CXXCOMPILE) -c -o $@ $<
! # 	@touch $@
! 
! # scanner2.c++ scanner2.h++ : scanner2.l++ 
! # 	$(LEX) -o scanner2.cxx $<
! # 	./check_scan_parse_output.sh scanner2.cxx scanner2.c++
! # 	./check_scan_parse_output.sh scanner2.hxx scanner2.h++
! # 	@touch $@
! 
! # scanner2.l++ : scanner2.web prbsnflx$(EXEEXT)
! # 	ctangle scanner2.web
! # 	./prbsnflx$(EXEEXT) scanner2.c scanner2.l
! # 	rm scanner2.c
! # 	./check_scan_parse_output.sh scanner2.l scanner2.l++
! # 	@touch $@
  
  prbsnflx$(EXEEXT): prbsnflx.c++ 
***************
*** 1136,1140 ****
  #### *** (3) 
  
! main.o: main.c++ $(3dldf_hpp_files) parser.h++ parser2.h++ parser_1.h++
  
  arc.o: arc.c++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ conicsct.h++ crclslc.h++ \
--- 1143,1149 ----
  #### *** (3) 
  
! # parser2.h++ 
! 
! main.o: main.c++ $(3dldf_hpp_files) parser.h++ parser_1.h++
  
  arc.o: arc.c++ arc.h++ circles.h++ cncsctlt.h++ colors.h++ conicsct.h++ crclslc.h++ \
***************
*** 1661,1668 ****
  
  .PHONY : run
! run: 
! 	$(MAKE) 3dldf$(EXEEXT) && 3dldf$(EXEEXT) sample2.ldf \
!            && mpost 3DLDFmp.mp && tex 3DLDFtex.tex \
!            && dvips -o 3DLDFtex.ps 3DLDFtex.dvi 
  
  3DLDFtex.pdf.gz : 3DLDFtex.pdf
--- 1670,1677 ----
  
  .PHONY : run
! run: 3dldf$(EXEEXT)
! 	touch sample2.ldf
! 	-rm 3DLDFtex.dvi 3DLDFtex.ps
! 	$(MAKE) 3DLDFtex.ps
  
  3DLDFtex.pdf.gz : 3DLDFtex.pdf
diff -rc2P 3DLDF-2.0.2/src/arc.web 3DLDF-2.0.3/src/arc.web
*** 3DLDF-2.0.2/src/arc.web	Sun Aug 11 16:36:09 2013
--- 3DLDF-2.0.3/src/arc.web	Thu Dec 12 13:20:41 2013
***************
*** 692,696 ****
  {
  
!     if (center != 0)
         center->shift_times(x, y, z);
  
--- 692,696 ----
  {
  
!     if (center != static_cast<Point*>(0))
         center->shift_times(x, y, z);
  
***************
*** 839,853 ****
        cerr << text << endl;
  
!    if (center == 0)
        cerr << "No `center'." << endl;
     else
        center->show("center:", coords, do_persp, do_apply, f, proj, factor);
  
!    if (focus_0 == 0)
        cerr << "No `focus_0'." << endl;
     else
        focus_0->show("focus_0:", coords, do_persp, do_apply, f, proj, factor);
  
!    if (focus_1 == 0)
        cerr << "No `focus_1'." << endl;
     else
--- 839,853 ----
        cerr << text << endl;
  
!    if (center == static_cast<Point*>(0))
        cerr << "No `center'." << endl;
     else
        center->show("center:", coords, do_persp, do_apply, f, proj, factor);
  
!    if (focus_0 == static_cast<Point*>(0))
        cerr << "No `focus_0'." << endl;
     else
        focus_0->show("focus_0:", coords, do_persp, do_apply, f, proj, factor);
  
!    if (focus_1 == static_cast<Point*>(0))
        cerr << "No `focus_1'." << endl;
     else
diff -rc2P 3DLDF-2.0.2/src/arcexpr.w 3DLDF-2.0.3/src/arcexpr.w
*** 3DLDF-2.0.2/src/arcexpr.w	Wed Nov  6 21:01:19 2013
--- 3DLDF-2.0.3/src/arcexpr.w	Thu Dec 12 13:16:02 2013
***************
*** 85,94 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
    else /* |entry != 0 && entry->object != 0|  */
--- 85,95 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) ||  entry->object == static_cast<void*>(0))
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
    else /* |entry != 0 && entry->object != 0|  */
***************
*** 145,149 ****
        = static_cast<Pointer_Vector<Arc>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == 0|.@> 
  
  @ Error handling:  |pv == 0|.
--- 146,150 ----
        = static_cast<Pointer_Vector<Arc>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == static_cast<Pointer_Vector<Arc>*>(0)|.@> 
  
  @ Error handling:  |pv == 0|.
***************
*** 152,163 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
!       }  /* |if (pv == 0)|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
--- 153,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Arc>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
!       }  /* |if (pv == static_cast<Pointer_Vector<Arc>*>(0))|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
***************
*** 172,176 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 173,177 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/arcvexpr.w 3DLDF-2.0.3/src/arcvexpr.w
*** 3DLDF-2.0.2/src/arcvexpr.w	Wed Nov  6 21:01:18 2013
--- 3DLDF-2.0.3/src/arcvexpr.w	Thu Dec 12 13:19:13 2013
***************
*** 107,116 ****
  @q **** (4) Error handling:  |entry == 0 || entry->object == 0|.@> 
  
! @ Error handling:  |entry == 0 || entry->object == 0|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 107,117 ----
  @q **** (4) Error handling:  |entry == 0 || entry->object == 0|.@> 
  
! @ Error handling:  
! |entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0)|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 129,144 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
! @q **** (4) |!(entry == 0 || entry->object == 0)|.@> 
  
! @ |!(entry == 0 || entry->object == 0)|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
!   else /* |!(entry == 0 || entry->object == 0)|  */
! 
       {
  
--- 130,146 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
! @q **** (4) |!(   entry == static_cast<Id_Map_Entry_Node>(0) 
!                || entry->object == static_cast<void*>(0))|.@> 
  
! @ |!(entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
!   else 
       {
  
***************
*** 151,159 ****
          @=$$@> = static_cast<void*>(pv);                    
  
!      }  /* |else| (|!(entry == 0 || entry->object == 0)|)  */
  
  };
  
- 
  @q ** (2) arc_vector_primary --> LEFT_PARENTHESIS  @>
  @q ** (2) arc_vector_expression  RIGHT_PARENTHESIS.@>
--- 153,160 ----
          @=$$@> = static_cast<void*>(pv);                    
  
!      }  /* |else|  */
  
  };
  
  @q ** (2) arc_vector_primary --> LEFT_PARENTHESIS  @>
  @q ** (2) arc_vector_expression  RIGHT_PARENTHESIS.@>
diff -rc2P 3DLDF-2.0.2/src/check_scan_parse_output.sh 3DLDF-2.0.3/src/check_scan_parse_output.sh
*** 3DLDF-2.0.2/src/check_scan_parse_output.sh	Sun Aug 11 16:32:25 2013
--- 3DLDF-2.0.3/src/check_scan_parse_output.sh	Thu Dec 12 15:41:20 2013
***************
*** 2,6 ****
  
  #### check_scan_parse_output.sh
! #### [...]/Finston/gwrdifpk/src/check_scan_parse_output.sh
  
  #### Created by Laurence D. Finston (LDF) Sun May 19 16:48:34 CEST 2013
--- 2,6 ----
  
  #### check_scan_parse_output.sh
! #### 3DLDF-2.0.3/src/check_scan_parse_output.sh
  
  #### Created by Laurence D. Finston (LDF) Sun May 19 16:48:34 CEST 2013
diff -rc2P 3DLDF-2.0.2/src/circles.web 3DLDF-2.0.3/src/circles.web
*** 3DLDF-2.0.2/src/circles.web	Wed Nov  6 20:53:55 2013
--- 3DLDF-2.0.3/src/circles.web	Thu Dec 12 13:26:50 2013
***************
*** 685,692 ****
    Circle* circle_reflection = static_cast<Circle*>(v);  
  
! @q *** (3) If |circle_reflection == 0|, try to allocate memory @>
! @q *** (3) on the free store for it.                           @> 
  
! @ If |circle_reflection == 0|, try to allocate memory 
  on the free store for it.                            
  \initials{LDF 2004.10.12.}
--- 685,692 ----
    Circle* circle_reflection = static_cast<Circle*>(v);  
  
! @q *** (3) If |circle_reflection == static_cast<Circle*>(0)|, try to allocate memory @>
! @q *** (3) on the free store for it.                                                 @> 
  
! @ If |circle_reflection == static_cast<Circle*>(0)|, try to allocate memory 
  on the free store for it.                            
  \initials{LDF 2004.10.12.}
***************
*** 694,698 ****
  @<Define |Circle| functions@>=
  
!  if (circle_reflection == 0)
   {
    try
--- 694,698 ----
  @<Define |Circle| functions@>=
  
!  if (circle_reflection == static_cast<Circle*>(0))
   {
    try
***************
*** 729,733 ****
  @q *** (3).@> 
  
!   } /* |if (circle_reflection == 0)|  */
  
  @q *** (3) Call |Ellipse::reflect_in|.@> 
--- 729,733 ----
  @q *** (3).@> 
  
!   } /* |if (circle_reflection == static_cast<Circle*>(0))|  */
  
  @q *** (3) Call |Ellipse::reflect_in|.@> 
***************
*** 933,937 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 933,937 ----
  @q ***** (5) Preliminaries.@> 
  
!   volatile bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
***************
*** 1174,1178 ****
     if (DEBUG)
       {
!         cerr << "Exiting Circle::is_circular(). Returning true.\n" << flush;
       }
  #endif /* |DEBUG_COMPILE|  */ 
--- 1174,1178 ----
     if (DEBUG)
       {
!         cerr << "Exiting Circle::is_circular(). Returning true." << endl;
       }
  #endif /* |DEBUG_COMPILE|  */ 
***************
*** 1662,1666 ****
  @<Define |Circle| functions@>=
  
!       if (dist == 0)
          {
  #if DEBUG_COMPILE
--- 1662,1666 ----
  @<Define |Circle| functions@>=
  
!       if (dist == ZERO_REAL)
          {
  #if DEBUG_COMPILE
***************
*** 1777,1781 ****
  @q ****** (6).@> 
  
!         } /* |if (dist == 0)| */
        
  @q ***** (5) |dist > (radius + c.radius)|.@> 
--- 1777,1781 ----
  @q ****** (6).@> 
  
!         } /* |if (dist == ZERO_REAL)| */
        
  @q ***** (5) |dist > (radius + c.radius)|.@> 
***************
*** 2233,2237 ****
            cerr << "ERROR! In Reg_Polygon::in_circle():\n"
                 << "Reg_Polygon is non-planar.\n"
!                << "Returning empty Circle.\n\n" << flush;
            return c;
        }
--- 2233,2237 ----
            cerr << "ERROR! In Reg_Polygon::in_circle():\n"
                 << "Reg_Polygon is non-planar.\n"
!                << "Returning empty Circle." << endl << endl;
            return c;
        }
***************
*** 2241,2245 ****
            cerr << "ERROR! In `Reg_Polygon::in_circle()':\n"
                 << "`Reg_Polygon' has fewer than 3 Points.\n"
!                << "Returning empty `Circle'.\n\n" << flush;
            return c;
        }
--- 2241,2245 ----
            cerr << "ERROR! In `Reg_Polygon::in_circle()':\n"
                 << "`Reg_Polygon' has fewer than 3 Points.\n"
!                << "Returning empty `Circle'." << endl << endl;
            return c;
        }
***************
*** 2345,2349 ****
            cerr << "ERROR! In Reg_Polygon::out_circle():\n"
              << "Reg_Polygon is non-planar.\n"
!               << "Returning empty Circle.\n\n" << flush;
            return c;
        }
--- 2345,2349 ----
            cerr << "ERROR! In Reg_Polygon::out_circle():\n"
              << "Reg_Polygon is non-planar.\n"
!               << "Returning empty Circle." << endl << endl;
            return c;
        }
***************
*** 2352,2356 ****
            cerr << "ERROR! In Reg_Polygon::out_circle():\n"
              << "Reg_Polygon has less than 3 Points.\n"
!               << "Returning empty Circle.\n\n" << flush;
            return c;
        }
--- 2352,2356 ----
            cerr << "ERROR! In Reg_Polygon::out_circle():\n"
              << "Reg_Polygon has less than 3 Points.\n"
!               << "Returning empty Circle." << endl << endl;
            return c;
        }
diff -rc2P 3DLDF-2.0.2/src/cmpxassn.w 3DLDF-2.0.3/src/cmpxassn.w
*** 3DLDF-2.0.2/src/cmpxassn.w	Wed Nov  6 21:02:09 2013
--- 3DLDF-2.0.3/src/cmpxassn.w	Thu Dec 12 14:18:11 2013
***************
*** 135,139 ****
       delete pv;
  
!      @=$$@> = 0;
    }
  
--- 135,139 ----
       delete pv;
  
!      @=$$@> = static_cast<void*>(0);
    }
  
diff -rc2P 3DLDF-2.0.2/src/cmpxexpr.w 3DLDF-2.0.3/src/cmpxexpr.w
*** 3DLDF-2.0.2/src/cmpxexpr.w	Wed Nov  6 21:02:09 2013
--- 3DLDF-2.0.3/src/cmpxexpr.w	Thu Dec 12 14:21:21 2013
***************
*** 86,97 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
!   else /* |entry != 0 && entry->object != 0|  */
  
      @=$$@> = static_cast<void*>(create_new<Complex>(
--- 86,99 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
!   else /* |   entry != static_cast<Id_Map_Entry_Node>(0) 
!            && entry->object != static_cast<void*>(0)|  */
  
      @=$$@> = static_cast<void*>(create_new<Complex>(
***************
*** 146,164 ****
        = static_cast<Pointer_Vector<Complex>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == 0|.@> 
  
! @ Error handling:  |pv == 0|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
!       }  /* |if (pv == 0)|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
--- 148,166 ----
        = static_cast<Pointer_Vector<Complex>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == static_cast<Pointer_Vector<Complex>*>(0)|.@> 
  
! @ Error handling:  |pv == |pv == static_cast<Pointer_Vector<Complex>*>(0)|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Complex>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
!       }  /* |if (pv == static_cast<Pointer_Vector<Complex>*>(0))|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
***************
*** 173,183 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != 0 && pv->ctr > 0|.@> 
  
! @ |pv != 0 && pv->ctr > 0|.  Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.12.02.}
  
--- 175,186 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != static_cast<Pointer_Vector<Complex>*>(0) && pv->ctr > 0|.@> 
  
! @ |pv != static_cast<Pointer_Vector<Complex>*>(0) && pv->ctr > 0|.  
! Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.12.02.}
  
diff -rc2P 3DLDF-2.0.2/src/cmpxvxpr.w 3DLDF-2.0.3/src/cmpxvxpr.w
*** 3DLDF-2.0.2/src/cmpxvxpr.w	Wed Nov  6 21:02:09 2013
--- 3DLDF-2.0.3/src/cmpxvxpr.w	Thu Dec 12 13:32:21 2013
***************
*** 105,116 ****
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
! @q **** (4) Error handling:  |entry == 0 || entry->object == 0|.@> 
  
! @ Error handling:  |entry == 0 || entry->object == 0|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 105,118 ----
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
! @q **** (4) Error handling:  
! |entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0)|.@> 
  
! @ Error handling:  
! |entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0)|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 120,127 ****
                  << "Rule `complex_vector_primary --> "
                  << "complex_vector_variable':"
!                 << endl << "`entry' == 0 or `entry->object' == 0."
                  << endl 
                  << "Setting `complex_vector_primary' "
!                 << "to 0 and will try to continue.";
  
        log_message(cerr_strm);
--- 122,130 ----
                  << "Rule `complex_vector_primary --> "
                  << "complex_vector_variable':"
!                 << endl << "`entry' == static_cast<Id_Map_Entry_Node>(0) or "
!                 << "`entry->object' == static_cast<void*>(0)."
                  << endl 
                  << "Setting `complex_vector_primary' "
!                 << "to static_cast<void*>(0) and will try to continue.";
  
        log_message(cerr_strm);
***************
*** 129,144 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
! @q **** (4) |!(entry == 0 || entry->object == 0)|.@> 
  
! @ |!(entry == 0 || entry->object == 0)|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
!   else /* |!(entry == 0 || entry->object == 0)|  */
! 
       {
  
--- 132,148 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
! @q **** (4) |!(   entry == static_cast<Id_Map_Entry_Node>(0)  @>
! @q **** (4)    || entry->object == static_cast<void*>(0))|.   @>
  
! @ |!(entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))|.
  \initials{LDF 2007.12.02.}
  
  @<Define rules@>=
!   else 
       {
  
***************
*** 151,155 ****
          @=$$@> = static_cast<void*>(pv);                    
  
!      }  /* |else| (|!(entry == 0 || entry->object == 0)|)  */
  
  };
--- 155,159 ----
          @=$$@> = static_cast<void*>(pv);                    
  
!      }  /* |else|  */
  
  };
diff -rc2P 3DLDF-2.0.2/src/cncsctlt.web 3DLDF-2.0.3/src/cncsctlt.web
*** 3DLDF-2.0.2/src/cncsctlt.web	Wed Nov  6 20:53:54 2013
--- 3DLDF-2.0.3/src/cncsctlt.web	Fri Dec 13 16:18:27 2013
***************
*** 1385,1389 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!    if (pv == 0)
     {
         cerr_strm << thread_name << "ERROR!  "
--- 1385,1389 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
     {
         cerr_strm << thread_name << "ERROR!  "
***************
*** 1401,1405 ****
         return 0;
  
!    }  /* |if (pv == 0)|  */
  
  @q ******* (7) Error handling:  |*pv| contains too few |Points|.@>
--- 1401,1405 ----
         return 0;
  
!    }  /* |if (pv == static_cast<Pointer_Vector<Point>*>(0))|  */
  
  @q ******* (7) Error handling:  |*pv| contains too few |Points|.@>
***************
*** 1429,1433 ****
         return 0;
  
!    }  /* |if (pv == 0)|  */
  
  
--- 1429,1433 ----
         return 0;
  
!    }  /* |if (pv->ctr < 3)|  */
  
  
***************
*** 1747,1753 ****
     Path q;
  
!    if (   lattice[0] == 0 || *lattice[0] == INVALID_POINT
!        || lattice[1] == 0 || *lattice[1] == INVALID_POINT      
!        || lattice[2] == 0 || *lattice[2] == INVALID_POINT)
        return INVALID_PLANE;
  
--- 1747,1756 ----
     Path q;
  
!    if (   lattice[0] == static_cast<Point*>(0) 
!        || *lattice[0] == INVALID_POINT
!        || lattice[1] == static_cast<Point*>(0) 
!        || *lattice[1] == INVALID_POINT      
!        || lattice[2] == static_cast<Point*>(0) 
!        || *lattice[2] == INVALID_POINT)
        return INVALID_PLANE;
  
***************
*** 2031,2035 ****
                             do_shift);
  
!       if (p != 0)
        {  
            Pointer_Vector<Point>* pv = new Pointer_Vector<Point>;
--- 2034,2038 ----
                             do_shift);
  
!       if (p != static_cast<Point*>(0))
        {  
            Pointer_Vector<Point>* pv = new Pointer_Vector<Point>;
***************
*** 2076,2080 ****
  
     Point p;
!    Point* q = 0;
  
     bool b = true;
--- 2079,2083 ----
  
     Point p;
!    Point* q = static_cast<Point*>(0);
  
     bool b = true;
***************
*** 2259,2263 ****
  */ 
  
!              if (q == 0 && quit_on_error)
               {
                  cerr_strm << thread_name << "ERROR!  "
--- 2262,2266 ----
  */ 
  
!              if (q == static_cast<Point*>(0) && quit_on_error)
               {
                  cerr_strm << thread_name << "ERROR!  "
***************
*** 2276,2280 ****
               }  /* |if|  */
  
!              else if (q == 0)
               {
                  cerr_strm << thread_name << "WARNING!  "
--- 2279,2283 ----
               }  /* |if|  */
  
!              else if (q == static_cast<Point*>(0))
               {
                  cerr_strm << thread_name << "WARNING!  "
***************
*** 2291,2300 ****
               }  /* |else if|  */
  
!              else  /* |q != 0|  */
               {
                  *pv += q;
               }
  
!              q = 0;
               start_temp += increment;
               start += increment;
--- 2294,2303 ----
               }  /* |else if|  */
  
!              else  /* |q != static_cast<Point*>(0)|  */
               {
                  *pv += q;
               }
  
!              q = static_cast<Point*>(0);
               start_temp += increment;
               start += increment;
***************
*** 2420,2426 ****
  @q ****** (6) Preliminaries.@>   
  
! #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
! #endif /* |DEBUG_COMPILE|  */@; 
  
     stringstream cerr_strm;
--- 2423,2427 ----
  @q ****** (6) Preliminaries.@>   
  
!    volatile bool DEBUG = false; /* |true| */ @; 
  
     stringstream cerr_strm;
diff -rc2P 3DLDF-2.0.2/src/colors.web 3DLDF-2.0.3/src/colors.web
*** 3DLDF-2.0.2/src/colors.web	Wed Nov  6 20:53:54 2013
--- 3DLDF-2.0.3/src/colors.web	Sun Nov 10 19:07:50 2013
***************
*** 605,611 ****
  @<Define |Color| functions@>=
  
!        red_part   = min(1.0, red_part + c.red_part);
!        green_part = min(1.0, green_part + c.green_part);
!        blue_part  = min(1.0, blue_part + c.blue_part);
  
  @q **** (4).@>
--- 605,611 ----
  @<Define |Color| functions@>=
  
!        red_part   = min(static_cast<real>(1.0), red_part + c.red_part);
!        green_part = min(static_cast<real>(1.0), green_part + c.green_part);
!        blue_part  = min(static_cast<real>(1.0), blue_part + c.blue_part);
  
  @q **** (4).@>
***************
*** 613,619 ****
     if (type == RGB_COLOR && c.type == RGB_COLOR)
        {
!           red_part   = min(1.0, red_part + c.red_part);
!           green_part = min(1.0, green_part + c.green_part);
!           blue_part  = min(1.0, blue_part + c.blue_part);
        }
  #endif 
--- 613,619 ----
     if (type == RGB_COLOR && c.type == RGB_COLOR)
        {
!           red_part   = min(static_cast<real>(1.0), red_part + c.red_part);
!           green_part = min(static_cast<real>(1.0), green_part + c.green_part);
!           blue_part  = min(static_cast<real>(1.0), blue_part + c.blue_part);
        }
  #endif 
diff -rc2P 3DLDF-2.0.2/src/complex.web 3DLDF-2.0.3/src/complex.web
*** 3DLDF-2.0.2/src/complex.web	Wed Nov  6 21:02:08 2013
--- 3DLDF-2.0.3/src/complex.web	Thu Dec 12 13:56:39 2013
***************
*** 92,96 ****
  {
  
!    friend int yyparse(void*);
  
  
--- 92,96 ----
  {
  
!    friend int yyparse(yyscan_t);
  
  
***************
*** 394,398 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 394,398 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 501,507 ****
  @q ****** (6) Preliminaries.@>   
  
! #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
! #endif /* |DEBUG_COMPILE|  */@; 
  
     stringstream cerr_strm;
--- 501,505 ----
  @q ****** (6) Preliminaries.@>   
  
!    volatile bool DEBUG = false; /* |true| */ @; 
  
     stringstream cerr_strm;
***************
*** 517,521 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 515,519 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 626,630 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 624,628 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 724,728 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 722,726 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 822,826 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 820,824 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 919,923 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 917,921 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 1017,1021 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 1015,1019 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
diff -rc2P 3DLDF-2.0.2/src/cones.web 3DLDF-2.0.3/src/cones.web
*** 3DLDF-2.0.2/src/cones.web	Wed Nov  6 20:53:54 2013
--- 3DLDF-2.0.3/src/cones.web	Thu Dec 12 13:59:54 2013
***************
*** 314,324 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q **** (4) WARNING:  |options == 0|.@> 
! @ WARNING:  |options == 0|.
  \initials{LDF 2006.11.08.}
  
  @<Define |Cone| functions@>=
  
!     if (options == 0)
      {  
           cerr_strm << "WARNING!  In `Cone::set()':"
--- 314,324 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q **** (4) WARNING:  |options == static_cast<Cone_Set_Option_Struct*>(0)|.@> 
! @ WARNING:  |options == static_cast<Cone_Set_Option_Struct*>(0)|.
  \initials{LDF 2006.11.08.}
  
  @<Define |Cone| functions@>=
  
!     if (options == static_cast<Cone_Set_Option_Struct*>(0))
      {  
           cerr_strm << "WARNING!  In `Cone::set()':"
***************
*** 333,337 ****
           return 1;
           
!     }  /* |if (options == 0)|  */
  
  
--- 333,337 ----
           return 1;
           
!     }  /* |if (options == static_cast<Cone_Set_Option_Struct*>(0))|  */
  
  
***************
*** 342,350 ****
  @<Define |Cone| functions@>=
  
!     if (options->center != 0)
      {
          center = *options->center;
  
!     }  /* |if (options->center == 0)|  */
    
  
--- 342,350 ----
  @<Define |Cone| functions@>=
  
!     if (options->center != static_cast<Point*>(0))
      {
          center = *options->center;
  
!     }  /* |if (options->center == static_cast<Point*>(0))|  */
    
  
***************
*** 355,363 ****
  @<Define |Cone| functions@>=
  
!     if (options->direction != 0)
      {
          direction = *options->direction;
  
!     }  /* |if (options->direction == 0)|  */
    
  
--- 355,363 ----
  @<Define |Cone| functions@>=
  
!     if (options->direction != static_cast<Point*>(0))
      {
          direction = *options->direction;
  
!     }  /* |if (options->direction == static_cast<Point*>(0))|  */
    
  
***************
*** 559,563 ****
             center.set(0, axis_y, 0);
  
!         if (options->center != 0)
             shift(*options->center - center);
  
--- 559,563 ----
             center.set(0, axis_y, 0);
  
!         if (options->center != static_cast<Point*>(0))
             shift(*options->center - center);
  
***************
*** 722,726 ****
             center.set(0, axis_y, 0);
  
!         if (options->center != 0)
             shift(*options->center - center);
  
--- 722,726 ----
             center.set(0, axis_y, 0);
  
!         if (options->center != static_cast<Point*>(0))
             shift(*options->center - center);
  
***************
*** 1027,1035 ****
  @q **** (4)@> 
  
!         Point* p = 0;
  
  @q **** (4)@> 
     
!     if (type == CIRCULAR_CONE_TYPE && base != 0)
      {
           p = create_new<Point>(0);
--- 1027,1035 ----
  @q **** (4)@> 
  
!         Point* p = static_cast<Point*>(0);
  
  @q **** (4)@> 
     
!     if (type == CIRCULAR_CONE_TYPE && base != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 1043,1047 ****
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CONE_TYPE && base != 0)
      {
           p = create_new<Point>(0);
--- 1043,1047 ----
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CONE_TYPE && base != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 1083,1087 ****
      Point* p;
  
!     if (type == CIRCULAR_CONE_TYPE && cap != 0)
      {
           p = create_new<Point>(0);
--- 1083,1087 ----
      Point* p;
  
!     if (type == CIRCULAR_CONE_TYPE && cap != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 1094,1098 ****
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CONE_TYPE && cap != 0)
      {
           p = create_new<Point>(0);
--- 1094,1098 ----
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CONE_TYPE && cap != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 1389,1393 ****
  {
  
!     if (center != 0)
         center->shift_times(x, y, z);
  
--- 1389,1393 ----
  {
  
!     if (center != static_cast<Point*>(0))
         center->shift_times(x, y, z);
  
diff -rc2P 3DLDF-2.0.2/src/conicsct.web 3DLDF-2.0.3/src/conicsct.web
*** 3DLDF-2.0.2/src/conicsct.web	Wed Nov  6 20:53:54 2013
--- 3DLDF-2.0.3/src/conicsct.web	Thu Dec 12 14:03:34 2013
***************
*** 621,625 ****
        X = bp.pt;
  
!       if (isect_pv != 0)
           *isect_pv += create_new<Point>(X);
  
--- 621,625 ----
        X = bp.pt;
  
!       if (isect_pv != static_cast<Pointer_Vector<Point>*>(0))
           *isect_pv += create_new<Point>(X);
  
***************
*** 672,676 ****
        Y = bp.pt;
  
!       if (isect_pv != 0)
           *isect_pv += create_new<Point>(Y);
  
--- 672,676 ----
        Y = bp.pt;
  
!       if (isect_pv != static_cast<Pointer_Vector<Point>*>(0))
           *isect_pv += create_new<Point>(Y);
  
***************
*** 723,727 ****
        Z = bp.pt;
  
!       if (isect_pv != 0)
           *isect_pv += create_new<Point>(Z);
  
--- 723,727 ----
        Z = bp.pt;
  
!       if (isect_pv != static_cast<Pointer_Vector<Point>*>(0))
           *isect_pv += create_new<Point>(Z);
  
***************
*** 848,852 ****
  @<Define |Conic_Section| functions@>=
     
!    if (pv == 0)
     {
         cerr_strm << thread_name << "ERROR!  "
--- 848,852 ----
  @<Define |Conic_Section| functions@>=
     
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
     {
         cerr_strm << thread_name << "ERROR!  "
***************
*** 860,864 ****
  
  
!    }  /* |if (pv == 0)|  */
  
  @q ***** (5)@> 
--- 860,864 ----
  
  
!    }  /* |if (pv == static_cast<Pointer_Vector<Point>*>(0))|  */
  
  @q ***** (5)@> 
***************
*** 1006,1010 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1006,1010 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1053,1063 ****
  \ENDLOG
  
! @q ***** (5) Error handling:  |pv == 0|.@> 
! @ Error handling:  |pv == 0|.
  \initials{LDF 2007.07.15.}
  
  @<Define |Conic_Section| functions@>=
  
!    if (pv == 0)
     {
          cerr_strm << thread_name << "ERROR!  In `Conic_Section::generate':"
--- 1053,1063 ----
  \ENDLOG
  
! @q ***** (5) Error handling:  |pv == static_cast<Pointer_Vector<Point>*>(0)|.@> 
! @ Error handling:  |pv == static_cast<Pointer_Vector<Point>*>(0)|.
  \initials{LDF 2007.07.15.}
  
  @<Define |Conic_Section| functions@>=
  
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
     {
          cerr_strm << thread_name << "ERROR!  In `Conic_Section::generate':"
***************
*** 1072,1076 ****
         return 0;
  
!    }  /* |if (pv == 0)|  */
  
  @q ***** (5) Error handling:  |*pv| doesn't contain enough |Points|.@> 
--- 1072,1076 ----
         return 0;
  
!    }  /* |if (pv == static_cast<Pointer_Vector<Point>*>(0))|  */
  
  @q ***** (5) Error handling:  |*pv| doesn't contain enough |Points|.@> 
***************
*** 1268,1272 ****
     bool XYZ_set = false;
  
!    if (isect_pv != 0 && isect_pv->v.size() >= 3)
     {
        X = *isect_pv->v[0];
--- 1268,1272 ----
     bool XYZ_set = false;
  
!    if (isect_pv != static_cast<Pointer_Vector<Point>*>(0) && isect_pv->v.size() >= 3)
     {
        X = *isect_pv->v[0];
***************
*** 1712,1716 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 1712,1716 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
***************
*** 1902,1906 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 1902,1906 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
diff -rc2P 3DLDF-2.0.2/src/creatnew.web 3DLDF-2.0.3/src/creatnew.web
*** 3DLDF-2.0.2/src/creatnew.web	Wed Nov  6 20:56:26 2013
--- 3DLDF-2.0.3/src/creatnew.web	Thu Dec 12 14:06:42 2013
***************
*** 193,197 ****
  #endif /* |DEBUG_COMPILE|  */ 
  
!   if (arg != 0)
      *obj = *arg;
  
--- 193,197 ----
  #endif /* |DEBUG_COMPILE|  */ 
  
!   if (arg != static_cast<const C*>(0))
      *obj = *arg;
  
diff -rc2P 3DLDF-2.0.2/src/cslcmnd.w 3DLDF-2.0.3/src/cslcmnd.w
*** 3DLDF-2.0.2/src/cslcmnd.w	Wed Nov  6 21:02:07 2013
--- 3DLDF-2.0.3/src/cslcmnd.w	Thu Dec 12 14:21:21 2013
***************
*** 85,89 ****
      } 
  
!     @=$$@> = 0;
  
  };
--- 85,89 ----
      } 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 133,137 ****
      }
   
!     @=$$@> = 0;
  
  
--- 133,137 ----
      }
   
!     @=$$@> = static_cast<void*>(0);
  
  
***************
*** 169,173 ****
      delete t;    
  
!     @=$$@> = 0;
  
  };
--- 169,173 ----
      delete t;    
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 199,203 ****
      }
  
!     @=$$@> = 0;
  
  };
--- 199,203 ----
      }
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 229,233 ****
      }
  
!     @=$$@> = 0;
  
  };
--- 229,233 ----
      }
  
!     @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/cslexpr.w 3DLDF-2.0.3/src/cslexpr.w
*** 3DLDF-2.0.2/src/cslexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/cslexpr.w	Thu Dec 12 14:29:25 2013
***************
*** 91,102 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
!   else /* |entry != 0 && entry->object != 0|  */
  
      @=$$@> = static_cast<void*>(create_new<Conic_Section_Lattice>(
--- 91,104 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
!   else /* |   entry != static_cast<Id_Map_Entry_Node>(0) 
!            && entry->object != static_cast<void*>(0)|  */
  
      @=$$@> = static_cast<void*>(create_new<Conic_Section_Lattice>(
***************
*** 187,195 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->conic_section_lattice_options == 0)
!       scanner_node->conic_section_lattice_options 
!          = new Conic_Section_Lattice_Options;
  
!    @=$$@> = 0;
  
  };
--- 189,199 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node->conic_section_lattice_options 
!        == static_cast<Conic_Section_Lattice_Options*>(0))
!    {
!       scanner_node->conic_section_lattice_options = new Conic_Section_Lattice_Options;
!    }
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 214,218 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 218,222 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 251,255 ****
            = true;
  
!    @=$$@> = 0;
  
  };
--- 255,259 ----
            = true;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 274,278 ****
           = false;
  
!    @=$$@> = 0;
  
  };
--- 278,282 ----
           = false;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 297,301 ****
            = true;
  
!    @=$$@> = 0;
  
  };
--- 301,305 ----
            = true;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 320,324 ****
           = false;
  
!    @=$$@> = 0;
  
  };
--- 324,328 ----
           = false;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 344,348 ****
            = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 348,352 ----
            = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 373,377 ****
            = true;
  
!    @=$$@> = 0;
  
  };
--- 377,381 ----
            = true;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 396,400 ****
           = false;
  
!    @=$$@> = 0;
  
  };
--- 400,404 ----
           = false;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 422,426 ****
           = static_cast<Transform*>(@=$2@>);
  
!    @=$$@> = 0;
  
  };
--- 426,430 ----
           = static_cast<Transform*>(@=$2@>);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 452,456 ****
        = static_cast<Pointer_Vector<Conic_Section_Lattice>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == 0|.@> 
  
  @ Error handling:  |pv == 0|.
--- 456,460 ----
        = static_cast<Pointer_Vector<Conic_Section_Lattice>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == static_cast<Pointer_Vector<Conic_Section_Lattice>*>(0)|.@>
  
  @ Error handling:  |pv == 0|.
***************
*** 459,470 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete r;
  
!           @=$$@> = 0;
  
!       }  /* |if (pv == 0)|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
--- 463,474 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Conic_Section_Lattice>*>(0))
        {
  
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
!       }  /* |if (pv == static_cast<Pointer_Vector<Conic_Section_Lattice>*>(0))|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
***************
*** 480,490 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != 0 && pv->ctr > 0|.@> 
  
! @ |pv != 0 && pv->ctr > 0|.  Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.07.29.}
  
--- 484,495 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != static_cast<Pointer_Vector<Conic_Section_Lattice>*>(0) && pv->ctr > 0|.@>
  
! @ |pv != static_cast<Pointer_Vector<Conic_Section_Lattice>*>(0) && pv->ctr > 0|.  
! Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.07.29.}
  
***************
*** 500,505 ****
  };
  
- 
- 
  @q * (1) conic_section_lattice secondary.@>
  @* \§conic section lattice secondary>.
--- 505,508 ----
***************
*** 561,565 ****
    {
        delete t;
!       @=$$@> = 0;
    }
  };
--- 564,568 ----
    {
        delete t;
!       @=$$@> = static_cast<void*>(0);
    }
  };
diff -rc2P 3DLDF-2.0.2/src/cslvexpr.w 3DLDF-2.0.3/src/cslvexpr.w
*** 3DLDF-2.0.2/src/cslvexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/cslvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/cuboid.web 3DLDF-2.0.3/src/cuboid.web
*** 3DLDF-2.0.2/src/cuboid.web	Wed Nov  6 20:56:26 2013
--- 3DLDF-2.0.3/src/cuboid.web	Thu Dec 12 14:11:47 2013
***************
*** 700,704 ****
             if (bpp.first.pt != INVALID_POINT)
                {
!                   if (bpv == 0)
                       {
                           bpv = new Pointer_Vector<Bool_Point>;
--- 700,704 ----
             if (bpp.first.pt != INVALID_POINT)
                {
!                   if (bpv == static_cast<Pointer_Vector<Bool_Point>*>(0))
                       {
                           bpv = new Pointer_Vector<Bool_Point>;
***************
*** 721,725 ****
             if (bpp.second.pt != INVALID_POINT)
                {
!                   if (bpv == 0)
                       {
                           bpv = new Pointer_Vector<Bool_Point>;
--- 721,725 ----
             if (bpp.second.pt != INVALID_POINT)
                {
!                   if (bpv == static_cast<Pointer_Vector<Bool_Point>*>(0))
                       {
                           bpv = new Pointer_Vector<Bool_Point>;
***************
*** 837,841 ****
                continue;
  
!            else  /* |bpv != 0 && bpv->ctr > 0|  */
                {
  
--- 837,842 ----
                continue;
  
!            else  /* |   bpv != static_cast<Pointer_Vector<Bool_Point>*>(0) 
!                      && bpv->ctr > 0|  */
                {
  
***************
*** 858,862 ****
                       }  /* End of first inner |for|  */
  
!              }  /* |else| (|bpv != 0|)  */
  
            delete bpv;
--- 859,863 ----
                       }  /* End of first inner |for|  */
  
!              }  /* |else| (|bpv != static_cast<Pointer_Vector<Bool_Point>*>(0)|)  */
  
            delete bpv;
***************
*** 976,983 ****
    Cuboid* cuboid_reflection = static_cast<Cuboid*>(v);  
  
! @q *** (3) If |cuboid_reflection == 0|, try to allocate memory @>
! @q *** (3) on the free store for it.                           @> 
  
! @ If |cuboid_reflection == 0|, try to allocate memory 
  on the free store for it.                            
  \initials{LDF 2004.10.12.}
--- 977,984 ----
    Cuboid* cuboid_reflection = static_cast<Cuboid*>(v);  
  
! @q *** (3) If |cuboid_reflection == static_cast<Cuboid*>(0)|, try to allocate memory @>
! @q *** (3) on the free store for it.                                                 @>
  
! @ If |cuboid_reflection == static_cast<Cuboid*>(0)|, try to allocate memory 
  on the free store for it.                            
  \initials{LDF 2004.10.12.}
***************
*** 985,989 ****
  @<Define |Cuboid| functions@>=
  
!  if (cuboid_reflection == 0)
   {
    try
--- 986,990 ----
  @<Define |Cuboid| functions@>=
  
!  if (cuboid_reflection == static_cast<Cuboid*>(0))
   {
    try
***************
*** 1020,1024 ****
  @q *** (3).@> 
  
!   } /* |if (cuboid_reflection == 0)|  */
  
  @q *** (3) Call |Solid_Faced::reflect_in()|.@> 
--- 1021,1025 ----
  @q *** (3).@> 
  
!   } /* |if (cuboid_reflection == static_cast<Cuboid*>(0))|  */
  
  @q *** (3) Call |Solid_Faced::reflect_in()|.@> 
diff -rc2P 3DLDF-2.0.2/src/curves.web 3DLDF-2.0.3/src/curves.web
*** 3DLDF-2.0.2/src/curves.web	Wed Nov  6 20:56:26 2013
--- 3DLDF-2.0.3/src/curves.web	Thu Dec 12 19:44:18 2013
***************
*** 205,218 ****
    Reg_Cl_Plane_Curve* reg_cl_plane_curve_reflection = static_cast<Reg_Cl_Plane_Curve*>(v);  
  
! @q *** (3) If |reg_cl_plane_curve_reflection == 0|, try to allocate memory @>
! @q *** (3) on the free store for it.                           @> 
  
! @ If |reg_cl_plane_curve_reflection == 0|, try to allocate memory 
! on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!  if (reg_cl_plane_curve_reflection == 0)
   {
    try
--- 205,218 ----
    Reg_Cl_Plane_Curve* reg_cl_plane_curve_reflection = static_cast<Reg_Cl_Plane_Curve*>(v);  
  
! @q *** (3) If |reg_cl_plane_curve_reflection == static_cast<Reg_Cl_Plane_Curve*>(0)|, @>
! @q *** (3) try to allocate memory on the free store for it.                           @> 
  
! @ If |reg_cl_plane_curve_reflection == static_cast<Reg_Cl_Plane_Curve*>(0)|, 
! try to allocate memory on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!  if (reg_cl_plane_curve_reflection == static_cast<Reg_Cl_Plane_Curve*>(0))
   {
    try
***************
*** 249,253 ****
  @q *** (3).@> 
  
!   } /* |if (reg_cl_plane_curve_reflection == 0)|  */
  
  @q *** (3) Call |Path::reflect_in()|.@> 
--- 249,253 ----
  @q *** (3).@> 
  
!   } /* |if (reg_cl_plane_curve_reflection == static_cast<Reg_Cl_Plane_Curve*>(0))|  */
  
  @q *** (3) Call |Path::reflect_in()|.@> 
***************
*** 613,617 ****
          cerr << "ERROR! In Reg_Cl_Plane_Curve::location():"
               <<  "The Reg_Cl_Plane_Curve is non-planar.\n"
!              << "Returning -6\n\n" << flush;
          return -6;
        }
--- 613,617 ----
          cerr << "ERROR! In Reg_Cl_Plane_Curve::location():"
               <<  "The Reg_Cl_Plane_Curve is non-planar.\n"
!              << "Returning -6\n\n";
          return -6;
        }
***************
*** 627,631 ****
            cerr << "WARNING! In Reg_Cl_Plane_Curve::location().\n"
                 << "Point is not in plane of regular closed plane curve.\n"
!                << "Returning -2.\n\n" << flush;
            return -2;
        }
--- 627,631 ----
            cerr << "WARNING! In Reg_Cl_Plane_Curve::location().\n"
                 << "Point is not in plane of regular closed plane curve.\n"
!                << "Returning -2.\n\n";
            return -2;
        }
***************
*** 642,650 ****
        copy_normal.show("copy_normal");
  
!     if (copy_normal.magnitude() == 0)
        {
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
!             << "Normal has no magnitude. Returning -4\n\n"
!               << flush;
            return -4;
        }
--- 642,650 ----
        copy_normal.show("copy_normal");
  
!     if (copy_normal.magnitude() == ZERO_REAL)
        {
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
!             << "Normal has no magnitude. Returning -4\n\n";
!               
            return -4;
        }
***************
*** 693,697 ****
      if (DEBUG)
        {
!           cerr << "orientation == " << orientation << endl << flush;
  #if 0 
  
--- 693,697 ----
      if (DEBUG)
        {
!           cerr << "orientation == " << orientation << endl;
  #if 0 
  
***************
*** 760,765 ****
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
              << "orientation has invalid value: " << orientation
!               << "\nReturning -5\n\n"
!                 << flush;
            return -5;
        }
--- 760,764 ----
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
              << "orientation has invalid value: " << orientation
!               << "\nReturning -5\n\n";
            return -5;
        }
***************
*** 816,820 ****
        {
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
!             << "This can't happen! Returning -3.\n" << flush;
  
            if (DEBUG)
--- 815,819 ----
        {
            cerr << "ERROR! In Reg_Cl_Plane_Curve::location().\n"
!             << "This can't happen! Returning -3.\n";
  
            if (DEBUG)
***************
*** 841,845 ****
      cerr << "ERROR! In Reg_Cl_Plane_Curve::angle_point().\n"
           << "This virtual function doesn't have a real definition for "
!          << "ordinary Reg_Cl_Plane_Curves.\nReturning INVALID_POINT.\n\n" << flush;
      return INVALID_POINT;
  }
--- 840,844 ----
      cerr << "ERROR! In Reg_Cl_Plane_Curve::angle_point().\n"
           << "This virtual function doesn't have a real definition for "
!          << "ordinary Reg_Cl_Plane_Curves.\nReturning INVALID_POINT.\n\n";
      return INVALID_POINT;
  }
***************
*** 973,977 ****
      if(DEBUG)
        cerr << " *** Entering Reg_Cl_Plane_Curve::"
!            << "intersection_points()\n" << flush; 
    Bool_Point_Pair bpp = INVALID_BOOL_POINT_PAIR;
  
--- 972,976 ----
      if(DEBUG)
        cerr << " *** Entering Reg_Cl_Plane_Curve::"
!            << "intersection_points()\n"; 
    Bool_Point_Pair bpp = INVALID_BOOL_POINT_PAIR;
  
***************
*** 1017,1023 ****
          pt_vector.show("pt_vector:");
          pl.normal.show("pl.normal");
!         cerr << "Returning INVALID_BOOL_POINT_PAIR.\n\n" << flush;
          if (DEBUG) 
!           cerr << "Exiting Polygon::intersection_points().\n\n" << flush;
          return INVALID_BOOL_POINT_PAIR;
      }
--- 1016,1022 ----
          pt_vector.show("pt_vector:");
          pl.normal.show("pl.normal");
!         cerr << "Returning INVALID_BOOL_POINT_PAIR.\n\n";
          if (DEBUG) 
!           cerr << "Exiting Polygon::intersection_points().\n\n";
          return INVALID_BOOL_POINT_PAIR;
      }
***************
*** 1042,1046 ****
  \ENDLOG 
  @<Define |Reg_Cl_Plane_Curve| functions@>=
!   if (distance == 0)
      {
          if (DEBUG)
--- 1041,1046 ----
  \ENDLOG 
  @<Define |Reg_Cl_Plane_Curve| functions@>=
! 
!   if (distance == ZERO_REAL)
      {
          if (DEBUG)
***************
*** 1094,1101 ****
          if (DEBUG)
            {
!             cerr << "ang == " << ang << endl << flush;
            }
  
!         if (ang != 0)
            {
              if (curve_0.get_z() > 0)
--- 1094,1101 ----
          if (DEBUG)
            {
!             cerr << "ang == " << ang << endl;
            }
  
!         if (ang != ZERO_REAL)
            {
              if (curve_0.get_z() > 0)
***************
*** 1114,1118 ****
          ang = curve_0.angle(x_axis_pt);
  
!         if (ang != 0)
            {
              if (curve_0.get_y() > 0)
--- 1114,1118 ----
          ang = curve_0.angle(x_axis_pt);
  
!         if (ang != ZERO_REAL)
            {
              if (curve_0.get_y() > 0)
***************
*** 1136,1144 ****
            {
              curve_4.show("curve_4");
!             cerr << "ang == " << ang << endl << flush;
            }
  
  
!         if (ang != 0)
            {
              if (curve_4.get_y() > 0)
--- 1136,1144 ----
            {
              curve_4.show("curve_4");
!             cerr << "ang == " << ang << endl;
            }
  
  
!         if (ang != ZERO_REAL)
            {
              if (curve_4.get_y() > 0)
***************
*** 1190,1194 ****
  
          if (DEBUG)
!           cerr << "Slope == " << Slope << endl << flush;
          Real_Pair rr;
  
--- 1190,1194 ----
  
          if (DEBUG)
!           cerr << "Slope == " << Slope << endl;
          Real_Pair rr;
  
***************
*** 1200,1208 ****
  
  
!     if (Slope == 0) /* v is known, h is unknown. */
        {
          if (DEBUG)
            {
!             cerr << "Slope == 0" << endl << flush;
               
            }
--- 1200,1208 ----
  
  
!     if (Slope == ZERO_REAL) /* v is known, h is unknown. */
        {
          if (DEBUG)
            {
!             cerr << "Slope == ZERO_REAL" << endl;
               
            }
***************
*** 1228,1232 ****
               
            }
!       } /* End |Slope == 0|. */
  
  @q ****** (6) Slope is undefined (line is vertical).@>
--- 1228,1232 ----
               
            }
!       } /* End |Slope == ZERO_REAL|. */
  
  @q ****** (6) Slope is undefined (line is vertical).@>
***************
*** 1268,1272 ****
          v_intercept = pt0_v - (Slope * pt0_h);
          if (DEBUG)
!           cerr << "v_intercept == " << v_intercept << endl << flush;
  
          Real_Triple coeffs = get_coefficients(Slope, v_intercept);
--- 1268,1272 ----
          v_intercept = pt0_v - (Slope * pt0_h);
          if (DEBUG)
!           cerr << "v_intercept == " << v_intercept << endl;
  
          Real_Triple coeffs = get_coefficients(Slope, v_intercept);
***************
*** 1277,1281 ****
              if (DEBUG)
                {
!                 cerr << "Solving quadratic.\n" << flush;
                   
                }
--- 1277,1281 ----
              if (DEBUG)
                {
!                 cerr << "Solving quadratic.\n";
                   
                }
***************
*** 1286,1291 ****
            {
              cerr << "Not a quadratic. "
!                  << "Haven't programmed this case yet.\n"
!                  << flush;
               
            }
--- 1286,1290 ----
            {
              cerr << "Not a quadratic. "
!                  << "Haven't programmed this case yet.\n";
               
            }
***************
*** 1331,1337 ****
    {
      cerr << "on_segment.first == "
!       << on_segment.first << endl << flush;
      cerr << "on_segment.second == "
!       << on_segment.second << endl << flush;
    }
       
--- 1330,1336 ----
    {
      cerr << "on_segment.first == "
!       << on_segment.first << endl;
      cerr << "on_segment.second == "
!       << on_segment.second << endl;
    }
       
***************
*** 1349,1353 ****
    {
            if (DEBUG)
!             cerr << "Transforming bpp.first.pt\n" << flush;
            bpp.first.pt *= t_inverse;
          }
--- 1348,1352 ----
    {
            if (DEBUG)
!             cerr << "Transforming bpp.first.pt\n";
            bpp.first.pt *= t_inverse;
          }
***************
*** 1355,1359 ****
    {
      if (DEBUG)
!       cerr << "bpp.first.pt is invalid\n" << flush;
    }
          
--- 1354,1358 ----
    {
      if (DEBUG)
!       cerr << "bpp.first.pt is invalid\n";
    }
          
***************
*** 1375,1381 ****
    {
      cerr << "on_segment.first == "
!       << on_segment.first << endl << flush;
      cerr << "on_segment.second == "
!       << on_segment.second << endl << flush;
    }
          
--- 1374,1380 ----
    {
      cerr << "on_segment.first == "
!       << on_segment.first << endl;
      cerr << "on_segment.second == "
!       << on_segment.second << endl;
    }
          
***************
*** 1383,1387 ****
    {
      if (DEBUG)
!       cerr << "Transforming bpp.second.pt\n" << flush;
      bpp.second.pt *= t_inverse;
    }
--- 1382,1386 ----
    {
      if (DEBUG)
!       cerr << "Transforming bpp.second.pt\n";
      bpp.second.pt *= t_inverse;
    }
***************
*** 1390,1404 ****
      bpp.second.pt = INVALID_POINT;
      if (DEBUG)
!       cerr << "bpp.second.pt is invalid\n" << flush;
    }
          
  if(DEBUG)
    {
!     cerr << "rr.first == " << rr.first << endl << flush;
!     cerr << "rr.second == " << rr.second << endl << flush;
      cerr << "bpp.first.b == "
!       << bpp.first.b << endl << flush;
      cerr << "bpp.second.b == "
!       << bpp.second.b << endl << flush;
      bpp.first.pt.show("bpp.first.pt");
      bpp.second.pt.show("bpp.second.pt");
--- 1389,1403 ----
      bpp.second.pt = INVALID_POINT;
      if (DEBUG)
!       cerr << "bpp.second.pt is invalid\n";
    }
          
  if(DEBUG)
    {
!     cerr << "rr.first == " << rr.first << endl;
!     cerr << "rr.second == " << rr.second << endl;
      cerr << "bpp.first.b == "
!       << bpp.first.b << endl;
      cerr << "bpp.second.b == "
!       << bpp.second.b << endl;
      bpp.first.pt.show("bpp.first.pt");
      bpp.second.pt.show("bpp.second.pt");
***************
*** 1415,1419 ****
               << "Line and Reg_Cl_Plane_Curve are in parallel planes.\n"
               << "No intersections. Returning INVALID_BOOL_POINT_PAIR."
!              << endl << endl << flush;
        return INVALID_BOOL_POINT_PAIR;
    }
--- 1414,1418 ----
               << "Line and Reg_Cl_Plane_Curve are in parallel planes.\n"
               << "No intersections. Returning INVALID_BOOL_POINT_PAIR."
!              << endl << endl;
        return INVALID_BOOL_POINT_PAIR;
    }
***************
*** 1430,1434 ****
                if (DEBUG) 
                  cerr << "The line is perpendicular to the "
!                      << "Reg_Cl_Plane_Curve.\n" << flush; 
            }
  
--- 1429,1433 ----
                if (DEBUG) 
                  cerr << "The line is perpendicular to the "
!                      << "Reg_Cl_Plane_Curve.\n"; 
            }
  
***************
*** 1437,1441 ****
                if (DEBUG) 
                  cerr << "The line and the Reg_Cl_Plane_Curve "
!                      << "are non-coplanar.\n" << flush; 
            }
  
--- 1436,1440 ----
                if (DEBUG) 
                  cerr << "The line and the Reg_Cl_Plane_Curve "
!                      << "are non-coplanar.\n"; 
            }
  
***************
*** 1450,1454 ****
          
          if (DEBUG) 
!           cerr << "location: s == " << s << endl << flush;
  
          if (s > -1)
--- 1449,1453 ----
          
          if (DEBUG) 
!           cerr << "location: s == " << s << endl;
  
          if (s > -1)
***************
*** 1458,1462 ****
          
              if (DEBUG)
!               cerr << "On segment: == " << bpp.first.b << endl << flush;
              return bpp;
  
--- 1457,1461 ----
          
              if (DEBUG)
!               cerr << "On segment: == " << bpp.first.b << endl;
              return bpp;
  
***************
*** 1495,1499 ****
        cerr << "ERROR! In Reg_Cl_Plane_Curve::intersection_points():\n"
             << "Path argument p is non-linear. "
!            << "Returning INVALID_BOOL_POINT_PAIR.\n\n" << flush;
        return INVALID_BOOL_POINT_PAIR;
      }
--- 1494,1498 ----
        cerr << "ERROR! In Reg_Cl_Plane_Curve::intersection_points():\n"
             << "Path argument p is non-linear. "
!            << "Returning INVALID_BOOL_POINT_PAIR.\n\n";
        return INVALID_BOOL_POINT_PAIR;
      }
***************
*** 1837,1841 ****
      angle = fmod(angle, 360);
  
!     if (angle != 0)
        {
            Point normal = ptr->get_normal();
--- 1836,1840 ----
      angle = fmod(angle, 360);
  
!     if (angle != ZERO_REAL)
        {
            Point normal = ptr->get_normal();
***************
*** 1957,1966 ****
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!         if (angle != 0)
             {
                Point normal = get_normal();
                p.rotate(center, normal, angle);
  
!            }  /* |if (angle != 0)|  */
  
          return p;
--- 1956,1965 ----
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!         if (angle != ZERO_REAL)
             {
                Point normal = get_normal();
                p.rotate(center, normal, angle);
  
!            }  /* |if (angle != ZERO_REAL)|  */
  
          return p;
***************
*** 2081,2090 ****
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!         if (angle != 0)
             {
                Point normal = get_normal();
                p.rotate(center, normal, angle);
  
!            }  /* |if (angle != 0)|  */
  
          return p;
--- 2080,2089 ----
  @<Define |Reg_Cl_Plane_Curve| functions@>=
  
!         if (angle != ZERO_REAL)
             {
                Point normal = get_normal();
                p.rotate(center, normal, angle);
  
!            }  /* |if (angle != ZERO_REAL)|  */
  
          return p;
diff -rc2P 3DLDF-2.0.2/src/cylinder.web 3DLDF-2.0.3/src/cylinder.web
*** 3DLDF-2.0.2/src/cylinder.web	Wed Nov  6 20:56:26 2013
--- 3DLDF-2.0.3/src/cylinder.web	Thu Dec 12 20:18:05 2013
***************
*** 280,290 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q **** (4) WARNING:  |options == 0|.@> 
! @ WARNING:  |options == 0|.
  \initials{LDF 2006.11.06.}
  
  @<Define |Cylinder| functions@>=
  
!     if (options == 0)
      {  
           cerr_strm << "WARNING!  In `Cylinder::set()':"
--- 280,290 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q **** (4) WARNING:  |options == static_cast<Cylinder_Set_Option_Struct*>(0)|.@> 
! @ WARNING:  |options == static_cast<Cylinder_Set_Option_Struct*>(0)|.
  \initials{LDF 2006.11.06.}
  
  @<Define |Cylinder| functions@>=
  
!     if (options == static_cast<Cylinder_Set_Option_Struct*>(0))
      {  
           cerr_strm << "WARNING!  In `Cylinder::set()':"
***************
*** 299,303 ****
           return 1;
           
!     }  /* |if (options == 0)|  */
  
  
--- 299,303 ----
           return 1;
           
!     }  /* |if (options == static_cast<Cylinder_Set_Option_Struct*>(0))|  */
  
  
***************
*** 308,316 ****
  @<Define |Cylinder| functions@>=
  
!     if (options->center != 0)
      {
          center = *options->center;
  
!     }  /* |if (options->center == 0)|  */
    
  
--- 308,316 ----
  @<Define |Cylinder| functions@>=
  
!     if (options->center != static_cast<Point*>(0))
      {
          center = *options->center;
  
!     }  /* |if (options->center == static_cast<Point*>(0))|  */
    
  
***************
*** 321,329 ****
  @<Define |Cylinder| functions@>=
  
!     if (options->direction != 0)
      {
          direction = *options->direction;
  
!     }  /* |if (options->direction == 0)|  */
    
  
--- 321,329 ----
  @<Define |Cylinder| functions@>=
  
!     if (options->direction != static_cast<Point*>(0))
      {
          direction = *options->direction;
  
!     }  /* |if (options->direction == static_cast<Point*>(0))|  */
    
  
***************
*** 413,417 ****
          ellipses.push_back(e);
  
!         if (options->axis_y != 0)
              axis_y = *options->axis_y;
          else
--- 413,417 ----
          ellipses.push_back(e);
  
!         if (options->axis_y != static_cast<real*>(0))
              axis_y = *options->axis_y;
          else
***************
*** 452,456 ****
          center.set(0, .5 * axis_y, 0);
  
!         if (options->center != 0)
             shift(*options->center - center);
  
--- 452,456 ----
          center.set(0, .5 * axis_y, 0);
  
!         if (options->center != static_cast<Point*>(0))
             shift(*options->center - center);
  
***************
*** 470,474 ****
  
  
!         if (options->radius != 0)
             radius = *options->radius;
          else if (   (options->axis_x && !options->axis_z)
--- 470,474 ----
  
  
!         if (options->radius != static_cast<real*>(0))
             radius = *options->radius;
          else if (   (options->axis_x && !options->axis_z)
***************
*** 548,552 ****
          center.set(0, .5 * axis_y, 0);
  
!         if (options->center != 0)
             shift(*options->center - center);
  
--- 548,552 ----
          center.set(0, .5 * axis_y, 0);
  
!         if (options->center != static_cast<Point*>(0))
             shift(*options->center - center);
  
***************
*** 850,854 ****
  @q **** (4)@> 
     
!     if (type == CIRCULAR_CYLINDER_TYPE && base != 0)
      {
           p = create_new<Point>(0);
--- 850,854 ----
  @q **** (4)@> 
     
!     if (type == CIRCULAR_CYLINDER_TYPE && base != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 862,866 ****
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CYLINDER_TYPE && base != 0)
      {
           p = create_new<Point>(0);
--- 862,866 ----
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CYLINDER_TYPE && base != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 905,909 ****
      Point* p;
  
!     if (type == CIRCULAR_CYLINDER_TYPE && cap != 0)
      {
           p = create_new<Point>(0);
--- 905,909 ----
      Point* p;
  
!     if (type == CIRCULAR_CYLINDER_TYPE && cap != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
***************
*** 916,920 ****
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CYLINDER_TYPE && cap != 0)
      {
           p = create_new<Point>(0);
--- 916,920 ----
  @q **** (4)@> 
  
!     else if (type == ELLIPTICAL_CYLINDER_TYPE && cap != static_cast<Path*>(0))
      {
           p = create_new<Point>(0);
diff -rc2P 3DLDF-2.0.2/src/dashptrn.web 3DLDF-2.0.3/src/dashptrn.web
*** 3DLDF-2.0.2/src/dashptrn.web	Wed Nov  6 20:56:26 2013
--- 3DLDF-2.0.3/src/dashptrn.web	Wed Dec 11 18:38:32 2013
***************
*** 234,238 ****
        cerr << "ERROR! In Dash_Pattern::show():" << endl 
             << "Invalid type: " << type << endl
!            << "Will return `false'." << endl << flush;
        return_value = false;
  
--- 234,238 ----
        cerr << "ERROR! In Dash_Pattern::show():" << endl 
             << "Invalid type: " << type << endl
!            << "Will return `false'." << endl;
        return_value = false;
  
diff -rc2P 3DLDF-2.0.2/src/ddchdrn.web 3DLDF-2.0.3/src/ddchdrn.web
*** 3DLDF-2.0.2/src/ddchdrn.web	Thu Nov  7 13:36:08 2013
--- 3DLDF-2.0.3/src/ddchdrn.web	Thu Dec 12 19:36:23 2013
***************
*** 258,262 ****
     bool DEBUG = false; /* |true| */
     if (DEBUG)
!       cerr << "Entering Dodecahedron::Dodecahedron().\n" << flush;
  
  
--- 258,262 ----
     bool DEBUG = false; /* |true| */
     if (DEBUG)
!       cerr << "Entering Dodecahedron::Dodecahedron().\n";
  
  
***************
*** 377,381 ****
      Transform t = center.shift(-center);
  
!     if (angle_x != 0 || angle_y != 0 || angle_z != 0)
        t.rotate(angle_x, angle_y, angle_z);
  
--- 377,381 ----
      Transform t = center.shift(-center);
  
!     if (angle_x != ZERO_REAL || angle_y != ZERO_REAL || angle_z != ZERO_REAL)
        t.rotate(angle_x, angle_y, angle_z);
  
***************
*** 388,392 ****
  
      if (DEBUG)
!           cerr << "Exiting Dodecahedron::Dodecahedron().\n" << flush;
      return;
  }
--- 388,392 ----
  
      if (DEBUG)
!           cerr << "Exiting Dodecahedron::Dodecahedron().\n";
      return;
  }
***************
*** 579,587 ****
          {
            for (int j = 0; j < 5; j++)
!             if (pents[i]->get_point(j).get_y() != 0)
                {
                  cerr << "ERROR! In Dodecahedron::get_net():\n"
                    << "y-coordinate != 0!\n"
!                     << "You'd better fix this!\n\n" << flush;
                }
          }
--- 579,587 ----
          {
            for (int j = 0; j < 5; j++)
!             if (pents[i]->get_point(j).get_y() != ZERO_REAL)
                {
                  cerr << "ERROR! In Dodecahedron::get_net():\n"
                    << "y-coordinate != 0!\n"
!                     << "You'd better fix this!\n\n";
                }
          }
***************
*** 608,616 ****
      {
        for (int j = 0; j < 5; j++)
!         if (pents[i]->get_point(j).get_y() != 0)
            {
              cerr << "ERROR! In Dodecahedron::get_net():\n"
                   << "y-coordinate != 0!\n"
!                  << "You'd better fix this!\n\n" << flush;
            }
      }
--- 608,616 ----
      {
        for (int j = 0; j < 5; j++)
!         if (pents[i]->get_point(j).get_y() != ZERO_REAL)
            {
              cerr << "ERROR! In Dodecahedron::get_net():\n"
                   << "y-coordinate != 0!\n"
!                  << "You'd better fix this!\n\n";
            }
      }
***************
*** 769,775 ****
  @q ****** (6) Preliminaries.@>   
  
! #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
! #endif /* |DEBUG_COMPILE|  */@; 
  
     stringstream cerr_strm;
--- 769,773 ----
  @q ****** (6) Preliminaries.@>   
  
!    volatile bool DEBUG = false; /* |true| */ @; 
  
     stringstream cerr_strm;
***************
*** 786,789 ****
--- 784,799 ----
                                                      &warning_stop_value);
  
+ #if DEBUG_COMPILE
+    if (DEBUG)
+    {
+        cerr_mutex.lock();
+        cerr << "Entering `Dodecahedron::get_tabs'."
+             << endl;
+        cerr_mutex.unlock(); 
+ 
+    }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
     using namespace Scan_Parse;
  
***************
*** 849,852 ****
--- 859,869 ----
  @ First tab on |rpv[1]|.
  
+ \LOG
+ \initials{LDF 2013.11.10.}
+ @:BUG FIX@> BUG FIX:  Now casting final argument of |Path::set| to |Point *|.
+ For some reason, this worked when |real| was a ``|typedef|'' for |double|, 
+ but caused a run-time error when it was changed to |float|.
+ \ENDLOG
+ 
  @<Define |Dodecahedron| functions@>=
  
***************
*** 874,878 ****
  
     tab.set("--", true, &corner[0], &mid_pt[0], &corner[1], &mid_pt[1],
!          &corner[2], &mid_pt[2], &corner[3], &mid_pt[3], 0);
  
     tab_vector.push_back(tab);
--- 891,895 ----
  
     tab.set("--", true, &corner[0], &mid_pt[0], &corner[1], &mid_pt[1],
!          &corner[2], &mid_pt[2], &corner[3], &mid_pt[3], static_cast<Point*>(0));
  
     tab_vector.push_back(tab);
***************
*** 1669,1682 ****
    Dodecahedron* dodecahedron_reflection = static_cast<Dodecahedron*>(v);  
  
! @q *** (3) If |dodecahedron_reflection == 0|, try to allocate memory @>
! @q *** (3) on the free store for it.                           @> 
  
! @ If |dodecahedron_reflection == 0|, try to allocate memory 
! on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Dodecahedron| functions@>=
  
!  if (dodecahedron_reflection == 0)
   {
    try
--- 1686,1699 ----
    Dodecahedron* dodecahedron_reflection = static_cast<Dodecahedron*>(v);  
  
! @q *** (3) If |dodecahedron_reflection == static_cast<Dodecahedron*>(0)|, @>
! @q *** (3) try to allocate memory on the free store for it.               @> 
  
! @ If |dodecahedron_reflection == static_cast<Dodecahedron*>(0)|, 
! try to allocate memory on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Dodecahedron| functions@>=
  
!  if (dodecahedron_reflection == static_cast<Dodecahedron*>(0))
   {
    try
***************
*** 1713,1717 ****
  @q *** (3).@> 
  
!   } /* |if (dodecahedron_reflection == 0)|  */
  
  @q *** (3) Call |Polyhedron::reflect_in()|.@> 
--- 1730,1734 ----
  @q *** (3).@> 
  
!   } /* |if (dodecahedron_reflection == static_cast<Dodecahedron*>(0))|  */
  
  @q *** (3) Call |Polyhedron::reflect_in()|.@> 
diff -rc2P 3DLDF-2.0.2/src/ellipses.web 3DLDF-2.0.3/src/ellipses.web
*** 3DLDF-2.0.2/src/ellipses.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/ellipses.web	Thu Dec 12 19:40:42 2013
***************
*** 310,314 ****
              << nnumber_of_points << "." << endl 
                << "Using default instead: " << DEFAULT_NUMBER_OF_POINTS 
!                 << endl << flush;
            number_of_points = DEFAULT_NUMBER_OF_POINTS; 
        }
--- 310,314 ----
              << nnumber_of_points << "." << endl 
                << "Using default instead: " << DEFAULT_NUMBER_OF_POINTS 
!                 << endl;
            number_of_points = DEFAULT_NUMBER_OF_POINTS; 
        }
***************
*** 323,327 ****
      Transform t;
  
!     if (angle_x != 0 || angle_y != 0 || angle_z != 0)
        t.rotate(angle_x, angle_y, angle_z);
      
--- 323,327 ----
      Transform t;
  
!     if (angle_x != ZERO_REAL || angle_y != ZERO_REAL || angle_z != ZERO_REAL)
        t.rotate(angle_x, angle_y, angle_z);
      
***************
*** 484,493 ****
  
  
!    if (temp_pt.get_x() < 0 || temp_pt.get_z() != 0)
           temp_center *= normal *= temp_pt *= t.rotate(0, 2 * angle);
  
  @q **** (4)@> 
  
!    if (temp_pt.get_x() < 0 || temp_pt.get_z() != 0)
        {
            cerr_strm << thread_name << "ERROR!  In `Ellipse' constructor:"
--- 484,493 ----
  
  
!    if (temp_pt.get_x() < ZERO_REAL || temp_pt.get_z() != ZERO_REAL)
           temp_center *= normal *= temp_pt *= t.rotate(0, 2 * angle);
  
  @q **** (4)@> 
  
!    if (temp_pt.get_x() < ZERO_REAL || temp_pt.get_z() != ZERO_REAL)
        {
            cerr_strm << thread_name << "ERROR!  In `Ellipse' constructor:"
***************
*** 504,508 ****
            focus_0 = focus_1 = INVALID_POINT;
                    
!       }  /* |if (temp_pt.get_x() < 0 || temp_pt.get_z() != 0)|  */
    
     else 
--- 504,508 ----
            focus_0 = focus_1 = INVALID_POINT;
                    
!       }  /* |if (temp_pt.get_x() < ZERO_REAL || temp_pt.get_z() != ZERO_REAL)|  */
    
     else 
***************
*** 661,664 ****
--- 661,665 ----
    Ellipse* p = create_new<Ellipse>(0);
    *p = *this;
+ 
    return static_cast<Shape*>(p);
  }
***************
*** 736,749 ****
    Ellipse* ellipse_reflection = static_cast<Ellipse*>(v);  
  
! @q *** (3) If |ellipse_reflection == 0|, try to allocate memory @>
! @q *** (3) on the free store for it.                           @> 
  
! @ If |ellipse_reflection == 0|, try to allocate memory 
! on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Ellipse| functions@>=
  
!  if (ellipse_reflection == 0)
   {
    try
--- 737,750 ----
    Ellipse* ellipse_reflection = static_cast<Ellipse*>(v);  
  
! @q *** (3) If |ellipse_reflection == static_cast<Ellipse*>(0)|, @>
! @q *** (3) try to allocate memory on the free store for it.     @> 
  
! @ If |ellipse_reflection == static_cast<Ellipse*>(0)|, 
! try to allocate memory on the free store for it.                            
  \initials{LDF 2004.10.12.}
  
  @<Define |Ellipse| functions@>=
  
!  if (ellipse_reflection == static_cast<Ellipse*>(0))
   {
    try
***************
*** 780,784 ****
  @q *** (3).@> 
  
!   } /* |if (ellipse_reflection == 0)|  */
  
  @q *** (3) Call |Reg_Cl_Plane_Curve::reflect_in()|.@> 
--- 781,785 ----
  @q *** (3).@> 
  
!   } /* |if (ellipse_reflection == static_cast<Ellipse*>(0))|  */
  
  @q *** (3) Call |Reg_Cl_Plane_Curve::reflect_in()|.@> 
***************
*** 970,974 ****
  @q *** (3).@> 
  
!    if (v == 0)
        {
            cerr_strm << thread_name << "ERROR!  In `Ellipse::reflect_off()':"
--- 971,975 ----
  @q *** (3).@> 
  
!    if (v == static_cast<void*>(0))
        {
            cerr_strm << thread_name << "ERROR!  In `Ellipse::reflect_off()':"
***************
*** 982,986 ****
            return 1;
  
!       } /* |if (v == 0)|  */
  
  
--- 983,987 ----
            return 1;
  
!       } /* |if (v == static_cast<void*>(0))|  */
  
  
***************
*** 1313,1317 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 1314,1318 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
***************
*** 1499,1503 ****
                 << "get_normal() returned INVALID_POINT." << endl
                 << "*this is non-planar. Returning false."
!             << endl << endl << flush;
          return false;
      }
--- 1500,1504 ----
                 << "get_normal() returned INVALID_POINT." << endl
                 << "*this is non-planar. Returning false."
!             << endl << endl;
          return false;
      }
***************
*** 1536,1540 ****
          if (DEBUG) 
            cerr << "ERROR! In is_elliptical():\n"
!             << "Rotation failed.\nReturning false\n\n" << flush;
          return false;
      }
--- 1537,1541 ----
          if (DEBUG) 
            cerr << "ERROR! In is_elliptical():\n"
!             << "Rotation failed.\nReturning false\n\n";
          return false;
      }
***************
*** 1551,1556 ****
    if (DEBUG)
      {
!       cerr << "a == " << a << endl << flush;
!       cerr << "b == " << b << endl << flush;
      }
  
--- 1552,1557 ----
    if (DEBUG)
      {
!       cerr << "a == " << a << endl;
!       cerr << "b == " << b << endl;
      }
  
***************
*** 1566,1573 ****
        if (DEBUG)
          {
!           cerr << "Point " << i << ": " << endl << flush;
            (**iter).show("iter:");
!           cerr << "x == " << x << endl << flush;
!           cerr << "z == " << z << endl << flush;
          }
        
--- 1567,1574 ----
        if (DEBUG)
          {
!           cerr << "Point " << i << ": " << endl;
            (**iter).show("iter:");
!           cerr << "x == " << x << endl;
!           cerr << "z == " << z << endl;
          }
        
***************
*** 1575,1579 ****
  
        if (DEBUG)       
!         cerr << "r == " << r << endl << flush;
        
        if (fabs(r - 1) > Point::epsilon())
--- 1576,1580 ----
  
        if (DEBUG)       
!         cerr << "r == " << r << endl;
        
        if (fabs(r - 1) > Point::epsilon())
***************
*** 1581,1585 ****
            if (DEBUG) 
              cerr << "Point " << i << " doesn't satisfy ellipse equation.\n"
!                  << "Returning false.\n\n" << flush;
            return false;
          }
--- 1582,1586 ----
            if (DEBUG) 
              cerr << "Point " << i << " doesn't satisfy ellipse equation.\n"
!                  << "Returning false.\n\n";
            return false;
          }
***************
*** 1589,1593 ****
    if (DEBUG) 
      cerr << "Exiting Ellipse::is_elliptical().  Returning true."
!          << endl << endl << flush;
    return true;
  
--- 1590,1594 ----
    if (DEBUG) 
      cerr << "Exiting Ellipse::is_elliptical().  Returning true."
!          << endl << endl;
    return true;
  
***************
*** 1614,1618 ****
  
  #if DEBUG_COMPILE
!   bool DEBUG = true; /* |false| */ @; 
     if (DEBUG)
       {
--- 1615,1619 ----
  
  #if DEBUG_COMPILE
!   bool DEBUG = false; /* |true| */ @; 
     if (DEBUG)
       {
***************
*** 1728,1733 ****
        cerr << "ERROR! In Ellipse::solve().\n"
          << "Invalid character for axis_unknown: "
!           << axis_unknown << "\nReturning INVALID_REAL_PAIR.\n\n"
!             << flush;
        return INVALID_REAL_PAIR;
      }
--- 1729,1733 ----
        cerr << "ERROR! In Ellipse::solve().\n"
          << "Invalid character for axis_unknown: "
!           << axis_unknown << "\nReturning INVALID_REAL_PAIR.\n\n";
        return INVALID_REAL_PAIR;
      }
***************
*** 2388,2393 ****
            cerr << "ERROR! In `Ellipse::location':"
                 << endl 
!                << "Ellipse is non-elliptical. Returning -3.\n\n"
!                << flush;
            return -3;
        }
--- 2388,2393 ----
            cerr << "ERROR! In `Ellipse::location':"
                 << endl 
!                << "Ellipse is non-elliptical. Returning -3.\n\n";
! 
            return -3;
        }
***************
*** 2397,2401 ****
            cerr  << "WARNING! In Ellipse::location():\n"
                  << "Point doesn't lie in plane of Ellipse.\n"
!                 << "Returning -2.\n\n" << flush;
            return -2;
        }
--- 2397,2402 ----
            cerr  << "WARNING! In Ellipse::location():\n"
                  << "Point doesn't lie in plane of Ellipse.\n"
!                 << "Returning -2.\n\n";
! 
            return -2;
        }
***************
*** 2783,2787 ****
      if (DEBUG)
        {
!         cerr << "Ellipses are coplanar.\n" << flush;
        }
  
--- 2784,2788 ----
      if (DEBUG)
        {
!         cerr << "Ellipses are coplanar.\n";
        }
  
***************
*** 2863,2867 ****
    {
      if (DEBUG)
!       cerr << "Centers and axis orientation are the same.\n" << flush;
  
  /* \initials{LDF 2002.04.14.}
--- 2864,2868 ----
    {
      if (DEBUG)
!       cerr << "Centers and axis orientation are the same.\n";
  
  /* \initials{LDF 2002.04.14.}
***************
*** 2923,2927 ****
        {
          if (DEBUG)
!           cerr << "i == " << i << endl << flush;
  
          if (i != 0)
--- 2924,2928 ----
        {
          if (DEBUG)
!           cerr << "i == " << i << endl;
  
          if (i != 0)
***************
*** 2955,2960 ****
              cerr << "In Ellipse::intersection_points(Ellipse).\n"
                   << "This can't happen (this)!\n"
!                  << "Will try to continue.\n\n" 
!                  << flush;
              pt2 = INVALID_POINT;
            }
--- 2956,2961 ----
              cerr << "In Ellipse::intersection_points(Ellipse).\n"
                   << "This can't happen (this)!\n"
!                  << "Will try to continue.\n\n";
! 
              pt2 = INVALID_POINT;
            }
***************
*** 2979,2984 ****
            {
              cerr << "In Ellipse::intersection_points(Ellipse).\n"
!               << "This can't happen (e)!\nWill try to continue.\n\n"
!               << flush;
              pt3 = INVALID_POINT;
            }
--- 2980,2985 ----
            {
              cerr << "In Ellipse::intersection_points(Ellipse).\n"
!               << "This can't happen (e)!\nWill try to continue.\n\n";
! 
              pt3 = INVALID_POINT;
            }
***************
*** 3011,3015 ****
      if (DEBUG)
        {
!         cerr << "congruent_flag == " << congruent_flag << endl << flush;
        }
  
--- 3012,3016 ----
      if (DEBUG)
        {
!         cerr << "congruent_flag == " << congruent_flag << endl;
        }
  
***************
*** 3024,3029 ****
      else if (DEBUG)
        {
!         cerr << "All five points are not on both ellipses.\n"
!           << flush;
        }
  
--- 3025,3030 ----
      else if (DEBUG)
        {
!         cerr << "All five points are not on both ellipses.\n";
! 
        }
  
***************
*** 3053,3057 ****
          if (DEBUG)
            {
!             cerr << "Shifting copy to origin_pt.\n" << flush;
            }
            
--- 3054,3058 ----
          if (DEBUG)
            {
!             cerr << "Shifting copy to origin_pt.\n";
            }
            
***************
*** 3064,3068 ****
      else if (DEBUG)
        {
!         cerr << "copy is already at origin_pt.\n" << flush;
        }
  
--- 3065,3069 ----
      else if (DEBUG)
        {
!         cerr << "copy is already at origin_pt.\n";
        }
  
***************
*** 3096,3130 ****
  const unsigned short OTHER = 3;
  #endif 
! if (normal_x == 0 && normal_y == 0 && normal_z == 0)
    {
      cerr << "ERROR! In Ellipse::intersection_points():\n"
        << "Normal == 0. "
!         << "Returning INVALID_BOOL_POINT_QUADRUPLE\n\n"
!           << flush;
      return INVALID_BOOL_POINT_QUADRUPLE;
    }
            
! else if (normal_x == 0 && normal_y == 0) /* Ellipse lies in a plane
                                              parallel to x-y plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to x-y plane\n"
!         << flush;
      orientation = X_Y;
    }
  
! else if (normal_x == 0 && normal_z == 0) /* Ellipse lies in a plane
                                              parallel to x-z plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to x-z plane\n" << flush;
      orientation = X_Z;      
    }
  
! else if (normal_z == 0 && normal_y == 0) /* Ellipse lies in a plane 
                                              parallel to z-y plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to z-y plane\n" << flush;
      orientation = Z_Y;
    }
--- 3097,3131 ----
  const unsigned short OTHER = 3;
  #endif 
! if (normal_x == ZERO_REAL && normal_y == ZERO_REAL && normal_z == ZERO_REAL)
    {
      cerr << "ERROR! In Ellipse::intersection_points():\n"
        << "Normal == 0. "
!         << "Returning INVALID_BOOL_POINT_QUADRUPLE\n\n";
! 
      return INVALID_BOOL_POINT_QUADRUPLE;
    }
            
! else if (normal_x == ZERO_REAL && normal_y == ZERO_REAL) /* Ellipse lies in a plane
                                              parallel to x-y plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to x-y plane\n";
! 
      orientation = X_Y;
    }
  
! else if (normal_x == ZERO_REAL && normal_z == ZERO_REAL) /* Ellipse lies in a plane
                                              parallel to x-z plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to x-z plane\n";
      orientation = X_Z;      
    }
  
! else if (normal_z == ZERO_REAL && normal_y == ZERO_REAL) /* Ellipse lies in a plane 
                                              parallel to z-y plane. */
    {
      if (DEBUG)
!       cerr << "Ellipse lies in a plane parallel to z-y plane\n";
      orientation = Z_Y;
    }
***************
*** 3133,3139 ****
    {
      if (DEBUG)
!       cerr << "Ellipse doesn't lie in a plane parallel to a major plane.\n"
!         << flush;
!     
      /* Put it in x-z plane. */
  
--- 3134,3139 ----
    {
      if (DEBUG)
!       cerr << "Ellipse doesn't lie in a plane parallel to a major plane.\n";
! 
      /* Put it in x-z plane. */
  
***************
*** 3231,3238 ****
      if (DEBUG)
        {
!         cerr << "a == " << a << endl << flush;
!         cerr << "b == " << b << endl << flush;
!         cerr << "c == " << c << endl << flush;
!         cerr << "d == " << d << endl << flush;
        }
  
--- 3231,3238 ----
      if (DEBUG)
        {
!         cerr << "a == " << a << endl;
!         cerr << "b == " << b << endl;
!         cerr << "c == " << c << endl;
!         cerr << "d == " << d << endl;
        }
  
***************
*** 3244,3251 ****
      if (DEBUG)
        {
!         cerr << "aa == " << aa << endl << flush;
!         cerr << "bb == " << bb << endl << flush;
!         cerr << "cc == " << cc << endl << flush;
!         cerr << "dd == " << dd << endl << flush;
        }
  
--- 3244,3251 ----
      if (DEBUG)
        {
!         cerr << "aa == " << aa << endl;
!         cerr << "bb == " << bb << endl;
!         cerr << "cc == " << cc << endl;
!         cerr << "dd == " << dd << endl;
        }
  
***************
*** 3262,3270 ****
      if (DEBUG)
        {
!         cerr << "numerator == " << numerator << endl << flush;
!         cerr << "denominator == " << denominator << endl << flush;
        }
      
!     if (denominator == 0)
        {
          if (DEBUG)
--- 3262,3270 ----
      if (DEBUG)
        {
!         cerr << "numerator == " << numerator << endl;
!         cerr << "denominator == " << denominator << endl;
        }
      
!     if (denominator == ZERO_REAL)
        {
          if (DEBUG)
***************
*** 3289,3293 ****
      if (DEBUG)
        {
!         cerr << "x == " << x << endl << flush;
          cerr << "y coordinate:\n";
        }
--- 3289,3293 ----
      if (DEBUG)
        {
!         cerr << "x == " << x << endl;
          cerr << "y coordinate:\n";
        }
***************
*** 3298,3306 ****
      if (DEBUG)
        {
!         cerr << "numerator == " << numerator << endl << flush;
!         cerr << "denominator == " << denominator << endl << flush;
        }
  
!     if (denominator == 0)
        {
          if (DEBUG)
--- 3298,3306 ----
      if (DEBUG)
        {
!         cerr << "numerator == " << numerator << endl;
!         cerr << "denominator == " << denominator << endl;
        }
  
!     if (denominator == ZERO_REAL)
        {
          if (DEBUG)
***************
*** 3325,3329 ****
      if (DEBUG)
        {
!         cerr << "y == " << y << endl << flush;
        }
  
--- 3325,3329 ----
      if (DEBUG)
        {
!         cerr << "y == " << y << endl;
        }
  
***************
*** 3349,3355 ****
        {
          pt20.set( x,  y, 0);
!         pt21.set(-x, -y, 0) ;       
   
!         if (y != 0 && x != 0)
            {
              pt22.set( x, -y, 0);
--- 3349,3355 ----
        {
          pt20.set( x,  y, 0);
!         pt21.set(-x, -y, 0);       
   
!         if (y != ZERO_REAL && x != ZERO_REAL)
            {
              pt22.set( x, -y, 0);
***************
*** 3367,3371 ****
          pt21.set(-x, 0, -y); 
  
!         if (y != 0 && x != 0)
            {
              pt22.set( x, 0, -y);
--- 3367,3371 ----
          pt21.set(-x, 0, -y); 
  
!         if (y != ZERO_REAL && x != ZERO_REAL)
            {
              pt22.set( x, 0, -y);
***************
*** 3383,3387 ****
          pt21.set(0, -y, -x); 
          
!         if (x != 0 && y != 0)
            {
              pt22.set(0,  y, -x);
--- 3383,3387 ----
          pt21.set(0, -y, -x); 
          
!         if (x != ZERO_REAL && y != ZERO_REAL)
            {
              pt22.set(0,  y, -x);
***************
*** 3399,3404 ****
               << "This can't happen! orientation has invalid value: "
               << orientation << endl
!              << "Will to try to continue.\n\n" 
!              << flush;
        }
  
--- 3399,3404 ----
               << "This can't happen! orientation has invalid value: "
               << orientation << endl
!              << "Will to try to continue.\n\n";
! 
        }
  
***************
*** 3426,3435 ****
  
          if (DEBUG)
!           cerr << "ss_copy == " << ss_copy << endl << flush;
  
          ss_e = e.location(pt20);
  
          if (DEBUG)
!           cerr << "ss_e == " << ss_e << endl << flush;
        }
  
--- 3426,3435 ----
  
          if (DEBUG)
!           cerr << "ss_copy == " << ss_copy << endl;
  
          ss_e = e.location(pt20);
  
          if (DEBUG)
!           cerr << "ss_e == " << ss_e << endl;
        }
  
***************
*** 3521,3530 ****
      cerr << "In Ellipse::intersection_points():\n"
           << "Searching for Ellipse intersections. "
!          << "This can take some time...\n\n" << flush;
  
      for (real i = 0; i < 360; i += .5)
        {
          if (DEBUG)
!           cerr << "i == " << i << endl << flush;
  
          curr_point = copy.angle_point(i);
--- 3521,3530 ----
      cerr << "In Ellipse::intersection_points():\n"
           << "Searching for Ellipse intersections. "
!          << "This can take some time...\n\n";
  
      for (real i = 0; i < 360; i += .5)
        {
          if (DEBUG)
!           cerr << "i == " << i << endl;
  
          curr_point = copy.angle_point(i);
***************
*** 3535,3539 ****
  
          if (DEBUG) 
!           cerr << "curr_location == " << curr_location << endl << flush;
  
          if (curr_location == 0)
--- 3535,3539 ----
  
          if (DEBUG) 
!           cerr << "curr_location == " << curr_location << endl;
  
          if (curr_location == 0)
***************
*** 3555,3559 ****
            } /* |if|.  End of ``Found an intersection point''.  */
  
!         else if (i == 0)
            {
              location_switch = curr_location;
--- 3555,3559 ----
            } /* |if|.  End of ``Found an intersection point''.  */
  
!         else if (i == ZERO_REAL)
            {
              location_switch = curr_location;
***************
*** 3577,3582 ****
                   << "This can't happen! curr_location has bad value: "
                   << curr_location << " "
!                  << "Returning INVALID_BOOL_POINT_QUADRUPLE\n\n"
!                  << flush;
              return INVALID_BOOL_POINT_QUADRUPLE;
            }
--- 3577,3582 ----
                   << "This can't happen! curr_location has bad value: "
                   << curr_location << " "
!                  << "Returning INVALID_BOOL_POINT_QUADRUPLE\n\n";
! 
              return INVALID_BOOL_POINT_QUADRUPLE;
            }
***************
*** 3587,3595 ****
                {
                  cerr << "Found a transition!\n";
!                 cerr << "i == " << i << endl << flush;
!                 cerr << "save_angle == " << save_angle << endl << flush;
!                 cerr << "curr_location == " << curr_location << endl << flush;
                  cerr << "location_switch == "
!                   << location_switch << endl << flush;
                }
              if (location_switch == 1)
--- 3587,3595 ----
                {
                  cerr << "Found a transition!\n";
!                 cerr << "i == " << i << endl;
!                 cerr << "save_angle == " << save_angle << endl;
!                 cerr << "curr_location == " << curr_location << endl;
                  cerr << "location_switch == "
!                   << location_switch << endl;
                }
              if (location_switch == 1)
***************
*** 3644,3649 ****
                           << "This can't happen! Invalid value for curr_location: "
                           << curr_location 
!                          << "\nReturning INVALID_BOOL_POINT_QUADRUPLE.\n\n"
!                          << flush;
                      return INVALID_BOOL_POINT_QUADRUPLE;
                    }
--- 3644,3649 ----
                           << "This can't happen! Invalid value for curr_location: "
                           << curr_location 
!                          << "\nReturning INVALID_BOOL_POINT_QUADRUPLE.\n\n";
! 
                      return INVALID_BOOL_POINT_QUADRUPLE;
                    }
***************
*** 3655,3659 ****
      
            cerr << "Finished searching for Ellipse intersections."
!                << endl << endl << flush;
  
   } /*  End of ``Ellipses have different centers 
--- 3655,3659 ----
      
            cerr << "Finished searching for Ellipse intersections."
!                << endl << endl;
  
   } /*  End of ``Ellipses have different centers 
***************
*** 3674,3678 ****
      {
        cerr << "intersection_ctr == "
!         << intersection_ctr << endl << flush;
      }
    
--- 3674,3678 ----
      {
        cerr << "intersection_ctr == "
!         << intersection_ctr << endl;
      }
    
***************
*** 3745,3749 ****
  {
    if (DEBUG)
!     cerr << "Ellipses are in perpendicular or skew planes.\n" << flush;
        
  
--- 3745,3749 ----
  {
    if (DEBUG)
!     cerr << "Ellipses are in perpendicular or skew planes.\n";
        
  
***************
*** 3762,3768 ****
    if (DEBUG)
      {
!       cerr << "bpp.first.b == " << bpp.first.b << endl << flush;
        bpp.first.pt.show("bpp first point:");
!       cerr << "bpp.second.b == " << bpp.second.b << endl << flush;
        bpp.second.pt.show("bpp second point:");
      }
--- 3762,3768 ----
    if (DEBUG)
      {
!       cerr << "bpp.first.b == " << bpp.first.b << endl;
        bpp.first.pt.show("bpp first point:");
!       cerr << "bpp.second.b == " << bpp.second.b << endl;
        bpp.second.pt.show("bpp second point:");
      }
***************
*** 3834,3838 ****
  
  if (DEBUG || verbose)
!      cerr << "Exiting Ellipse::intersection_points(Ellipse)\n" << flush;
       return bpq;
  }
--- 3834,3838 ----
  
  if (DEBUG || verbose)
!      cerr << "Exiting Ellipse::intersection_points(Ellipse)\n";
       return bpq;
  }
***************
*** 3966,3970 ****
                   if (DEBUG) 
                     cerr << "Recalculating linear_eccentricity, "
!                         << "numerical_eccentricity and foci.\n" << flush;
  
                   if (axis_h >= axis_v)
--- 3966,3970 ----
                   if (DEBUG) 
                     cerr << "Recalculating linear_eccentricity, "
!                         << "numerical_eccentricity and foci.\n";
  
                   if (axis_h >= axis_v)
***************
*** 3995,3999 ****
             else if (DEBUG) 
               cerr << "axis_h and axis_v are unchanged.\n"
!                   << "Not recalculating foci.\n" << flush;
  
           } /* |if (is_elliptical())| */
--- 3995,3999 ----
             else if (DEBUG) 
               cerr << "axis_h and axis_v are unchanged.\n"
!                   << "Not recalculating foci.\n";
  
           } /* |if (is_elliptical())| */
***************
*** 4456,4460 ****
      {
        cerr << "Intersection didn't work.\n"
!            << "Returning empty rectangle.\n\n" << flush;
        Rectangle r2;
        return r2;
--- 4456,4460 ----
      {
        cerr << "Intersection didn't work.\n"
!            << "Returning empty rectangle.\n\n";
        Rectangle r2;
        return r2;
***************
*** 4691,4695 ****
                         I don't have a way to do this yet.  
                         \initials{LDF 2003.07.18.}  */
!       cerr << endl << flush;                                            
      }
      
--- 4691,4695 ----
                         I don't have a way to do this yet.  
                         \initials{LDF 2003.07.18.}  */
!       cerr << endl;                                            
      }
      
***************
*** 4712,4716 ****
        cerr << "ERROR! In |Rectangle::out_ellipse()|:\n"
             << "Couldn't find intersection point.\n"
!            << "Returning empty Ellipse.\n\n" << flush;
        Ellipse r;
        return r;
--- 4712,4716 ----
        cerr << "ERROR! In |Rectangle::out_ellipse()|:\n"
             << "Couldn't find intersection point.\n"
!            << "Returning empty Ellipse.\n\n";
        Ellipse r;
        return r;
diff -rc2P 3DLDF-2.0.2/src/ellpsoid.web 3DLDF-2.0.3/src/ellpsoid.web
*** 3DLDF-2.0.2/src/ellpsoid.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/ellpsoid.web	Fri Dec 13 12:43:41 2013
***************
*** 1566,1570 ****
       Pointer_Vector<Bool_Point>* bpv = c->intersection_points(*p, scanner_node);
  
!      if (bpv == 0 || bpv->ctr < 2)
          {
             delete c;
--- 1566,1570 ----
       Pointer_Vector<Bool_Point>* bpv = c->intersection_points(*p, scanner_node);
  
!      if (bpv == static_cast<Pointer_Vector<Bool_Point>*>(0) || bpv->ctr < 2)
          {
             delete c;
***************
*** 2680,2684 ****
         normal = normal_save;
  
!        isect_path[4].set("--", true, &isect_pt[0], &isect_pt[3], &isect_pt[2],&isect_pt[1], 0);  
   
  #if TESTING 
--- 2680,2690 ----
         normal = normal_save;
  
!        isect_path[4].set("--", 
!                          true, 
!                          &isect_pt[0], 
!                          &isect_pt[3], 
!                          &isect_pt[2],
!                          &isect_pt[1], 
!                          static_cast<Point*>(0));  
   
  #if TESTING 
diff -rc2P 3DLDF-2.0.2/src/fcscmnd.w 3DLDF-2.0.3/src/fcscmnd.w
*** 3DLDF-2.0.2/src/fcscmnd.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/fcscmnd.w	Thu Dec 12 14:46:08 2013
***************
*** 84,88 ****
      } 
  
!     @=$$@> = 0;
  
  };
--- 84,88 ----
      } 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 297,301 ****
                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 297,301 ----
                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 325,329 ****
                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 325,329 ----
                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 356,360 ****
                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 356,360 ----
                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 380,384 ****
                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 380,384 ----
                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/figures.web 3DLDF-2.0.3/src/figures.web
*** 3DLDF-2.0.2/src/figures.web	Wed Nov  6 20:54:38 2013
--- 3DLDF-2.0.3/src/figures.web	Thu Dec 12 19:41:15 2013
***************
*** 192,196 ****
  beginfig(Scanner_Node s, unsigned short i, bool silent)
  {
!   bool DEBUG = true; /* |false| */@; 
  
    if (SILENT_GLOBAL)
--- 192,196 ----
  beginfig(Scanner_Node s, unsigned short i, bool silent)
  {
!   bool DEBUG = false; /* |true| */@; 
  
    if (SILENT_GLOBAL)
***************
*** 198,206 ****
    
    if (DEBUG) 
!     cerr << "Entering beginfig(" << i << ")" << endl << flush;
  
    if (!silent)
      cerr << "Beginning figure " << i << "." 
!          << endl << flush;
  
  
--- 198,206 ----
    
    if (DEBUG) 
!     cerr << "Entering beginfig(" << i << ")" << endl;
  
    if (!silent)
      cerr << "Beginning figure " << i << "." 
!          << endl;
  
  
***************
*** 212,220 ****
  
  @<Define figure functions@>=
!   if (current_picture != 0)
      {
        if (DEBUG)
          cerr << "current_picture != 0.  Clearing and freeing the memory."
!              << endl << flush;
        current_picture->clear();
        delete current_picture;
--- 212,220 ----
  
  @<Define figure functions@>=
!   if (current_picture != static_cast<Picture*>(0))
      {
        if (DEBUG)
          cerr << "current_picture != 0.  Clearing and freeing the memory."
!              << endl;
        current_picture->clear();
        delete current_picture;
***************
*** 223,227 ****
      {
        if (DEBUG)
!         cerr << "current_picture == 0." << endl << flush;
      }
  
--- 223,227 ----
      {
        if (DEBUG)
!         cerr << "current_picture == 0." << endl;
      }
  
***************
*** 233,237 ****
  
    if (DEBUG) 
!     cerr << "Exiting beginfig(" << i << ")" << endl << flush;
  
    return;
--- 233,237 ----
  
    if (DEBUG) 
!     cerr << "Exiting beginfig(" << i << ")" << endl;
  
    return;
***************
*** 293,300 ****
          const real min_z_proj, const real max_z_proj)
  {
!   bool DEBUG = true; /* |false| */ @;
  
    if (DEBUG) 
!     cerr << "Entering endfig().\n" << flush;
  
  
--- 293,300 ----
          const real min_z_proj, const real max_z_proj)
  {
!   bool DEBUG = false; /* |true| */ @;
  
    if (DEBUG) 
!     cerr << "Entering endfig().\n";
  
  
***************
*** 307,311 ****
        if (DEBUG)
          cerr << "projection != Projections::suppress. "
!              << "Calling current_picture->output()." << "\n" << flush;
        current_picture->output(s, f, projection, factor, sort_value,
                                do_warnings, 
--- 307,311 ----
        if (DEBUG)
          cerr << "projection != Projections::suppress. "
!              << "Calling current_picture->output()." << "\n";
        current_picture->output(s, f, projection, factor, sort_value,
                                do_warnings, 
***************
*** 318,322 ****
        if (DEBUG)
          cerr << "projection == Projections::suppress. "
!              << "Not calling current_picture->output()." << "\n" << flush;
      }
    
--- 318,322 ----
        if (DEBUG)
          cerr << "projection == Projections::suppress. "
!              << "Not calling current_picture->output()." << "\n";
      }
    
***************
*** 331,335 ****
  
    if (DEBUG) 
!     cerr << "Exiting endfig().\n" << flush;
  
    return;
--- 331,335 ----
  
    if (DEBUG) 
!     cerr << "Exiting endfig().\n";
  
    return;
diff -rc2P 3DLDF-2.0.2/src/gsltmplt.web 3DLDF-2.0.3/src/gsltmplt.web
*** 3DLDF-2.0.2/src/gsltmplt.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/gsltmplt.web	Wed Dec 11 18:38:32 2013
***************
*** 145,156 ****
    if (verbose)
      {
!       cout << "USHORT_SIZE  == " << USHORT_SIZE  << endl << flush;
!       cout << "UINT_SIZE  == " << UINT_SIZE  << endl << flush;
!       cout << "ULONG_SIZE == " << ULONG_SIZE << endl << flush;
!       cout << "ULONG_LONG_SIZE == " << ULONG_LONG_SIZE << endl << flush;
!       cout << "FLT_SIZE  == " << FLT_SIZE  << endl << flush;
!       cout << "DBL_SIZE  == " << DBL_SIZE  << endl << flush;
!       cout << "LONG_DBL_SIZE  == " << LONG_DBL_SIZE  << endl << flush;
!       cout << "Real_SIZE  == " << Real_SIZE  << endl << flush;
      }
  
--- 145,156 ----
    if (verbose)
      {
!       cout << "USHORT_SIZE  == " << USHORT_SIZE  << endl;
!       cout << "UINT_SIZE  == " << UINT_SIZE  << endl;
!       cout << "ULONG_SIZE == " << ULONG_SIZE << endl;
!       cout << "ULONG_LONG_SIZE == " << ULONG_LONG_SIZE << endl;
!       cout << "FLT_SIZE  == " << FLT_SIZE  << endl;
!       cout << "DBL_SIZE  == " << DBL_SIZE  << endl;
!       cout << "LONG_DBL_SIZE  == " << LONG_DBL_SIZE  << endl;
!       cout << "Real_SIZE  == " << Real_SIZE  << endl;
      }
  
***************
*** 195,199 ****
  	   << "as any unsigned integral type.\n"
  	   << "There must be some mistake.\n"
! 	   << "Exiting with return value -1.\n\n" << flush;
        return -1;
      }
--- 195,199 ----
  	   << "as any unsigned integral type.\n"
  	   << "There must be some mistake.\n"
! 	   << "Exiting with return value -1.\n\n";
        return -1;
      }
***************
*** 212,216 ****
             << (MAX_VAL > *rp) << endl
             << "MAX_VAL < *rp == "
!            << (MAX_VAL < *rp) << endl << flush;
      }
  
--- 212,216 ----
             << (MAX_VAL > *rp) << endl
             << "MAX_VAL < *rp == "
!            << (MAX_VAL < *rp) << endl;
      }
  
***************
*** 220,224 ****
        cerr << "ERROR! In System::get_second_largest<Real>():\n"
             << "MAX_VAL == *rp. Exiting with return value 1"
!            << endl << endl << flush;
        exit(1);
      }
--- 220,224 ----
        cerr << "ERROR! In System::get_second_largest<Real>():\n"
             << "MAX_VAL == *rp. Exiting with return value 1"
!            << endl << endl;
        exit(1);
      }
***************
*** 228,232 ****
        cerr << "ERROR! In System::get_second_largest<Real>():\n"
             << "MAX_VAL < *rp. Exiting with return value 1"
!            << endl << endl << flush;
        exit(1);
      }
--- 228,232 ----
        cerr << "ERROR! In System::get_second_largest<Real>():\n"
             << "MAX_VAL < *rp. Exiting with return value 1"
!            << endl << endl;
        exit(1);
      }
***************
*** 242,246 ****
  
    if (verbose)
!     cout << "*ip == " << *ip << endl << flush;
        
    i_type bit_pattern_i_type;
--- 242,246 ----
  
    if (verbose)
!     cout << "*ip == " << *ip << endl;
        
    i_type bit_pattern_i_type;
***************
*** 255,279 ****
  
    if (verbose)
!     cout << "b (MAX_VAL) == " << b << endl << flush;
  
    b = bit_pattern_i_type;
  
    if (verbose)
!     cout << "b (bit_pattern_i_type) == " << b << endl << flush;
  
    result = bit_pattern_i_type ^ *ip;
  
    if (verbose)
!     cout << "result == " << result << endl << flush;
  
    b = result;
  
    if (verbose)
!     cout << "b (result) == " << b << endl << flush;
  
    rp = reinterpret_cast<Real *>(&result);
  
    if (verbose)
!     cout << "*rp == " << *rp << endl << flush;
   }
  
--- 255,279 ----
  
    if (verbose)
!     cout << "b (MAX_VAL) == " << b << endl;
  
    b = bit_pattern_i_type;
  
    if (verbose)
!     cout << "b (bit_pattern_i_type) == " << b << endl;
  
    result = bit_pattern_i_type ^ *ip;
  
    if (verbose)
!     cout << "result == " << result << endl;
  
    b = result;
  
    if (verbose)
!     cout << "b (result) == " << b << endl;
  
    rp = reinterpret_cast<Real *>(&result);
  
    if (verbose)
!     cout << "*rp == " << *rp << endl;
   }
  
***************
*** 288,292 ****
      {
        if (verbose)
!         cout << "i == " << i << endl << flush;
  
  
--- 288,292 ----
      {
        if (verbose)
!         cout << "i == " << i << endl;
  
  
***************
*** 310,314 ****
  	    {
                if (verbose)
!                 cout << "i == " << i << ".  This produces NAN.  Continuing.\n\n" << flush;
  	      continue;
  	    }
--- 310,314 ----
  	    {
                if (verbose)
!                 cout << "i == " << i << ".  This produces NAN.  Continuing.\n\n";
  	      continue;
  	    }
***************
*** 319,328 ****
            if (verbose)
              cout << "bit_pattern_i_type (1 << " << i << ") == " 
!                  << bit_pattern_i_type << endl << flush;
  
  	  b = bit_pattern_i_type;
  
            if (verbose)
!             cout << "b (bit_pattern_i_type) == " << b << endl << flush;
  
  	  result = bit_pattern_i_type ^ *ip;
--- 319,328 ----
            if (verbose)
              cout << "bit_pattern_i_type (1 << " << i << ") == " 
!                  << bit_pattern_i_type << endl;
  
  	  b = bit_pattern_i_type;
  
            if (verbose)
!             cout << "b (bit_pattern_i_type) == " << b << endl;
  
  	  result = bit_pattern_i_type ^ *ip;
***************
*** 330,344 ****
  
            if (verbose)
!             cout << "result == " << result << endl << flush;
  
  	  b = result;
  
            if (verbose)
!             cout << "b (result) == " << b << endl << flush;
  
  	  rp = reinterpret_cast<Real *>(&result);
  
              if (verbose)
!               cout << "*rp == " << *rp << endl << flush;
  
  
--- 330,344 ----
  
            if (verbose)
!             cout << "result == " << result << endl;
  
  	  b = result;
  
            if (verbose)
!             cout << "b (result) == " << b << endl;
  
  	  rp = reinterpret_cast<Real *>(&result);
  
              if (verbose)
!               cout << "*rp == " << *rp << endl;
  
  
***************
*** 346,350 ****
  	    {
                if (verbose)
!                 cout << "*rp <= 0.\nContinuing.\n\n" << flush;
  	      continue;
  	    }
--- 346,350 ----
  	    {
                if (verbose)
!                 cout << "*rp <= 0.\nContinuing.\n\n";
  	      continue;
  	    }
***************
*** 354,358 ****
                if (verbose)
                  cout << "*rp >=  MAX_VAL\nContinuing."
!                      << endl << flush;
  	      continue;
  	    }
--- 354,358 ----
                if (verbose)
                  cout << "*rp >=  MAX_VAL\nContinuing."
!                      << endl;
  	      continue;
  	    }
***************
*** 362,366 ****
                if (verbose)
                  cout << "second_largest_real >= *rp\nContinuing." 
!                      << "\n" << flush;
  	      continue;
  	    } 
--- 362,366 ----
                if (verbose)
                  cout << "second_largest_real >= *rp\nContinuing." 
!                      << "\n";
  	      continue;
  	    } 
***************
*** 371,375 ****
                       << "*rp < MAX_VAL" << endl
                       << "Setting second_largest_real to *rp"
!                      << " and counter to i (" << i << ").\n" << flush;
  
  	      second_largest_real = *rp;
--- 371,375 ----
                       << "*rp < MAX_VAL" << endl
                       << "Setting second_largest_real to *rp"
!                      << " and counter to i (" << i << ").\n";
  
  	      second_largest_real = *rp;
diff -rc2P 3DLDF-2.0.2/src/helices.web 3DLDF-2.0.3/src/helices.web
*** 3DLDF-2.0.2/src/helices.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/helices.web	Thu Dec 12 20:18:51 2013
***************
*** 324,328 ****
  @q **** (4) @>   
  
!    if (option_struct == 0)
        {
            cerr_strm << thread_name << "ERROR!  In 'Helix::set()':"
--- 324,328 ----
  @q **** (4) @>   
  
!    if (option_struct == static_cast<Helix_Set_Option_Struct*>(0))
        {
            cerr_strm << thread_name << "ERROR!  In 'Helix::set()':"
***************
*** 338,342 ****
            return 1;
  
!       }  /* |if (option_struct == 0)|  */      
  
  @q **** (4) @>   
--- 338,342 ----
            return 1;
  
!       }  /* |if (option_struct == static_cast<Helix_Set_Option_Struct*>(0))|  */      
  
  @q **** (4) @>   
***************
*** 344,348 ****
     if (option_struct->center)
        {
!          if (center == 0)
              center = option_struct->center;
           
--- 344,348 ----
     if (option_struct->center)
        {
!          if (center == static_cast<Point*>(0))
              center = option_struct->center;
           
***************
*** 365,369 ****
     if (option_struct->direction)
        {
!          if (direction == 0)
              direction = option_struct->direction;
           
--- 365,369 ----
     if (option_struct->direction)
        {
!          if (direction == static_cast<Point*>(0))
              direction = option_struct->direction;
           
***************
*** 387,391 ****
     if (option_struct->direction_vector)
        {
!          if (direction_vector == 0)
              direction_vector = option_struct->direction_vector;
           
--- 387,391 ----
     if (option_struct->direction_vector)
        {
!          if (direction_vector == static_cast<Pointer_Vector<Point>*>(0))
              direction_vector = option_struct->direction_vector;
           
***************
*** 396,400 ****
             }
  
!          option_struct->direction_vector = 0;
        }
  
--- 396,400 ----
             }
  
!          option_struct->direction_vector = static_cast<Pointer_Vector<Point>*>(0);
        }
  
***************
*** 532,538 ****
         return *this;
  
!     if (h.center != 0)
         {
!           if (center == 0)
               center = create_new<Point>(0);
   
--- 532,538 ----
         return *this;
  
!     if (h.center != static_cast<Point*>(0))
         {
!           if (center == static_cast<Point*>(0))
               center = create_new<Point>(0);
   
***************
*** 540,546 ****
         }
  
!     if (h.direction != 0)
         {
!           if (direction == 0)
               direction = create_new<Point>(0);
   
--- 540,546 ----
         }
  
!     if (h.direction != static_cast<Point*>(0))
         {
!           if (direction == static_cast<Point*>(0))
               direction = create_new<Point>(0);
   
***************
*** 548,554 ****
         }
  
!     if (h.direction_vector != 0)
         {
!           if (direction_vector == 0)
               direction_vector = new Pointer_Vector<Point>; 
   
--- 548,554 ----
         }
  
!     if (h.direction_vector != static_cast<Pointer_Vector<Point>*>(0))
         {
!           if (direction_vector == static_cast<Pointer_Vector<Point>*>(0))
               direction_vector = new Pointer_Vector<Point>; 
   
***************
*** 631,635 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 631,635 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
***************
*** 686,690 ****
  Helix::operator*=(const Transform& t)
  {
!    if (center != 0)
        *center *= t;
  
--- 686,690 ----
  Helix::operator*=(const Transform& t)
  {
!    if (center != static_cast<Point*>(0))
        *center *= t;
  
***************
*** 862,866 ****
  {
  
!     if (center != 0)
         center->shift_times(x, y, z);
  
--- 862,866 ----
  {
  
!     if (center != static_cast<Point*>(0))
         center->shift_times(x, y, z);
  
***************
*** 1015,1019 ****
                f, proj, factor);
  
!    if (center == 0)
        cerr << "center == 0" << endl;
     else
--- 1015,1019 ----
                f, proj, factor);
  
!    if (center == static_cast<Point*>(0))
        cerr << "center == 0" << endl;
     else
***************
*** 1021,1030 ****
  
   
!    if (direction == 0)
        cerr << "direction == 0" << endl;
     else
        direction->show("direction:");
  
!    if (direction_vector == 0)
        cerr << "direction_vector == 0" << endl;
     else
--- 1021,1030 ----
  
   
!    if (direction == static_cast<Point*>(0))
        cerr << "direction == 0" << endl;
     else
        direction->show("direction:");
  
!    if (direction_vector == static_cast<Pointer_Vector<Point>*>(0))
        cerr << "direction_vector == 0" << endl;
     else
diff -rc2P 3DLDF-2.0.2/src/hyprbola.web 3DLDF-2.0.3/src/hyprbola.web
*** 3DLDF-2.0.2/src/hyprbola.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/hyprbola.web	Thu Dec 12 19:54:47 2013
***************
*** 234,251 ****
     using namespace Scan_Parse;
  
! @q **** (4) |options == 0|.  Use defaults.@>
! @ |options == 0|.  Use defaults.
  \initials{LDF 2005.11.15.}
  
  @<Define |Hyperbola| functions@>=
  
!    if (!options)
!       {
! 
!       }  /* |if (!options)|  */
  
  
! @q **** (4) |options != 0|.@>
! @ |options != 0|.
  \initials{LDF 2005.11.15.}
  
--- 234,251 ----
     using namespace Scan_Parse;
  
! @q **** (4) |options == static_cast<Hyperbola_Set_Option_Struct*>(0)|.  Use defaults.@>
! @ |options == static_cast<Hyperbola_Set_Option_Struct*>(0)|.  Use defaults.
  \initials{LDF 2005.11.15.}
  
  @<Define |Hyperbola| functions@>=
  
!    if (options == static_cast<Hyperbola_Set_Option_Struct*>(0))
!    {
!       /* Do nothing  */
  
+    }  /* |if (options == static_cast<Hyperbola_Set_Option_Struct*>(0))|  */
  
! @q **** (4) |options != static_cast<Hyperbola_Set_Option_Struct*>(0)|.  @>
! @ |options != static_cast<Hyperbola_Set_Option_Struct*>(0)|.
  \initials{LDF 2005.11.15.}
  
***************
*** 264,268 ****
  @<Define |Hyperbola| functions@>=
  
!    else /* |options != 0|  */
        {
  
--- 264,268 ----
  @<Define |Hyperbola| functions@>=
  
!    else /* |options != static_cast<Hyperbola_Set_Option_Struct*>(0)|  */
        {
  
***************
*** 357,361 ****
            connectors.push_back("..");
  
!       }     /* |else| (|options != 0|)  */
  
  
--- 357,361 ----
            connectors.push_back("..");
  
!       }     /* |else| (|options != static_cast<Hyperbola_Set_Option_Struct*>(0)|)  */
  
  
***************
*** 590,594 ****
  @<Define |Hyperbola| functions@>=
  
!     if (u == 0)
         {
             cerr_strm << thread_name << "ERROR!  In `Hyperbola::get_discriminant()':"
--- 590,594 ----
  @<Define |Hyperbola| functions@>=
  
!     if (u == static_cast<Transform*>(0))
         {
             cerr_strm << thread_name << "ERROR!  In `Hyperbola::get_discriminant()':"
***************
*** 611,615 ****
                     
  
!        }  /* |if (u == 0)|  */
  
  @q **** (4)@> 
--- 611,615 ----
                     
  
!        }  /* |if (u == static_cast<Transform*>(0))|  */
  
  @q **** (4)@> 
***************
*** 796,800 ****
  @<Define |Hyperbola| functions@>=
  
!     if (t == 0)
         {
             cerr_strm << thread_name 
--- 796,800 ----
  @<Define |Hyperbola| functions@>=
  
!     if (t == static_cast<Transform*>(0))
         {
             cerr_strm << thread_name 
***************
*** 812,816 ****
             return -5;
                             
!        }  /* |if (t == 0)|  */
  
  @q **** (4)@> 
--- 812,816 ----
             return -5;
                             
!        }  /* |if (t == static_cast<Transform*>(0))|  */
  
  @q **** (4)@> 
***************
*** 993,997 ****
          cerr << "ERROR! In Hyperbola::get_point():\n"
               << "Argument is >= size of Hyperbola.\n"
!              << "Returning INVALID_POINT.\n\n"  << flush;
          return INVALID_POINT;
        }
--- 993,997 ----
          cerr << "ERROR! In Hyperbola::get_point():\n"
               << "Argument is >= size of Hyperbola.\n"
!              << "Returning INVALID_POINT.\n\n" ;
          return INVALID_POINT;
        }
***************
*** 1046,1050 ****
          cerr << "ERROR! In Hyperbola::get_point():\n"
               << "Argument is >= size of Hyperbola.\n"
!              << "Returning INVALID_POINT.\n\n"  << flush;
          return INVALID_POINT;
        }
--- 1046,1050 ----
          cerr << "ERROR! In Hyperbola::get_point():\n"
               << "Argument is >= size of Hyperbola.\n"
!              << "Returning INVALID_POINT.\n\n" ;
          return INVALID_POINT;
        }
***************
*** 1983,1987 ****
  @q ***** (5)@> 
  
!            if (discriminant == 0)
                {
                    x = (-a_2 * m * n) / ((a_2 * m_2) - b_2);
--- 1983,1987 ----
  @q ***** (5)@> 
  
!            if (discriminant == ZERO_REAL)
                {
                    x = (-a_2 * m * n) / ((a_2 * m_2) - b_2);
***************
*** 2002,2010 ****
                    return bpv;
  
!               }   /* |if (discriminant == 0)|  */
  
  @q ***** (5)@> 
  
!            if (discriminant > 0)
                {
  
--- 2002,2010 ----
                    return bpv;
  
!               }   /* |if (discriminant == ZERO_REAL)|  */
  
  @q ***** (5)@> 
  
!            if (discriminant > ZERO_REAL)
                {
  
***************
*** 2051,2055 ****
  
  
!               }  /* |if (discriminant > 0)|  */
  
  @q ***** (5)@> 
--- 2051,2055 ----
  
  
!               }  /* |if (discriminant > ZERO_REAL)|  */
  
  @q ***** (5)@> 
diff -rc2P 3DLDF-2.0.2/src/imetfncs.web 3DLDF-2.0.3/src/imetfncs.web
*** 3DLDF-2.0.2/src/imetfncs.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/imetfncs.web	Thu Dec 12 20:17:11 2013
***************
*** 232,243 ****
  
  
! @q ******* (7) Error handling:  |curr_entry == 0|.@> 
  
! @ Error handling:  |curr_entry == 0|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Type| functions@>=
    
!   if (curr_entry == 0)
      {
  
--- 232,243 ----
  
  
! @q ******* (7) Error handling:  |curr_entry == static_cast<Id_Map_Entry_Node>(0)|.@> 
  
! @ Error handling:  |curr_entry == static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Type| functions@>=
    
!   if (curr_entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 254,258 ****
                throw bad_assignment;
  
!     } /* |if (curr_entry == 0)|  */
  
  
--- 254,258 ----
                throw bad_assignment;
  
!     } /* |if (curr_entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
  
***************
*** 266,270 ****
  @<Define |Id_Map_Type| functions@>=
   
!      else if (curr_entry->subordinate_array != 0)
          ;  /* Do nothing.  */@; 
  
--- 266,270 ----
  @<Define |Id_Map_Type| functions@>=
   
!      else if (curr_entry->subordinate_array != static_cast<Id_Map_Entry_Node>(0))
          ;  /* Do nothing.  */@; 
  
***************
*** 334,338 ****
  @<Define |Id_Map_Type| functions@>=
  
!   if (curr_entry->superordinate_vector != 0)
      {
  
--- 334,338 ----
  @<Define |Id_Map_Type| functions@>=
  
!   if (curr_entry->superordinate_vector != static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 377,381 ****
  @q ********* (9).@> 
  
!     } /* |else if (curr_entry->superordinate_vector != 0)|  */
  
  
--- 377,381 ----
  @q ********* (9).@> 
  
!     } /* |else if (curr_entry->superordinate_vector != static_cast<Id_Map_Entry_Node>(0))|  */
  
  
***************
*** 600,609 ****
        {
          Shape* s = static_cast<Shape*>(object);
!         if (s != 0)
            {
              s->clear();
  
              delete s;
!             s = 0;
            }
          
--- 600,609 ----
        {
          Shape* s = static_cast<Shape*>(object);
!         if (s != static_cast<Shape*>(0))
            {
              s->clear();
  
              delete s;
!             s = static_cast<Shape*>(0);
            }
          
***************
*** 636,643 ****
         {
          Nurb* n = static_cast<Nurb*>(object);
!         if (n != 0)
            {
              delete n;
!             n = 0;
            }
  
--- 636,643 ----
         {
          Nurb* n = static_cast<Nurb*>(object);
!         if (n != static_cast<Nurb*>(0))
            {
              delete n;
!             n = static_cast<Nurb*>(0);
            }
  
***************
*** 695,699 ****
     else if (type == UNDECLARED)
       {
!        if (object != 0)
           {
  
--- 695,699 ----
     else if (type == UNDECLARED)
       {
!        if (object != static_cast<Shape*>(0))
           {
  
***************
*** 711,717 ****
             return;
  
!          } /* |if (object != 0)|  */
  
!        else if (left != 0 || right != 0)
           {
  
--- 711,718 ----
             return;
  
!          } /* |if (object != static_cast<Shape*>(0))|  */
  
!        else if (   left != static_cast<Id_Map_Entry_Node>(0) 
!                 || right != static_cast<Id_Map_Entry_Node>(0))
           {
  
***************
*** 729,733 ****
             return;
  
!          } /* |else if (left != 0 || right != 0)|  */
  
         else
--- 730,735 ----
             return;
  
!          } /* |else if (   left != static_cast<Id_Map_Entry_Node>(0) 
!                         || right != static_cast<Id_Map_Entry_Node>(0))|  */
  
         else
***************
*** 825,829 ****
  @<Define |Id_Map_Entry_Type| functions@>=
  
!        if (object != 0)
           {
  
--- 827,831 ----
  @<Define |Id_Map_Entry_Type| functions@>=
  
!        if (object != static_cast<Id_Map_Entry_Node>(0))
           {
  
***************
*** 1330,1334 ****
             object = 0;
  
!          } /* |if (object != 0)|  */
   
  
--- 1332,1336 ----
             object = 0;
  
!          } /* |if (object != static_cast<Id_Map_Entry_Node>(0))|  */
   
  
***************
*** 1356,1360 ****
  #if DEBUG_COMPILE
  
!    else if (DEBUG) /* |object == 0|  */
       {
  
--- 1358,1362 ----
  #if DEBUG_COMPILE
  
!    else if (DEBUG) /* |object == static_cast<Id_Map_Entry_Node>(0)|  */
       {
  
***************
*** 1367,1371 ****
         cerr_strm.str("");
  
!      }     /* |else if (DEBUG)| (|object == 0|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1369,1373 ----
         cerr_strm.str("");
  
!      }     /* |else if (DEBUG)| (|object == static_cast<Id_Map_Entry_Node>(0)|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1437,1444 ****
         Predicate* c = static_cast<Predicate*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
  
--- 1439,1446 ----
         Predicate* c = static_cast<Predicate*>(object);
         
!        if (c != static_cast<Predicate*>(0))
           {
             delete c;
!            c = static_cast<Predicate*>(0);
           }
  
***************
*** 1452,1459 ****
         int* c = static_cast<int*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       } /* |else if (type == BOOLEAN)|  */
--- 1454,1461 ----
         int* c = static_cast<int*>(object);
         
!        if (c != static_cast<int*>(0))
           {
             delete c;
!            c = static_cast<int*>(0);
           }
       } /* |else if (type == BOOLEAN)|  */
***************
*** 1464,1471 ****
         {
          Complex* c = static_cast<Complex*>(object);
!         if (c != 0)
            {
              delete c;
!             c = 0;
            }
  
--- 1466,1473 ----
         {
          Complex* c = static_cast<Complex*>(object);
!         if (c != static_cast<Complex*>(0))
            {
              delete c;
!             c = static_cast<Complex*>(0);
            }
  
***************
*** 1476,1483 ****
         {
          Matrix* m = static_cast<Matrix*>(object);
!         if (m != 0)
            {
              delete m;
!             m = 0;
            }
  
--- 1478,1485 ----
         {
          Matrix* m = static_cast<Matrix*>(object);
!         if (m != static_cast<Matrix*>(0))
            {
              delete m;
!             m = static_cast<Matrix*>(0);
            }
  
***************
*** 1493,1500 ****
         Bool_Point* bp = static_cast<Bool_Point*>(object);
         
!        if (bp != 0)
           {
             delete bp;
!            bp = 0;
           }
       } /* |else if (type == BOOL_POINT)|  */
--- 1495,1502 ----
         Bool_Point* bp = static_cast<Bool_Point*>(object);
         
!        if (bp != static_cast<Bool_Point*>(0))
           {
             delete bp;
!            bp = static_cast<Bool_Point*>(0);
           }
       } /* |else if (type == BOOL_POINT)|  */
***************
*** 1508,1515 ****
         string* c = static_cast<string*>(object);
     
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1510,1517 ----
         string* c = static_cast<string*>(object);
     
!        if (c != static_cast<string*>(0))
           {
             delete c;
!            c = static_cast<string*>(0);
           }
       }
***************
*** 1521,1528 ****
         real* c = static_cast<real*>(object);
     
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1523,1530 ----
         real* c = static_cast<real*>(object);
     
!        if (c != static_cast<real*>(0))
           {
             delete c;
!            c = static_cast<real*>(0);
           }
       }
***************
*** 1533,1540 ****
         unsigned long long* c = static_cast<unsigned long long*>(object);
     
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1535,1542 ----
         unsigned long long* c = static_cast<unsigned long long*>(object);
     
!        if (c != static_cast<unsigned long long*>(0))
           {
             delete c;
!            c = static_cast<unsigned long long*>(0);
           }
       }
***************
*** 1545,1552 ****
         Pen* c = static_cast<Pen*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1547,1554 ----
         Pen* c = static_cast<Pen*>(object);
         
!        if (c != static_cast<Pen*>(0))
           {
             delete c;
!            c = static_cast<Pen*>(0);
           }
       }
***************
*** 1557,1564 ****
         Dash_Pattern* c = static_cast<Dash_Pattern*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1559,1566 ----
         Dash_Pattern* c = static_cast<Dash_Pattern*>(object);
         
!        if (c != static_cast<Dash_Pattern*>(0))
           {
             delete c;
!            c = static_cast<Dash_Pattern*>(0);
           }
       }
***************
*** 1569,1576 ****
         Color* c = static_cast<Color*>(object);
  
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
  
--- 1571,1578 ----
         Color* c = static_cast<Color*>(object);
  
!        if (c != static_cast<Color*>(0))
           {
             delete c;
!            c = static_cast<Color*>(0);
           }
  
***************
*** 1583,1590 ****
         Picture* c = static_cast<Picture*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }  
       }
--- 1585,1592 ----
         Picture* c = static_cast<Picture*>(object);
         
!        if (c != static_cast<Picture*>(0))
           {
             delete c;
!            c = static_cast<Picture*>(0);
           }  
       }
***************
*** 1595,1602 ****
         Transform* c = static_cast<Transform*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1597,1604 ----
         Transform* c = static_cast<Transform*>(object);
         
!        if (c != static_cast<Transform*>(0))
           {
             delete c;
!            c = static_cast<Transform*>(0);
           }
       }
***************
*** 1607,1614 ****
         Plane* c = static_cast<Plane*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1609,1616 ----
         Plane* c = static_cast<Plane*>(object);
         
!        if (c != static_cast<Plane*>(0))
           {
             delete c;
!            c = static_cast<Plane*>(0);
           }
       }
***************
*** 1621,1628 ****
         Focus* c = static_cast<Focus*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1623,1630 ----
         Focus* c = static_cast<Focus*>(object);
         
!        if (c != static_cast<Focus*>(0))
           {
             delete c;
!            c = static_cast<Focus*>(0);
           }
       }
***************
*** 1634,1641 ****
         Definition_Info_Node c = static_cast<Definition_Info_Node>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1636,1643 ----
         Definition_Info_Node c = static_cast<Definition_Info_Node>(object);
         
!        if (c != static_cast<Definition_Info_Node>(0))
           {
             delete c;
!            c = static_cast<Definition_Info_Node>(0);
           }
       }
***************
*** 1646,1653 ****
         Origami_Figure* c = static_cast<Origami_Figure*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1648,1655 ----
         Origami_Figure* c = static_cast<Origami_Figure*>(object);
         
!        if (c != static_cast<Origami_Figure*>(0))
           {
             delete c;
!            c = static_cast<Origami_Figure*>(0);
           }
       }
***************
*** 1658,1665 ****
         Glyph* c = static_cast<Glyph*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1660,1667 ----
         Glyph* c = static_cast<Glyph*>(object);
         
!        if (c != static_cast<Glyph*>(0))
           {
             delete c;
!            c = static_cast<Glyph*>(0);
           }
       }
***************
*** 1678,1685 ****
         real* c = static_cast<real*>(object);
     
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1680,1687 ----
         real* c = static_cast<real*>(object);
     
!        if (c != static_cast<real*>(0))
           {
             delete c;
!            c = static_cast<real*>(0);
           }
       }
***************
*** 1699,1706 ****
         real* c = static_cast<real*>(object);
     
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }  
--- 1701,1708 ----
         real* c = static_cast<real*>(object);
     
!        if (c != static_cast<real*>(0))
           {
             delete c;
!            c = static_cast<real*>(0);
           }
       }  
***************
*** 1721,1728 ****
         string*  c = static_cast<string*>(object);
         
!        if (c != 0)
           {
             delete c;
!            c = 0;
           }
       }
--- 1723,1730 ----
         string*  c = static_cast<string*>(object);
         
!        if (c != static_cast<string*>(0))
           {
             delete c;
!            c = static_cast<string*>(0);
           }
       }
***************
*** 1749,1753 ****
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    else if (object != 0)
       {
         cerr_strm << thread_name 
--- 1751,1755 ----
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    else if (object != static_cast<void*>(0))
       {
         cerr_strm << thread_name 
***************
*** 1988,1992 ****
  
  
! 	    if (curr_entry->up == 0)
  	      {
  
--- 1990,1994 ----
  
  
! 	    if (curr_entry->up == static_cast<Id_Map_Entry_Node>(0))
  	      {
  
***************
*** 2008,2012 ****
  		    return 0;
  		  
! 	      } /* |if (curr_entry->up == 0)|  */
  
  	    temp_entry = curr_entry;
--- 2010,2014 ----
  		    return 0;
  		  
! 	      } /* |if (curr_entry->up == static_cast<Id_Map_Entry_Node>(0))|  */
  
  	    temp_entry = curr_entry;
***************
*** 2160,2164 ****
        cerr << "ERROR! In `Id_Map_Entry_Type::set_entry()':"
             << endl << "`pthread_mutex_init()' failed.";
!       cerr << "Type <RETURN> to continue.\n" << flush; 
        getchar();  /* Don't delete this!  */ 
  
--- 2162,2166 ----
        cerr << "ERROR! In `Id_Map_Entry_Type::set_entry()':"
             << endl << "`pthread_mutex_init()' failed.";
!       cerr << "Type <RETURN> to continue.\n"; 
        getchar();  /* Don't delete this!  */ 
  
***************
*** 2171,2175 ****
               cerr << "In `Id_Map_Entry_Type::set_entry()':"
                    << endl << "`pthread_mutex_init()' succeeded!"
!                   << endl << flush;
            }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 2173,2177 ----
               cerr << "In `Id_Map_Entry_Type::set_entry()':"
                    << endl << "`pthread_mutex_init()' succeeded!"
!                   << endl;
            }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 2188,2192 ****
  
        cerr << "In set_entry():  type == " << type << " == " 
!            << name_map[type] << endl << flush;
  
        if (category == SPARK)
--- 2190,2194 ----
  
        cerr << "In set_entry():  type == " << type << " == " 
!            << name_map[type] << endl;
  
        if (category == SPARK)
***************
*** 2214,2238 ****
  
  
!       if (object == 0)
          cerr << "object == 0" << "\n";
        else 
          cerr << "object != 0" << "\n";
  
!       if (up == 0)
          cerr << "up == 0" << "\n";
        else 
          cerr << "up != 0" << "\n";
  
!       if (left == 0)
          cerr << "left == 0" << "\n";
        else 
          cerr << "left != 0" << "\n";
  
!       if (right == 0)
          cerr << "right == 0" << "\n";
        else 
          cerr << "right != 0" << "\n";
  
!       cerr << "Exiting Id_Map_Entry_Type::set()." << "\n" << flush;
      }
  
--- 2216,2240 ----
  
  
!       if (object == static_cast<void*>(0))
          cerr << "object == 0" << "\n";
        else 
          cerr << "object != 0" << "\n";
  
!       if (up == static_cast<Id_Map_Entry_Node>(0))
          cerr << "up == 0" << "\n";
        else 
          cerr << "up != 0" << "\n";
  
!       if (left == static_cast<Id_Map_Entry_Node>(0))
          cerr << "left == 0" << "\n";
        else 
          cerr << "left != 0" << "\n";
  
!       if (right == static_cast<Id_Map_Entry_Node>(0))
          cerr << "right == 0" << "\n";
        else 
          cerr << "right != 0" << "\n";
  
!       cerr << "Exiting Id_Map_Entry_Type::set()." << "\n";
      }
  
***************
*** 2276,2301 ****
     Scanner_Node scanner_node;
  
!    if (id_map_node != 0 && id_map_node->scanner_node != 0)
       {
         scanner_node = id_map_node->scanner_node;
  
!      } /* |if (id_map_node->scanner_node != 0)|  */
  
  
!    else if (i.id_map_node->scanner_node != 0)
       {
         scanner_node = i.id_map_node->scanner_node;
  
!      } /* |if (i.id_map_node->scanner_node != 0)|  */
  
  
  
!    else /* |   id_map_node->scanner_node == 0
!  	   && i.id_map_node->scanner_node == 0|  */
       {
         
!        scanner_node = 0;
       
!      }    /* |else| (|i.id_map_node->scanner_node == 0|)  */
  
  
--- 2278,2304 ----
     Scanner_Node scanner_node;
  
!    if (   id_map_node != static_cast<Id_Map_Node>(0) 
!        && id_map_node->scanner_node != static_cast<Scanner_Node>(0))
       {
         scanner_node = id_map_node->scanner_node;
  
!      } /* |if (id_map_node->scanner_node != static_cast<Scanner_Node>(0))|  */
  
  
!    else if (i.id_map_node->scanner_node != static_cast<Scanner_Node>(0))
       {
         scanner_node = i.id_map_node->scanner_node;
  
!      } /* |if (i.id_map_node->scanner_node != static_cast<Scanner_Node>(0))|  */
  
  
  
!    else /* |   id_map_node->scanner_node  == static_cast<Scanner_Node>(0)
!  	   && i.id_map_node->scanner_node == static_cast<Scanner_Node>(0)|  */
       {
         
!        scanner_node = static_cast<Scanner_Node>(0);
       
!      }    /* |else| (|i.id_map_node->scanner_node == static_cast<Scanner_Node>(0)|)  */
  
  
***************
*** 2382,2386 ****
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (type == SYNONYM && i.object != 0)
      {
        string* o = new string;
--- 2385,2389 ----
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (type == SYNONYM && i.object != static_cast<void*>(0))
      {
        string* o = new string;
***************
*** 2391,2395 ****
  
              
!   else if (type == PREDICATE && i.object != 0)
      {
        Predicate* o = new Predicate;
--- 2394,2398 ----
  
              
!   else if (type == PREDICATE && i.object != static_cast<void*>(0))
      {
        Predicate* o = new Predicate;
***************
*** 2399,2403 ****
      }
  
!   else if (type == BOOLEAN && i.object != 0)
      {
        int* o = new int;
--- 2402,2406 ----
      }
  
!   else if (type == BOOLEAN && i.object != static_cast<void*>(0))
      {
        int* o = new int;
***************
*** 2407,2411 ****
      }
  
!   else if (type == NUMERIC && i.object != 0)
      {
        real* o = new real;
--- 2410,2414 ----
      }
  
!   else if (type == NUMERIC && i.object != static_cast<void*>(0))
      {
        real* o = new real;
***************
*** 2414,2418 ****
      }
  
!   else if (type == ULONG_LONG && i.object != 0)
      {
        ulong_long* o = new ulong_long;
--- 2417,2421 ----
      }
  
!   else if (type == ULONG_LONG && i.object != static_cast<void*>(0))
      {
        ulong_long* o = new ulong_long;
***************
*** 2422,2426 ****
  
  
!   else if (type == STRING && i.object != 0)
      {
        string* o = new string;
--- 2425,2429 ----
  
  
!   else if (type == STRING && i.object != static_cast<void*>(0))
      {
        string* o = new string;
***************
*** 2429,2433 ****
      }
  
!   else if (type == PEN && i.object != 0)
      {
        Pen* o = new Pen;
--- 2432,2436 ----
      }
  
!   else if (type == PEN && i.object != static_cast<void*>(0))
      {
        Pen* o = new Pen;
***************
*** 2436,2440 ****
      }
  
!   else if (type == DASH_PATTERN && i.object != 0)
      {
        Dash_Pattern* o = new Dash_Pattern;
--- 2439,2443 ----
      }
  
!   else if (type == DASH_PATTERN && i.object != static_cast<void*>(0))
      {
        Dash_Pattern* o = new Dash_Pattern;
***************
*** 2443,2447 ****
      }
  
!   else if (type == COLOR && i.object != 0)
      {
        Color* o = new Color;
--- 2446,2450 ----
      }
  
!   else if (type == COLOR && i.object != static_cast<void*>(0))
      {
        Color* o = new Color;
***************
*** 2450,2454 ****
      }
  
!   else if (type == PICTURE && i.object != 0)
      {
        Picture* o = new Picture;
--- 2453,2457 ----
      }
  
!   else if (type == PICTURE && i.object != static_cast<void*>(0))
      {
        Picture* o = new Picture;
***************
*** 2459,2463 ****
  
  
!   else if (type == TRANSFORM && i.object != 0)
      {
        Transform* o = new Transform;
--- 2462,2466 ----
  
  
!   else if (type == TRANSFORM && i.object != static_cast<void*>(0))
      {
        Transform* o = new Transform;
***************
*** 2467,2471 ****
  
  
!   else if (type == FOCUS && i.object != 0)
      {
        Focus* o = new Focus;
--- 2470,2474 ----
  
  
!   else if (type == FOCUS && i.object != static_cast<void*>(0))
      {
        Focus* o = new Focus;
***************
*** 2475,2479 ****
  
  
!   else if (type == MACRO && i.object != 0)
      {
        Definition_Info_Node o = new Definition_Info_Type;
--- 2478,2482 ----
  
  
!   else if (type == MACRO && i.object != static_cast<void*>(0))
      {
        Definition_Info_Node o = new Definition_Info_Type;
***************
*** 2499,2503 ****
  
  
!   else if (type == BOOL_POINT && i.object != 0)
      {
        int* o = new int;
--- 2502,2506 ----
  
  
!   else if (type == BOOL_POINT && i.object != static_cast<void*>(0))
      {
        int* o = new int;
***************
*** 2507,2511 ****
      }
  
!   else if (type == POINT && i.object != 0)
      {
        Point* o = new Point;
--- 2510,2514 ----
      }
  
!   else if (type == POINT && i.object != static_cast<void*>(0))
      {
        Point* o = new Point;
***************
*** 2514,2518 ****
      }
  
!   else if (type == PATH && i.object != 0)
      {
        Path* o = new Path;
--- 2517,2521 ----
      }
  
!   else if (type == PATH && i.object != static_cast<void*>(0))
      {
        Path* o = new Path;
***************
*** 2521,2525 ****
      }
  
!   else if (type == TRIANGLE && i.object != 0)
      {
        Triangle* o = new Triangle;
--- 2524,2528 ----
      }
  
!   else if (type == TRIANGLE && i.object != static_cast<void*>(0))
      {
        Triangle* o = new Triangle;
***************
*** 2529,2533 ****
  
  
!   else if (type == POLYGON && i.object != 0)
      {
        Polygon* o = new Polygon;
--- 2532,2536 ----
  
  
!   else if (type == POLYGON && i.object != static_cast<void*>(0))
      {
        Polygon* o = new Polygon;
***************
*** 2536,2540 ****
      }
  
!   else if (type == REG_POLYGON && i.object != 0)
      {
        Reg_Polygon* o = new Reg_Polygon;
--- 2539,2543 ----
      }
  
!   else if (type == REG_POLYGON && i.object != static_cast<void*>(0))
      {
        Reg_Polygon* o = new Reg_Polygon;
***************
*** 2543,2547 ****
      }
  
!   else if (type == RECTANGLE && i.object != 0)
      {
        Rectangle* o = new Rectangle;
--- 2546,2550 ----
      }
  
!   else if (type == RECTANGLE && i.object != static_cast<void*>(0))
      {
        Rectangle* o = new Rectangle;
***************
*** 2552,2556 ****
  #if 0 /* |Square| not defined yet.  \initials{LDF 2004.09.14.}  */@;
  
!   else if (type == SQUARE && i.object != 0)
      {
        Square* o = new Square;
--- 2555,2559 ----
  #if 0 /* |Square| not defined yet.  \initials{LDF 2004.09.14.}  */@;
  
!   else if (type == SQUARE && i.object != static_cast<void*>(0))
      {
        Square* o = new Square;
***************
*** 2560,2564 ****
  #endif 
  
!   else if (type == ELLIPSE && i.object != 0)
      {
        Ellipse* o = new Ellipse;
--- 2563,2567 ----
  #endif 
  
!   else if (type == ELLIPSE && i.object != static_cast<void*>(0))
      {
        Ellipse* o = new Ellipse;
***************
*** 2567,2571 ****
      }
  
!   else if (type == CIRCLE && i.object != 0)
      {
        Circle* o = new Circle;
--- 2570,2574 ----
      }
  
!   else if (type == CIRCLE && i.object != static_cast<void*>(0))
      {
        Circle* o = new Circle;
***************
*** 2575,2579 ****
  
  
!   else if (type == CUBOID && i.object != 0)
      {
        Cuboid* o = new Cuboid;
--- 2578,2582 ----
  
  
!   else if (type == CUBOID && i.object != static_cast<void*>(0))
      {
        Cuboid* o = new Cuboid;
***************
*** 2582,2586 ****
      }
  
!   else if (type == POLYHEDRON && i.object != 0)
      {
        Polyhedron* o = new Polyhedron;
--- 2585,2589 ----
      }
  
!   else if (type == POLYHEDRON && i.object != static_cast<void*>(0))
      {
        Polyhedron* o = new Polyhedron;
***************
*** 2828,2838 ****
      {
  
! @q ****** (6) Error handling:  |object != 0|.@>
! @ Error handling:  |object != 0|.
  \initials{LDF 2004.09.14.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (i.object != 0)
      {
        cerr_strm << thread_name 
--- 2831,2841 ----
      {
  
! @q ****** (6) Error handling:  |object != static_cast<void*>(0)|.@>
! @ Error handling:  |object != static_cast<void*>(0)|.
  \initials{LDF 2004.09.14.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (i.object != static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 2845,2852 ****
        cerr_strm.str("");
  
!     } /* |if (i.object != 0)|  */
  
! @q ****** (6) |object == 0|.@>
! @ |object == 0|.
  \initials{LDF 2004.09.14.}
  
--- 2848,2855 ----
        cerr_strm.str("");
  
!     } /* |if (i.object != static_cast<void*>(0))|  */
  
! @q ****** (6) |object == static_cast<void*>(0)|.@>
! @ |object == static_cast<void*>(0)|.
  \initials{LDF 2004.09.14.}
  
***************
*** 2854,2858 ****
  
  #if DEBUG_COMPILE
!    else if (DEBUG) /* |i.object == 0| */
       {
  
--- 2857,2861 ----
  
  #if DEBUG_COMPILE
!    else if (DEBUG) /* |i.object == static_cast<void*>(0)| */
       {
  
***************
*** 2865,2869 ****
         cerr_strm.str("");
  
!      }  /* |else if (DEBUG)| (|i.object == 0|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
--- 2868,2872 ----
         cerr_strm.str("");
  
!      }  /* |else if (DEBUG)| (|i.object == static_cast<void*>(0)|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 2898,2903 ****
   
  
! @q ****** (6) |i.left != 0|.@>
! @ |i.left != 0|.
  \initials{LDF 2004.09.14.}
  
--- 2901,2906 ----
   
  
! @q ****** (6) |i.left != static_cast<Id_Map_Entry_Node>(0)|.@>
! @ |i.left != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.09.14.}
  
***************
*** 2905,2909 ****
  
  
!       if (i.left != 0)
          {
  
--- 2908,2912 ----
  
  
!       if (i.left != static_cast<Id_Map_Entry_Node>(0))
          {
  
***************
*** 2932,2940 ****
            left->up = this;
  
!         } /* |if (i.left != 0)|  */
  
  
! @q ****** (6) |i.right != 0|.@>
! @ |i.right != 0|.
  \initials{LDF 2004.09.14.}
  
--- 2935,2943 ----
            left->up = this;
  
!         } /* |if (i.left != static_cast<Id_Map_Entry_Node>(0))|  */
  
  
! @q ****** (6) |i.right != static_cast<Id_Map_Entry_Node>(0)|.@>
! @ |i.right != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.09.14.}
  
***************
*** 2942,2946 ****
  
  
!       if (i.right != 0)
          {
  
--- 2945,2949 ----
  
  
!       if (i.right != static_cast<Id_Map_Entry_Node>(0))
          {
  
***************
*** 2967,2971 ****
            right->up = this;
  
!         } /* |if (i.right != 0)|  */
  
  
--- 2970,2974 ----
            right->up = this;
  
!         } /* |if (i.right != static_cast<Id_Map_Entry_Node>(0))|  */
  
  
***************
*** 3042,3046 ****
    Scanner_Node scanner_node = 0;
  
!   if (id_map_node != 0 && id_map_node->scanner_node != 0)
      scanner_node = id_map_node->scanner_node;
    
--- 3045,3050 ----
    Scanner_Node scanner_node = 0;
  
!   if (   id_map_node != static_cast<Id_Map_Node>(0) 
!       && id_map_node->scanner_node != static_cast<Scanner_Node>(0))
      scanner_node = id_map_node->scanner_node;
    
***************
*** 3049,3053 ****
    bool error_stop_value;
  
!   if (scanner_node != 0)
      error_stop_value = (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
        ? true : false;
--- 3053,3057 ----
    bool error_stop_value;
  
!   if (scanner_node != static_cast<Scanner_Node>(0))
      error_stop_value = (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
        ? true : false;
***************
*** 3070,3077 ****
     Do this in the assignment operators, too.  */ 
  
!       if (scanner_node != 0 &&
!           (   scanner_node->get_run_state()->multithread_input 
!            || scanner_node->get_run_state()->multithread_output
!            || scanner_node->get_run_state()->multithread_include))
  
          /* Using multithreading.  */
--- 3074,3082 ----
     Do this in the assignment operators, too.  */ 
  
!       if (    scanner_node != static_cast<Scanner_Node>(0) 
!            &&
!               (   scanner_node->get_run_state()->multithread_input 
!                || scanner_node->get_run_state()->multithread_output
!                || scanner_node->get_run_state()->multithread_include))
  
          /* Using multithreading.  */
***************
*** 3084,3100 ****
  
  
! @q ***** (5) |scanner_node == 0| or not using multithreading.@>   
  
! @ |scanner_node == 0| or not using multithreading.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else /* |scanner_node == 0| or not using multithreading.  */
          {
!           thread_info = 0;
            thread_name = "";
  
!         } /* |else| (|scanner_node == 0| or not using multithreading.)  */
  
  
--- 3089,3106 ----
  
  
! @q ***** (5) |scanner_node == static_cast<Scanner_Node>(0)| or not using multithreading.@> 
  
! @ |scanner_node == static_cast<Id_Map_Entry_Node>(0)| or not using multithreading.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else 
          {
!           thread_info = static_cast<Thread_Info_Type*>(0);
            thread_name = "";
  
!         } /* |else| (|scanner_node == static_cast<Scanner_Node>(0)| 
!                      or not using multithreading.)  */
  
  
***************
*** 3221,3229 ****
      {
  
!         if (s->subordinate_array == 0)
            s->subordinate_array = this;
  
  
!         if (type == COLOR && object != 0)
            {
  
--- 3227,3235 ----
      {
  
!         if (s->subordinate_array == static_cast<Id_Map_Entry_Node>(0))
            s->subordinate_array = this;
  
  
!         if (type == COLOR && object != static_cast<void*>(0))
            {
  
***************
*** 3231,3235 ****
  
  
!               if (s->object == 0)
                  s->object = static_cast<void*>(new Pv); 
  
--- 3237,3241 ----
  
  
!               if (s->object == static_cast<void*>(0))
                  s->object = static_cast<void*>(new Pv); 
  
***************
*** 3243,3252 ****
  
  
!         else if (type == POINT && object != 0)
            {
  
                typedef Pointer_Vector<Point> Pv;
  
!               if (s->object == 0)
                  s->object = static_cast<void*>(new Pv); 
  
--- 3249,3258 ----
  
  
!         else if (type == POINT && object != static_cast<void*>(0))
            {
  
                typedef Pointer_Vector<Point> Pv;
  
!               if (s->object == static_cast<void*>(0))
                  s->object = static_cast<void*>(new Pv); 
  
***************
*** 3260,3269 ****
  
  
!         else if (type == BOOL_POINT && object != 0)
            {
  
                typedef Pointer_Vector<Bool_Point> Pv;
  
!               if (s->object == 0)
                  s->object = static_cast<void*>(new Pv); 
  
--- 3266,3275 ----
  
  
!         else if (type == BOOL_POINT && object != static_cast<void*>(0))
            {
  
                typedef Pointer_Vector<Bool_Point> Pv;
  
!               if (s->object == static_cast<void*>(0))
                  s->object = static_cast<void*>(new Pv); 
  
***************
*** 3277,3281 ****
  
  
!         else if (object != 0)  /* Invalid |type|.  */
            {
  
--- 3283,3287 ----
  
  
!         else if (object != static_cast<void*>(0))  /* Invalid |type|.  */
            {
  
***************
*** 3292,3296 ****
                return 1;
  
!           }  /* |else if (object != 0)| (Invalid |type|.)  */
  
  
--- 3298,3302 ----
                return 1;
  
!           }  /* |else if (object != static_cast<void*>(0))| (Invalid |type|.)  */
  
  
***************
*** 3439,3450 ****
  
  
! @q **** (4) If |left != 0|, call this function recursively on |left|.@>   
  
! @ If |left != 0|, call this function recursively on |left|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    if (left != 0)
        {
           status = left->set_id_map_node(i);
--- 3445,3458 ----
  
  
! @q **** (4) If |left != static_cast<Id_Map_Entry_Node>(0)|, @>   
! @q **** (4) call this function recursively on |left|.       @>
  
! @ If |left != static_cast<Id_Map_Entry_Node>(0)|, 
! call this function recursively on |left|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    if (left != static_cast<Id_Map_Entry_Node>(0))
        {
           status = left->set_id_map_node(i);
***************
*** 3473,3477 ****
              } /* |if (status != 0)|  */
  
!       } /* |if (left != 0)|  */
   
  
--- 3481,3485 ----
              } /* |if (status != 0)|  */
  
!       } /* |if (left != static_cast<Id_Map_Entry_Node>(0))|  */
   
  
***************
*** 3485,3496 ****
     id_map_node = i;
  
! @q **** (4) If |right != 0|, call this function recursively on |right|.@>   
  
! @ If |right != 0|, call this function recursively on |right|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    if (right != 0)
        {
           status = right->set_id_map_node(i);
--- 3493,3506 ----
     id_map_node = i;
  
! @q **** (4) If |right != static_cast<Id_Map_Entry_Node>(0)|, @>   
! @q **** (4) call this function recursively on |right|.       @>
  
! @ If |right != static_cast<Id_Map_Entry_Node>(0)|, 
! call this function recursively on |right|.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!    if (right != static_cast<Id_Map_Entry_Node>(0))
        {
           status = right->set_id_map_node(i);
***************
*** 3519,3523 ****
              } /* |if (status != 0)|  */
  
!       } /* |if (right != 0)|  */
   
  
--- 3529,3533 ----
              } /* |if (status != 0)|  */
  
!       } /* |if (right != static_cast<Id_Map_Entry_Node>(0))|  */
   
  
***************
*** 3611,3615 ****
    Scanner_Node scanner_node = 0;
  
!   if (id_map_node != 0 && id_map_node->scanner_node != 0)
      scanner_node = id_map_node->scanner_node;
    
--- 3621,3626 ----
    Scanner_Node scanner_node = 0;
  
!   if (   id_map_node != static_cast<Id_Map_Node>(0) 
!       && id_map_node->scanner_node != static_cast<Scanner_Node>(0))
      scanner_node = id_map_node->scanner_node;
    
***************
*** 3618,3622 ****
    bool error_stop_value;
  
!   if (scanner_node != 0)
      error_stop_value = (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
        ? true : false;
--- 3629,3633 ----
    bool error_stop_value;
  
!   if (scanner_node != static_cast<Scanner_Node>(0))
      error_stop_value = (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
        ? true : false;
***************
*** 3636,3640 ****
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       if (scanner_node != 0 &&
            (   scanner_node->get_run_state()->multithread_input 
             || scanner_node->get_run_state()->multithread_output
--- 3647,3651 ----
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       if (scanner_node != static_cast<Scanner_Node>(0) &&
            (   scanner_node->get_run_state()->multithread_input 
             || scanner_node->get_run_state()->multithread_output
***************
*** 3650,3666 ****
  
  
! @q ***** (5) |scanner_node == 0| or not using multithreading.@>   
  
! @ |scanner_node == 0| or not using multithreading.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else /* |scanner_node == 0| or not using multithreading.  */
          {
!           thread_info = 0;
            thread_name = "";
  
!         } /* |else| (|scanner_node == 0| or not using multithreading.)  */
  
  
--- 3661,3678 ----
  
  
! @q ***** (5) |scanner_node == static_cast<Scanner_Node>(0)| or not using multithreading.@>   
  
! @ |scanner_node == static_cast<Scanner_Node>(0)| or not using multithreading.
  \initials{LDF 2004.09.17.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else /* |scanner_node == static_cast<Scanner_Node>(0)| or not using multithreading.  */
          {
!           thread_info = static_cast<Thread_Info_Type*>(0);
            thread_name = "";
  
!         } /* |else| (|scanner_node == static_cast<Scanner_Node>(0)| 
!                      or not using multithreading.)  */
  
  
***************
*** 3693,3702 ****
  
  
!     if (s->left != 0)
        set_subordinate_array(s->left, true, type);
  
  
  
!    if (s->object != 0)
       {
  #if DEBUG_COMPILE
--- 3705,3714 ----
  
  
!     if (s->left != static_cast<Id_Map_Entry_Node>(0))
        set_subordinate_array(s->left, true, type);
  
  
  
!    if (s->object != static_cast<void*>(0))
       {
  #if DEBUG_COMPILE
***************
*** 3764,3771 ****
  
  
!      } /* |if (s->object != 0)|  */
  
     
!    if (s->right != 0)
       set_subordinate_array(s->right, true, type);
  
--- 3776,3783 ----
  
  
!      } /* |if (s->object != static_cast<void*>(0))|  */
  
     
!    if (s->right != static_cast<Id_Map_Entry_Node>(0))
       set_subordinate_array(s->right, true, type);
  
***************
*** 3878,3889 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q ***** (5) Error handling:  |object == 0|.@>
  
! @ Error handling:  |object == 0|.
  \initials{LDF 2004.09.29.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (object == 0)
      {
        cerr_strm << thread_name 
--- 3890,3901 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
! @q ***** (5) Error handling:  |object == static_cast<void*>(0)|.@>
  
! @ Error handling:  |object == static_cast<void*>(0)|.
  \initials{LDF 2004.09.29.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (object == static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 3895,3899 ****
        return INVALID_TRANSFORM;
  
!     } /* |if (object == 0)|  */
  
  @q ***** (5).@> 
--- 3907,3911 ----
        return INVALID_TRANSFORM;
  
!     } /* |if (object == static_cast<void*>(0))|  */
  
  @q ***** (5).@> 
***************
*** 4374,4381 ****
     Scanner_Node scanner_node;
  
!    if (id_map_node != 0)
       scanner_node = id_map_node->scanner_node;
     else 
!      scanner_node = 0;
  
  
--- 4386,4393 ----
     Scanner_Node scanner_node;
  
!    if (id_map_node != static_cast<Id_Map_Node>(0))
       scanner_node = id_map_node->scanner_node;
     else 
!      scanner_node = static_cast<Scanner_Node>(0);
  
  
***************
*** 4395,4406 ****
    
  
! @q ***** (5) |scanner_node != 0|.@>   
  
! @ |scanner_node != 0|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (scanner_node) /* |scanner_node != 0|  */
      {
     
--- 4407,4418 ----
    
  
! @q ***** (5) |scanner_node != static_cast<Scanner_Node>(0)|.@>   
  
! @ |scanner_node != static_cast<Scanner_Node>(0)|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (scanner_node != static_cast<Scanner_Node>(0)) 
      {
     
***************
*** 4425,4452 ****
  
  
! @q ****** (6) |scanner_node != 0|, but not using multithreading.@>   
  
! @ |scanner_node != 0|, but not using multithreading.
  \initials{LDF 2004.08.23.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else /* |scanner_node != 0|, but not using multithreading.  */
          {
!           thread_info = 0;
            thread_name = "";
  
!         } /* |else| (|scanner_node != 0|, but not using multithreading.)  */
  
      } /* |if (scanner_node)|  */
  
  
! @q ***** (5) |scanner_node == 0|.  Assume we're using multithreading.@>   
! 
! @ |scanner_node == 0|.  Assume we're using multithreading.
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   else /* (|scanner_node == 0|)  */
      {
  
--- 4437,4464 ----
  
  
! @q ****** (6) |scanner_node != static_cast<Scanner_Node>(0)|, but not using multithreading.@> 
  
! @ |scanner_node != static_cast<Scanner_Node>(0)|, but not using multithreading.
  \initials{LDF 2004.08.23.}
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!       else /* |scanner_node != static_cast<Scanner_Node>(0)|, but not using multithreading.  */
          {
!           thread_info = static_cast<Thread_Info_Type*>(0);
            thread_name = "";
  
!         } /* |else| (|scanner_node != static_cast<Scanner_Node>(0)|, 
!                      but not using multithreading.)  */
  
      } /* |if (scanner_node)|  */
  
  
! @q ***** (5) |scanner_node == static_cast<Scanner_Node>(0)|.  Assume we're using multithreading.@>
! @ |scanner_node == static_cast<Scanner_Node>(0)|.  Assume we're using multithreading.
  
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   else /* (|scanner_node == static_cast<Scanner_Node>(0)|)  */
      {
  
***************
*** 4455,4459 ****
  
  
!     } /* |else| (|scanner_node == 0|)  */
  
  #else  /* |HAVE_PTHREAD_H| is undefined.  */@;  
--- 4467,4471 ----
  
  
!     } /* |else| (|scanner_node == static_cast<Scanner_Node>(0)|)  */
  
  #else  /* |HAVE_PTHREAD_H| is undefined.  */@;  
***************
*** 4473,4477 ****
    bool error_stop_value;
  
!   if (scanner_node != 0)
      error_stop_value 
         = (   scanner_node->get_run_state()->error_stop_mode 
--- 4485,4489 ----
    bool error_stop_value;
  
!   if (scanner_node != static_cast<Scanner_Node>(0))
      error_stop_value 
         = (   scanner_node->get_run_state()->error_stop_mode 
***************
*** 4657,4661 ****
  
  
!   if (object != 0)
      {
  
--- 4669,4673 ----
  
  
!   if (object != static_cast<void*>(0))
      {
  
***************
*** 5037,5042 ****
        else if (type == COLOR_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5049,5054 ----
        else if (type == COLOR_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5044,5048 ****
                if (verbose)
                   {
!                     cerr_strm << "object != 0.";
                
                      log_message(cerr_strm); 
--- 5056,5060 ----
                if (verbose)
                   {
!                     cerr_strm << "object != static_cast<void*>(0).";
                
                      log_message(cerr_strm); 
***************
*** 5058,5062 ****
                
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == COLOR_VECTOR)|  */
--- 5070,5074 ----
                
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == COLOR_VECTOR)|  */
***************
*** 5077,5082 ****
        else if (type == POINT_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5089,5094 ----
        else if (type == POINT_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5085,5089 ****
                if (verbose)
                    {
!                       cerr_strm << "object != 0.";
                
                        log_message(cerr_strm); 
--- 5097,5101 ----
                if (verbose)
                    {
!                       cerr_strm << "object != static_cast<void*>(0).";
                
                        log_message(cerr_strm); 
***************
*** 5100,5104 ****
                
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == POINT_VECTOR)|  */
--- 5112,5116 ----
                
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == POINT_VECTOR)|  */
***************
*** 5119,5124 ****
        else if (type == BOOL_POINT_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5131,5136 ----
        else if (type == BOOL_POINT_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5126,5130 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5138,5142 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5141,5145 ****
                
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == BOOL_POINT_VECTOR)|  */
--- 5153,5157 ----
                
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == BOOL_POINT_VECTOR)|  */
***************
*** 5161,5166 ****
        else if (type == PATH_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5173,5178 ----
        else if (type == PATH_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5168,5172 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5180,5184 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5183,5187 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == PATH_VECTOR)|  */
--- 5195,5199 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == PATH_VECTOR)|  */
***************
*** 5201,5206 ****
        else if (type == ELLIPSE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5213,5218 ----
        else if (type == ELLIPSE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5208,5212 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5220,5224 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5223,5227 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == ELLIPSE_VECTOR)|  */
--- 5235,5239 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == ELLIPSE_VECTOR)|  */
***************
*** 5242,5247 ****
        else if (type == CIRCLE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5254,5259 ----
        else if (type == CIRCLE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5249,5253 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5261,5265 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5264,5268 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == CIRCLE_VECTOR)|  */
--- 5276,5280 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == CIRCLE_VECTOR)|  */
***************
*** 5282,5287 ****
        else if (type == PARABOLA_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5294,5299 ----
        else if (type == PARABOLA_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5289,5293 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5301,5305 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5304,5308 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == PARABOLA_VECTOR)|  */
--- 5316,5320 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == PARABOLA_VECTOR)|  */
***************
*** 5322,5327 ****
        else if (type == HYPERBOLA_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5334,5339 ----
        else if (type == HYPERBOLA_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5329,5333 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5341,5345 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5344,5348 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == HYPERBOLA_VECTOR)|  */
--- 5356,5360 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == HYPERBOLA_VECTOR)|  */
***************
*** 5362,5367 ****
        else if (type == ARC_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5374,5379 ----
        else if (type == ARC_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5369,5373 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5381,5385 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5384,5388 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == ARC_VECTOR)|  */
--- 5396,5400 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == ARC_VECTOR)|  */
***************
*** 5404,5409 ****
        else if (type == CONIC_SECTION_LATTICE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5416,5421 ----
        else if (type == CONIC_SECTION_LATTICE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5411,5415 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5423,5427 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5426,5430 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == CONIC_SECTION_LATTICE_VECTOR)|  */
--- 5438,5442 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == CONIC_SECTION_LATTICE_VECTOR)|  */
***************
*** 5445,5450 ****
        else if (type == HELIX_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5457,5462 ----
        else if (type == HELIX_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5452,5456 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5464,5468 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5467,5471 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == HELIX_VECTOR)|  */
--- 5479,5483 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == HELIX_VECTOR)|  */
***************
*** 5485,5490 ****
        else if (type == POLYGON_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5497,5502 ----
        else if (type == POLYGON_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5492,5496 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5504,5508 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5507,5511 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == POLYGON_VECTOR)|  */
--- 5519,5523 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == POLYGON_VECTOR)|  */
***************
*** 5525,5530 ****
        else if (type == RECTANGLE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5537,5542 ----
        else if (type == RECTANGLE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5532,5536 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5544,5548 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5547,5551 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == RECTANGLE_VECTOR)|  */
--- 5559,5563 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == RECTANGLE_VECTOR)|  */
***************
*** 5565,5570 ****
        else if (type == REG_POLYGON_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5577,5582 ----
        else if (type == REG_POLYGON_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5572,5576 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5584,5588 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5587,5591 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == REG_POLYGON_VECTOR)|  */
--- 5599,5603 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == REG_POLYGON_VECTOR)|  */
***************
*** 5606,5611 ****
        else if (type == CONE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5618,5623 ----
        else if (type == CONE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5613,5617 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5625,5629 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5628,5632 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == CONE_VECTOR)|  */
--- 5640,5644 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == CONE_VECTOR)|  */
***************
*** 5647,5652 ****
        else if (type == CYLINDER_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5659,5664 ----
        else if (type == CYLINDER_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5654,5658 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5666,5670 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5669,5673 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == CYLINDER_VECTOR)|  */
--- 5681,5685 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == CYLINDER_VECTOR)|  */
***************
*** 5690,5695 ****
        else if (type == CUBOID_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5702,5707 ----
        else if (type == CUBOID_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5697,5701 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5709,5713 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5712,5716 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == CUBOID_VECTOR)|  */
--- 5724,5728 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == CUBOID_VECTOR)|  */
***************
*** 5731,5736 ****
        else if (type == ELLIPSOID_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5743,5748 ----
        else if (type == ELLIPSOID_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5738,5742 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5750,5754 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5753,5757 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == ELLIPSOID_VECTOR)|  */
--- 5765,5769 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == ELLIPSOID_VECTOR)|  */
***************
*** 5772,5777 ****
        else if (type == SPHERE_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5784,5789 ----
        else if (type == SPHERE_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5779,5783 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5791,5795 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5794,5798 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == SPHERE_VECTOR)|  */
--- 5806,5810 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == SPHERE_VECTOR)|  */
***************
*** 5812,5817 ****
        else if (type == PARABOLOID_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5824,5829 ----
        else if (type == PARABOLOID_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5819,5823 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5831,5835 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5834,5838 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == PARABOLOID_VECTOR)|  */
--- 5846,5850 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == PARABOLOID_VECTOR)|  */
***************
*** 5853,5858 ****
        else if (type == HYPERBOLOID_VECTOR)
          {
!           if (verbose && object == 0)
!             cerr_strm << "object == 0.";
                
            else
--- 5865,5870 ----
        else if (type == HYPERBOLOID_VECTOR)
          {
!           if (verbose && object == static_cast<void*>(0))
!             cerr_strm << "object == static_cast<void*>(0).";
                
            else
***************
*** 5860,5864 ****
                 if (verbose)   
                    {
!                      cerr_strm << "object != 0.";
                
                       log_message(cerr_strm); 
--- 5872,5876 ----
                 if (verbose)   
                    {
!                      cerr_strm << "object != static_cast<void*>(0).";
                
                       log_message(cerr_strm); 
***************
*** 5875,5879 ****
               
  
!             } /* |else| (|object != 0|)  */
              
          } /* |else if (type == HYPERBOLOID_VECTOR)|  */
--- 5887,5891 ----
               
  
!             } /* |else| (|object != static_cast<void*>(0)|)  */
              
          } /* |else if (type == HYPERBOLOID_VECTOR)|  */
***************
*** 5895,5904 ****
          }
  
!     } /* |if (object != 0)|  */
  
  
! @q **** (4) |object == 0|.  Can't show it.@>
  
! @ |object == 0|.  Can't show it.
  \initials{LDF 2004.10.26.}
  
--- 5907,5916 ----
          }
  
!     } /* |if (object != static_cast<void*>(0))|  */
  
  
! @q **** (4) |object == static_cast<void*>(0)|.  Can't show it.@>
  
! @ |object == static_cast<void*>(0)|.  Can't show it.
  \initials{LDF 2004.10.26.}
  
***************
*** 5906,5912 ****
   
  
!    else if (verbose) /* (|object == 0|)  */
        {    
!          cerr_strm << "object == 0.  Can't show it.";
        
           log_message(cerr_strm); 
--- 5918,5924 ----
   
  
!    else if (verbose) /* (|object == static_cast<void*>(0)|)  */
        {    
!          cerr_strm << "object == static_cast<void*>(0).  Can't show it.";
        
           log_message(cerr_strm); 
***************
*** 5914,5918 ****
           cerr_strm.str("");
  
!       } /* |else if (verbose)| (|object == 0|)  */
  
  @q **** (4)@>
--- 5926,5930 ----
           cerr_strm.str("");
  
!       } /* |else if (verbose)| (|object == static_cast<void*>(0)|)  */
  
  @q **** (4)@>
***************
*** 5924,5928 ****
      {
  
!       if (up == 0)
           cerr_strm << "up == 0";
        else 
--- 5936,5940 ----
      {
  
!       if (up == static_cast<Id_Map_Entry_Node>(0))
           cerr_strm << "up == 0";
        else 
***************
*** 5933,5937 ****
        cerr_strm.str("");
   
!       if (left == 0)
            cerr_strm << "left == 0";
        else
--- 5945,5949 ----
        cerr_strm.str("");
   
!       if (left == static_cast<Id_Map_Entry_Node>(0))
            cerr_strm << "left == 0";
        else
***************
*** 5949,5953 ****
  
  
!      if (right == 0)
         cerr_strm << "right == 0";
       else
--- 5961,5965 ----
  
  
!      if (right == static_cast<Id_Map_Entry_Node>(0))
         cerr_strm << "right == 0";
       else
***************
*** 5965,5969 ****
  
  
!      if (superordinate_vector == 0)
         cerr_strm << "superordinate_vector == 0";
  
--- 5977,5981 ----
  
  
!      if (superordinate_vector == static_cast<Id_Map_Entry_Node>(0))
         cerr_strm << "superordinate_vector == 0";
  
***************
*** 5974,5978 ****
  
  
!      if (subordinate_array == 0)
         cerr_strm << "subordinate_array == 0";
  
--- 5986,5990 ----
  
  
!      if (subordinate_array == static_cast<Id_Map_Entry_Node>(0))
         cerr_strm << "subordinate_array == 0";
  
***************
*** 5990,5999 ****
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (traverse && left != 0)
      {
        left->show(left->name, true);
      }
  
!   if (traverse && right != 0)
      {
        right->show(right->name, true);
--- 6002,6011 ----
  @<Define |Id_Map_Entry_Type| functions@>=
  
!   if (traverse && left != static_cast<Id_Map_Entry_Node>(0))
      {
        left->show(left->name, true);
      }
  
!   if (traverse && right != static_cast<Id_Map_Entry_Node>(0))
      {
        right->show(right->name, true);
diff -rc2P 3DLDF-2.0.2/src/io.web 3DLDF-2.0.3/src/io.web
*** 3DLDF-2.0.2/src/io.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/io.web	Fri Dec 13 15:42:52 2013
***************
*** 272,276 ****
     if (DEBUG)
       cerr << "Entering `Io_Struct::~Io_Struct()'."  
!           << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 272,276 ----
     if (DEBUG)
       cerr << "Entering `Io_Struct::~Io_Struct()'."  
!           << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 279,283 ****
     if (DEBUG)
       cerr << "Exiting `Io_Struct::~Io_Struct()'."  
!           << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 279,283 ----
     if (DEBUG)
       cerr << "Exiting `Io_Struct::~Io_Struct()'."  
!           << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 342,347 ****
  Input_Struct::Input_Struct(void)
  {
!   stream_ptr = 0;
!   up = 0;
  }
  
--- 342,347 ----
  Input_Struct::Input_Struct(void)
  {
!   stream_ptr = static_cast<istream*>(0);
!   up = static_cast<Input_Struct*>(0);
  }
  
***************
*** 400,404 ****
     if (DEBUG)
       cerr << "Entering `Input_Struct' destructor."
!           << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 400,404 ----
     if (DEBUG)
       cerr << "Entering `Input_Struct' destructor."
!           << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 411,415 ****
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "Closing " << filename << ".\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 411,415 ----
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "Closing " << filename << ".\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 420,435 ****
          
  
!   if (type == FILE_TYPE && stream_ptr != 0)
      {
  #if DEBUG_COMPILE
        if (DEBUG) 
          cerr << "Deleting stream_ptr and pointing it at 0"
!              << ".\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
        delete (stream_ptr);
!       stream_ptr = 0;
  
!     }  /* |if (type == FILE_TYPE && stream_ptr != 0)|  */
  
  
--- 420,435 ----
          
  
!   if (type == FILE_TYPE && stream_ptr != static_cast<ifstream*>(0))
      {
  #if DEBUG_COMPILE
        if (DEBUG) 
          cerr << "Deleting stream_ptr and pointing it at 0"
!              << ".\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
        delete (stream_ptr);
!       stream_ptr = static_cast<ifstream*>(0);
  
!     }  /* |if (type == FILE_TYPE && stream_ptr != static_cast<ifstream*>(0))|  */
  
  
***************
*** 461,465 ****
  
  #if 0 
!   while (up != 0)
      {
  
--- 461,465 ----
  
  #if 0 
!   while (up != static_cast<Input_Struct*>(0))
      {
  
***************
*** 468,472 ****
          {
            cerr << "`up' " << j++ << " is non-null. Deleting"
!                << "\n" << flush;
          }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 468,472 ----
          {
            cerr << "`up' " << j++ << " is non-null. Deleting"
!                << "\n";
          }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 475,479 ****
        up = i->up;
        delete i;
!       i = 0;
      }
  #endif  
--- 475,479 ----
        up = i->up;
        delete i;
!       i = static_cast<Input_Struct*>(0);
      }
  #endif  
***************
*** 491,506 ****
  @<Define |Input_Struct| functions@>=
  
!   if (type == SCANTOKENS_STRING_TYPE && stream_ptr != 0)
      {
  #if DEBUG_COMPILE
        if (DEBUG) 
          cerr << "Deleting stream_ptr and pointing it at 0"
!              << ".\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
        delete (stream_ptr);
!       stream_ptr = 0;
  
!     }  /* |if (type == SCANTOKENS_STRING_TYPE && stream_ptr != 0)|  */
    
  
--- 491,506 ----
  @<Define |Input_Struct| functions@>=
  
!   if (type == SCANTOKENS_STRING_TYPE && stream_ptr != static_cast<istream*>(0))
      {
  #if DEBUG_COMPILE
        if (DEBUG) 
          cerr << "Deleting stream_ptr and pointing it at 0"
!              << ".\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
        delete (stream_ptr);
!       stream_ptr = static_cast<istream*>(0);
  
!     }  /* |if (type == SCANTOKENS_STRING_TYPE && stream_ptr != static_cast<istream*>(0))|  */
    
  
***************
*** 517,527 ****
  @<Define |Input_Struct| functions@>=
  
!   if (type == MACRO_STRING_TYPE && stream_ptr != 0)
      {
  
        delete stream_ptr;
!       stream_ptr = 0;
  
!     }  /* |if (type == MACRO_STRING_TYPE && stream_ptr != 0)|  */
    
  
--- 517,527 ----
  @<Define |Input_Struct| functions@>=
  
!   if (type == MACRO_STRING_TYPE && stream_ptr != static_cast<istream*>(0))
      {
  
        delete stream_ptr;
!       stream_ptr = static_cast<istream*>(0);
  
!     }  /* |if (type == MACRO_STRING_TYPE && stream_ptr != static_cast<istream*>(0))|  */
    
  
***************
*** 540,544 ****
       {
         cerr << "Exiting `Input_Struct' destructor."
!             << "\n" << flush;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 540,544 ----
       {
         cerr << "Exiting `Input_Struct' destructor."
!             << "\n";
       }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 604,608 ****
  Output_Struct::Output_Struct(void)
  {
!   stream_ptr = 0;
  }
  
--- 604,608 ----
  Output_Struct::Output_Struct(void)
  {
!   stream_ptr = static_cast<ostream*>(0);
  }
  
***************
*** 636,640 ****
    if (DEBUG) 
      cerr << "Entering `Output_Struct' destructor."
!          << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 636,640 ----
    if (DEBUG) 
      cerr << "Entering `Output_Struct' destructor."
!          << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 646,650 ****
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "Closing " << filename << ".\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
            
--- 646,650 ----
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "Closing " << filename << ".\n";
  #endif /* |DEBUG_COMPILE|  */@; 
            
***************
*** 653,657 ****
      } /* |if (type == FILE_TYPE)|  */@;
      
!   if (stream_ptr != 0)
      {
            
--- 653,657 ----
      } /* |if (type == FILE_TYPE)|  */@;
      
!   if (stream_ptr != static_cast<ostream*>(0))
      {
            
***************
*** 659,663 ****
        if (DEBUG) 
          cerr << "Deleting `stream_ptr' and pointing it at 0."
!              << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 659,663 ----
        if (DEBUG) 
          cerr << "Deleting `stream_ptr' and pointing it at 0."
!              << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1012,1016 ****
    friend class Id_Map_Type;
    friend class Scanner_Type;
!   friend int yyparse(void*);
  
    @<|friend| declarations for functions in |namespace Scan_Parse|@>@;
--- 1012,1016 ----
    friend class Id_Map_Type;
    friend class Scanner_Type;
!   friend int yyparse(yyscan_t);
  
    @<|friend| declarations for functions in |namespace Scan_Parse|@>@;
***************
*** 1714,1718 ****
    friend class Scanner_Type;
    friend class Id_Map_Entry_Type;
!   friend int yyparse(void*);
  
  
--- 1714,1718 ----
    friend class Scanner_Type;
    friend class Id_Map_Entry_Type;
!   friend int yyparse(yyscan_t);
  
  
***************
*** 1798,1802 ****
        n = iter->second;
  
!       if (n != 0)
          {
  
--- 1798,1802 ----
        n = iter->second;
  
!       if (n != static_cast<Id_Map_Entry_Node>(0))
          {
  
***************
*** 1835,1839 ****
          n = 0;
  
!         } /* |if (n != 0)|  */
  
      } /* |for|  */
--- 1835,1839 ----
          n = 0;
  
!         } /* |if (n != static_cast<Id_Map_Entry_Node>(0))|  */
  
      } /* |for|  */
***************
*** 1850,1854 ****
  
  
!   if (up != 0)
      {
  #if DEBUG_COMPILE
--- 1850,1854 ----
  
  
!   if (up != static_cast<Id_Map_Node>(0))
      {
  #if DEBUG_COMPILE
***************
*** 1868,1876 ****
        up = 0;
  
!     } /* |if (up != 0)|  */
  
  #if DEBUG_COMPILE
  
!   else if (DEBUG) /* (|up == 0|)  */
      {
        cerr_strm << thread_name << "In `Id_Map_Type' destructor:"
--- 1868,1876 ----
        up = 0;
  
!     } /* |if (up != static_cast<Id_Map_Entry_Node>(0))|  */
  
  #if DEBUG_COMPILE
  
!   else if (DEBUG) /* (|up == static_cast<Id_Map_Entry_Node>(0)|)  */
      {
        cerr_strm << thread_name << "In `Id_Map_Type' destructor:"
***************
*** 1882,1886 ****
        cerr_strm.str(""); 
  
!     }   /* |else| (|up == 0|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1882,1886 ----
        cerr_strm.str(""); 
  
!     }   /* |else| (|up == static_cast<Id_Map_Entry_Node>(0)|)  */
  
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1940,1944 ****
        s = "Id_Map_Type:";
  
!    cerr << s << endl << "id_map:" << endl << flush;
  
     for (Id_Map_Const_Iterator iter = id_map.begin();
--- 1940,1944 ----
        s = "Id_Map_Type:";
  
!    cerr << s << endl << "id_map:" << endl;
  
     for (Id_Map_Const_Iterator iter = id_map.begin();
***************
*** 1956,1964 ****
      } /* |for|  */@;
  
!   if (up == 0)
      cerr << "up == 0\n";
    else
      {
!       cerr << "up != 0.  Showing up." << endl << flush;
        up->show();
      }
--- 1956,1964 ----
      } /* |for|  */@;
  
!   if (up == static_cast<Id_Map_Node>(0))
      cerr << "up == 0\n";
    else
      {
!       cerr << "up != 0.  Showing up." << endl;
        up->show();
      }
***************
*** 2159,2163 ****
    limit_value = 0;  
  
!   if (loop_strm_ptr != 0)
      delete loop_strm_ptr; 
  
--- 2159,2163 ----
    limit_value = 0;  
  
!   if (loop_strm_ptr != static_cast<stringstream*>(0))
      delete loop_strm_ptr; 
  
***************
*** 2560,2564 ****
    friend class Rhombic_Triacontahedron;
  
!   friend int yyparse(void*);
    friend int main(int, char**);
  
--- 2560,2564 ----
    friend class Rhombic_Triacontahedron;
  
!   friend int yyparse(yyscan_t);
    friend int main(int, char**);
  
***************
*** 3102,3106 ****
    if (DEBUG)
      cerr << "Entering Scanner_Type::open_default_out_file()" << endl
!          << "format == " << format << endl << flush;
  
  
--- 3102,3106 ----
    if (DEBUG)
      cerr << "Entering Scanner_Type::open_default_out_file()" << endl
!          << "format == " << format << endl;
  
  
***************
*** 3137,3141 ****
        cerr << "ERROR! In Scanner_Type::open_default_out_file():\n"
             << "Invalid `format\' argument: " << format << endl
!            << "Returning `false\'." << endl << endl << flush;
        return false;
      }
--- 3137,3141 ----
        cerr << "ERROR! In Scanner_Type::open_default_out_file():\n"
             << "Invalid `format\' argument: " << format << endl
!            << "Returning `false\'." << endl << endl;
        return false;
      }
***************
*** 3152,3157 ****
            cerr << "ERROR! In Scanner_Type::open_default_out_file():"
                 <<  "Opening " << filename 
!                << " failed!  Returning false.\n\n" 
!                << flush;
            return false;
          }
--- 3152,3157 ----
            cerr << "ERROR! In Scanner_Type::open_default_out_file():"
                 <<  "Opening " << filename 
!                << " failed!  Returning false.\n\n";
! 
            return false;
          }
***************
*** 3166,3170 ****
                   << " succeeded! returning `true\'" << endl
                   << "Exiting Scanner_Type::open_default_out_file()" << endl
!                  << endl << flush;
            return true;
          } /* |else|  */@;
--- 3166,3170 ----
                   << " succeeded! returning `true\'" << endl
                   << "Exiting Scanner_Type::open_default_out_file()" << endl
!                  << endl;
            return true;
          } /* |else|  */@;
***************
*** 3173,3178 ****
      {
        cerr << conditional_string << " == false.  Returning `false\'.\n"
!         << "Exiting Scanner_Type::open_default_out_file()" << endl 
!         << flush; 
        return false;
      }
--- 3173,3178 ----
      {
        cerr << conditional_string << " == false.  Returning `false\'.\n"
!         << "Exiting Scanner_Type::open_default_out_file()" << endl;
! 
        return false;
      }
***************
*** 3392,3401 ****
  {
    bool DEBUG = false; /* |true| */ @; 
!   if (in == 0)
      {
        if (!silent || DEBUG)
          cerr << "WARNING! In Scanner_Type::get_in_filename():\n"
               << "Scanner_Type.in is a null pointer. Returning "
!              << "empty string.\n" << flush;
        return "";
      }
--- 3392,3401 ----
  {
    bool DEBUG = false; /* |true| */ @; 
!   if (in == static_cast<Input_Struct*>(0))
      {
        if (!silent || DEBUG)
          cerr << "WARNING! In Scanner_Type::get_in_filename():\n"
               << "Scanner_Type.in is a null pointer. Returning "
!              << "empty string.\n";
        return "";
      }
***************
*** 3404,3408 ****
        if (DEBUG)
          cerr << "In Scanner_Type::get_in_filename():\n"
!              << "returning " << in->filename << ".\n" << flush;
        return in->filename;
      }
--- 3404,3408 ----
        if (DEBUG)
          cerr << "In Scanner_Type::get_in_filename():\n"
!              << "returning " << in->filename << ".\n";
        return in->filename;
      }
***************
*** 3465,3469 ****
  {
  
!   if (in->up == 0)
      {
        cerr_mutex.lock(); 
--- 3465,3469 ----
  {
  
!   if (in->up == static_cast<Input_Struct*>(0))
      {
        cerr_mutex.lock(); 
***************
*** 3476,3486 ****
        return 1;
  
!     } /* |if (in->up == 0)|  */
  
    Input_Struct* i = in;
    in = in->up;
!   i->up = 0;
    delete i;
!   i = 0;
    
    return 0;
--- 3476,3486 ----
        return 1;
  
!     } /* |if (in->up == static_cast<Input_Struct*>(0))|  */
  
    Input_Struct* i = in;
    in = in->up;
!   i->up = static_cast<Input_Struct*>(0);
    delete i;
!   i = static_cast<Input_Struct*>(0);
    
    return 0;
***************
*** 3857,3861 ****
  #endif /* |DEBUG_COMPILE|  */@; 
    
!   if (root == 0)
      {
  
--- 3857,3861 ----
  #endif /* |DEBUG_COMPILE|  */@; 
    
!   if (root == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 3872,3881 ****
        return static_cast<Id_Map_Entry_Node>(0); 
  
!     } /* |if (root == 0)|  */
  
    int curr_type = root->type;
  
! @q ****** (6) |root->left == 0|.@>  
! @ |root->left == 0|.
  \initials{LDF Undated.}
  
--- 3872,3881 ----
        return static_cast<Id_Map_Entry_Node>(0); 
  
!     } /* |if (root == static_cast<Id_Map_Entry_Node>(0))|  */
  
    int curr_type = root->type;
  
! @q ****** (6) |root->left == static_cast<Id_Map_Entry_Node>(0)|.@>  
! @ |root->left == static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF Undated.}
  
***************
*** 3888,3892 ****
  @<Define |Scanner_Type| functions@>=
  
!   if (root->left == 0 && create_if_none)
      {
  
--- 3888,3892 ----
  @<Define |Scanner_Type| functions@>=
  
!   if (root->left == static_cast<Id_Map_Entry_Node>(0) && create_if_none)
      {
  
***************
*** 3938,3945 ****
        return root->left;
  
!     } /* |if (root->left == 0)|  */
  
! @q ****** (6) |root->left == 0 && !create_if_none|.@> 
! @ |root->left == 0 && !create_if_none|.
  \initials{LDF 2005.01.08.}
  
--- 3938,3945 ----
        return root->left;
  
!     } /* |if (root->left == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |root->left == static_cast<Id_Map_Entry_Node>(0) && !create_if_none|.@> 
! @ |root->left == static_cast<Id_Map_Entry_Node>(0) && !create_if_none|.
  \initials{LDF 2005.01.08.}
  
***************
*** 3951,3955 ****
  @<Define |Scanner_Type| functions@>=
  
!    else if (root->left == 0 && !create_if_none)
        {
  #if DEBUG_COMPILE
--- 3951,3955 ----
  @<Define |Scanner_Type| functions@>=
  
!    else if (root->left == static_cast<Id_Map_Entry_Node>(0) && !create_if_none)
        {
  #if DEBUG_COMPILE
***************
*** 3970,3981 ****
           return 0;
  
!       } /* |else if (root->left == 0 && !create_if_none)|  */
  
! @q ****** (6) |root->left != 0|.@>  
! @ |root->left != 0|.
  @<Define |Scanner_Type| functions@>=
  
  
!   else /* (|root->left != 0|)  */
      {
  
--- 3970,3982 ----
           return 0;
  
!       } /* |else if (   root->left == static_cast<Id_Map_Entry_Node>(0) 
!                      && !create_if_none)|  */
  
! @q ****** (6) |root->left != static_cast<Id_Map_Entry_Node>(0)|.@>  
! @ |root->left != static_cast<Id_Map_Entry_Node>(0)|.
  @<Define |Scanner_Type| functions@>=
  
  
!   else /* (|root->left != static_cast<Id_Map_Entry_Node>(0)|)  */
      {
  
***************
*** 4053,4063 ****
  
  
! @q ****** (6) |(root->left == 0)|.@>  
! @ |(root->left == 0)|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
   
!   if (root->left == 0)
      {
                          
--- 4054,4064 ----
  
  
! @q ****** (6) |(root->left == static_cast<Id_Map_Entry_Node>(0)|.@>  
! @ |(root->left == static_cast<Id_Map_Entry_Node>(0))|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
   
!   if (root->left == static_cast<Id_Map_Entry_Node>(0))
      {
                          
***************
*** 4111,4124 ****
        
  
!     } /* |if (root->left == 0)|  */@;
  
  
! @q ****** (6) |(root->left != 0)|.@>  
! @ |(root->left != 0)|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
  
!   else /* |if (root->left != 0)|  */@;
     {
  
--- 4112,4125 ----
        
  
!     } /* |if (root->left == static_cast<Id_Map_Entry_Node>(0))|  */@;
  
  
! @q ****** (6) |(root->left != static_cast<Id_Map_Entry_Node>(0))|.@>  
! @ |(root->left != static_cast<Id_Map_Entry_Node>(0))|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
  
!   else /* |if (root->left != static_cast<Id_Map_Entry_Node>(0))|  */@;
     {
  
***************
*** 4140,4144 ****
       continue;
  
!    } /* |else| (|root->left != 0|) */@;
  
   } /* |if (s < root->name)|  */@;
--- 4141,4145 ----
       continue;
  
!    } /* |else| (|root->left != static_cast<Id_Map_Entry_Node>(0)|) */@;
  
   } /* |if (s < root->name)|  */@;
***************
*** 4157,4168 ****
                      
  
! @q ****** (6) |root->right == 0|.@>  
  
! @ |root->right == 0|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
  
!                     if (root->right == 0)
                        {
  
--- 4158,4169 ----
                      
  
! @q ****** (6) |root->right == static_cast<Id_Map_Entry_Node>(0)|.@>  
  
! @ |root->right == static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.08.23.}
  
  @<Define |Scanner_Type| functions@>=
  
!                     if (root->right == static_cast<Id_Map_Entry_Node>(0))
                        {
  
***************
*** 4212,4221 ****
                          return root->right;
  
!                       } /* |if (root->right == 0)|  */@;
  
  
! @q ****** (6) |root->right != 0|.@>  
  
! @ |root->right != 0|.
  \initials{LDF 2004.08.23.}
  
--- 4213,4222 ----
                          return root->right;
  
!                       } /* |if (root->right == static_cast<Id_Map_Entry_Node>(0))|  */@;
  
  
! @q ****** (6) |root->right != static_cast<Id_Map_Entry_Node>(0)|.@>  
  
! @ |root->right != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.08.23.}
  
***************
*** 4223,4227 ****
  
  
!                     else /* |root->right != 0| */
                        {
  #if DEBUG_COMPILE
--- 4224,4228 ----
  
  
!                     else /* |root->right != static_cast<Id_Map_Entry_Node>(0)| */
                        {
  #if DEBUG_COMPILE
***************
*** 4242,4246 ****
                          root = root->right;
                          continue;
!                       } /* |else| (|root->right != 0|) */
  
                      } /* |else if (s > root->name)|  */
--- 4243,4247 ----
                          root = root->right;
                          continue;
!                       } /* |else| (|root->right != static_cast<Id_Map_Entry_Node>(0)|) */
  
                      } /* |else if (s > root->name)|  */
***************
*** 4248,4252 ****
                   } /* |for|  */
   
!    } /* |else| (|root->left != 0|)  */
  
  } /* End of |Scanner_Type::get_array_entry| definition.  */
--- 4249,4253 ----
                   } /* |for|  */
   
!    } /* |else| (|root->left != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  } /* End of |Scanner_Type::get_array_entry| definition.  */
***************
*** 4345,4349 ****
      cerr << s << ":" << endl;
  
!   if (in == 0)
      cerr << "in == 0" << endl;
    else
--- 4346,4350 ----
      cerr << s << ":" << endl;
  
!   if (in == static_cast<Input_Struct*>(0))
      cerr << "in == 0" << endl;
    else
***************
*** 4352,4360 ****
    for (int i = Run_State::METAPOST; i <= Run_State::LIBPLOT; ++i)
      {
!       if (out[i] == 0)
          cerr << "out[" << i << "] == 0" << endl;
        else
          cerr << "out[" << i << "]->filename == " << out[i]->filename
!              << endl << flush;
      }
  
--- 4353,4361 ----
    for (int i = Run_State::METAPOST; i <= Run_State::LIBPLOT; ++i)
      {
!       if (out[i] == static_cast<Output_Struct*>(0))
          cerr << "out[" << i << "] == 0" << endl;
        else
          cerr << "out[" << i << "]->filename == " << out[i]->filename
!              << endl;
      }
  
***************
*** 6184,6188 ****
  #ifndef LDF_IO_H_KNOWN
  #define LDF_IO_H_KNOWN
! int yyparse(void*);
  @<Declare I/O |structs|@>@;
  @<Declare I/O functions@>@;
--- 6185,6189 ----
  #ifndef LDF_IO_H_KNOWN
  #define LDF_IO_H_KNOWN
! int yyparse(yyscan_t);
  @<Declare I/O |structs|@>@;
  @<Declare I/O functions@>@;
Only in 3DLDF-2.0.2/src: lib3dldfsp.c
diff -rc2P 3DLDF-2.0.2/src/lines.web 3DLDF-2.0.3/src/lines.web
*** 3DLDF-2.0.2/src/lines.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/lines.web	Thu Dec 12 20:37:05 2013
***************
*** 700,704 ****
  @q ***** (5).@> 
            
!           if (u_z != 0)
              {
  
--- 700,704 ----
  @q ***** (5).@> 
            
!           if (u_z != ZERO_REAL)
              {
  
***************
*** 719,728 ****
                  / u_z;
  
!             } /* |if (u_z != 0)|  */
            
  
  @q ***** (5).@> 
  
!           else if (u_x != 0)
              {
  
--- 719,728 ----
                  / u_z;
  
!             } /* |if (u_z != ZERO_REAL)|  */
            
  
  @q ***** (5).@> 
  
!           else if (u_x != ZERO_REAL)
              {
  
***************
*** 742,751 ****
                  / u_x;
  
!             } /* |else if (u_x != 0)|  */
  
  
  @q ***** (5).@> 
  
!           else if (u_y != 0)
              {
   
--- 742,751 ----
                  / u_x;
  
!             } /* |else if (u_x != ZERO_REAL)|  */
  
  
  @q ***** (5).@> 
  
!           else if (u_y != ZERO_REAL)
              {
   
***************
*** 767,771 ****
                  / u_y;
  
!             } /* |else if (u_y != 0)|  */
  
  @q ***** (5).@> 
--- 767,771 ----
                  / u_y;
  
!             } /* |else if (u_y != ZERO_REAL)|  */
  
  @q ***** (5).@> 
***************
*** 971,981 ****
    if (DEBUG)
      {
!       cerr << "brp.b == " << brp.b << endl << flush;
!       cerr << "brp.r == " << brp.r << endl << flush;
        brp.pt.show("brp.pt");
      }
  
  
!   if (brp.r != 0 || brp.b == false || brp.pt == INVALID_POINT)
      return INVALID_BOOL_POINT;
  
--- 971,981 ----
    if (DEBUG)
      {
!       cerr << "brp.b == " << brp.b << endl;
!       cerr << "brp.r == " << brp.r << endl;
        brp.pt.show("brp.pt");
      }
  
  
!   if (brp.r != ZERO_REAL || brp.b == false || brp.pt == INVALID_POINT)
      return INVALID_BOOL_POINT;
  
***************
*** 989,996 ****
    if (DEBUG) 
      {
!       cerr << "br_p.first == " << br_p.first << endl << flush;
!       cerr << "br_p.second == " << br_p.second << endl << flush;
!       cerr << "br_q.first == " << br_q.first << endl << flush;
!       cerr << "br_q.second == " << br_q.second << endl << flush;
      }
  
--- 989,996 ----
    if (DEBUG) 
      {
!       cerr << "br_p.first == " << br_p.first << endl;
!       cerr << "br_p.second == " << br_p.second << endl;
!       cerr << "br_q.first == " << br_q.first << endl;
!       cerr << "br_q.second == " << br_q.second << endl;
      }
  
diff -rc2P 3DLDF-2.0.2/src/main.web 3DLDF-2.0.3/src/main.web
*** 3DLDF-2.0.2/src/main.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/main.web	Thu Dec 12 20:38:07 2013
***************
*** 185,190 ****
--- 185,192 ----
  #include "prrfnc0.h++"
  
+ #if 0 
  #include "parser2.h++"   
  #include "scanner2.h++"   
+ #endif 
  
  @q * (1) Scanning and parsing input.@>
***************
*** 203,210 ****
  @<Declare scanning and parsing functions@>=
  int
! yyparse (void*);
  
  int
! zzparse (void*);
  
  @q ** yywrap. @>
--- 205,214 ----
  @<Declare scanning and parsing functions@>=
  int
! yyparse(yyscan_t);
  
+ #if 0 
  int
! zzparse (yyscan_t);
! #endif 
  
  @q ** yywrap. @>
***************
*** 323,327 ****
  @<GCC command line option processing@>=
  {
!   bool DEBUG = true; /* |false| */ 
    int option_ctr;
    int digit_optind = 0;
--- 327,331 ----
  @<GCC command line option processing@>=
  {
!   bool DEBUG = false; /* |true| */ 
    int option_ctr;
    int digit_optind = 0;
***************
*** 393,397 ****
          if (optarg)
            cerr << "optarg == " << optarg << endl;
-         cerr << flush;
        }
  #endif     
--- 397,400 ----
***************
*** 1062,1066 ****
        curr_scanner_node = Scanner_Type::create(s, run_state_initial, true);
  
!       if (curr_scanner_node == 0)
           {
              cerr << "ERROR! In main(): "
--- 1065,1069 ----
        curr_scanner_node = Scanner_Type::create(s, run_state_initial, true);
  
!       if (curr_scanner_node == static_cast<Scanner_Node>(0))
           {
              cerr << "ERROR! In main(): "
***************
*** 1319,1323 ****
          } /* |if ( vector_size  == 0)| */ @;
  
! @q *** At least one filename argument.  @>
  @ At least one filename argument.
  
--- 1322,1326 ----
          } /* |if ( vector_size  == 0)| */ @;
  
! @q *** (3) At least one filename argument.  @>
  @ At least one filename argument.
  
diff -rc2P 3DLDF-2.0.2/src/matrices.web 3DLDF-2.0.3/src/matrices.web
*** 3DLDF-2.0.2/src/matrices.web	Thu Nov  7 13:36:08 2013
--- 3DLDF-2.0.3/src/matrices.web	Thu Dec 12 20:38:43 2013
***************
*** 863,867 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 863,867 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 1063,1067 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 1063,1067 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 3160,3164 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 3160,3164 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 3175,3179 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 3175,3179 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
diff -rc2P 3DLDF-2.0.2/src/mtrxassn.w 3DLDF-2.0.3/src/mtrxassn.w
*** 3DLDF-2.0.2/src/mtrxassn.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/mtrxassn.w	Thu Dec 12 14:29:25 2013
***************
*** 123,127 ****
    }   
  
!   @=$$@> = 0;
  
  };
--- 123,127 ----
    }   
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 167,171 ****
  #endif 
  
!   @=$$@> = 0;
  
  };
--- 167,171 ----
  #endif 
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 202,206 ****
    }   
  
!   @=$$@> = 0;
  
  };
--- 202,206 ----
    }   
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 236,240 ****
    }   
  
!   @=$$@> = 0;
  
  };
--- 236,240 ----
    }   
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 270,274 ****
    }   
  
!   @=$$@> = 0;
  
  };
--- 270,274 ----
    }   
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 305,309 ****
    }   
  
!   @=$$@> = 0;
  
  };
--- 305,309 ----
    }   
  
!   @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/mtrxexpr.w 3DLDF-2.0.3/src/mtrxexpr.w
*** 3DLDF-2.0.2/src/mtrxexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/mtrxexpr.w	Thu Dec 12 20:40:32 2013
***************
*** 88,103 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
!   else /* |entry != 0 && entry->object != 0|  */
! 
!     @=$$@> = static_cast<void*>(create_new<Matrix>(
                                    static_cast<Matrix*>(
                                       entry->object))); 
  
  };
--- 88,106 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (   entry == static_cast<Id_Map_Entry_Node>(0) 
!               || entry->object == static_cast<void*>(0))|  */
  
!   else 
!   {
!       @=$$@> = static_cast<void*>(create_new<Matrix>(
                                    static_cast<Matrix*>(
                                       entry->object))); 
+   }
+  
  
  };
***************
*** 147,165 ****
        = static_cast<Pointer_Vector<Matrix>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == 0|.@> 
  
! @ Error handling:  |pv == 0|.
  \initials{LDF 2007.11.28.}
  
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
!       }  /* |if (pv == 0)|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
--- 150,168 ----
        = static_cast<Pointer_Vector<Matrix>*>(@=$2@>);
  
! @q ******* (7) Error handling:  |pv == static_cast<Pointer_Vector<Matrix>*>(0)|.@> 
  
! @ Error handling:  |pv == static_cast<Pointer_Vector<Matrix>*>(0)|.
  \initials{LDF 2007.11.28.}
  
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Matrix>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
!       }  /* |if (pv == static_cast<Pointer_Vector<Matrix>*>(0))|  */
  
  @q ******* (7) Error handling:  |pv->ctr == 0|.@> 
***************
*** 174,184 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != 0 && pv->ctr > 0|.@> 
  
! @ |pv != 0 && pv->ctr > 0|.  Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.11.28.}
  
--- 177,188 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
  
! @q ******* (7) |pv != static_cast<Pointer_Vector<Matrix>*>(0) && pv->ctr > 0|.@> 
  
! @ |pv != static_cast<Pointer_Vector<Matrix>*>(0) && pv->ctr > 0|.  
! Set |@=$$@>| to |*(pv->v[pv->ctr - 1])|.
  \initials{LDF 2007.11.28.}
  
diff -rc2P 3DLDF-2.0.2/src/mtrxvxpr.w 3DLDF-2.0.3/src/mtrxvxpr.w
*** 3DLDF-2.0.2/src/mtrxvxpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/mtrxvxpr.w	Fri Dec 13 12:04:41 2013
***************
*** 114,118 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 114,118 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 131,135 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 131,135 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/nurbs.web 3DLDF-2.0.3/src/nurbs.web
*** 3DLDF-2.0.2/src/nurbs.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/nurbs.web	Thu Dec 12 20:42:21 2013
***************
*** 1643,1647 ****
  Nurb::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
--- 1643,1647 ----
  Nurb::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
***************
*** 1689,1693 ****
  Nurb::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 1689,1693 ----
  Nurb::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 1735,1742 ****
  Nurb::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 1735,1742 ----
  Nurb::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 1785,1789 ****
  Nurb::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == 0)
        pen_vector = new Pointer_Vector<Pen>;
  
--- 1785,1789 ----
  Nurb::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        pen_vector = new Pointer_Vector<Pen>;
  
***************
*** 1829,1833 ****
  Nurb::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == 0)
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
--- 1829,1833 ----
  Nurb::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
***************
*** 1915,1919 ****
  #endif /* |DEBUG_COMPILE|  */@; 
      
! @q **** (4) |p == 0|.@>   
  
  #if DEBUG_COMPILE
--- 1915,1919 ----
  #endif /* |DEBUG_COMPILE|  */@; 
      
! @q **** (4) |p == 0U|.@>   
  
  #if DEBUG_COMPILE
***************
*** 1924,1928 ****
  #endif /* |DEBUG_COMPILE|  */@; 
   
!    if (p == 0)
        {
  
--- 1924,1928 ----
  #endif /* |DEBUG_COMPILE|  */@; 
   
!    if (p == 0U)
        {
  
***************
*** 1965,1973 ****
  
  
!       }  /* |if (p == 0)|  */
  
! @q **** (4) |p != 0|.@>   
  
!    else  /* |p != 0|  */
        {
            real coefficient_1;
--- 1965,1973 ----
  
  
!       }  /* |if (p == 0U)|  */
  
! @q **** (4) |p != 0U|.@>   
  
!    else  /* |p != 0U|  */
        {
            real coefficient_1;
***************
*** 1988,1992 ****
  
  
!           if (coefficient_1 != 0)
               {
                  coefficient_1 = (u - *(knots[i])) / coefficient_1;
--- 1988,1992 ----
  
  
!           if (coefficient_1 != ZERO_REAL)
               {
                  coefficient_1 = (u - *(knots[i])) / coefficient_1;
***************
*** 2015,2019 ****
  
  
!           if (coefficient_2 != 0)
               {
                  coefficient_2 =  (*(knots[i + p + 1]) - u) / coefficient_2;
--- 2015,2019 ----
  
  
!           if (coefficient_2 != ZERO_REAL)
               {
                  coefficient_2 =  (*(knots[i + p + 1]) - u) / coefficient_2;
***************
*** 2037,2041 ****
            return value_1 + value_2;
  
!       }  /* |else| (|p != 0|)  */
  
  
--- 2037,2041 ----
            return value_1 + value_2;
  
!       }  /* |else| (|p != 0U|)  */
  
  
diff -rc2P 3DLDF-2.0.2/src/parabola.web 3DLDF-2.0.3/src/parabola.web
*** 3DLDF-2.0.2/src/parabola.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/parabola.web	Thu Dec 12 20:52:16 2013
***************
*** 243,248 ****
  
  
! @q **** (4) |options == 0|.  Use defaults.@> 
! @ |options == 0|.  Use defaults.
  \initials{LDF 2005.11.07.}
  
--- 243,248 ----
  
  
! @q **** (4) |options == static_cast<Parabola_Set_Option_Struct*>(0)|.  Use defaults.@> 
! @ |options == static_cast<Parabola_Set_Option_Struct*>(0)|.  Use defaults.
  \initials{LDF 2005.11.07.}
  
***************
*** 250,257 ****
  
  
!     if (!options)  /* Use defaults.  Not programmed yet.
!                       LDF 2005.11.07.  */
         {
  
              vertex_0.set(0, 0, 0);
              focus_0 = INVALID_POINT;
--- 250,259 ----
  
  
!     if (options == static_cast<Parabola_Set_Option_Struct*>(0))  
         {
  
+             /* Use defaults.  Not programmed yet.
+                LDF 2005.11.07.  */
+ 
              vertex_0.set(0, 0, 0);
              focus_0 = INVALID_POINT;
***************
*** 262,272 ****
  
  
! @q **** (4) |options != 0|.@> 
! @ |options != 0|.  
  \initials{LDF 2005.11.07.}
  
  @<Define |Parabola| functions@>= 
  
!     else   /* |options != 0|  */
         {
           
--- 264,274 ----
  
  
! @q **** (4) |options != static_cast<Parabola_Set_Option_Struct*>(0)|.@> 
! @ |options != static_cast<Parabola_Set_Option_Struct*>(0)|.  
  \initials{LDF 2005.11.07.}
  
  @<Define |Parabola| functions@>= 
  
!     else   /* |options != static_cast<Parabola_Set_Option_Struct*>(0)|  */
         {
           
***************
*** 338,342 ****
  
  
!        }  /* |else| (|options != 0|)  */
  
  @q **** (4) Check |focus_0| and |vertex_0| for consistency.@> 
--- 340,344 ----
  
  
!        }  /* |else| (|options != static_cast<Parabola_Set_Option_Struct*>(0)|)  */
  
  @q **** (4) Check |focus_0| and |vertex_0| for consistency.@> 
***************
*** 723,727 ****
         {
  
!            if (t != 0)
                t->reset();
         }
--- 725,729 ----
         {
  
!            if (t != static_cast<Transform*>(0))
                t->reset();
         }
***************
*** 743,747 ****
  @<Define |Parabola| functions@>=
  
!            if (u == 0)
                { 
                    cerr_strm << thread_name 
--- 745,749 ----
  @<Define |Parabola| functions@>=
  
!            if (u == static_cast<Transform*>(0))
                { 
                    cerr_strm << thread_name 
***************
*** 764,768 ****
                    return INVALID_REAL_TRIPLE;
                             
!               }  /* |if (u == 0)|  */
  
  @q ***** (5)@> 
--- 766,770 ----
                    return INVALID_REAL_TRIPLE;
                             
!               }  /* |if (u == static_cast<Transform*>(0))|  */
  
  @q ***** (5)@> 
***************
*** 770,779 ****
             pth *= *u;
  
!            if (t != 0)
                *t = u->inverse();
  
          
             delete u;
!            u = 0;   
  
         }  /* |else| (|normal != y_axis_pt|)  */ 
--- 772,781 ----
             pth *= *u;
  
!            if (t != static_cast<Transform*>(0))
                *t = u->inverse();
  
          
             delete u;
!            u = static_cast<Transform*>(0);   
  
         }  /* |else| (|normal != y_axis_pt|)  */ 
***************
*** 915,919 ****
  @<Define |Parabola| functions@>=
  
!     if (t == 0)
         {
             cerr_strm << thread_name 
--- 917,921 ----
  @<Define |Parabola| functions@>=
  
!     if (t == static_cast<Transform*>(0))
         {
             cerr_strm << thread_name 
***************
*** 931,935 ****
             return -5;
                             
!        }  /* |if (t == 0)|  */
  
  @q **** (4)@> 
--- 933,937 ----
             return -5;
                             
!        }  /* |if (t == static_cast<Transform*>(0))|  */
  
  @q **** (4)@> 
***************
*** 1586,1590 ****
  @q **** (4).@>
  
!     if (p == 0)
         {
             cerr_strm << thread_name 
--- 1588,1592 ----
  @q **** (4).@>
  
!     if (p == static_cast<Path*>(0))
         {
             cerr_strm << thread_name 
***************
*** 1598,1602 ****
  
             return 0;
!        }  /* |if (p == 0)|  */
  
  @q **** (4)@> 
--- 1600,1604 ----
  
             return 0;
!        }  /* |if (p == static_cast<Path*>(0))|  */
  
  @q **** (4)@> 
***************
*** 1725,1729 ****
  @<Define |Parabola| functions@>=
  
!            if (slope == 0)
                {
                     Point temp_pt = p->get_point(0);
--- 1727,1731 ----
  @<Define |Parabola| functions@>=
  
!            if (slope == ZERO_REAL)
                {
                     Point temp_pt = p->get_point(0);
***************
*** 1741,1745 ****
                     *bpv += curr_bool_pt;
  
!               }  /* |if (slope == 0)|  */
  
  @q ****** (6)@> 
--- 1743,1747 ----
                     *bpv += curr_bool_pt;
  
!               }  /* |if (slope == ZERO_REAL)|  */
  
  @q ****** (6)@> 
***************
*** 1751,1755 ****
  @<Define |Parabola| functions@>=
  
!            else  /* |slope != 0|  */
                {
  
--- 1753,1757 ----
  @<Define |Parabola| functions@>=
  
!            else  /* |slope != ZERO_REAL|  */
                {
  
***************
*** 1798,1802 ****
  @q ******* (7)@> 
  
!               }  /* |else| (|slope != 0|)  */  
  
  @q ****** (6)@>                 
--- 1800,1804 ----
  @q ******* (7)@> 
  
!               }  /* |else| (|slope != ZERO_REAL|)  */  
  
  @q ****** (6)@>                 
***************
*** 1805,1809 ****
  
             delete t;
!            t = 0;
  
             return bpv;
--- 1807,1811 ----
  
             delete t;
!            t = static_cast<Transform*>(0);
  
             return bpv;
diff -rc2P 3DLDF-2.0.2/src/parabold.web 3DLDF-2.0.3/src/parabold.web
*** 3DLDF-2.0.2/src/parabold.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/parabold.web	Wed Dec 11 18:42:22 2013
***************
*** 584,588 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 584,588 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
diff -rc2P 3DLDF-2.0.2/src/paraellp.web 3DLDF-2.0.3/src/paraellp.web
*** 3DLDF-2.0.2/src/paraellp.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/paraellp.web	Wed Dec 11 18:42:22 2013
***************
*** 477,481 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 477,481 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
diff -rc2P 3DLDF-2.0.2/src/parahypr.web 3DLDF-2.0.3/src/parahypr.web
*** 3DLDF-2.0.2/src/parahypr.web	Wed Nov  6 20:56:25 2013
--- 3DLDF-2.0.3/src/parahypr.web	Wed Dec 11 18:42:22 2013
***************
*** 477,481 ****
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = true; /* |false|  */
  
    using namespace Scan_Parse;
--- 477,481 ----
  @q ***** (5) Preliminaries.@> 
  
!   bool DEBUG = false; /* |true|  */
  
    using namespace Scan_Parse;
diff -rc2P 3DLDF-2.0.2/src/passign.w 3DLDF-2.0.3/src/passign.w
*** 3DLDF-2.0.2/src/passign.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/passign.w	Thu Dec 12 21:00:24 2013
***************
*** 706,721 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ***** (5) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.08.30.}
  
--- 706,721 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ***** (5) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.08.30.}
  
***************
*** 723,727 ****
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 723,727 ----
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 745,749 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 745,749 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 760,769 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 760,769 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 832,843 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
!   else /* |entry != 0|  */
      {
  
--- 832,843 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 851,855 ****
              delete pv;
  
!             @=$$@> = 0;
  
      }  /* |else|  */
--- 851,855 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
      }  /* |else|  */
***************
*** 1905,1909 ****
      Pointer_Vector<real>* pv = static_cast<Pointer_Vector<real>*>(@=$3@>);
  
!     if (pv == 0 || pv->ctr <= 0)
         {
             r = INVALID_REAL;
--- 1905,1909 ----
      Pointer_Vector<real>* pv = static_cast<Pointer_Vector<real>*>(@=$3@>);
  
!     if (pv == static_cast<Pointer_Vector<real>*>(0)  || pv->ctr <= 0)
         {
             r = INVALID_REAL;
***************
*** 2261,2286 ****
  
  
! @q ****** (6) Error handling:  |entry == 0|.@> 
  
! @ Error handling:  |entry == 0|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
!           @=$$@> = 0;
          
!       }  /* |if (entry == 0)| */        
  
! @q ****** (6) |entry != 0|.@> 
  
! @ |entry != 0|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
   
!    else  /* |entry != 0|  */
        {
                 
--- 2261,2286 ----
  
  
! @q ****** (6) Error handling:  |entry == static_cast<Id_Map_Entry_Node>(0)|.@> 
  
! @ Error handling:  |entry == static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
!           @=$$@> = static_cast<void*>(0);
          
!       }  /* |if (entry == static_cast<Id_Map_Entry_Node>(0))| */        
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@> 
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
   
!    else  /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
        {
                 
***************
*** 2288,2292 ****
   
     
! @q ******* (7) Error handling:  |entry_0 == 0 || entry_0->object == 0|.@> 
  @ Error handling:  |entry_0 == 0 || entry_0->object == 0|.
  \initials{LDF 2004.12.30.}
--- 2288,2293 ----
   
     
! @q ******* (7) Error handling:                                                         @>
! @q ******* (7) |entry_0 == static_cast<Id_Map_Entry_Node>(0) || entry_0->object == 0|. @>
  @ Error handling:  |entry_0 == 0 || entry_0->object == 0|.
  \initials{LDF 2004.12.30.}
***************
*** 2294,2303 ****
  @<Define rules@>=
  
!          if (entry_0 == 0 || entry_0->object == 0)
              {
  
!                 @=$$@> = 0;
  
!             }  /* |if (entry_0 == 0 || entry_0->object == 0)|  */
  
  
--- 2295,2305 ----
  @<Define rules@>=
  
!          if (   entry_0 == static_cast<Id_Map_Entry_Node>(0) 
!              || entry_0->object == static_cast<Id_Map_Entry_Node>(0))
              {
  
!                 @=$$@> = static_cast<void*>(0);
  
!             }  /* |if| */
  
  
***************
*** 2321,2325 ****
  @<Define rules@>=
  
!             if (entry->object == 0)
                 {
  
--- 2323,2327 ----
  @<Define rules@>=
  
!             if (entry->object == static_cast<Id_Map_Entry_Node>(0))
                 {
  
***************
*** 2329,2347 ****
                    entry->object = static_cast<void*>(d); 
  
!                }  /* |if (entry->object == 0)|  */
  
  
! @q ******** (8) |entry->object != 0|.@> 
  
! @ |entry->object == 0|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
  
!             else  /* |entry->object != 0|  */
                 {
                     d = static_cast<Definition_Info_Node>(entry->object);
  
!                }  /* |else| (|entry->object != 0|)  */
  
  @q ******** (8) @> 
--- 2331,2349 ----
                    entry->object = static_cast<void*>(d); 
  
!                }  /* |if (entry->object == static_cast<Id_Map_Entry_Node>(0))|  */
  
  
! @q ******** (8) |entry->object != static_cast<void*>(0)|.@> 
  
! @ |entry->object == static_cast<void*>(0)|.
  \initials{LDF 2004.12.30.}
  
  @<Define rules@>=
  
!             else  /* |entry->object != static_cast<void*>(0)|  */
                 {
                     d = static_cast<Definition_Info_Node>(entry->object);
  
!                }  /* |else| (|entry->object != static_cast<void*>(0)|)  */
  
  @q ******** (8) @> 
***************
*** 2580,2594 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == 0)|  */
  
  
  
  
! @q ******* (7) |entry != 0|.@>   
  
  @ |entry != 0|.
--- 2582,2596 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
  
  
  
! @q ******* (7) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
  @ |entry != 0|.
***************
*** 2612,2616 ****
  @<Define rules@>=
  
!   if (bp == 0)
      {
        
--- 2614,2618 ----
  @<Define rules@>=
  
!   if (bp == static_cast<Bool_Point*>(0))
      {
        
***************
*** 2620,2633 ****
   
  
!     } /* |if (bp == 0)|  */
  
! @q ******** (8) |bp != 0|.@> 
  
! @ |bp != 0|.
  \initials{LDF 2004.11.03.}
  
  @<Define rules@>=
  
!    else  /* |bp != 0|  */
       {
          bp->b  = bpe->b,
--- 2622,2635 ----
   
  
!     } /* |if (bp == static_cast<Bool_Point*>(0))|  */
  
! @q ******** (8) |bp != static_cast<Bool_Point*>(0)|.@> 
  
! @ |bp != static_cast<Bool_Point*>(0)|.
  \initials{LDF 2004.11.03.}
  
  @<Define rules@>=
  
!    else  /* |bp != static_cast<Bool_Point*>(0)|  */
       {
          bp->b  = bpe->b,
***************
*** 2638,2644 ****
          @=$$@> = entry->object;
  
!      }   /* |else| (|bp != 0|)  */
  
!    } /* |else| (|entry != 0|)  */
  
  };
--- 2640,2646 ----
          @=$$@> = entry->object;
  
!      }   /* |else| (|bp != static_cast<Bool_Point*>(0)|)  */
  
!    } /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  };
***************
*** 2676,2685 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete b;
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0)|  */
--- 2678,2687 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete b;
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0)|  */
***************
*** 2708,2712 ****
  @<Define rules@>=
  
!   if (bp == 0)
      {
        
--- 2710,2714 ----
  @<Define rules@>=
  
!   if (bp == static_cast<Bool_Point*>(0))
      {
        
***************
*** 2766,2770 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 2768,2772 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 2772,2776 ****
        delete p;
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0)|  */
--- 2774,2778 ----
        delete p;
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0)|  */
***************
*** 2798,2802 ****
  @<Define rules@>=
  
!   if (bp == 0)
      {
        
--- 2800,2804 ----
  @<Define rules@>=
  
!   if (bp == static_cast<Bool_Point*>(0))
      {
        
***************
*** 3998,4005 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4000,4007 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4045,4049 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4047,4051 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4107,4114 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4109,4116 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4154,4158 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4156,4160 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4216,4223 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4218,4225 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4263,4267 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4265,4269 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4334,4341 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4336,4343 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4380,4384 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4382,4386 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4452,4470 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 4454,4472 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 4498,4502 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4500,4504 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4518,4522 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 4520,4524 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 4562,4587 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 4564,4589 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 4617,4621 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4619,4623 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4637,4641 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 4639,4643 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 4685,4710 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.07.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.07.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 4687,4712 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.07.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.07.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 4738,4742 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4740,4744 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4758,4762 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 4760,4764 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 4802,4827 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 4804,4829 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 4855,4859 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4857,4861 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4875,4879 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 4877,4881 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 4919,4944 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.18.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.18.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 4921,4946 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.18.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.18.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 4972,4976 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4974,4978 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4992,4996 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 4994,4998 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5056,5081 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.11.06.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.09.01.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5058,5083 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.11.06.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.09.01.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5109,5113 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5111,5115 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5129,5133 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5131,5135 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5164,5184 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.11.10.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.11.10.}
  
--- 5166,5186 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.11.10.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.11.10.}
  
***************
*** 5186,5190 ****
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5188,5192 ----
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5219,5223 ****
              delete bpv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5221,5225 ----
              delete bpv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5239,5243 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5241,5245 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5296,5316 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.11.06.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.09.01.}
  
--- 5298,5318 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.11.06.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.09.01.}
  
***************
*** 5333,5337 ****
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5335,5339 ----
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5366,5370 ****
              bpv = 0;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5368,5372 ----
              bpv = 0;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5386,5390 ****
        }  /* |else| (|status == 0|)  */
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5388,5392 ----
        }  /* |else| (|status == 0|)  */
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5422,5442 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.11.10.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.11.10.}
  
--- 5424,5444 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.11.10.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.11.10.}
  
***************
*** 5444,5448 ****
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5446,5450 ----
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5476,5480 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5478,5482 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5496,5500 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5498,5502 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5539,5564 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.10.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.10.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5541,5566 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.10.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.10.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5591,5595 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5593,5597 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5611,5615 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5613,5617 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5653,5678 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5655,5680 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5705,5709 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5707,5711 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5725,5729 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5727,5731 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5767,5792 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5769,5794 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5819,5823 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5821,5825 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5839,5843 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5841,5845 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 5885,5910 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.11.07.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.11.07.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 5887,5912 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.11.07.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.11.07.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 5939,5943 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5941,5945 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5959,5963 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 5961,5965 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6004,6029 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6006,6031 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6058,6062 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6060,6064 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6078,6082 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6080,6084 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6123,6148 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6125,6150 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2007.10.13.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6177,6181 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6179,6183 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6197,6201 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6199,6203 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6242,6267 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6244,6269 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.11.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6297,6301 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6299,6303 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6317,6321 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6319,6323 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6363,6388 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.05.20.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.05.20.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6365,6390 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.05.20.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.05.20.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6415,6419 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6417,6421 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6435,6439 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6437,6441 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6479,6504 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.25.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.25.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6481,6506 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.25.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.25.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6531,6535 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6533,6537 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6551,6555 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6553,6557 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6595,6620 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.26.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.26.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6597,6622 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.26.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.26.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6646,6650 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6648,6652 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6666,6670 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6668,6672 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6763,6767 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6765,6769 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6823,6848 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6825,6850 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6874,6878 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6876,6880 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6894,6898 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 6896,6900 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 6939,6964 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 6941,6966 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 6992,6996 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6994,6998 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7012,7016 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7014,7018 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7054,7079 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7056,7081 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2004.12.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7107,7111 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7109,7113 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7127,7131 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7129,7133 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7169,7194 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.01.14.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.01.14.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7171,7196 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.01.14.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.01.14.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7222,7226 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7224,7228 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7242,7246 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7244,7248 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7284,7309 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7286,7311 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7336,7340 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7338,7342 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7356,7360 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7358,7362 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7398,7423 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7400,7425 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7450,7454 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7452,7456 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7470,7474 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7472,7476 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7512,7537 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7514,7539 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.10.30.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7565,7569 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7567,7571 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7585,7589 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7587,7591 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7628,7653 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == 0|.@>
  
! @ Error handling for the case that |entry == 0 |.
  \initials{LDF 2005.02.03.}
  
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
!       @=$$@> = 0; 
  
!     } /* |if (entry == 0)|  */
  
! @q ****** (6) |entry != 0|.@>   
  
! @ |entry != 0|.
  \initials{LDF 2005.02.03.}
  
  @<Define rules@>=
  
!   else /* |entry != 0|  */
      {
  
--- 7630,7655 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
! @q ****** (6) Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0)|.@>
  
! @ Error handling for the case that |entry == static_cast<Id_Map_Entry_Node>(0) |.
  \initials{LDF 2005.02.03.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
!       @=$$@> = static_cast<void*>(0); 
  
!     } /* |if (entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
! @q ****** (6) |entry != static_cast<Id_Map_Entry_Node>(0)|.@>   
  
! @ |entry != static_cast<Id_Map_Entry_Node>(0)|.
  \initials{LDF 2005.02.03.}
  
  @<Define rules@>=
  
!   else /* |entry != static_cast<Id_Map_Entry_Node>(0)|  */
      {
  
***************
*** 7681,7685 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7683,7687 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7701,7705 ****
  
  
!    }   /* |else| (|entry != 0|)  */
  
  
--- 7703,7707 ----
  
  
!    }   /* |else| (|entry != static_cast<Id_Map_Entry_Node>(0)|)  */
  
  
***************
*** 7763,7767 ****
    delete static_cast<Transform*>(@=$1@>); 
  
!   @=$$@> = 0;
     
  };
--- 7765,7769 ----
    delete static_cast<Transform*>(@=$1@>); 
  
!   @=$$@> = static_cast<void*>(0);
     
  };
diff -rc2P 3DLDF-2.0.2/src/paths.web 3DLDF-2.0.3/src/paths.web
*** 3DLDF-2.0.2/src/paths.web	Sun Nov 10 16:53:36 2013
--- 3DLDF-2.0.3/src/paths.web	Fri Dec 13 11:34:13 2013
***************
*** 357,361 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 357,361 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 410,417 ****
  @q **** (4) @>   
  
!          if (draw_color_vector == 0 && p.draw_color_vector == 0)
              ; /* Do nothing.  */@; 
  
!          else if (draw_color_vector == 0 &&  p.draw_color_vector != 0)
              {
  
--- 410,419 ----
  @q **** (4) @>   
  
!          if (   draw_color_vector == static_cast<Pointer_Vector<Color>*>(0)  
!              && p.draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
              ; /* Do nothing.  */@; 
  
!          else if (   draw_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!                   && p.draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
              {
  
***************
*** 423,427 ****
              }
  
!          else if (draw_color_vector != 0 &&  p.draw_color_vector == 0)
              {
                  draw_color_vector->clear();
--- 425,430 ----
              }
  
!          else if (   draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                   && p.draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
              {
                  draw_color_vector->clear();
***************
*** 431,443 ****
              }
  
!           else if (draw_color_vector != 0 &&  p.draw_color_vector != 0)
               *draw_color_vector = *(p.draw_color_vector);
  
  @q **** (4) @>   
  
!          if (fill_color_vector == 0 && p.fill_color_vector == 0)
              ; /* Do nothing.  */@; 
  
!          else if (fill_color_vector == 0 &&  p.fill_color_vector != 0)
              {
  
--- 434,449 ----
              }
  
!           else if (   draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                    && p.draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
               *draw_color_vector = *(p.draw_color_vector);
  
  @q **** (4) @>   
  
!          if (   fill_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!              && p.fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
              ; /* Do nothing.  */@; 
  
!          else if (    fill_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!                   &&  p.fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
              {
  
***************
*** 449,461 ****
              }
  
!          else if (fill_color_vector != 0 &&  p.fill_color_vector == 0)
              {
                  fill_color_vector->clear();
                  delete fill_color_vector;
!                 fill_color_vector = 0;
  
              }
  
!           else if (fill_color_vector != 0 &&  p.fill_color_vector != 0)
               *fill_color_vector = *(p.fill_color_vector);
  
--- 455,469 ----
              }
  
!          else if (   fill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                   && p.fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
              {
                  fill_color_vector->clear();
                  delete fill_color_vector;
!                 fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
  
              }
  
!           else if (   fill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                    && p.fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
               *fill_color_vector = *(p.fill_color_vector);
  
***************
*** 495,502 ****
  
  
!          if (dash_pattern_vector == 0 && p.dash_pattern_vector == 0)
              ; /* Do nothing.  */@; 
  
!          else if (dash_pattern_vector == 0 &&  p.dash_pattern_vector != 0)
              {
  
--- 503,512 ----
  
  
!          if (   dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!              && p.dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
              ; /* Do nothing.  */@; 
  
!          else if (   dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                   && p.dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
              {
  
***************
*** 508,520 ****
              }
  
!          else if (dash_pattern_vector != 0 &&  p.dash_pattern_vector == 0)
              {
                  dash_pattern_vector->clear();
                  delete dash_pattern_vector;
!                 dash_pattern_vector = 0;
  
              }
  
!           else if (dash_pattern_vector != 0 &&  p.dash_pattern_vector != 0)
               *dash_pattern_vector = *(p.dash_pattern_vector);
  
--- 518,532 ----
              }
  
!          else if (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                   && p.dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
              {
                  dash_pattern_vector->clear();
                  delete dash_pattern_vector;
!                 dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
  
              }
  
!           else if (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                    && p.dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
               *dash_pattern_vector = *(p.dash_pattern_vector);
  
***************
*** 532,539 ****
  
  
!          if (pen_vector == 0 && p.pen_vector == 0)
              ; /* Do nothing.  */@; 
  
!          else if (pen_vector == 0 &&  p.pen_vector != 0)
              {
  
--- 544,553 ----
  
  
!          if (   pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!              && p.pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
              ; /* Do nothing.  */@; 
  
!          else if (   pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!                   && p.pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
              {
  
***************
*** 545,557 ****
              }
  
!          else if (pen_vector != 0 &&  p.pen_vector == 0)
              {
                  pen_vector->clear();
                  delete pen_vector;
!                 pen_vector = 0;
  
              }
  
!           else if (pen_vector != 0 &&  p.pen_vector != 0)
               *pen_vector = *(p.pen_vector);
  
--- 559,573 ----
              }
  
!          else if (   pen_vector != static_cast<Pointer_Vector<Pen>*>(0) 
!                   && p.pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
              {
                  pen_vector->clear();
                  delete pen_vector;
!                 pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
  
              }
  
!           else if (   pen_vector != static_cast<Pointer_Vector<Pen>*>(0) 
!                    && p.pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
               *pen_vector = *(p.pen_vector);
  
***************
*** 582,586 ****
  
    if (world_extremes.size() == 0)
!      world_extremes.resize(6,0);
  
    pre_projective_extremes = p.pre_projective_extremes; 
--- 598,602 ----
  
    if (world_extremes.size() == 0)
!      world_extremes.resize(6, 0);
  
    pre_projective_extremes = p.pre_projective_extremes; 
***************
*** 588,597 ****
  
    if (pre_projective_extremes.size() == 0)  
!     pre_projective_extremes.resize(6,0);
  
    projective_extremes = p.projective_extremes; 
  
    if (projective_extremes.size() == 0)  
!     projective_extremes.resize(6,0);
    
    
--- 604,613 ----
  
    if (pre_projective_extremes.size() == 0)  
!     pre_projective_extremes.resize(6, 0);
  
    projective_extremes = p.projective_extremes; 
  
    if (projective_extremes.size() == 0)  
!     projective_extremes.resize(6, 0);
    
    
***************
*** 718,722 ****
  
     if (DEBUG)
!      cerr << "Entering Path() (default version).\n" << flush;
  
     line_switch = false;
--- 734,738 ----
  
     if (DEBUG)
!      cerr << "Entering Path() (default version).\n";
  
     line_switch = false;
***************
*** 815,819 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (line version).\n" << flush;
  
    line_switch = true;
--- 831,835 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (line version).\n";
  
    line_switch = true;
***************
*** 848,852 ****
    connectors.push_back("--");
    if (DEBUG)
!     cerr << "Exiting Path() (line version).\n" << flush;
    return;
  
--- 864,868 ----
    connectors.push_back("--");
    if (DEBUG)
!     cerr << "Exiting Path() (line version).\n";
    return;
  
***************
*** 914,942 ****
    fill_draw_value = 0;
  
!   if (draw_color_vector != 0)
      {
          delete draw_color_vector;
!         draw_color_vector = 0;
      }
  
  
!   if (fill_color_vector != 0)
      {
          delete fill_color_vector;
!         fill_color_vector = 0;
      }
  
  
  
!   if (dash_pattern_vector != 0)
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = 0;
      }
  
!   if (pen_vector != 0)
      {
          delete pen_vector;
!         pen_vector = 0;
      }
  
--- 930,958 ----
    fill_draw_value = 0;
  
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete draw_color_vector;
!         draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
  
!   if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete fill_color_vector;
!         fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
  
  
!   if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
      }
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
          delete pen_vector;
!         pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
      }
  
***************
*** 1039,1043 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (connector, cycle, ...).\n" << flush;
  
    shape_type = PATH_TYPE;
--- 1055,1059 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (connector, cycle, ...).\n";
  
    shape_type = PATH_TYPE;
***************
*** 1078,1082 ****
    va_end(ap);
    if (DEBUG)
!     cerr << "Exiting Path() (connector, cycle, ...).\n" << flush;
    return;
  }
--- 1094,1098 ----
    va_end(ap);
    if (DEBUG)
!     cerr << "Exiting Path() (connector, cycle, ...).\n";
    return;
  }
***************
*** 1140,1143 ****
--- 1156,1170 ----
      volatile bool DEBUG = false;  /* |true|  */
  
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock();
+         cerr << "Entering `Path::set'."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
      line_switch = false;
      cycle_switch = cycle;
***************
*** 1150,1176 ****
  
  
!   if (draw_color_vector != 0)
      {
          delete draw_color_vector;
!         draw_color_vector = 0;
      }
  
!   if (fill_color_vector != 0)
      {
          delete fill_color_vector;
!         fill_color_vector = 0;
      }
  
  
!   if (dash_pattern_vector != 0)
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = 0;
      }
  
!   if (pen_vector != 0)
      {
          delete pen_vector;
!         pen_vector = 0;
      }
  
--- 1177,1203 ----
  
  
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete draw_color_vector;
!         draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
!   if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete fill_color_vector;
!         fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
  
!   if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
      }
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
          delete pen_vector;
!         pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
      }
  
***************
*** 1193,1197 ****
          points.push_back(create_new<Point>(arg_ptr)); 
      }
!     
      va_end(ap);
  
--- 1220,1224 ----
          points.push_back(create_new<Point>(arg_ptr)); 
      }
! 
      va_end(ap);
  
***************
*** 1235,1239 ****
  @^\cfunc{Path}{Path}@>
  
- 
  \LOG
  \initials{LDF 2004.06.07.}  
--- 1262,1265 ----
***************
*** 1272,1276 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (Point* ...).\n" << flush;
  
    shape_type = PATH_TYPE;
--- 1298,1302 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path() (Point* ...).\n";
  
    shape_type = PATH_TYPE;
***************
*** 1324,1328 ****
    va_end(ap);
    if (DEBUG)
!     cerr << "Exiting Path() (Point* ...).\n" << flush;
  }
  
--- 1350,1354 ----
    va_end(ap);
    if (DEBUG)
!     cerr << "Exiting Path() (Point* ...).\n";
  }
  
***************
*** 1398,1424 ****
      fill_draw_value = 0;
  
!   if (draw_color_vector != 0)
      {
          delete draw_color_vector;
!         draw_color_vector = 0;
      }
  
  
!   if (fill_color_vector != 0)
      {
          delete fill_color_vector;
!         fill_color_vector = 0;
      }
  
!   if (dash_pattern_vector != 0)
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = 0;
      }
  
!   if (pen_vector != 0)
      {
          delete pen_vector;
!         pen_vector = 0;
      }
  
--- 1424,1450 ----
      fill_draw_value = 0;
  
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete draw_color_vector;
!         draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
  
!   if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete fill_color_vector;
!         fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
!   if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
      }
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
          delete pen_vector;
!         pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
      }
  
***************
*** 1521,1525 ****
  
    if (DEBUG)
!     cerr << "Exiting Path() (copy constructor).\n" << flush;
    return;
  }
--- 1547,1551 ----
  
    if (DEBUG)
!     cerr << "Exiting Path() (copy constructor).\n";
    return;
  }
***************
*** 1632,1636 ****
     if (DEBUG)
       {
!        cerr << "Entering ~Path().\n" << flush;
         show("Path:");
       }
--- 1658,1662 ----
     if (DEBUG)
       {
!        cerr << "Entering ~Path().\n";
         show("Path:");
       }
***************
*** 1666,1673 ****
  @<Define |Path| functions@>=
  
!    if (draw_color_vector != 0)
        {
            delete draw_color_vector;
!           draw_color_vector = 0;
          
        }  /* |if (draw_color_vector != 0)|  */
--- 1692,1699 ----
  @<Define |Path| functions@>=
  
!    if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
            delete draw_color_vector;
!           draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
          
        }  /* |if (draw_color_vector != 0)|  */
***************
*** 1677,1693 ****
      {
          delete fill_color_vector;
!         fill_color_vector = 0;
      }
  
!   if (dash_pattern_vector != 0)
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = 0;
      }
  
!   if (pen_vector != 0)
      {
          delete pen_vector;
!         pen_vector = 0;
      }
  
--- 1703,1719 ----
      {
          delete fill_color_vector;
!         fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
      }
  
!   if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
          delete dash_pattern_vector;
!         dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
      }
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
          delete pen_vector;
!         pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
      }
  
***************
*** 1696,1700 ****
      if (DEBUG)
        {
!           cerr << "Exiting ~Path().\n" << flush;
        }
  }
--- 1722,1726 ----
      if (DEBUG)
        {
!           cerr << "Exiting ~Path().\n";
        }
  }
***************
*** 1766,1770 ****
    @<Discard |points| and |connectors|@>@;
    
!   if (draw_color_vector != 0)
      {
          delete draw_color_vector;
--- 1792,1796 ----
    @<Discard |points| and |connectors|@>@;
    
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete draw_color_vector;
***************
*** 1772,1776 ****
      }
  
!   if (fill_color_vector != 0)
      {
          delete fill_color_vector;
--- 1798,1802 ----
      }
  
!   if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      {
          delete fill_color_vector;
***************
*** 1779,1783 ****
  
  
!   if (dash_pattern_vector != 0)
      {
          delete dash_pattern_vector;
--- 1805,1809 ----
  
  
!   if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
          delete dash_pattern_vector;
***************
*** 1785,1789 ****
      }
  
!   if (pen_vector != 0)
      {
          delete pen_vector;
--- 1811,1815 ----
      }
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
          delete pen_vector;
***************
*** 2032,2036 ****
  Path::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
--- 2058,2062 ----
  Path::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2082,2086 ****
  Path::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 2108,2112 ----
  Path::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2132,2139 ****
  Path::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 2158,2165 ----
  Path::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2182,2186 ****
  Path::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == 0)
        pen_vector = new Pointer_Vector<Pen>;
  
--- 2208,2212 ----
  Path::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        pen_vector = new Pointer_Vector<Pen>;
  
***************
*** 2226,2230 ****
  Path::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == 0)
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
--- 2252,2256 ----
  Path::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
***************
*** 3395,3399 ****
            cerr << "ERROR! In Path::project():\n"
                 << "Point::project() returned false.\n"
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 3421,3425 ----
            cerr << "ERROR! In Path::project():\n"
                 << "Point::project() returned false.\n"
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 3481,3485 ****
  
  
!    if (path_reflection == 0)
       {
          cerr_strm << thread_name 
--- 3507,3511 ----
  
  
!    if (path_reflection == static_cast<Path*>(0))
       {
          cerr_strm << thread_name 
***************
*** 3780,3784 ****
  @<Define |Path| functions@>=
    
!   if (path_ptr_vector == 0)
       {
  
--- 3806,3810 ----
  @<Define |Path| functions@>=
    
!   if (path_ptr_vector == static_cast<Pointer_Vector<Path>*>(0))
       {
  
***************
*** 4149,4153 ****
             << "Don't call this function with the \"assign\" "
             << "argument == false.\nIt won't cause any harm, though.\n"
!            << "Continuing.\n\n" << flush;
        return t;
      }
--- 4175,4179 ----
             << "Don't call this function with the \"assign\" "
             << "argument == false.\nIt won't cause any harm, though.\n"
!            << "Continuing.\n\n";
        return t;
      }
***************
*** 4341,4345 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 4367,4371 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 4359,4363 ****
  @<Define |Path| functions@>=
  
!    if (c == 0)
        {
            cerr_strm << thread_name << "WARNING!  In `Path::operator+=(Color*)':"
--- 4385,4389 ----
  @<Define |Path| functions@>=
  
!    if (c == static_cast<Color*>(0))
        {
            cerr_strm << thread_name << "WARNING!  In `Path::operator+=(Color*)':"
***************
*** 4379,4383 ****
  @q *** (3).@> 
  
!    if (draw_color_vector == 0)
        {
   
--- 4405,4409 ----
  @q *** (3).@> 
  
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        {
   
***************
*** 4406,4410 ****
  
  
!       }  /* |if (draw_color_vector == 0)|  */
  
  @q *** (3).@> 
--- 4432,4436 ----
  
  
!       }  /* |if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))|  */
  
  @q *** (3).@> 
***************
*** 4493,4498 ****
        cerr << "ERROR! In Path::operator&(Path&)."
          << "Paths don't touch.\n"
!           << "Using \"..\" to join them instead of \"&\".\n"
!             << flush;
        connectors.push_back("..");
      }
--- 4519,4524 ----
        cerr << "ERROR! In Path::operator&(Path&)."
          << "Paths don't touch.\n"
!           << "Using \"..\" to join them instead of \"&\".\n";
! 
        connectors.push_back("..");
      }
***************
*** 4966,4970 ****
  
  
!           if (ppen_vector != 0)
               {
                   p->pen_vector = new Pointer_Vector<Pen>;
--- 4992,4996 ----
  
  
!           if (ppen_vector != static_cast<Pointer_Vector<Pen>*>(0))
               {
                   p->pen_vector = new Pointer_Vector<Pen>;
***************
*** 4976,4980 ****
  
  
!           if (ddash_pattern_vector != 0)
               {
                   p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 5002,5006 ----
  
  
!           if (ddash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
               {
                   p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 5247,5251 ****
     Pointer_Vector<Pen>* ppen_vector = 0; 
  
!    if (ppen != 0)
        {
           ppen_vector = new Pointer_Vector<Pen>;
--- 5273,5277 ----
     Pointer_Vector<Pen>* ppen_vector = 0; 
  
!    if (ppen != static_cast<Pen*>(0))
        {
           ppen_vector = new Pointer_Vector<Pen>;
***************
*** 5255,5259 ****
     Pointer_Vector<Dash_Pattern>* ddash_pattern_vector = 0;
  
!    if (ddash_pattern != 0)
        {
           ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 5281,5285 ----
     Pointer_Vector<Dash_Pattern>* ddash_pattern_vector = 0;
  
!    if (ddash_pattern != static_cast<Dash_Pattern*>(0))
        {
           ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 5526,5530 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG) 
!     cerr << "Entering Path::fill().\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
    
--- 5552,5556 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG) 
!     cerr << "Entering Path::fill().\n";
  #endif /* |DEBUG_COMPILE|  */@; 
    
***************
*** 5534,5538 ****
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n" << flush;
        return 1;
      }
--- 5560,5564 ----
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n";
        return 1;
      }
***************
*** 5565,5569 ****
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 5591,5595 ----
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 5573,5577 ****
        
        cerr << "`Picture::lock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 5599,5603 ----
        
        cerr << "`Picture::lock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 5604,5608 ****
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 5630,5634 ----
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 5612,5616 ****
        
        cerr << "`Picture::unlock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 5638,5642 ----
        
        cerr << "`Picture::unlock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 5627,5631 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "Exiting Path::fill().\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 5653,5657 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "Exiting Path::fill().\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 5754,5758 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path::filldraw().\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 5780,5784 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path::filldraw().\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 5762,5766 ****
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n" << flush;
        return 1;
      }
--- 5788,5792 ----
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n";
        return 1;
      }
***************
*** 5780,5784 ****
       p->push_fill_color(ffill_color, false);
  
!   if (ppen_vector != 0)
      {
        p->pen_vector = new Pointer_Vector<Pen>;
--- 5806,5810 ----
       p->push_fill_color(ffill_color, false);
  
!   if (ppen_vector != static_cast<Pointer_Vector<Pen>*>(0))
      {
        p->pen_vector = new Pointer_Vector<Pen>;
***************
*** 5789,5793 ****
  
  
!   if (ddash_pattern_vector != 0)
      {
        p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 5815,5819 ----
  
  
!   if (ddash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
      {
        p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 5814,5818 ****
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 5840,5844 ----
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 5822,5826 ****
        
        cerr << "`Picture::lock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 5848,5852 ----
        
        cerr << "`Picture::lock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 5855,5859 ****
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 5881,5885 ----
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 5863,5867 ****
        
        cerr << "`Picture::unlock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 5889,5893 ----
        
        cerr << "`Picture::unlock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 5878,5882 ****
  
    if (DEBUG)
!     cerr << "Exiting Path::filldraw().\n" << flush;
  
  #endif /* |DEBUG_COMPILE|  */@; 
--- 5904,5908 ----
  
    if (DEBUG)
!     cerr << "Exiting Path::filldraw().\n";
  
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 5957,5961 ****
             << "Path doesn't contain any Points.\n"
             << "Not adding `Path' to `Picture', returning 1, "
!            << "and will try to continue.\n\n" << flush;
        return 1;
      }
--- 5983,5987 ----
             << "Path doesn't contain any Points.\n"
             << "Not adding `Path' to `Picture', returning 1, "
!            << "and will try to continue.\n\n";
        return 1;
      }
***************
*** 5968,5972 ****
      p->fill_color_vector = 0;
  
!     if (ppen_vector != 0)
         { 
             p->pen_vector = new Pointer_Vector<Pen>;
--- 5994,5998 ----
      p->fill_color_vector = 0;
  
!     if (ppen_vector != static_cast<Pointer_Vector<Pen>*>(0))
         { 
             p->pen_vector = new Pointer_Vector<Pen>;
***************
*** 5976,5980 ****
         p->pen_vector = 0;
  
!     if (ddash_pattern_vector != 0)
         { 
             p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 6002,6006 ----
         p->pen_vector = 0;
  
!     if (ddash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
         { 
             p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 6002,6006 ****
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6028,6032 ----
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6010,6014 ****
        
        cerr << "`Picture::lock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6036,6040 ----
        
        cerr << "`Picture::lock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6042,6046 ****
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6068,6072 ----
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6050,6054 ****
        
        cerr << "`Picture::unlock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6076,6080 ----
        
        cerr << "`Picture::unlock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6121,6125 ****
    Pointer_Vector<Pen>* ppen_vector = 0;
  
!   if (ppen != 0)
       {
          ppen_vector = new Pointer_Vector<Pen>;
--- 6147,6151 ----
    Pointer_Vector<Pen>* ppen_vector = 0;
  
!   if (ppen != static_cast<Pen*>(0))
       {
          ppen_vector = new Pointer_Vector<Pen>;
***************
*** 6130,6134 ****
    Pointer_Vector<Dash_Pattern>* ddash_pattern_vector = 0;
  
!   if (ddash_pattern != 0)
       {
          ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 6156,6160 ----
    Pointer_Vector<Dash_Pattern>* ddash_pattern_vector = 0;
  
!   if (ddash_pattern != static_cast<Dash_Pattern*>(0))
       {
          ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 6196,6200 ****
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n" << flush;
        return 1;
      }
--- 6222,6226 ----
          << "Path doesn't contain any Points.\n"
          << "Not adding `Path' to `Picture', returning 1, "
!         << "and will try to continue.\n\n";
        return 1;
      }
***************
*** 6226,6230 ****
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6252,6256 ----
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6234,6238 ****
        
        cerr << "`Picture::lock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6260,6264 ----
        
        cerr << "`Picture::lock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6265,6269 ****
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6291,6295 ----
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6273,6277 ****
        
        cerr << "`Picture::unlock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6299,6303 ----
        
        cerr << "`Picture::unlock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6381,6385 ****
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path::unfilldraw().\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6407,6411 ----
    bool DEBUG = false; /* |true|  */ 
    if (DEBUG)
!     cerr << "Entering Path::unfilldraw().\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6389,6393 ****
             << "Path doesn't contain any Points.\n"
             << "Not adding `Path' to `Picture', returning 1, "
!            << "and will try to continue.\n\n" << flush;
        return 1;
      }
--- 6415,6419 ----
             << "Path doesn't contain any Points.\n"
             << "Not adding `Path' to `Picture', returning 1, "
!            << "and will try to continue.\n\n";
        return 1;
      }
***************
*** 6405,6409 ****
    p->fill_color_vector = 0;
  
!   if (ppen_vector != 0)
       {
           p->pen_vector = new Pointer_Vector<Pen>;
--- 6431,6435 ----
    p->fill_color_vector = 0;
  
!   if (ppen_vector != static_cast<Pointer_Vector<Pen>*>(0))
       {
           p->pen_vector = new Pointer_Vector<Pen>;
***************
*** 6414,6418 ****
  
  
!   if (ddash_pattern_vector != 0)
       {
           p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 6440,6444 ----
  
  
!   if (ddash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
       {
           p->dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 6441,6445 ****
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6467,6471 ----
               << "`Picture::lock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6449,6453 ****
        
        cerr << "`Picture::lock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6475,6479 ----
        
        cerr << "`Picture::lock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6480,6484 ****
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6506,6510 ----
               << "`Picture::unlock' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6488,6492 ****
        
        cerr << "`Picture::unlock' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6514,6518 ----
        
        cerr << "`Picture::unlock' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6503,6507 ****
  #if DEBUG_COMPILE
    if (DEBUG) 
!     cerr << "Exiting Path::unfilldraw().\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@;   
  
--- 6529,6533 ----
  #if DEBUG_COMPILE
    if (DEBUG) 
!     cerr << "Exiting Path::unfilldraw().\n";
  #endif /* |DEBUG_COMPILE|  */@;   
  
***************
*** 7746,7756 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_minimum_x()" << endl << flush;
  
    if (DEBUG)
!     cerr << "minimum_x == " << projective_extremes[0] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_minimum_x()" << endl << flush;
  
    return projective_extremes[0];
--- 7772,7782 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_minimum_x()" << endl;
  
    if (DEBUG)
!     cerr << "minimum_x == " << projective_extremes[0] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_minimum_x()" << endl;
  
    return projective_extremes[0];
***************
*** 7789,7799 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_maximum_x()" << endl << flush;
  
    if (DEBUG)
!     cerr << "maximum_x == " << projective_extremes[1] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_maximum_x()" << endl << flush;
  
    return projective_extremes[1];
--- 7815,7825 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_maximum_x()" << endl;
  
    if (DEBUG)
!     cerr << "maximum_x == " << projective_extremes[1] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_maximum_x()" << endl;
  
    return projective_extremes[1];
***************
*** 7863,7873 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_minimum_y()" << endl << flush;
  
    if (DEBUG)
!     cerr << "minimum_y == " << projective_extremes[2] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_minimum_y()" << endl << flush;
  
    return projective_extremes[2];
--- 7889,7899 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_minimum_y()" << endl;
  
    if (DEBUG)
!     cerr << "minimum_y == " << projective_extremes[2] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_minimum_y()" << endl;
  
    return projective_extremes[2];
***************
*** 7906,7916 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_maximum_y()" << endl << flush;
  
    if (DEBUG)
!     cerr << "maximum_y == " << projective_extremes[3] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_maximum_y()" << endl << flush;
  
    return projective_extremes[3];
--- 7932,7942 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Path::get_maximum_y()" << endl;
  
    if (DEBUG)
!     cerr << "maximum_y == " << projective_extremes[3] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Path::get_maximum_y()" << endl;
  
    return projective_extremes[3];
***************
*** 8005,8009 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 8031,8035 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 8120,8124 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 8146,8150 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 8237,8241 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 8263,8267 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 8588,8592 ****
            @<Output |Path|@>@;
  
!           if (fill_color_vector != 0 && fill_color_vector->ctr > 0)
              *out_stream << " withcolor " << *(fill_color_vector->v[0]);
  
--- 8614,8619 ----
            @<Output |Path|@>@;
  
!           if (   fill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!               && fill_color_vector->ctr > 0)
              *out_stream << " withcolor " << *(fill_color_vector->v[0]);
  
***************
*** 8644,8660 ****
                Color* temp_color;
  
!               if (fill_color_vector != 0 && fill_color_vector->ctr > 0)
                  temp_color = fill_color_vector->v[0];
!               else temp_color = 0;
              
!               if (temp_color == 0)
                    {
                        entry = scanner_node->lookup("background_color");
                
!                       if (entry != 0)
                           v = entry->get_object();         
  
!                       if (entry != 0 && v != 0)
                           temp_color = static_cast<Color*>(v);
                        else 
                           temp_color = const_cast<Color*>(&Colors::white);
--- 8671,8694 ----
                Color* temp_color;
  
!               if (   fill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                   && fill_color_vector->ctr > 0)
!               {
                  temp_color = fill_color_vector->v[0];
!               }
!               else 
!                  temp_color = 0;
              
!               if (temp_color == static_cast<Color*>(0))
                    {
                        entry = scanner_node->lookup("background_color");
                
!                       if (entry != static_cast<Id_Map_Entry_Node>(0))
                           v = entry->get_object();         
  
!                       if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                           && v != static_cast<void*>(0))
!                       {
                           temp_color = static_cast<Color*>(v);
+                       }
                        else 
                           temp_color = const_cast<Color*>(&Colors::white);
***************
*** 8801,8805 ****
  @q ***** (5).@> 
  
!           if (   draw_color_vector == 0 
                || draw_color_vector->v.size() == 0)
              {
--- 8835,8839 ----
  @q ***** (5).@> 
  
!           if (   draw_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
                || draw_color_vector->v.size() == 0)
              {
***************
*** 9018,9024 ****
                   || shape_type == RECTANGLE_TYPE 
                   || shape_type == REG_POLYGON_TYPE)
!              && (   draw_color_vector != 0 && draw_color_vector->ctr > 1
!                  || pen_vector != 0 && pen_vector->ctr > 1
!                  || dash_pattern_vector != 0 && dash_pattern_vector->ctr > 1)
             )
  
--- 9052,9061 ----
                   || shape_type == RECTANGLE_TYPE 
                   || shape_type == REG_POLYGON_TYPE)
!              && (  (    draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                     && draw_color_vector->ctr > 1)
!                  || (   pen_vector != static_cast<Pointer_Vector<Pen>*>(0) 
!                      && pen_vector->ctr > 1)
!                  || (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                      && dash_pattern_vector->ctr > 1))
             )
  
***************
*** 9075,9079 ****
    
  
!                if (dash_pattern_vector != 0 && dash_pattern_vector->ctr > 0)
                    {
                        dash_pattern_iter = dash_pattern_vector->v.begin();
--- 9112,9117 ----
    
  
!                if (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                    && dash_pattern_vector->ctr > 0)
                    {
                        dash_pattern_iter = dash_pattern_vector->v.begin();
***************
*** 9094,9098 ****
                             << endl;
  
!                       if (do_pens && pen_vector != 0)
                           cerr << "`pen_vector->v.size' == " 
                                << pen_vector->v.size()
--- 9132,9136 ----
                             << endl;
  
!                       if (do_pens && pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
                           cerr << "`pen_vector->v.size' == " 
                                << pen_vector->v.size()
***************
*** 9102,9106 ****
                             << endl;
  
!                       if (do_dash_patterns && dash_pattern_vector != 0)
                           cerr << "`dash_pattern_vector->v.size' == " 
                                << dash_pattern_vector->v.size()
--- 9140,9145 ----
                             << endl;
  
!                       if (do_dash_patterns && dash_pattern_vector 
!                              != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
                           cerr << "`dash_pattern_vector->v.size' == " 
                                << dash_pattern_vector->v.size()
***************
*** 9334,9345 ****
  @q ****** (6).@> 
                 
!            }  /*  |if (    (   shape_type == POLYGON_TYPE 
!                             || shape_type == TRIANGLE_TYPE 
!                             || shape_type == RECTANGLE_TYPE 
!                             || shape_type == REG_POLYGON_TYPE)
!                         && (   draw_color_vector != 0 && draw_color_vector->ctr > 1
!                             || pen_vector != 0 && pen_vector->ctr > 1
!                             || dash_pattern_vector != 0 && dash_pattern_vector->ctr > 1)
!                       )|  */
  
  @q ***** (5).@>   
--- 9373,9377 ----
  @q ****** (6).@> 
                 
!            }  /*  |if|  */
  
  @q ***** (5).@>   
***************
*** 9357,9361 ****
  @<Define |Path| functions@>=
  
!         else if (   pen_vector == 0 || pen_vector->ctr == 0 
                   || pen_vector->v[0]->get_type() != Pen::NULL_PEN)  
                  
--- 9389,9394 ----
  @<Define |Path| functions@>=
  
!         else if (   pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!                  || pen_vector->ctr == 0 
                   || pen_vector->v[0]->get_type() != Pen::NULL_PEN)  
                  
***************
*** 9366,9370 ****
                 if (DEBUG)
                    {
!                       if (pen_vector == 0)
                           cerr << "`pen_vector' == 0." << endl;
  
--- 9399,9403 ----
                 if (DEBUG)
                    {
!                       if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
                           cerr << "`pen_vector' == 0." << endl;
  
***************
*** 9409,9424 ****
                 @<Output |Path|@>@;
  
!                if (draw_color_vector != 0 && draw_color_vector->ctr > 0)
                    *out_stream << endl << "withcolor " << *(draw_color_vector->v[0]) << " ";
  
!                if (pen_vector != 0 && pen_vector->ctr > 0)
                    *out_stream << endl << "withpen " << *(pen_vector->v[0]) << " ";
  
!                if (dash_pattern_vector != 0 && dash_pattern_vector->ctr > 0)
                    *out_stream << endl << *(dash_pattern_vector->v[0]);
  
                 *out_stream << ";\n" << flush;
  
!            }  /*  |else if (   pen_vector == 0 || pen_vector->ctr == 0 
                              || pen_vector->v[0]->get_type() != Pen::NULL_PEN)| 
                    (Not dividing |Path|.)  */
--- 9442,9460 ----
                 @<Output |Path|@>@;
  
!                if (   draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                    && draw_color_vector->ctr > 0)
                    *out_stream << endl << "withcolor " << *(draw_color_vector->v[0]) << " ";
  
!                if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0) && pen_vector->ctr > 0)
                    *out_stream << endl << "withpen " << *(pen_vector->v[0]) << " ";
  
!                if (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!                    && dash_pattern_vector->ctr > 0)
                    *out_stream << endl << *(dash_pattern_vector->v[0]);
  
                 *out_stream << ";\n" << flush;
  
!            }  /*  |else if (   pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!                             || pen_vector->ctr == 0 
                              || pen_vector->v[0]->get_type() != Pen::NULL_PEN)| 
                    (Not dividing |Path|.)  */
***************
*** 9540,9544 ****
  @<Handle |pen|@>=
  
!   if (pen_vector != 0 && pen_vector->ctr > 0)
      {
  
--- 9576,9580 ----
  @<Handle |pen|@>=
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0) && pen_vector->ctr > 0)
      {
  
***************
*** 9563,9567 ****
  @<Handle |dash_pattern|@>=
  
!   if (dash_pattern_vector != 0 && dash_pattern_vector->ctr > 0)
      {
  
--- 9599,9604 ----
  @<Handle |dash_pattern|@>=
  
!   if (   dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!       && dash_pattern_vector->ctr > 0)
      {
  
***************
*** 9650,9660 ****
  
     else if (coords == 'p')
!       cerr << "Projective coordinates.\n" << flush;
  
     else if (coords == 'u')
!      cerr << "User coordinates.\n" << flush;
  
     else if (coords == 'v')
!      cerr << "View coordinates.\n" << flush;
  
     else
--- 9687,9697 ----
  
     else if (coords == 'p')
!       cerr << "Projective coordinates.\n";
  
     else if (coords == 'u')
!      cerr << "User coordinates.\n";
  
     else if (coords == 'v')
!      cerr << "View coordinates.\n";
  
     else
***************
*** 9682,9690 ****
  
     cerr << "connectors.size() == " 
!         << connectors.size() << endl << flush;  
  
     if (connectors.size() == 0)
       {
!        cerr << "Using \"--\" as connector.\n" << flush;
         connector_string  = "--";
       }
--- 9719,9727 ----
  
     cerr << "connectors.size() == " 
!         << connectors.size() << endl;  
  
     if (connectors.size() == 0)
       {
!        cerr << "Using \"--\" as connector.\n";
         connector_string  = "--";
       }
***************
*** 9755,9764 ****
     cerr << endl;
  
!    if (fill_color_vector == 0)
       cerr << "`fill_color_vector' == 0" << endl;
     else
       fill_color_vector->show("fill_color_vector:");
  
!    if (draw_color_vector == 0)
        cerr << "`draw_color_vector' == 0" << endl;
     else
--- 9792,9801 ----
     cerr << endl;
  
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
       cerr << "`fill_color_vector' == 0" << endl;
     else
       fill_color_vector->show("fill_color_vector:");
  
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        cerr << "`draw_color_vector' == 0" << endl;
     else
***************
*** 9766,9775 ****
  
  
!    if (pen_vector == 0)
        cerr << "`pen_vector' == 0" << endl;
     else
        pen_vector->show("pen_vector:");
  
!    if (dash_pattern_vector == 0)
        cerr << "`dash_pattern_vector' == 0" << endl;
     else
--- 9803,9812 ----
  
  
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        cerr << "`pen_vector' == 0" << endl;
     else
        pen_vector->show("pen_vector:");
  
!    if (dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        cerr << "`dash_pattern_vector' == 0" << endl;
     else
***************
*** 9786,9790 ****
       cerr << "`arrow' == `Path::NO_ARROW'.";
  
!    cerr << endl << flush;
  
     return;
--- 9823,9827 ----
       cerr << "`arrow' == `Path::NO_ARROW'.";
  
!    cerr << endl;
  
     return;
***************
*** 9806,9818 ****
  Path::show_colors(bool stop)
  {
!   if (draw_color_vector != 0)
      draw_color_vector->show("draw_color_vector:");
    else
!     cerr << "draw_color_vector == 0.\n";
  
!   if (fill_color_vector != 0)
      fill_color_vector->show("fill_color_vector:");
    else
!     cerr << "fill_color_vector == 0.\n";
  
    if (stop)
--- 9843,9855 ----
  Path::show_colors(bool stop)
  {
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      draw_color_vector->show("draw_color_vector:");
    else
!     cerr << "draw_color_vector == static_cast<Pointer_Vector<Color>*>(0).\n";
  
!   if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
      fill_color_vector->show("fill_color_vector:");
    else
!     cerr << "fill_color_vector == static_cast<Pointer_Vector<Color>*>(0).\n";
  
    if (stop)
***************
*** 9955,9959 ****
  #if 0 
        cerr << "WARNING! In Path::is_planar():\n"
!            << "Path is linear.  Returning true.\n\n" << flush;
  #endif 
        if (verbose)
--- 9992,9996 ----
  #if 0 
        cerr << "WARNING! In Path::is_planar():\n"
!            << "Path is linear.  Returning true.\n\n";
  #endif 
        if (verbose)
***************
*** 11105,11109 ****
      {
        cerr << "ERROR! In Path::slope(). Path is not linear!\n"
!            << "Returning INVALID_REAL\n" << flush;
        return INVALID_REAL;
      }
--- 11142,11146 ----
      {
        cerr << "ERROR! In Path::slope(). Path is not linear!\n"
!            << "Returning INVALID_REAL\n";
        return INVALID_REAL;
      }
***************
*** 11166,11170 ****
        cerr << "ERROR! In Path::subpath():\n"
             << "The \"start\" argument is < the \"end\" argument.\n"
!            << "Returning empty Path.\n\n" << flush;
        return p;  
      }
--- 11203,11207 ----
        cerr << "ERROR! In Path::subpath():\n"
             << "The \"start\" argument is < the \"end\" argument.\n"
!            << "Returning empty Path.\n\n";
        return p;  
      }
***************
*** 11177,11182 ****
        cerr << "ERROR! In Path::subpath():\n"
             << "\"start\" argument is > points.size() - 1.\n"
!            << "Will try to recover by setting start = 0.\n\n"
!            << flush;
        start = 0;
      }
--- 11214,11219 ----
        cerr << "ERROR! In Path::subpath():\n"
             << "\"start\" argument is > points.size() - 1.\n"
!            << "Will try to recover by setting start = 0.\n\n";
! 
        start = 0;
      }
***************
*** 11186,11191 ****
        cerr << "ERROR! In Path::subpath():\n"
             << "\"end\" argument is > points.size().\n"
!            << "Will try to recover by setting end = points.size().\n\n"
!            << flush;
        end = points.size();
      }
--- 11223,11228 ----
        cerr << "ERROR! In Path::subpath():\n"
             << "\"end\" argument is > points.size().\n"
!            << "Will try to recover by setting end = points.size().\n\n";
! 
        end = points.size();
      }
***************
*** 11204,11208 ****
                cerr << "ERROR! In Path::subpath():\n"
                     << "end argument > points.size().\n"
!                << "Breaking out of loop.\n\n" << flush;
                break;
              }
--- 11241,11245 ----
                cerr << "ERROR! In Path::subpath():\n"
                     << "end argument > points.size().\n"
!                << "Breaking out of loop.\n\n";
                break;
              }
***************
*** 11241,11245 ****
      }
    if (DEBUG)   
!     cerr << "p.connectors.size() == " << p.connectors.size() << endl << flush;
    
    Path q;
--- 11278,11282 ----
      }
    if (DEBUG)   
!     cerr << "p.connectors.size() == " << p.connectors.size() << endl;
    
    Path q;
***************
*** 11309,11313 ****
          cerr << "ERROR! In Path::get_point():\n"
               << "Argument is >= size of Path.\n"
!              << "Returning INVALID_POINT.\n\n"  << flush;
          return INVALID_POINT;
        }
--- 11346,11350 ----
          cerr << "ERROR! In Path::get_point():\n"
               << "Argument is >= size of Path.\n"
!              << "Returning INVALID_POINT.\n\n" ;
          return INVALID_POINT;
        }
***************
*** 11349,11353 ****
          cerr << "ERROR! In Path::get_point():\n"
               << "Argument is >= size of Path.\n"
!              << "Returning INVALID_POINT.\n\n"  << flush;
          return INVALID_POINT;
        }
--- 11386,11390 ----
          cerr << "ERROR! In Path::get_point():\n"
               << "Argument is >= size of Path.\n"
!              << "Returning INVALID_POINT.\n\n" ;
          return INVALID_POINT;
        }
***************
*** 11390,11394 ****
          cerr << "ERROR! In Path::get_last_point():\n"
               << "Path is empty.\n"
!              << "Returning INVALID_POINT.\n\n"  << flush;
          return INVALID_POINT;
        }
--- 11427,11431 ----
          cerr << "ERROR! In Path::get_last_point():\n"
               << "Path is empty.\n"
!              << "Returning INVALID_POINT.\n\n" ;
          return INVALID_POINT;
        }
***************
*** 11531,11537 ****
  Path::get_normal(void) const
  {
!   bool DEBUG = false; /* |true|  */@; 
    if (DEBUG)
!     cerr << "Entering Path::get_normal().\n" << flush;
  
    Point origin_pt(0, 0, 0);
--- 11568,11579 ----
  Path::get_normal(void) const
  {
!   volatile bool DEBUG = false; /* |true|  */@; 
! 
    if (DEBUG)
!   {
!      cerr_mutex.lock(); 
!      cerr << "Entering Path::get_normal().\n";
!      cerr_mutex.unlock(); 
!   }
  
    Point origin_pt(0, 0, 0);
***************
*** 11542,11546 ****
        cerr << "WARNING! In Path::get_normal():\n"
          << "Path is empty or contains only one Point. "
!         << "Returning INVALID_POINT.\n\n" << flush;
        cerr_mutex.unlock();  
  
--- 11584,11588 ----
        cerr << "WARNING! In Path::get_normal():\n"
          << "Path is empty or contains only one Point. "
!         << "Returning INVALID_POINT.\n\n";
        cerr_mutex.unlock();  
  
***************
*** 11562,11566 ****
            cerr << "WARNING! In Path::get_normal():\n"
                 << "Connector may make Path non-linear or non-planar: " 
!                << *iter << endl << "Returning INVALID_POINT.\n\n" << flush;
            cerr_mutex.unlock();  
  
--- 11604,11608 ----
            cerr << "WARNING! In Path::get_normal():\n"
                 << "Connector may make Path non-linear or non-planar: " 
!                << *iter << endl << "Returning INVALID_POINT.\n\n";
            cerr_mutex.unlock();  
  
***************
*** 11581,11585 ****
  #if 0 
        cerr << "WARNING! In Path::get_normal():\n"
!            << "Path has 2 Points.  Returning origin_pt.\n\n" << flush;
  #endif 
        return origin_pt;
--- 11623,11627 ----
  #if 0 
        cerr << "WARNING! In Path::get_normal():\n"
!            << "Path has 2 Points.  Returning origin_pt.\n\n";
  #endif 
        return origin_pt;
***************
*** 11605,11618 ****
    
    if (iter == points.end() && b0 == origin_pt)
!     {
!       if (DEBUG) 
!       cerr_mutex.lock(); 
!       cerr << "Exiting Path::get_normal(). "
!            << "Points are all colinear.\n"
!            << "Returning origin_pt.\n\n";
!       cerr_mutex.unlock();  
  
!       return origin_pt;
!     }
  
    if (DEBUG) 
--- 11647,11670 ----
    
    if (iter == points.end() && b0 == origin_pt)
!   {
!     if (DEBUG) 
!     cerr_mutex.lock(); 
!     cerr << "Exiting Path::get_normal(). "
!          << "Points are all colinear.\n"
!          << "Returning origin_pt.\n\n";
!     cerr_mutex.unlock();  
  
!     return origin_pt;
!   }
! #if DEBUG_COMPILE
!   else if (DEBUG)
!   {
!     cerr_mutex.lock(); 
!     cerr << "Exiting Path::get_normal(). "
!          << "Points are not all colinear.\n";
!     cerr_mutex.unlock();  
!           
!   }  /* |else if (DEBUG)|  */
! #endif  /* |DEBUG_COMPILE|  */ 
  
    if (DEBUG) 
***************
*** 11632,11637 ****
            cerr << "Exiting Path::get_normal(). " 
                 << "Points are all colinear except for one.\n"
!                << "Returning normal.\n\n"
!                << flush;
          }
        return -b0;
--- 11684,11689 ----
            cerr << "Exiting Path::get_normal(). " 
                 << "Points are all colinear except for one.\n"
!                << "Returning normal.\n\n";
! 
          }
        return -b0;
***************
*** 11673,11677 ****
              cerr_mutex.lock(); 
              cerr << "Exiting Path::get_normal(). " 
!                  << "Returning INVALID_POINT.\n\n" << flush;
              cerr_mutex.unlock();  
            }
--- 11725,11729 ----
              cerr_mutex.lock(); 
              cerr << "Exiting Path::get_normal(). " 
!                  << "Returning INVALID_POINT.\n\n";
              cerr_mutex.unlock();  
            }
***************
*** 11720,11724 ****
        cerr << "ERROR! In Point::get_normal():\n"
             << "The Points do not determine a plane.\n"
!            << "Returning INVALID_POINT.\n\n" << flush;
        cerr_mutex.unlock();  
        return INVALID_POINT;
--- 11772,11776 ----
        cerr << "ERROR! In Point::get_normal():\n"
             << "The Points do not determine a plane.\n"
!            << "Returning INVALID_POINT.\n\n";
        cerr_mutex.unlock();  
        return INVALID_POINT;
***************
*** 11829,11833 ****
            cerr << "WARNING! In Point::is_in_triangle():\n"
              << "The Point arguments do not determine a plane.\n"
!               << "Returning false.\n\n" << flush;
          }
        return false;
--- 11881,11885 ----
            cerr << "WARNING! In Point::is_in_triangle():\n"
              << "The Point arguments do not determine a plane.\n"
!               << "Returning false.\n\n";
          }
        return false;
***************
*** 11840,11844 ****
              << "*this doesn't lie in the plane determined "
                << "by the arguments.\n"
!                 << "Returning false.\n\n" << flush;
              }
        return false;
--- 11892,11896 ----
              << "*this doesn't lie in the plane determined "
                << "by the arguments.\n"
!                 << "Returning false.\n\n";
              }
        return false;
***************
*** 11885,11893 ****
    bool exchange_y_z = false;
    bool exchange_x_z = false;
!   if (lambda_denominator == 0 || mu_denominator == 0)
      {
        if (DEBUG)
          cerr << "lambda_denominator or mu_denominator == 0. "
!              << "Exchanging y and z-coordinates.\n" << flush;
        real temp;
  
--- 11937,11945 ----
    bool exchange_y_z = false;
    bool exchange_x_z = false;
!   if (lambda_denominator == ZERO_REAL || mu_denominator == ZERO_REAL)
      {
        if (DEBUG)
          cerr << "lambda_denominator or mu_denominator == 0. "
!              << "Exchanging y and z-coordinates.\n";
        real temp;
  
***************
*** 11912,11921 ****
  
  
!       if (!(lambda_denominator == 0 || mu_denominator == 0))
          {
            if (DEBUG)
              cerr << "Exchanging y and z-coordinates worked.\n" 
!                  << "lambda_denominator and mu_denominator are no longer 0.\n" 
!                  << flush;
            exchange_y_z = true;
          }
--- 11964,11973 ----
  
  
!       if (!(lambda_denominator == ZERO_REAL || mu_denominator == ZERO_REAL))
          {
            if (DEBUG)
              cerr << "Exchanging y and z-coordinates worked.\n" 
!                  << "lambda_denominator and mu_denominator are no longer 0.\n";
! 
            exchange_y_z = true;
          }
***************
*** 11924,11929 ****
            if (DEBUG)
              cerr << "Exchanging y and z-coordinates didn't work.\n" 
!                  << "Exchanging x and z-coordinates.\n" 
!                  << flush;
  
  @ First, put things back the way they were.
--- 11976,11980 ----
            if (DEBUG)
              cerr << "Exchanging y and z-coordinates didn't work.\n" 
!                  << "Exchanging x and z-coordinates.\n";
  
  @ First, put things back the way they were.
***************
*** 11970,11979 ****
            mu_denominator = ((e_x -  c_x) * (d_y - c_y)) - ((e_y - c_y) * (d_x - c_x));
  
!           if (!(lambda_denominator == 0 || mu_denominator == 0))
              {
                if (DEBUG)
                  cerr << "Exchanging x and z-coordinates worked.\n" 
!                   << "lambda_denominator and mu_denominator are no longer 0.\n" 
!                     << flush;
                exchange_x_z = true;
              }
--- 12021,12030 ----
            mu_denominator = ((e_x -  c_x) * (d_y - c_y)) - ((e_y - c_y) * (d_x - c_x));
  
!           if (!(lambda_denominator == ZERO_REAL || mu_denominator == ZERO_REAL))
              {
                if (DEBUG)
                  cerr << "Exchanging x and z-coordinates worked.\n" 
!                   << "lambda_denominator and mu_denominator are no longer 0.\n";
! 
                exchange_x_z = true;
              }
***************
*** 11984,11988 ****
                    cerr << "WARNING! In Point::is_in_triangle():\n"
                      << "lambda_denominator or mu_denominator is 0.\n"
!                       << "Returning false.\n\n" << flush;
                  }
                return false;
--- 12035,12039 ----
                    cerr << "WARNING! In Point::is_in_triangle():\n"
                      << "lambda_denominator or mu_denominator is 0.\n"
!                       << "Returning false.\n\n";
                  }
                return false;
***************
*** 11999,12008 ****
    if (DEBUG)
      {
!       cerr << "lambda == " << lambda << endl << flush;
!       cerr << "mu == " << mu << endl << flush;
!       cerr << "lambda + mu == " << lambda + mu << endl << flush;
  
        cerr << "(lambda >= 0 && mu >= 0 && ((lambda + mu) <= 1)) == "
!            << (lambda >= 0 && mu >= 0 && ((lambda + mu) <= 1)) << endl << flush;
      }
   
--- 12050,12059 ----
    if (DEBUG)
      {
!       cerr << "lambda == " << lambda << endl;
!       cerr << "mu == " << mu << endl;
!       cerr << "lambda + mu == " << lambda + mu << endl;
  
        cerr << "(lambda >= 0 && mu >= 0 && ((lambda + mu) <= 1)) == "
!            << (lambda >= 0 && mu >= 0 && ((lambda + mu) <= 1)) << endl;
      }
   
***************
*** 12018,12022 ****
          cerr << "The Point doesn't lie within the triangle. "
               << "Returning false."; 
!       cerr << endl << endl << flush;
      }
    return b;  
--- 12069,12073 ----
          cerr << "The Point doesn't lie within the triangle. "
               << "Returning false."; 
!       cerr << endl << endl;
      }
    return b;  
***************
*** 12181,12185 ****
  Path::adjust_draw_color_vector(void)
  {
!    if (draw_color_vector == 0 || draw_color_vector->ctr <= 0)
        return 1;
  
--- 12232,12237 ----
  Path::adjust_draw_color_vector(void)
  {
!    if (   draw_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!        || draw_color_vector->ctr <= 0)
        return 1;
  
***************
*** 12227,12231 ****
  Path::adjust_pen_vector(void)
  {
!    if (pen_vector == 0 || pen_vector->ctr <= 0)
        return 1;
  
--- 12279,12283 ----
  Path::adjust_pen_vector(void)
  {
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0) || pen_vector->ctr <= 0)
        return 1;
  
***************
*** 12273,12277 ****
  Path::adjust_dash_pattern_vector(void)
  {
!    if (dash_pattern_vector == 0 || dash_pattern_vector->ctr <= 0)
        return 1;
  
--- 12325,12330 ----
  Path::adjust_dash_pattern_vector(void)
  {
!    if (   dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0) 
!        || dash_pattern_vector->ctr <= 0)
        return 1;
  
***************
*** 12594,12598 ****
        {
            cerr << "Haven't coded this case yet. "
!                << "Returning INVALID_BOOL_POINT.\n" << flush;
            return INVALID_BOOL_POINT;
        }
--- 12647,12651 ----
        {
            cerr << "Haven't coded this case yet. "
!                << "Returning INVALID_BOOL_POINT.\n";
            return INVALID_BOOL_POINT;
        }
***************
*** 12652,12656 ****
        cerr << "ERROR! In Plane::intersection_point(const Path&):"
             << endl << "Path is not linear!  Returning INVALID_BOOL_POINT."
!            << endl << endl << flush;
        return INVALID_BOOL_POINT;
      }
--- 12705,12709 ----
        cerr << "ERROR! In Plane::intersection_point(const Path&):"
             << endl << "Path is not linear!  Returning INVALID_BOOL_POINT."
!            << endl << endl;
        return INVALID_BOOL_POINT;
      }
***************
*** 12800,12806 ****
  
   
!   x_pt = (shift_x != 0) ? *shift_x : origin_pt;
!   y_pt = (shift_y != 0) ? *shift_y : origin_pt;
!   z_pt = (shift_z != 0) ? *shift_z : origin_pt;
  
  @  
--- 12853,12859 ----
  
   
!   x_pt = (shift_x != static_cast<const Point*>(0)) ? *shift_x : origin_pt;
!   y_pt = (shift_y != static_cast<const Point*>(0)) ? *shift_y : origin_pt;
!   z_pt = (shift_z != static_cast<const Point*>(0)) ? *shift_z : origin_pt;
  
  @  
***************
*** 12813,12817 ****
        cerr << "WARNING! In draw_axes():" << endl 
             << "All axes are suppressed. Returning." 
!            << endl << endl << flush;
        return;
      }
--- 12866,12870 ----
        cerr << "WARNING! In draw_axes():" << endl 
             << "All axes are suppressed. Returning." 
!            << endl << endl;
        return;
      }
***************
*** 12938,12942 ****
      {
        cerr << "ERROR! In Path::get_line():\n"
!            << "Path is not linear. Returning INVALID_LINE.\n\n" << flush;
        return INVALID_LINE;
      }
--- 12991,12995 ----
      {
        cerr << "ERROR! In Path::get_line():\n"
!            << "Path is not linear. Returning INVALID_LINE.\n\n";
        return INVALID_LINE;
      }
***************
*** 13121,13127 ****
  @q ***** (5) Preliminaries.@>   
  
! #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
! #endif /* |DEBUG_COMPILE|  */@; 
  
     stringstream cerr_strm;
--- 13174,13178 ----
  @q ***** (5) Preliminaries.@>   
  
!    volatile bool DEBUG = false; /* |true| */ @; 
  
     stringstream cerr_strm;
***************
*** 13161,13165 ****
  @<Define |Path| functions@>=
  
!    if (p == 0 || pv == 0)
     {
         cerr_strm << "ERROR! In `Path::decompose':"
--- 13212,13216 ----
  @<Define |Path| functions@>=
  
!    if (p == static_cast<Point*>(0) || pv == static_cast<Pointer_Vector<Path>*>(0))
     {
         cerr_strm << "ERROR! In `Path::decompose':"
***************
*** 13230,13234 ****
  @<Define |Path| functions@>=
  
!          if (br.second == 0 || br.second == 1)
           {
  #if DEBUG_COMPILE
--- 13281,13285 ----
  @<Define |Path| functions@>=
  
!          if (br.second == ZERO_REAL || br.second == 1)
           {
  #if DEBUG_COMPILE
***************
*** 13734,13738 ****
  
  
!                 if (blend_value_denominator != 0)
                     *C_of_u /= blend_value_denominator;
  
--- 13785,13789 ----
  
  
!                 if (blend_value_denominator != ZERO_REAL)
                     *C_of_u /= blend_value_denominator;
  
***************
*** 13876,13882 ****
  @q ***** (5) Preliminaries.@>   
  
! #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
! #endif /* |DEBUG_COMPILE|  */@; 
  
     stringstream cerr_strm;
--- 13927,13931 ----
  @q ***** (5) Preliminaries.@>   
  
!    volatile bool DEBUG = false; /* |true| */ @; 
  
     stringstream cerr_strm;
***************
*** 13941,13944 ****
--- 13990,14005 ----
    }  
  
+ #if DEBUG_COMPILE
+    if (DEBUG)
+    {
+        cerr_mutex.lock();
+        position.show("position:");
+        direction.show("direction:");
+        cerr_mutex.unlock(); 
+ 
+    }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
  @q ***** (5)@>
  
***************
*** 13992,13998 ****
    normal.shift(position);
  
    real temp_angle = (up - position).angle(direction - position);
  
!   up.rotate(normal, position, 90 - temp_angle);
  
    if (up.get_y() < 0)
--- 14053,14091 ----
    normal.shift(position);
  
+ 
+   Point temp_pt[2];
+ 
+   temp_pt[0] = (up - position);
+   temp_pt[1] = (direction - position);
+ 
    real temp_angle = (up - position).angle(direction - position);
  
! #if DEBUG_COMPILE
!    if (DEBUG)
!    {
!        cerr_mutex.lock(); 
!        temp_pt[0].show("temp_pt[0]:");
!        temp_pt[1].show("temp_pt[1]:");
! 
!        cerr << "temp_angle == " << temp_angle << endl;
!           up.show("up before rotation:");
!        cerr_mutex.unlock(); 
! 
!    }  /* |if (DEBUG)|  */
! #endif  /* |DEBUG_COMPILE|  */ 
! 
!    up.rotate(normal, position, 90 - temp_angle);
! 
! #if DEBUG_COMPILE
!    if (DEBUG)
!    {
!        cerr_mutex.lock(); 
!        up.show("up after rotation:");
!        cerr << "up.get_y == " << up.get_y() << endl
!             << "(up.get_y() < 0.0F) " << (up.get_y() < 0.0F) << endl;
!        cerr_mutex.unlock(); 
! 
!    }  /* |if (DEBUG)|  */
! #endif  /* |DEBUG_COMPILE|  */ 
  
    if (up.get_y() < 0)
***************
*** 14183,14187 ****
  @q ****** (6)@>
  
!     } /* |if (angle != 0)|  */
  
  @q ***** (5)@>
--- 14276,14280 ----
  @q ****** (6)@>
  
!     } /* |if (fabs(angle) > tolerance)|  */
  
  @q ***** (5)@>
diff -rc2P 3DLDF-2.0.2/src/patterns.web 3DLDF-2.0.3/src/patterns.web
*** 3DLDF-2.0.2/src/patterns.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/patterns.web	Fri Dec 13 11:40:23 2013
***************
*** 269,305 ****
      }
  
- @
-     
- \LOG
- \initials{LDF 2002.09.22.}
- This is necessary, because |Path::fill()| interprets ``|""|''
- as |"black"|.  In |hex_pattern_1()|, it may be necessary to have a
- placeholder for a |fill_color|, and it's better to be able to use
- ``|""|'' than to have to type ``|background|''. 
- 
- \initials{LDF 2002.09.24.} Changed this, because I'm now using
- |class Color| instead of |strings|.  Now it looks like I'm going to have
- to use ``|*Colors::background_color|'' as a placeholder.  
- I'm going to have to check to see what the consequences 
- of this change are here.  
- 
- \initials{LDF 2004.06.07.}  Now setting
- |fill_color_outer = 0| instead of 
- |fill_color_outer = Colors::background_color|, because I've gotten rid of
- |Colors::background_color|.
- \ENDLOG 
- 
- @<Define Pattern functions@>=
-   if (fill_color_outer == 0) 
-                              
-  
-     fill_color_outer = 0;
- 
-   if (fill_color_middle == 0)
-     fill_color_middle = 0;
- 
-   if (fill_color_inner == 0)
-     fill_color_inner = 0;
- 
  @ Having |do_middle| and |do_inner| is a convenience, so I don't have to check
  whether |diameter_middle| and |diameter_inner| are $\equiv 0$ below, which
--- 269,272 ----
***************
*** 312,317 ****
    bool do_inner;
    
!   do_middle = (diameter_middle == 0) ? false : true; 
!   do_inner = (diameter_inner == 0) ? false : true; 
  
  @
--- 279,284 ----
    bool do_inner;
    
!   do_middle = (diameter_middle == ZERO_REAL) ? false : true; 
!   do_inner = (diameter_inner == ZERO_REAL) ? false : true; 
  
  @
***************
*** 490,494 ****
            for (i = i_min; i < i_max; ++i) 
              {
!               if (fill_color_outer == 0)
                  p_outer_copy.draw(picture, draw_color_outer,
                                    0, &pen_outer);
--- 457,461 ----
            for (i = i_min; i < i_max; ++i) 
              {
!               if (fill_color_outer == static_cast<Color*>(0))
                  p_outer_copy.draw(picture, draw_color_outer,
                                    0, &pen_outer);
diff -rc2P 3DLDF-2.0.2/src/pblexpr.w 3DLDF-2.0.3/src/pblexpr.w
*** 3DLDF-2.0.2/src/pblexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/pblexpr.w	Fri Dec 13 12:06:55 2013
***************
*** 119,126 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!         @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 119,126 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!         @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 362,366 ****
  @q **** (4).@> 
  
!   if (entry == 0)
      {
  
--- 362,366 ----
  @q **** (4).@> 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 424,428 ****
  @q **** (4).@> 
  
!   if (entry == 0)
      {
  
--- 424,428 ----
  @q **** (4).@> 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 513,519 ****
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    *b = (p == 0 || *p  == INVALID_POINT) ? false : true;
  
!    delete p;   
  
     @=$$@> = static_cast<void*>(b);
--- 513,524 ----
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    *b = (   p == static_cast<Point*>(0) 
!          || *p  == INVALID_POINT) ? false : true;
  
!    if (p)
!    {
!       delete p;   
!       p = static_cast<Point*>(0);
!    }
  
     @=$$@> = static_cast<void*>(b);
***************
*** 537,543 ****
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    *b = (p == 0 || *p  == INVALID_POINT) ? true : false;
  
!    delete p;   
  
     @=$$@> = static_cast<void*>(b);
--- 542,552 ----
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    *b = (p == static_cast<Point*>(0) || *p  == INVALID_POINT) ? true : false;
  
!    if (p) 
!    {
!       delete p;   
!       p = 0;
!    }
  
     @=$$@> = static_cast<void*>(b);
***************
*** 566,570 ****
         = static_cast<Pointer_Vector<Bool_Point>*>(@=$2@>); 
  
!     *b = (bpv == 0 || bpv->v.size() <= 0) ? false : true;
  
      delete bpv;
--- 575,580 ----
         = static_cast<Pointer_Vector<Bool_Point>*>(@=$2@>); 
  
!     *b = (   bpv == static_cast<Pointer_Vector<Bool_Point>*>(0) 
!           || bpv->v.size() <= 0) ? false : true;
  
      delete bpv;
***************
*** 595,599 ****
      Pointer_Vector<Bool_Point>* bpv = static_cast<Pointer_Vector<Bool_Point>*>(@=$2@>); 
  
!     *b = (bpv == 0 || bpv->v.size() <= 0) ? true : false;
  
      delete bpv;
--- 605,610 ----
      Pointer_Vector<Bool_Point>* bpv = static_cast<Pointer_Vector<Bool_Point>*>(@=$2@>); 
  
!     *b = (   bpv == static_cast<Pointer_Vector<Bool_Point>*>(0) 
!           || bpv->v.size() <= 0) ? true : false;
  
      delete bpv;
***************
*** 681,685 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
--- 692,696 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 2070,2074 ****
      Path* q = static_cast<Path*>(@=$3@>);
     
!     *i = (p && q != 0 && p->is_coplanar(*q)) ? 1 : 0;
  
      delete p;
--- 2081,2085 ----
      Path* q = static_cast<Path*>(@=$3@>);
     
!     *i = (p && q && p->is_coplanar(*q)) ? 1 : 0;
  
      delete p;
***************
*** 2646,2650 ****
             delete p;
             delete e;
!            @=$$@> = 0;
         }
  
--- 2657,2661 ----
             delete p;
             delete e;
!            @=$$@> = static_cast<void*>(0);
         }
  
***************
*** 2684,2689 ****
  {
  
- 
- 
      Bool_Point* bp = static_cast<Bool_Point*>(@=$1@>);    
  
--- 2695,2698 ----
***************
*** 2694,2698 ****
             delete bp;
             delete e;
!            @=$$@> = 0;
         }
  
--- 2703,2707 ----
             delete bp;
             delete e;
!            @=$$@> = static_cast<void*>(0);
         }
  
***************
*** 2858,2862 ****
     bool* b = new bool;
  
!    *b = (pv == 0) ? false : pv->are_distinct(@=$3@>, 10, parameter);
  
     delete pv;
--- 2867,2872 ----
     bool* b = new bool;
  
!    *b = (pv == static_cast<Pointer_Vector<Point>*>(0)) ? 
!             false : pv->are_distinct(@=$3@>, 10, parameter);
  
     delete pv;
***************
*** 2889,2893 ****
     bool* b = new bool;
  
!    *b = (pv == 0) ? false : pv->are_distinct(@=$3@>, 10, parameter);
  
     delete pv;
--- 2899,2904 ----
     bool* b = new bool;
  
!    *b = (pv == static_cast<Pointer_Vector<Point>*>(0)) ? 
!             false : pv->are_distinct(@=$3@>, 10, parameter);
  
     delete pv;
***************
*** 2923,2927 ****
  @=predicate_clause: /* Empty */@>@/
  {
!    @=$$@> = 0;
  }   
  
--- 2934,2938 ----
  @=predicate_clause: /* Empty */@>@/
  {
!    @=$$@> = static_cast<void*>(0);
  }   
  
***************
*** 2946,2950 ****
     *(scanner_node->tolerance) = @=$2@>; 
  
!    @=$$@> = 0;
  }   
  
--- 2957,2961 ----
     *(scanner_node->tolerance) = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  }   
  
***************
*** 3093,3097 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
--- 3104,3108 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<bool>*>(0))
        {
  
***************
*** 3378,3382 ****
  @<Define rules@>=
  
!   if (p == 0 || q == 0)
      {
  
--- 3389,3393 ----
  @<Define rules@>=
  
!   if (p == static_cast<Point*>(0) || q == static_cast<Point*>(0))
      {
  
diff -rc2P 3DLDF-2.0.2/src/pblvexpr.w 3DLDF-2.0.3/src/pblvexpr.w
*** 3DLDF-2.0.2/src/pblvexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/pblvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pbpexpr.w 3DLDF-2.0.3/src/pbpexpr.w
*** 3DLDF-2.0.2/src/pbpexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/pbpexpr.w	Fri Dec 13 12:14:30 2013
***************
*** 104,108 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 104,108 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 261,269 ****
  @<Define rules@>=
  
!    if (bpv == 0)
        {
            delete bp;
  
!           @=$$@> = 0;
  
        }  /* |if (bpv == 0)|  */
--- 261,269 ----
  @<Define rules@>=
  
!    if (bpv == static_cast<Pointer_Vector<Bool_Point>*>(0))
        {
            delete bp;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (bpv == 0)|  */
***************
*** 281,285 ****
            delete bp;
  
!           @=$$@> = 0;
  
        }  /* |else if (bpv->ctr == 0)|  */
--- 281,285 ----
            delete bp;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (bpv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pbpvexpr.w 3DLDF-2.0.3/src/pbpvexpr.w
*** 3DLDF-2.0.2/src/pbpvexpr.w	Thu Nov  7 13:36:07 2013
--- 3DLDF-2.0.3/src/pbpvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 1314,1318 ****
  
       if (!(e && p))
!         @=$$@> = 0;
  
       else 
--- 1314,1318 ----
  
       if (!(e && p))
!         @=$$@> = static_cast<void*>(0);
  
       else 
***************
*** 1354,1358 ****
  
       if (!(e && p))
!         @=$$@> = 0;
  
       else 
--- 1354,1358 ----
  
       if (!(e && p))
!         @=$$@> = static_cast<void*>(0);
  
       else 
***************
*** 1439,1443 ****
  
       if (!(c && p))
!         @=$$@> = 0;
  
       else 
--- 1439,1443 ----
  
       if (!(c && p))
!         @=$$@> = static_cast<void*>(0);
  
       else 
***************
*** 1473,1477 ****
  
       if (!(c && p))
!          @=$$@> = 0;
  
       else 
--- 1473,1477 ----
  
       if (!(c && p))
!          @=$$@> = static_cast<void*>(0);
  
       else 
diff -rc2P 3DLDF-2.0.2/src/pbsndecl.w 3DLDF-2.0.3/src/pbsndecl.w
*** 3DLDF-2.0.2/src/pbsndecl.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pbsndecl.w	Mon Nov 11 18:43:06 2013
***************
*** 203,211 ****
  @<Preprocessor macros not only for the parser@>=
  
  #define YYPARSE_PARAM parameter
  #define YYLEX_PARAM parameter
  #define YYLTYPE LDF_LOCATION_TYPE
  #define YYLOC_DEFAULT(Current, Rhs, N) /* Do nothing.  */
! 
  
  @q #if DEBUG_COMPILE @>
--- 203,212 ----
  @<Preprocessor macros not only for the parser@>=
  
+ #if 0 
  #define YYPARSE_PARAM parameter
  #define YYLEX_PARAM parameter
  #define YYLTYPE LDF_LOCATION_TYPE
  #define YYLOC_DEFAULT(Current, Rhs, N) /* Do nothing.  */
! #endif 
  
  @q #if DEBUG_COMPILE @>
***************
*** 223,228 ****
  @<Preprocessor macros for the parser only@>=
  
  #define YYERROR_VERBOSE
! 
  
  
--- 224,230 ----
  @<Preprocessor macros for the parser only@>=
  
+ #if 0 
  #define YYERROR_VERBOSE
! #endif 
  
  
***************
*** 256,262 ****
  @=%debug@>@/
  @q =%expect 1@>@/
! @=%locations@>@/
  @q =%glr-parser@>@/
  @=%pure_parser@>@/
  @=/* %token_table */@>@/ 
  @=%verbose@>
--- 258,266 ----
  @=%debug@>@/
  @q =%expect 1@>@/
! @q =%locations@>@/
  @q =%glr-parser@>@/
  @=%pure_parser@>@/
+ @=%parse-param {yyscan_t parameter}@>@;@/
+ @=%lex-param {yyscan_t parameter}@>@;@/
  @=/* %token_table */@>@/ 
  @=%verbose@>
diff -rc2P 3DLDF-2.0.2/src/pcbvexpr.w 3DLDF-2.0.3/src/pcbvexpr.w
*** 3DLDF-2.0.2/src/pcbvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcbvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcirexpr.w 3DLDF-2.0.3/src/pcirexpr.w
*** 3DLDF-2.0.2/src/pcirexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcirexpr.w	Fri Dec 13 12:16:07 2013
***************
*** 93,97 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 93,97 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 164,173 ****
  @<Define rules@>=
  
!   if (t == 0)
     {
  
        delete s;
  
!       @=$$@> = 0;
  
     } /* |if (t == 0)|  */
--- 164,173 ----
  @<Define rules@>=
  
!   if (t == static_cast<const Circle*>(0))
     {
  
        delete s;
  
!       @=$$@> = static_cast<void*>(0);
  
     } /* |if (t == 0)|  */
***************
*** 250,254 ****
  
     @=$$@> = (c) ?  c->get_circle(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = 0;
  
  };
--- 250,254 ----
  
     @=$$@> = (c) ?  c->get_circle(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 343,352 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 343,352 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Circle>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 364,368 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 364,368 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pclrcmnd.w 3DLDF-2.0.3/src/pclrcmnd.w
*** 3DLDF-2.0.2/src/pclrcmnd.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pclrcmnd.w	Fri Dec 13 12:04:41 2013
***************
*** 80,84 ****
                                   static_cast<Id_Map_Entry_Node>(@=$2@>)); 
  
!    @=$$@> = 0;
  
  };
--- 80,84 ----
                                   static_cast<Id_Map_Entry_Node>(@=$2@>)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 111,117 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
     {
!        @=$$@> = 0;
  
     } /* |if (entry == 0 || entry->object == 0)|  */
--- 111,117 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
     {
!        @=$$@> = static_cast<void*>(0);
  
     } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 129,133 ****
     p->clear_connectors(); 
  
!    @=$$@> = 0;
  
  };
--- 129,133 ----
     p->clear_connectors(); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 156,162 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
     {
!        @=$$@> = 0;
  
     } /* |if (entry == 0 || entry->object == 0)|  */
--- 156,162 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
     {
!        @=$$@> = static_cast<void*>(0);
  
     } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 174,178 ****
     entry->object = 0;
  
!    @=$$@> = 0;
  
  };
--- 174,178 ----
     entry->object = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 200,206 ****
  @<Define rules@>=
  
!   if (entry == 0) 
     {
!        @=$$@> = 0;
  
     } /* |if (entry == 0 || entry->object == 0)|  */
--- 200,206 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0)) 
     {
!        @=$$@> = static_cast<void*>(0);
  
     } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 222,226 ****
        static_cast<Picture*>(entry->object)->clear(); 
  
!    @=$$@> = 0;
  
  };
--- 222,226 ----
        static_cast<Picture*>(entry->object)->clear(); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 243,247 ****
      delete static_cast<Transform*>(entry->object);
      entry->object = 0;
!     @=$$@> = 0;
  };
  
--- 243,247 ----
      delete static_cast<Transform*>(entry->object);
      entry->object = 0;
!     @=$$@> = static_cast<void*>(0);
  };
  
diff -rc2P 3DLDF-2.0.2/src/pclvexpr.w 3DLDF-2.0.3/src/pclvexpr.w
*** 3DLDF-2.0.2/src/pclvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pclvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!         @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!         @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcnvexpr.w 3DLDF-2.0.3/src/pcnvexpr.w
*** 3DLDF-2.0.2/src/pcnvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcnvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcolexpr.w 3DLDF-2.0.3/src/pcolexpr.w
*** 3DLDF-2.0.2/src/pcolexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcolexpr.w	Fri Dec 13 12:18:45 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 157,166 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 157,166 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Color>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 177,181 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 177,181 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 235,241 ****
  @<Define rules@>=
  
!    if (c == 0)
        {
!           @=$$@> = 0;
  
        }  /* |if (c == 0)|  */
--- 235,241 ----
  @<Define rules@>=
  
!    if (c == static_cast<Color*>(0))
        {
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (c == 0)|  */
***************
*** 268,272 ****
  @<Define rules@>=
  
!          if (r == 0)
              {
  
--- 268,272 ----
  @<Define rules@>=
  
!          if (r == ZERO_REAL)
              {
  
***************
*** 291,295 ****
                  c = 0;
  
!                 @=$$@> = 0;
  
  
--- 291,295 ----
                  c = 0;
  
!                 @=$$@> = static_cast<void*>(0);
  
  
***************
*** 378,385 ****
  @<Define rules@>=
  
!    if (c == 0)
        {
  
!           @=$$@> = 0;
  
        }  /* |if (c == 0)|  */
--- 378,385 ----
  @<Define rules@>=
  
!    if (c == static_cast<Color*>(0))
        {
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (c == 0)|  */
***************
*** 431,437 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
!           @=$$@> = 0;
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
--- 431,437 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 510,514 ****
  @q **** (4) @>   
  
!    if (c == 0 || d == 0)
        {
  
--- 510,514 ----
  @q **** (4) @>   
  
!    if (c == static_cast<Color*>(0) || d == static_cast<Color*>(0))
        {
  
***************
*** 516,523 ****
            delete d;
  
!           c = 0;
!           d = 0;
  
!           @=$$@> = 0;
  
        }  /* |if (c == 0 || d == 0)|  */
--- 516,523 ----
            delete d;
  
!           c = static_cast<Color*>(0);
!           d = static_cast<Color*>(0);
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (c == 0 || d == 0)|  */
***************
*** 568,580 ****
  @q **** (4) @>   
  
!    if (c == 0 || d == 0)
        {
            delete c;
            delete d;
  
!           c = 0;
!           d = 0;
  
!           @=$$@> = 0;
  
        }  /* |if (c == 0 || d == 0)|  */
--- 568,580 ----
  @q **** (4) @>   
  
!    if (c == static_cast<Color*>(0) || d == static_cast<Color*>(0))
        {
            delete c;
            delete d;
  
!           c = static_cast<Color*>(0);
!           d = static_cast<Color*>(0);
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (c == 0 || d == 0)|  */
***************
*** 598,602 ****
  
                 delete d;
!                d = 0;
  };
  
--- 598,602 ----
  
                 delete d;
!                d = static_cast<Color*>(0);
  };
  
diff -rc2P 3DLDF-2.0.2/src/pcommand.w 3DLDF-2.0.3/src/pcommand.w
*** 3DLDF-2.0.2/src/pcommand.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcommand.w	Fri Dec 13 12:19:25 2013
***************
*** 127,131 ****
     clip_to_func(@=$2@>, parameter);
  
!    @=$$@> = 0;
  
  };
--- 127,131 ----
     clip_to_func(@=$2@>, parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 226,230 ****
  
      Scan_Parse::message_command_func(@=$1@>, @=$2@>, parameter);
!     @=$$@> = 0;
  };
  
--- 226,230 ----
  
      Scan_Parse::message_command_func(@=$1@>, @=$2@>, parameter);
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 252,256 ****
      cerr_mutex.unlock();  
  
!     @=$$@> = 0;
  };
  
--- 252,256 ----
      cerr_mutex.unlock();  
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 271,278 ****
     string* str_ptr = static_cast<string*>(@=$2@>); 
  
!    if (str_ptr == 0)
       {
       
!          @=$$@> = 0;
  
      }  /* |if (str_ptr == 0)|  */
--- 271,278 ----
     string* str_ptr = static_cast<string*>(@=$2@>); 
  
!    if (str_ptr == static_cast<string*>(0))
       {
       
!          @=$$@> = static_cast<void*>(0);
  
      }  /* |if (str_ptr == 0)|  */
***************
*** 300,304 ****
            static_cast<Scanner_Node>(parameter)->in = curr_input_struct;
  
!           @=$$@> = 0;
  
        }   /* |else| (|str_ptr != 0|)  */
--- 300,304 ----
            static_cast<Scanner_Node>(parameter)->in = curr_input_struct;
  
!           @=$$@> = static_cast<void*>(0);
  
        }   /* |else| (|str_ptr != 0|)  */
***************
*** 330,336 ****
  @<Define rules@>=
  
!    if (s == 0)
        {
!           @=$$@> = 0;
  
        } /* |s == 0|  */
--- 330,336 ----
  @<Define rules@>=
  
!    if (s == static_cast<string*>(0))
        {
!           @=$$@> = static_cast<void*>(0);
  
        } /* |s == 0|  */
***************
*** 377,381 ****
            delete s;
  
!           @=$$@> = 0;
  
  @q ***** (5).@> 
--- 377,381 ----
            delete s;
  
!           @=$$@> = static_cast<void*>(0);
  
  @q ***** (5).@> 
diff -rc2P 3DLDF-2.0.2/src/pcondit.w 3DLDF-2.0.3/src/pcondit.w
*** 3DLDF-2.0.2/src/pcondit.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcondit.w	Mon Nov 11 18:43:06 2013
***************
*** 368,381 ****
    @<Common declarations for rules@>@; 
    
!   if (scanner_node->in->type == Io_Struct::FILE_TYPE)
!     {
!       location_strm << scanner_node->in->filename << ": "
!                     << @=@@1@>@=.first_line@> << ":" << @=@@1@>@=.first_column@>
!                     << "--"
!                     << @=@@1@>@=.last_line@> << ":" << @=@@1@>@=.last_column@>;
!     }
! 
    else
      location_strm.str("");
  
  @q ****** (6).@> 
--- 368,382 ----
    @<Common declarations for rules@>@; 
    
! #if 0 
! @q  if (scanner_node->in->type == Io_Struct::FILE_TYPE)                                    @>
! @q    {                                                                                    @>
! @q      location_strm << scanner_node->in->filename << ": "                                @>
! @q                    << @@=@@1@@>@@=.first_line@@> << ":" << @@=@@1@@>@@=.first_column@@> @>
! @q                    << "--"                                                              @>
! @q                    << @@=@@1@@>@@=.last_line@@> << ":" << @@=@@1@@>@@=.last_column@@>;  @>
! @q    } @>
    else
      location_strm.str("");
+ #endif 
  
  @q ****** (6).@> 
diff -rc2P 3DLDF-2.0.2/src/pconexpr.w 3DLDF-2.0.3/src/pconexpr.w
*** 3DLDF-2.0.2/src/pconexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pconexpr.w	Fri Dec 13 12:22:56 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Cone>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 176,180 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 176,180 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcrclslc.w 3DLDF-2.0.3/src/pcrclslc.w
*** 3DLDF-2.0.2/src/pcrclslc.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcrclslc.w	Fri Dec 13 12:04:41 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
diff -rc2P 3DLDF-2.0.2/src/pcrvexpr.w 3DLDF-2.0.3/src/pcrvexpr.w
*** 3DLDF-2.0.2/src/pcrvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcrvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 243,247 ****
       {
         
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 243,247 ----
       {
         
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pctfncs0.web 3DLDF-2.0.3/src/pctfncs0.web
*** 3DLDF-2.0.2/src/pctfncs0.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/pctfncs0.web	Fri Dec 13 12:25:12 2013
***************
*** 774,778 ****
  @q ********* (9) @> 
  
!                          if (ivp.v == 0)
                              {
  
--- 774,778 ----
  @q ********* (9) @> 
  
!                          if (ivp.v == static_cast<void*>(0))
                              {
  
***************
*** 800,804 ****
  @q ********** (10) @>
  
!                                 if (pv == 0 || pv->ctr <= 0)
                                     {
  #if DEBUG_COMPILE
--- 800,805 ----
  @q ********** (10) @>
  
!                                 if (   pv == static_cast<Pointer_Vector<Shape>*>(0)  
!                                     || pv->ctr <= 0)
                                     {
  #if DEBUG_COMPILE
***************
*** 1083,1088 ****
  
            else if (status == 0)
!              {
!              }  /* |if (status == 0)| */
  
  
--- 1084,1088 ----
  
            else if (status == 0)
!              ;  /* Do nothing  */
  
  
diff -rc2P 3DLDF-2.0.2/src/pcubexpr.w 3DLDF-2.0.3/src/pcubexpr.w
*** 3DLDF-2.0.2/src/pcubexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcubexpr.w	Fri Dec 13 12:25:58 2013
***************
*** 93,97 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 93,97 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 194,202 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 194,202 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Cuboid>*>(0))
        {
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 214,218 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 214,218 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcylexpr.w 3DLDF-2.0.3/src/pcylexpr.w
*** 3DLDF-2.0.2/src/pcylexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcylexpr.w	Fri Dec 13 12:40:36 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 159,167 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 159,167 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Cylinder>*>(0))
        {
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 178,182 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 178,182 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pcyvexpr.w 3DLDF-2.0.3/src/pcyvexpr.w
*** 3DLDF-2.0.2/src/pcyvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pcyvexpr.w	Fri Dec 13 12:04:41 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pdpvexpr.w 3DLDF-2.0.3/src/pdpvexpr.w
*** 3DLDF-2.0.2/src/pdpvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pdpvexpr.w	Fri Dec 13 12:04:40 2013
***************
*** 96,108 ****
  @q **** (4) Error handling:  |entry == 0 || entry->object == 0|.@> 
  
! @ Error handling:  |entry == 0 || entry->object == 0|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 96,108 ----
  @q **** (4) Error handling:  |entry == 0 || entry->object == 0|.@> 
  
! @ Error handling:  |entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == 0|.
  \initials{LDF 2005.01.13.}
  
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pdrwcmnd.w 3DLDF-2.0.3/src/pdrwcmnd.w
*** 3DLDF-2.0.2/src/pdrwcmnd.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pdrwcmnd.w	Fri Dec 13 12:58:20 2013
***************
*** 399,403 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 399,403 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 427,431 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 427,431 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 455,459 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 455,459 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 483,487 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 483,487 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 511,515 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 511,515 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 539,543 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 539,543 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 567,571 ****
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 567,571 ----
                                  static_cast<Pointer_Vector<Path>*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 606,610 ****
  
  
!   @=$$@> = 0;
  
  };
--- 606,610 ----
  
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 634,638 ****
  
  
!   @=$$@> = 0;
  
  };
--- 634,638 ----
  
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 662,666 ****
  
  
!   @=$$@> = 0;
  
  };
--- 662,666 ----
  
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 690,694 ****
  
  
!   @=$$@> = 0;
  
  };
--- 690,694 ----
  
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 718,722 ****
                                         static_cast<Sphere_Development*>(@=$2@>));
  
!     @=$$@> = 0;
  
  };
--- 718,722 ----
                                         static_cast<Sphere_Development*>(@=$2@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 747,751 ****
  
  
!     @=$$@> = 0;
  
  };
--- 747,751 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 776,780 ****
  
  
!     @=$$@> = 0;
  
  };
--- 776,780 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 813,817 ****
  {
  
!     if (@=$2@> != 0)
      {
          Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
--- 813,817 ----
  {
  
!     if (@=$2@> != static_cast<void*>(0))
      {
          Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
***************
*** 820,824 ****
      }
  
!     @=$$@> = 0;
  
  };
--- 820,824 ----
      }
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1017,1021 ****
                                   static_cast<Point*>(@=$2@>));
  
!      @=$$@> = 0;
  
  };
--- 1017,1021 ----
                                   static_cast<Point*>(@=$2@>));
  
!      @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1053,1062 ****
  @<Define rules@>=
  
!   if (bp == 0 || bp->pt == INVALID_POINT)
!     {
!       
! 
!     } /* |if (bp == 0 || bp->pt == INVALID_POINT)|  */
! 
  
  @q ***** (5) |bp != 0 && bp->pt != INVALID_POINT|.@>   
--- 1053,1058 ----
  @<Define rules@>=
  
!   if (bp == static_cast<Bool_Point*>(0) || bp->pt == INVALID_POINT)
!      ;       /* Do nothing  */
  
  @q ***** (5) |bp != 0 && bp->pt != INVALID_POINT|.@>   
***************
*** 1086,1090 ****
      delete bp;
  
!     @=$$@> = 0;
  
  };
--- 1082,1086 ----
      delete bp;
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1193,1197 ****
     delete bp;
  
!    @=$$@> = 0;
  
  };
--- 1189,1193 ----
     delete bp;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1226,1230 ****
      {
        cerr << "\n*** Parser: drawdot_or_undrawdot --> DRAWDOT."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@;
--- 1222,1226 ----
      {
        cerr << "\n*** Parser: drawdot_or_undrawdot --> DRAWDOT."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@;
***************
*** 1252,1256 ****
      {
        cerr << "\n*** Parser: drawdot_or_undrawdot --> UNDRAWDOT."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@;
--- 1248,1252 ----
      {
        cerr << "\n*** Parser: drawdot_or_undrawdot --> UNDRAWDOT."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@;
***************
*** 1365,1369 ****
  #endif /* |DEBUG_COMPILE|  */@;
  
!   @=$$@> = 0;
  
  }
--- 1361,1365 ----
  #endif /* |DEBUG_COMPILE|  */@;
  
!   @=$$@> = static_cast<void*>(0);
  
  }
***************
*** 1381,1385 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 1377,1381 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1418,1422 ****
    static_cast<Scanner_Node>(parameter)->color_vector_ptr = entry->object;
  
!   @=$$@> = 0;
  
  };
--- 1414,1418 ----
    static_cast<Scanner_Node>(parameter)->color_vector_ptr = entry->object;
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1448,1452 ****
    static_cast<Scanner_Node>(parameter)->draw_color_vector_ptr = entry->object;
  
!   @=$$@> = 0;
  
  };
--- 1444,1448 ----
    static_cast<Scanner_Node>(parameter)->draw_color_vector_ptr = entry->object;
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1481,1485 ****
    static_cast<Scanner_Node>(parameter)->fill_color_vector_ptr = entry->object;
  
!   @=$$@> = 0;
  
  };
--- 1477,1481 ----
    static_cast<Scanner_Node>(parameter)->fill_color_vector_ptr = entry->object;
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1692,1696 ****
  @<Define rules@>=
  
!    if (p == 0)
       {
  #if 0 
--- 1688,1692 ----
  @<Define rules@>=
  
!    if (p == static_cast<Pen*>(0))
       {
  #if 0 
***************
*** 1729,1733 ****
  
  @<Define rules@>=
!          if (q == 0)
              {
  
--- 1725,1729 ----
  
  @<Define rules@>=
!          if (q == static_cast<Pen*>(0))
              {
  
***************
*** 1748,1752 ****
  
  
!    @=$$@> = 0;
  
  };
--- 1744,1748 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1795,1799 ****
         } /* |if (status != 0)|  */
  
!     @=$$@> = 0;
  
  };
--- 1791,1795 ----
         } /* |if (status != 0)|  */
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1841,1845 ****
         } /* |if (status != 0)|  */
  
!     @=$$@> = 0;
  
  };
--- 1837,1841 ----
         } /* |if (status != 0)|  */
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1883,1887 ****
         } /* |if (status != 0)|  */
  
!     @=$$@> = 0;
  
  };
--- 1879,1883 ----
         } /* |if (status != 0)|  */
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1933,1937 ****
         } /* |if (status != 0)|  */
  
!     @=$$@> = 0;
  
  };
--- 1929,1933 ----
         } /* |if (status != 0)|  */
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1964,1968 ****
                       "scanner_node->current_pen");
  
!    @=$$@> = 0;
  
  
--- 1960,1964 ----
                       "scanner_node->current_pen");
  
!    @=$$@> = static_cast<void*>(0);
  
  
***************
*** 1995,1999 ****
                         "scanner_node->current_color");
  
!    @=$$@> = 0;
  
  };
--- 1991,1995 ----
                         "scanner_node->current_color");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2025,2029 ****
                         "scanner_node->current_draw_color");
  
!    @=$$@> = 0;
  
  };
--- 2021,2025 ----
                         "scanner_node->current_draw_color");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2056,2060 ****
  
  
!    @=$$@> = 0;
  
  };
--- 2052,2056 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2088,2092 ****
  
  
!    @=$$@> = 0;
  
  };
--- 2084,2088 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2133,2137 ****
  
  
!    @=$$@> = 0;
  
  };
--- 2129,2133 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pdshexpr.w 3DLDF-2.0.3/src/pdshexpr.w
*** 3DLDF-2.0.2/src/pdshexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pdshexpr.w	Fri Dec 13 12:43:59 2013
***************
*** 83,87 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 83,87 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 161,170 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 161,170 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        {
  
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 182,186 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 182,186 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pedvexpr.w 3DLDF-2.0.3/src/pedvexpr.w
*** 3DLDF-2.0.2/src/pedvexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pedvexpr.w	Fri Dec 13 12:04:39 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/peldexpr.w 3DLDF-2.0.3/src/peldexpr.w
*** 3DLDF-2.0.2/src/peldexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/peldexpr.w	Fri Dec 13 12:45:54 2013
***************
*** 89,98 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
!     {
  
        @=$$@> = static_cast<void*>(0);
  
!     } /* |if (entry == 0 || entry->object == 0)|  */
  
    else /* |entry != 0 && entry->object != 0|  */
--- 89,98 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
!   {
  
        @=$$@> = static_cast<void*>(0);
  
!   } /* |if (entry == 0 || entry->object == 0)|  */
  
    else /* |entry != 0 && entry->object != 0|  */
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Ellipsoid>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 176,180 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 176,180 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pellexpr.w 3DLDF-2.0.3/src/pellexpr.w
*** 3DLDF-2.0.2/src/pellexpr.w	Thu Nov  7 13:36:06 2013
--- 3DLDF-2.0.3/src/pellexpr.w	Fri Dec 13 12:59:30 2013
***************
*** 92,96 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 92,96 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 190,198 ****
  
  
!   if (t == 0)
     {
        delete s;
  
!       @=$$@> = 0;
  
     } /* |if (t == 0)|  */
--- 190,198 ----
  
  
!   if (t == static_cast<const Ellipse*>(0))
     {
        delete s;
  
!       @=$$@> = static_cast<void*>(0);
  
     } /* |if (t == 0)|  */
***************
*** 277,281 ****
  
     @=$$@> = (c) ?  c->get_ellipse(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = 0;
  
  };
--- 277,281 ----
  
     @=$$@> = (c) ?  c->get_ellipse(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 379,388 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 379,388 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Ellipse>*>(0))
        {
  
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 400,404 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 400,404 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pellpslc.w 3DLDF-2.0.3/src/pellpslc.w
*** 3DLDF-2.0.2/src/pellpslc.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pellpslc.w	Fri Dec 13 11:59:36 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
diff -rc2P 3DLDF-2.0.2/src/pelvexpr.w 3DLDF-2.0.3/src/pelvexpr.w
*** 3DLDF-2.0.2/src/pelvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pelvexpr.w	Fri Dec 13 11:59:36 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 308,312 ****
    if (status != 0)
       {
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 308,312 ----
    if (status != 0)
       {
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pens.web 3DLDF-2.0.3/src/pens.web
*** 3DLDF-2.0.2/src/pens.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/pens.web	Wed Dec 11 18:42:22 2013
***************
*** 349,354 ****
      {
        cerr << "ERROR! In Pen::show():\n"
!            << "Invalid `type': " << type << endl
!            << flush;
  
        return_value = false;
--- 349,353 ----
      {
        cerr << "ERROR! In Pen::show():\n"
!            << "Invalid `type': " << type << endl;
  
        return_value = false;
diff -rc2P 3DLDF-2.0.2/src/pfcvexpr.w 3DLDF-2.0.3/src/pfcvexpr.w
*** 3DLDF-2.0.2/src/pfcvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pfcvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 292,296 ****
         {
  
!          @=$$@> = 0;
  
         } /* |if (status != 0)|  */
--- 292,296 ----
         {
  
!          @=$$@> = static_cast<void*>(0);
  
         } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pfgopcmd.w 3DLDF-2.0.3/src/pfgopcmd.w
*** 3DLDF-2.0.2/src/pfgopcmd.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pfgopcmd.w	Fri Dec 13 13:03:30 2013
***************
*** 91,95 ****
     Scan_Parse::beginfig_func(scanner_node, i);
  
!    @=$$@> = 0;
  
  };
--- 91,95 ----
     Scan_Parse::beginfig_func(scanner_node, i);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 171,175 ****
    Scan_Parse::output_command_func(scanner_node);
  
!   @=$$@> = 0;
   
  };
--- 171,175 ----
    Scan_Parse::output_command_func(scanner_node);
  
!   @=$$@> = static_cast<void*>(0);
   
  };
***************
*** 197,201 ****
     delete s;
  
!    @=$$@> = 0;
  
  };
--- 197,201 ----
     delete s;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 228,232 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 228,232 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 264,268 ****
  {
  
!   @=$$@> = 0;
   
  };
--- 264,268 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
   
  };
***************
*** 314,318 ****
      Scan_Parse::output_command_func(scanner_node);
  
!     @=$$@> = 0;
  
  };
--- 314,318 ----
      Scan_Parse::output_command_func(scanner_node);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 343,347 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 343,347 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 362,366 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 362,366 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 395,399 ****
      bool* b;
  
!     if (scanner_node->clear_ptr == 0)
        b = new bool;
  
--- 395,399 ----
      bool* b;
  
!     if (scanner_node->clear_ptr == static_cast<void*>(0))
        b = new bool;
  
***************
*** 420,424 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->focus_ptr != 0)
        delete static_cast<Focus*>(scanner_node->focus_ptr);
  
--- 420,424 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->focus_ptr != static_cast<void*>(0))
        delete static_cast<Focus*>(scanner_node->focus_ptr);
  
***************
*** 448,452 ****
      *i = @=$2@>;
  
!     if (scanner_node->projection_ptr != 0)
        delete static_cast<int*>(scanner_node->projection_ptr);
  
--- 448,452 ----
      *i = @=$2@>;
  
!     if (scanner_node->projection_ptr != static_cast<void*>(0))
        delete static_cast<int*>(scanner_node->projection_ptr);
  
***************
*** 477,481 ****
    real* r;
  
!   if (scanner_node->factor_ptr != 0)
       r = static_cast<real*>(scanner_node->factor_ptr); 
    else 
--- 477,481 ----
    real* r;
  
!   if (scanner_node->factor_ptr != static_cast<void*>(0))
       r = static_cast<real*>(scanner_node->factor_ptr); 
    else 
***************
*** 536,540 ****
      *i = Sorting::MAX_Z;
  
!     if (scanner_node->sort_value_ptr != 0)
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
--- 536,540 ----
      *i = Sorting::MAX_Z;
  
!     if (scanner_node->sort_value_ptr != static_cast<void*>(0))
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
***************
*** 561,565 ****
      *i = Sorting::MIN_Z;
  
!     if (scanner_node->sort_value_ptr != 0)
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
--- 561,565 ----
      *i = Sorting::MIN_Z;
  
!     if (scanner_node->sort_value_ptr != static_cast<void*>(0))
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
***************
*** 586,590 ****
     *i = Sorting::MEAN_Z;
  
!    if (scanner_node->sort_value_ptr != 0)
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
--- 586,590 ----
     *i = Sorting::MEAN_Z;
  
!    if (scanner_node->sort_value_ptr != static_cast<void*>(0))
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
***************
*** 611,615 ****
      *i = Sorting::SUPPRESS_SORT;
  
!     if (scanner_node->sort_value_ptr != 0)
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
--- 611,615 ----
      *i = Sorting::SUPPRESS_SORT;
  
!     if (scanner_node->sort_value_ptr != static_cast<void*>(0))
        delete static_cast<int*>(scanner_node->sort_value_ptr);
  
***************
*** 670,674 ****
      real* r;
  
!     if (scanner_node->factor_ptr != 0)
         r = static_cast<real*>(scanner_node->min_x_proj_ptr); 
      else 
--- 670,674 ----
      real* r;
  
!     if (scanner_node->factor_ptr != static_cast<void*>(0))
         r = static_cast<real*>(scanner_node->min_x_proj_ptr); 
      else 
***************
*** 707,711 ****
      real* r;
  
!     if (scanner_node->factor_ptr != 0)
         r = static_cast<real*>(scanner_node->max_x_proj_ptr); 
      else 
--- 707,711 ----
      real* r;
  
!     if (scanner_node->factor_ptr != static_cast<void*>(0))
         r = static_cast<real*>(scanner_node->max_x_proj_ptr); 
      else 
***************
*** 740,744 ****
    real* r;
  
!   if (scanner_node->factor_ptr != 0)
       r = static_cast<real*>(scanner_node->min_y_proj_ptr); 
    else 
--- 740,744 ----
    real* r;
  
!   if (scanner_node->factor_ptr != static_cast<void*>(0))
       r = static_cast<real*>(scanner_node->min_y_proj_ptr); 
    else 
***************
*** 775,779 ****
    real* r;
  
!   if (scanner_node->factor_ptr != 0)
       r = static_cast<real*>(scanner_node->max_y_proj_ptr); 
    else 
--- 775,779 ----
    real* r;
  
!   if (scanner_node->factor_ptr != static_cast<void*>(0))
       r = static_cast<real*>(scanner_node->max_y_proj_ptr); 
    else 
***************
*** 808,812 ****
    real* r;
  
!   if (scanner_node->factor_ptr != 0)
       r = static_cast<real*>(scanner_node->min_z_proj_ptr); 
    else 
--- 808,812 ----
    real* r;
  
!   if (scanner_node->factor_ptr != static_cast<void*>(0))
       r = static_cast<real*>(scanner_node->min_z_proj_ptr); 
    else 
***************
*** 841,845 ****
    real* r;
  
!   if (scanner_node->factor_ptr != 0)
       r = static_cast<real*>(scanner_node->max_z_proj_ptr); 
    else 
--- 841,845 ----
    real* r;
  
!   if (scanner_node->factor_ptr != static_cast<void*>(0))
       r = static_cast<real*>(scanner_node->max_z_proj_ptr); 
    else 
***************
*** 1026,1035 ****
     real* r;
  
!    if (scanner_node->surface_hiding_value_ptr != 0)
        {
           r = static_cast<real*>(scanner_node->surface_hiding_value_ptr);           
        }
  
!    else  /* |scanner_node->surface_hiding_value_ptr == 0|  */
        {
  
--- 1026,1035 ----
     real* r;
  
!    if (scanner_node->surface_hiding_value_ptr != static_cast<void*>(0))
        {
           r = static_cast<real*>(scanner_node->surface_hiding_value_ptr);           
        }
  
!    else  /* |scanner_node->surface_hiding_value_ptr == static_cast<void*>(0)|  */
        {
  
***************
*** 1060,1064 ****
     real* r;
  
!    if (scanner_node->surface_hiding_value_ptr != 0)
        {
           r = static_cast<real*>(scanner_node->surface_hiding_value_ptr);           
--- 1060,1064 ----
     real* r;
  
!    if (scanner_node->surface_hiding_value_ptr != static_cast<void*>(0))
        {
           r = static_cast<real*>(scanner_node->surface_hiding_value_ptr);           
diff -rc2P 3DLDF-2.0.2/src/pfocexpr.w 3DLDF-2.0.3/src/pfocexpr.w
*** 3DLDF-2.0.2/src/pfocexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pfocexpr.w	Fri Dec 13 12:51:32 2013
***************
*** 84,88 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 84,88 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 145,154 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 145,154 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Focus>*>(0))
        {
  
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 166,170 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 166,170 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pfuncfin.w 3DLDF-2.0.3/src/pfuncfin.w
*** 3DLDF-2.0.2/src/pfuncfin.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pfuncfin.w	Wed Dec 11 18:42:22 2013
***************
*** 75,81 ****
  int
  yylex(YYSTYPE* value,
!       YYLTYPE* location,
!       void* parameter);  
  
  
  @q ** yyerror() @>
--- 75,83 ----
  int
  yylex(YYSTYPE* value,
!       yyscan_t parameter);  
  
+ #if 0 
+       YYLTYPE* location,
+ #endif 
  
  @q ** yyerror() @>
***************
*** 83,94 ****
  @<Declare functions@>=
  int
! yyerror(char const* message);@/
  
  @
  @<Define functions@>=
  int
! yyerror(char const* message)
  {
!   cerr << "ERROR! In yyparse(): " << message << endl << flush;
    return 0;
  }
--- 85,96 ----
  @<Declare functions@>=
  int
! yyerror(void *v, char const* message);@/
  
  @
  @<Define functions@>=
  int
! yyerror(void *v, char const* message)
  {
!   cerr << "ERROR! In yyparse(): " << message << endl;
    return 0;
  }
***************
*** 183,187 ****
  @<Include files@>@;
  @<Using declarations@>@;
! @<Declare location type@>@;
  @<Preprocessor macros not only for the parser@>@;
  @<Preprocessor macros for the parser only@>@;
--- 185,190 ----
  @<Include files@>@;
  @<Using declarations@>@;
! typedef void* yyscan_t;
! @q Declare location type @>
  @<Preprocessor macros not only for the parser@>@;
  @<Preprocessor macros for the parser only@>@;
***************
*** 202,206 ****
  @=%%@> /* Introduces ``Additional C++ code'' section.  
            \initials{LDF 2004.04.07}.  */
! @<Define |LDF_LOCATION_TYPE| functions@>@;
  @<Define functions@>@;
  
--- 205,209 ----
  @=%%@> /* Introduces ``Additional C++ code'' section.  
            \initials{LDF 2004.04.07}.  */
! @q <Define |LDF_LOCATION_TYPE| functions@>
  @<Define functions@>@;
  
***************
*** 230,234 ****
  
  #undef YYLTYPE
! @<Declare location type@>@;
  @<Preprocessor macros not only for the parser@>@;
  @<|extern| declarations in |namespace Scan_Parse|@>@;
--- 233,238 ----
  
  #undef YYLTYPE
! typedef void* yyscan_t;
! @q <Declare location type @>
  @<Preprocessor macros not only for the parser@>@;
  @<|extern| declarations in |namespace Scan_Parse|@>@;
diff -rc2P 3DLDF-2.0.2/src/pglvexpr.w 3DLDF-2.0.3/src/pglvexpr.w
*** 3DLDF-2.0.2/src/pglvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pglvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pglyexpr.w 3DLDF-2.0.3/src/pglyexpr.w
*** 3DLDF-2.0.2/src/pglyexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pglyexpr.w	Fri Dec 13 12:51:32 2013
***************
*** 89,93 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 89,93 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 157,165 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 157,165 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Glyph>*>(0))
        {
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 177,181 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 177,181 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pgrpcmnd.w 3DLDF-2.0.3/src/pgrpcmnd.w
*** 3DLDF-2.0.2/src/pgrpcmnd.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pgrpcmnd.w	Thu Dec 12 14:49:08 2013
***************
*** 249,253 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 249,253 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/phlxexpr.w 3DLDF-2.0.3/src/phlxexpr.w
*** 3DLDF-2.0.2/src/phlxexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/phlxexpr.w	Fri Dec 13 12:51:32 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Helix>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 176,180 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 176,180 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/phpvexpr.w 3DLDF-2.0.3/src/phpvexpr.w
*** 3DLDF-2.0.2/src/phpvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/phpvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 115,119 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 115,119 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 132,136 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 132,136 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/phxvexpr.w 3DLDF-2.0.3/src/phxvexpr.w
*** 3DLDF-2.0.2/src/phxvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/phxvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/phypexpr.w 3DLDF-2.0.3/src/phypexpr.w
*** 3DLDF-2.0.2/src/phypexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/phypexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Hyperbola>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 175,179 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 175,179 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 241,245 ****
  
     @=$$@> = (c) ?  c->get_hyperbola(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = 0;
  
  };
--- 241,245 ----
  
     @=$$@> = (c) ?  c->get_hyperbola(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pictures.web 3DLDF-2.0.3/src/pictures.web
*** 3DLDF-2.0.2/src/pictures.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/pictures.web	Wed Dec 11 18:42:22 2013
***************
*** 476,480 ****
    if (DEBUG) 
      cerr << "Entering `Picture::~Picture()'."
!          << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 476,480 ----
    if (DEBUG) 
      cerr << "Entering `Picture::~Picture()'."
!          << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
diff -rc2P 3DLDF-2.0.2/src/pinptcmd.w 3DLDF-2.0.3/src/pinptcmd.w
*** 3DLDF-2.0.2/src/pinptcmd.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pinptcmd.w	Fri Dec 13 13:04:26 2013
***************
*** 103,107 ****
  @<Define rules@>=
  
!   if (s == 0 || s->size() == 0)
      {
  
--- 103,107 ----
  @<Define rules@>=
  
!   if (s == static_cast<string*>(0) || s->size() == 0)
      {
  
***************
*** 219,223 ****
  @<Define rules@>=
  
!   if (s != 0)
      delete s;
  
--- 219,223 ----
  @<Define rules@>=
  
!   if (s != static_cast<string*>(0))
      delete s;
  
diff -rc2P 3DLDF-2.0.2/src/planes.web 3DLDF-2.0.3/src/planes.web
*** 3DLDF-2.0.2/src/planes.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/planes.web	Fri Dec 13 13:05:47 2013
***************
*** 243,247 ****
        {
            cerr << "WARNING! In Plane():\nnormal == origin_pt. "
!             << "Plane is INVALID_PLANE.\n\n" << flush;
            point = INVALID_POINT;
            distance = INVALID_REAL;
--- 243,247 ----
        {
            cerr << "WARNING! In Plane():\nnormal == origin_pt. "
!             << "Plane is INVALID_PLANE.\n\n";
            point = INVALID_POINT;
            distance = INVALID_REAL;
***************
*** 730,734 ****
  
  
!    if (reflection == 0)
       {
          cerr_strm << thread_name 
--- 730,734 ----
  
  
!    if (reflection == static_cast<Point*>(0))
       {
          cerr_strm << thread_name 
***************
*** 955,959 ****
  @<Define |Point| functions@>=
    
!   if (pv == 0)
       {
  
--- 955,959 ----
  @<Define |Point| functions@>=
    
!   if (pv == static_cast<Pointer_Vector<Point>*>(0))
       {
  
***************
*** 1032,1036 ****
  @<Define |Point| functions@>=
    
!   if (reflection == 0)
       {
  
--- 1032,1036 ----
  @<Define |Point| functions@>=
    
!   if (reflection == static_cast<Point*>(0))
       {
  
***************
*** 1153,1157 ****
  
  
!    if (rs.first == 0)
       {
          cerr_strm << thread_name << "ERROR! In `Point::reflect_off()':"
--- 1153,1157 ----
  
  
!    if (rs.first == ZERO_REAL)
       {
          cerr_strm << thread_name << "ERROR! In `Point::reflect_off()':"
***************
*** 1364,1368 ****
  @<Define |Plane| functions@>=
  
!   if (denominator == 0)  
      {
           if (!suppress_warnings)  
--- 1364,1368 ----
  @<Define |Plane| functions@>=
  
!   if (denominator == ZERO_REAL)  
      {
           if (!suppress_warnings)  
***************
*** 1556,1560 ****
    real vz = direction_vector.get_z();
  
!   if (direction_vector.get_x() != 0)
      {
        x = 0;
--- 1556,1560 ----
    real vz = direction_vector.get_z();
  
!   if (direction_vector.get_x() != ZERO_REAL)
      {
        x = 0;
***************
*** 1562,1566 ****
        z = (d*my - e*ny) / vx;
      }
!   else if (direction_vector.get_y() != 0)
      {
        x = (d * mz - e * nz) / vy;
--- 1562,1566 ----
        z = (d*my - e*ny) / vx;
      }
!   else if (direction_vector.get_y() != ZERO_REAL)
      {
        x = (d * mz - e * nz) / vy;
***************
*** 1605,1609 ****
    if (*this == INVALID_PLANE)
      {
!       cerr << "INVALID_PLANE. Can't show." << endl << endl << flush;
        return;
      }
--- 1605,1609 ----
    if (*this == INVALID_PLANE)
      {
!       cerr << "INVALID_PLANE. Can't show." << endl << endl;
        return;
      }
***************
*** 1611,1615 ****
    normal.show("normal:");
    point.show("point:");
!   cerr << "distance == " << distance << endl << endl << flush;
  
  }
--- 1611,1615 ----
    normal.show("normal:");
    point.show("point:");
!   cerr << "distance == " << distance << endl << endl;
  
  }
diff -rc2P 3DLDF-2.0.2/src/plblcmnd.w 3DLDF-2.0.3/src/plblcmnd.w
*** 3DLDF-2.0.2/src/plblcmnd.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/plblcmnd.w	Fri Dec 13 13:06:26 2013
***************
*** 908,912 ****
    p->suppress_labels();
  
!   @=$$@> = 0;
  
  };
--- 908,912 ----
    p->suppress_labels();
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 942,946 ****
    p->unsuppress_labels();
  
!   @=$$@> = 0;
  
  };
--- 942,946 ----
    p->unsuppress_labels();
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 971,975 ****
    p->kill_labels();
  
!   @=$$@> = 0;
  
  };
--- 971,975 ----
    p->kill_labels();
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1407,1411 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 1407,1411 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1461,1465 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 1461,1465 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1517,1521 ****
  {
  
!   @=$$@> = 0;
  
  };
--- 1517,1521 ----
  {
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1570,1574 ****
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$3@>); 
  
!     if (c != 0)
      {       
          c->label_lattice(parameter, 
--- 1570,1574 ----
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$3@>); 
  
!     if (c != static_cast<Conic_Section_Lattice*>(0))
      {       
          c->label_lattice(parameter, 
***************
*** 1621,1625 ****
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$3@>); 
  
!     if (c != 0)
      {       
          c->label_lattice(parameter, 
--- 1621,1625 ----
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$3@>); 
  
!     if (c != static_cast<Conic_Section_Lattice*>(0))
      {       
          c->label_lattice(parameter, 
***************
*** 1673,1677 ****
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$4@>); 
  
!     if (c != 0)
      {       
          c->label_lattice(parameter, 
--- 1673,1677 ----
      Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$4@>); 
  
!     if (c != static_cast<Conic_Section_Lattice*>(0))
      {       
          c->label_lattice(parameter, 
diff -rc2P 3DLDF-2.0.2/src/pldfdcl.w 3DLDF-2.0.3/src/pldfdcl.w
*** 3DLDF-2.0.2/src/pldfdcl.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pldfdcl.w	Fri Dec 13 13:11:44 2013
***************
*** 2122,2126 ****
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != 0 && scanner_node->thread_info != 0
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
--- 2122,2127 ----
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        && scanner_node->thread_info != static_cast<Thread_Info_Type*>(0)
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
***************
*** 2205,2209 ****
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != 0 && scanner_node->thread_info != 0
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
--- 2206,2211 ----
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        && scanner_node->thread_info != static_cast<Thread_Info_Type*>(0)
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
***************
*** 2288,2292 ****
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != 0 && scanner_node->thread_info != 0
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
--- 2290,2295 ----
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        && scanner_node->thread_info != static_cast<Thread_Info_Type*>(0)
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
diff -rc2P 3DLDF-2.0.2/src/ploops.w 3DLDF-2.0.3/src/ploops.w
*** 3DLDF-2.0.2/src/ploops.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/ploops.w	Fri Dec 13 13:13:06 2013
***************
*** 584,588 ****
            scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!           if (temp_loop_info_node != 0)
  
              delete temp_loop_info_node;
--- 584,588 ----
            scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!           if (temp_loop_info_node != static_cast<Loop_Info_Node>(0))
  
              delete temp_loop_info_node;
***************
*** 746,750 ****
    scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!       if (temp_loop_info_node != 0)
  
          delete temp_loop_info_node;
--- 746,750 ----
    scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!       if (temp_loop_info_node != static_cast<Loop_Info_Node>(0))
  
          delete temp_loop_info_node;
***************
*** 830,834 ****
        scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!       if (temp_loop_info_node != 0)
  
          delete temp_loop_info_node;
--- 830,834 ----
        scanner_node->loop_info_node = scanner_node->loop_info_node->up;
        
!       if (temp_loop_info_node != static_cast<Loop_Info_Node>(0))
  
          delete temp_loop_info_node;
diff -rc2P 3DLDF-2.0.2/src/pmacros.w 3DLDF-2.0.3/src/pmacros.w
*** 3DLDF-2.0.2/src/pmacros.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pmacros.w	Fri Dec 13 13:19:38 2013
***************
*** 160,164 ****
  @q ****** (6).@> 
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
--- 160,164 ----
  @q ****** (6).@> 
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
***************
*** 182,186 ****
           scanner_node->macro_typed_parameter_vector.clear();
  
!          @=$$@> = 0;         
  
        }  /* |if (entry == 0)|  */
--- 182,186 ----
           scanner_node->macro_typed_parameter_vector.clear();
  
!          @=$$@> = static_cast<void*>(0);         
  
        }  /* |if (entry == 0)|  */
***************
*** 269,273 ****
  
  
!                 @=$$@> = 0;
       
              }  /* |if (status != 0)|  */
--- 269,273 ----
  
  
!                 @=$$@> = static_cast<void*>(0);
       
              }  /* |if (status != 0)|  */
***************
*** 278,282 ****
                 scanner_node->macro_typed_parameter_vector.clear();
  
!                @=$$@> = 0;
  
              }  /* |else| (|status == 0|)  */
--- 278,282 ----
                 scanner_node->macro_typed_parameter_vector.clear();
  
!                @=$$@> = static_cast<void*>(0);
  
              }  /* |else| (|status == 0|)  */
***************
*** 332,336 ****
     entry = static_cast<Id_Map_Entry_Node>(@=$2@>); 
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
--- 332,336 ----
     entry = static_cast<Id_Map_Entry_Node>(@=$2@>); 
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
***************
*** 354,358 ****
           scanner_node->macro_typed_parameter_vector.clear();
  
!          @=$$@> = 0;         
  
        }  /* |if (entry == 0)|  */
--- 354,358 ----
           scanner_node->macro_typed_parameter_vector.clear();
  
!          @=$$@> = static_cast<void*>(0);         
  
        }  /* |if (entry == 0)|  */
***************
*** 366,370 ****
  @q ******* (7) @> 
  
!          if (entry->object == 0)
              {
                 Definition_Info_Node d;
--- 366,370 ----
  @q ******* (7) @> 
  
!          if (entry->object == static_cast<void*>(0))
              {
                 Definition_Info_Node d;
***************
*** 483,487 ****
  
  
!                 @=$$@> = 0;
       
              }  /* |if (status != 0)|  */
--- 483,487 ----
  
  
!                 @=$$@> = static_cast<void*>(0);
       
              }  /* |if (status != 0)|  */
***************
*** 492,496 ****
                 scanner_node->macro_typed_parameter_vector.clear();
  
!                @=$$@> = 0;
  
              }  /* |else| (|status == 0|)  */
--- 492,496 ----
                 scanner_node->macro_typed_parameter_vector.clear();
  
!                @=$$@> = static_cast<void*>(0);
  
              }  /* |else| (|status == 0|)  */
***************
*** 527,531 ****
                                  static_cast<Id_Map_Entry_Node>(@=$2@>)); 
  
!    @=$$@> = 0;
  
  };
--- 527,531 ----
                                  static_cast<Id_Map_Entry_Node>(@=$2@>)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 558,562 ****
  {
  
!    @=$$@> = 0;
  };
  
--- 558,562 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 608,612 ****
              make_pair(@=$1@>, @=$2@>));   
     
!    @=$$@> = 0;
  
  };
--- 608,612 ----
              make_pair(@=$1@>, @=$2@>));   
     
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 632,636 ****
           make_pair(@=$3@>, @=$4@>));   
  
!    @=$$@> = 0;
  
  };
--- 632,636 ----
           make_pair(@=$3@>, @=$4@>));   
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 662,666 ****
  @=untyped_parameter_list: /* Empty  */@>@/ 
  {
!    @=$$@> = 0;
  
  };
--- 662,666 ----
  @=untyped_parameter_list: /* Empty  */@>@/ 
  {
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 681,685 ****
  @=untyped_parameter_list: LEFT_PARENTHESIS untyped_parameter_sublist RIGHT_PARENTHESIS@>@/ 
  {
!    @=$$@> = 0;
  
  };
--- 681,685 ----
  @=untyped_parameter_list: LEFT_PARENTHESIS untyped_parameter_sublist RIGHT_PARENTHESIS@>@/ 
  {
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 715,719 ****
           @=$1@>);
  
!    @=$$@> = 0;
  
  };
--- 715,719 ----
           @=$1@>);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 740,744 ****
           @=$3@>);
  
!    @=$$@> = 0;
  
  };
--- 740,744 ----
           @=$3@>);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 781,785 ****
     macro_call_func(static_cast<Scanner_Node>(parameter),
                     static_cast<Id_Map_Entry_Node>(@=$1@>));
!    @=$$@> = 0;
  
  };
--- 781,785 ----
     macro_call_func(static_cast<Scanner_Node>(parameter),
                     static_cast<Id_Map_Entry_Node>(@=$1@>));
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 806,810 ****
                     static_cast<Id_Map_Entry_Node>(@=$1@>));
  
!    @=$$@> = 0;
  
  };
--- 806,810 ----
                     static_cast<Id_Map_Entry_Node>(@=$1@>));
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 830,834 ****
                      static_cast<Id_Map_Entry_Node>(@=$1@>),
                      true);
!    @=$$@> = 0;
  
  };
--- 830,834 ----
                      static_cast<Id_Map_Entry_Node>(@=$1@>),
                      true);
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pnbvexpr.w 3DLDF-2.0.3/src/pnbvexpr.w
*** 3DLDF-2.0.2/src/pnbvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pnbvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 102,109 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 102,109 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pnmvexpr.w 3DLDF-2.0.3/src/pnmvexpr.w
*** 3DLDF-2.0.2/src/pnmvexpr.w	Thu Nov  7 13:36:05 2013
--- 3DLDF-2.0.3/src/pnmvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 182,186 ****
         {
  
!            @=$$@> = 0;
  
         }  /* |else|  (|status != 0|)  */
--- 182,186 ----
         {
  
!            @=$$@> = static_cast<void*>(0);
  
         }  /* |else|  (|status != 0|)  */
diff -rc2P 3DLDF-2.0.2/src/pnrbexpr.w 3DLDF-2.0.3/src/pnrbexpr.w
*** 3DLDF-2.0.2/src/pnrbexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pnrbexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 89,93 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 89,93 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
diff -rc2P 3DLDF-2.0.2/src/pntrvcf0.web 3DLDF-2.0.3/src/pntrvcf0.web
*** 3DLDF-2.0.2/src/pntrvcf0.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/pntrvcf0.web	Fri Dec 13 13:36:07 2013
***************
*** 467,471 ****
  
  
!    if (do_transform && transform != 0)
        *transform = t;
  
--- 467,471 ----
  
  
!    if (do_transform && transform != static_cast<Transform*>(0))
        *transform = t;
  
***************
*** 749,753 ****
  #endif 
  
!     if (do_transform && t == 0 )
         t = create_new<Transform>(0);
  
--- 749,753 ----
  #endif 
  
!     if (do_transform && t == static_cast<Transform*>(0))
         t = create_new<Transform>(0);
  
diff -rc2P 3DLDF-2.0.2/src/pntrvctr.web 3DLDF-2.0.3/src/pntrvctr.web
*** 3DLDF-2.0.2/src/pntrvctr.web	Sun Nov 10 16:53:35 2013
--- 3DLDF-2.0.3/src/pntrvctr.web	Fri Dec 13 13:33:24 2013
***************
*** 420,424 ****
     Pointer_Vector<C>* pvc;
  
!    if (c == 0)
       pvc = new Pointer_Vector<C>; 
     else 
--- 420,424 ----
     Pointer_Vector<C>* pvc;
  
!    if (c == static_cast<Pointer_Vector<C, C>*>(0))
       pvc = new Pointer_Vector<C>; 
     else 
***************
*** 868,872 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 868,872 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 947,951 ****
  static
  Pointer_Vector<C, C>* 
! convert(Pointer_Vector<D, D>*& d); 
  
  @q ***** (5) Definition.@> 
--- 947,951 ----
  static
  Pointer_Vector<C, C>* 
! convert(Pointer_Vector<D, D>* d); 
  
  @q ***** (5) Definition.@> 
***************
*** 955,961 ****
  template <class C, class D>
  Pointer_Vector<C, C>* 
! Pointer_Vector<C, D>::convert(Pointer_Vector<D, D>*& d)
  {
!    if (d == 0 || d->ctr == 0)
        return 0;
     
--- 955,962 ----
  template <class C, class D>
  Pointer_Vector<C, C>* 
! Pointer_Vector<C, D>::convert(Pointer_Vector<D, D>* d)
  {
!    if (   d == static_cast<Pointer_Vector<D, D>*>(0) 
!        || d->ctr == 0)
        return 0;
     
***************
*** 1135,1139 ****
               ++j;
  
!              if (*i == 0)
               {
                  ++i_ctr;
--- 1136,1140 ----
               ++j;
  
!              if (*i == static_cast<C*>(0))
               {
                  ++i_ctr;
***************
*** 1153,1157 ****
               for (;j != temp_vector.end(); ++j)
               {
!                 if (*j == 0)
                  ;
                  else if ((**i).is_equal(**j, tolerance))
--- 1154,1158 ----
               for (;j != temp_vector.end(); ++j)
               {
!                 if (*j == static_cast<C*>(0))
                  ;
                  else if ((**i).is_equal(**j, tolerance))
***************
*** 1174,1178 ****
  @q ******* (7)@> 
  
!    if (temp_vector.back() != 0)
     {
         v.push_back(temp_vector.back());
--- 1175,1179 ----
  @q ******* (7)@> 
  
!    if (temp_vector.back() != static_cast<C*>(0))
     {
         v.push_back(temp_vector.back());
***************
*** 1317,1321 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1318,1322 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1356,1360 ****
           ctr_strm << i++ << ":";
  
!          if (*iter != 0)
              (*iter)->show(ctr_strm.str());
           else 
--- 1357,1361 ----
           ctr_strm << i++ << ":";
  
!          if (*iter != static_cast<C*>(0))
              (*iter)->show(ctr_strm.str());
           else 
diff -rc2P 3DLDF-2.0.2/src/pnumexpr.w 3DLDF-2.0.3/src/pnumexpr.w
*** 3DLDF-2.0.2/src/pnumexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pnumexpr.w	Fri Dec 13 13:36:06 2013
***************
*** 110,117 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      }  /* |if (entry == 0 || entry->object == 0)| */
--- 110,117 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = ZERO_REAL;
  
      }  /* |if (entry == 0 || entry->object == 0)| */
***************
*** 224,240 ****
  #endif /* |DEBUG_COMPILE|  */
  
!   if (@=$3@> == 0)
      {
!       unsigned int first_line   = @=@@1@>.first_line;
!       unsigned int first_column = @=@@1@>.first_column;
!       unsigned int last_line    = @=@@3@>.last_line;
!       unsigned int last_column  = @=@@3@>.last_column;
  
        cerr_strm << "ERROR! ";
  
        if (scanner_node->in->type == Io_Struct::FILE_TYPE)
          cerr_strm << "In input file `" << scanner_node->in->filename << "' "
                    << first_line << "." << first_column << "--" << last_line
                    << "." << last_column << "." << endl;
  
        cerr_strm << "Division by 0.  Setting <numeric token atom> to 0."
--- 224,244 ----
  #endif /* |DEBUG_COMPILE|  */
  
!   if (@=$3@> == ZERO_REAL)
      {
! #if 0 
! @q       unsigned int first_line   = @@=@@1@@>.first_line;   @>
! @q       unsigned int first_column = @@=@@1@@>.first_column; @>
! @q       unsigned int last_line    = @@=@@3@@>.last_line;    @>
! @q       unsigned int last_column  = @@=@@3@@>.last_column;  @>
! #endif 
  
        cerr_strm << "ERROR! ";
  
+ #if 0 
        if (scanner_node->in->type == Io_Struct::FILE_TYPE)
          cerr_strm << "In input file `" << scanner_node->in->filename << "' "
                    << first_line << "." << first_column << "--" << last_line
                    << "." << last_column << "." << endl;
+ #endif 
  
        cerr_strm << "Division by 0.  Setting <numeric token atom> to 0."
***************
*** 246,250 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
  
--- 250,254 ----
        cerr_strm.str("");
  
!       @=$$@> = ZERO_REAL;
  
  
***************
*** 382,389 ****
    Point* p = static_cast<Point*>(@=$2@>);
  
!   if (p == 0)
      {
  
!       @=$$@> = 0;
        
      } /* |if (p == 0)|  */
--- 386,393 ----
    Point* p = static_cast<Point*>(@=$2@>);
  
!   if (p == static_cast<Point*>(0))
      {
  
!       @=$$@> = ZERO_REAL;
        
      } /* |if (p == 0)|  */
***************
*** 422,428 ****
  
    Point* p = static_cast<Point*>(@=$2@>);
!   if (p == 0)
      {
!       @=$$@> = 0;
        
      } /* |if (p == 0)|  */
--- 426,433 ----
  
    Point* p = static_cast<Point*>(@=$2@>);
! 
!   if (p == static_cast<Point*>(0))
      {
!       @=$$@> = ZERO_REAL;
        
      } /* |if (p == 0)|  */
***************
*** 448,452 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 453,457 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 466,470 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 471,475 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 484,488 ****
       @=$$@> = e->size();
     else
!      @=$$@> = 0;
  
     delete e;
--- 489,493 ----
       @=$$@> = e->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete e;
***************
*** 502,506 ****
       @=$$@> = e->size();
     else
!      @=$$@> = 0;
  
     delete e;
--- 507,511 ----
       @=$$@> = e->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete e;
***************
*** 526,530 ****
       @=$$@> = c->size();
     else
!      @=$$@> = 0;
  
     delete c;
--- 531,535 ----
       @=$$@> = c->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete c;
***************
*** 550,554 ****
       @=$$@> = c->size();
     else
!      @=$$@> = 0;
  
     delete c;
--- 555,559 ----
       @=$$@> = c->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete c;
***************
*** 579,583 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 584,588 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 604,608 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 609,613 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 629,633 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 634,638 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 654,658 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 659,663 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 679,683 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 684,688 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 703,707 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 708,712 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 727,731 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 732,736 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 745,749 ****
       @=$$@> = e->size();
     else
!      @=$$@> = 0;
  
     delete e;
--- 750,754 ----
       @=$$@> = e->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete e;
***************
*** 792,796 ****
     delete p;
  
!    @=$$@> = 0;
  
  };
--- 797,801 ----
     delete p;
  
!    @=$$@> = ZERO_REAL;
  
  };
***************
*** 816,820 ****
       @=$$@> = p->size();
     else
!      @=$$@> = 0;
  
     delete p;
--- 821,825 ----
       @=$$@> = p->size();
     else
!      @=$$@> = ZERO_REAL;
  
     delete p;
***************
*** 1523,1527 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
--- 1528,1532 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 1539,1544 ****
     else  /* |entry != 0|  */
        {
!           if (entry->object == 0)
!              @=$$@> = 0;
  
            else  /* |entry->object != 0|  */
--- 1544,1549 ----
     else  /* |entry != 0|  */
        {
!           if (entry->object == static_cast<void*>(0))
!              @=$$@> = ZERO_REAL;
  
            else  /* |entry->object != 0|  */
***************
*** 1583,1587 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           @=$$@> = INVALID_REAL;
--- 1588,1592 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           @=$$@> = INVALID_REAL;
***************
*** 1598,1603 ****
     else  /* |entry != 0|  */
        {
!           if (entry->object == 0)
!              @=$$@> = 0;
  
            else  /* |entry->object != 0|  */
--- 1603,1608 ----
     else  /* |entry != 0|  */
        {
!           if (entry->object == static_cast<void*>(0))
!              @=$$@> = ZERO_REAL;
  
            else  /* |entry->object != 0|  */
***************
*** 1830,1849 ****
  
    else if (part == CYAN_PART)
!     @=$$@> = 0;
  
    else if (part == MAGENTA_PART)
!     @=$$@> = 0;
  
    else if (part == BLACK_PART)
!     @=$$@> = 0;
  
    else if (part == WHITE_PART)
!     @=$$@> = 0;
  
    else if (part == RED_ORANGE_PART)
!     @=$$@> = 0;
  
    else if (part == BLUE_VIOLET_PART)
!     @=$$@> = 0;
  
    else
--- 1835,1854 ----
  
    else if (part == CYAN_PART)
!     @=$$@> = ZERO_REAL;
  
    else if (part == MAGENTA_PART)
!     @=$$@> = ZERO_REAL;
  
    else if (part == BLACK_PART)
!     @=$$@> = ZERO_REAL;
  
    else if (part == WHITE_PART)
!     @=$$@> = ZERO_REAL;
  
    else if (part == RED_ORANGE_PART)
!     @=$$@> = ZERO_REAL;
  
    else if (part == BLUE_VIOLET_PART)
!     @=$$@> = ZERO_REAL;
  
    else
***************
*** 2446,2450 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            @=$$@> = INVALID_REAL;
--- 2451,2455 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<real>*>(0))
        {
            @=$$@> = INVALID_REAL;
***************
*** 2895,2899 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
  
--- 2900,2904 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 2952,2956 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
  
--- 2957,2961 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 3005,3009 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
           @=$$@> = INVALID_REAL;
--- 3010,3014 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
           @=$$@> = INVALID_REAL;
***************
*** 3032,3036 ****
  @<Define rules@>=
  
!       if (*r == 0)
           {
               @=$$@> = INVALID_REAL;
--- 3037,3041 ----
  @<Define rules@>=
  
!       if (*r == ZERO_REAL)
           {
               @=$$@> = INVALID_REAL;
***************
*** 3070,3094 ****
    else if (@=$2@> == OVER)
      {
!       if (@=$3@> == 0)
          {
  
!           unsigned int first_line   = @=@@1.first_line;@>@;
!           unsigned int first_column = @=@@1.first_column;@>@;
!           unsigned int last_line    = @=@@3.last_line;@>@;
!           unsigned int last_column  = @=@@3.last_column;@>@;
  
            cerr_strm << "ERROR! ";
  
  
! 
            if (scanner_node->in->type == Io_Struct::FILE_TYPE)
              cerr_strm << "In input file `" << scanner_node->in->filename << "' "
                        << first_line << "." << first_column << "--" << last_line
                        << "." << last_column << ".\n";
  
            cerr_strm << "Division by 0.  Setting <numeric secondary> to 0.\n"
!                     << "Will try to continue.\n" << flush;
  
!           @=$$@> = 0;
              
            log_message(cerr_strm);
--- 3075,3102 ----
    else if (@=$2@> == OVER)
      {
!       if (@=$3@> == ZERO_REAL)
          {
  
! #if 0 
! @q           unsigned int first_line   = @@=@@1.first_line;@@>@@;   @>
! @q           unsigned int first_column = @@=@@1.first_column;@@>@@; @>
! @q           unsigned int last_line    = @@=@@3.last_line;@@>@@;    @>
! @q           unsigned int last_column  = @@=@@3.last_column;@@>@@;  @>
! #endif 
  
            cerr_strm << "ERROR! ";
  
  
! #if 0 
            if (scanner_node->in->type == Io_Struct::FILE_TYPE)
              cerr_strm << "In input file `" << scanner_node->in->filename << "' "
                        << first_line << "." << first_column << "--" << last_line
                        << "." << last_column << ".\n";
+ #endif 
  
            cerr_strm << "Division by 0.  Setting <numeric secondary> to 0.\n"
!                     << "Will try to continue.\n";
  
!           @=$$@> = ZERO_REAL;
              
            log_message(cerr_strm);
***************
*** 3216,3220 ****
  @<Define rules@>=
  
!     if (p == 0 || q == 0)
        {
  
--- 3224,3228 ----
  @<Define rules@>=
  
!     if (p == static_cast<Point*>(0) || q == static_cast<Point*>(0))
        {
  
***************
*** 3737,3741 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl << flush;
  #endif /* |DEBUG_COMPILE|  */ 
  
--- 3745,3749 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl;
  #endif /* |DEBUG_COMPILE|  */ 
  
***************
*** 3818,3824 ****
             << "Can't square it."
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n" << flush;
  
!       @=$$@> = 0;
        goto end_numeric_tertiary_2;
      }
--- 3826,3832 ----
             << "Can't square it."
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n";
  
!       @=$$@> = ZERO_REAL;
        goto end_numeric_tertiary_2;
      }
***************
*** 3833,3839 ****
             << "Can't square it."
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n" << flush;
  
!       @=$$@> = 0;
        goto end_numeric_tertiary_2;
      }
--- 3841,3847 ----
             << "Can't square it."
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n";
  
!       @=$$@> = ZERO_REAL;
        goto end_numeric_tertiary_2;
      }
***************
*** 3857,3867 ****
                 << "Can't perform Pythagorean addition."
                 << endl << "Setting `numeric_tertiary' to 0 "
!                << "and will try to continue.\n" << flush;
!           @=$$@> = 0;
  
            if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n"
!                 << flush;
                getchar();  /* Don't delete this!  */@;
              } 
--- 3865,3876 ----
                 << "Can't perform Pythagorean addition."
                 << endl << "Setting `numeric_tertiary' to 0 "
!                << "and will try to continue.\n";
! 
!           @=$$@> = ZERO_REAL;
  
            if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n";
! 
                getchar();  /* Don't delete this!  */@;
              } 
***************
*** 3892,3902 ****
                 << "Can't perform Pythagorean subtraction."
                 << endl << "Setting `numeric_tertiary' to 0 "
!                << "and will try to continue.\n" << flush;
!           @=$$@> = 0;
  
            if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n"
!                 << flush;
                getchar();  /* Don't delete this!  */@;
              } 
--- 3901,3911 ----
                 << "Can't perform Pythagorean subtraction."
                 << endl << "Setting `numeric_tertiary' to 0 "
!                << "and will try to continue.\n";
! 
!           @=$$@> = ZERO_REAL;
  
            if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n";
                getchar();  /* Don't delete this!  */@;
              } 
***************
*** 3921,3926 ****
             << "$2 has invalid value: " << @=$2@>
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n" << flush;
!       @=$$@> = 0;
        goto end_numeric_tertiary_2;
      }
--- 3930,3937 ----
             << "$2 has invalid value: " << @=$2@>
             << endl << "Setting `numeric_tertiary' to 0 "
!            << "and will try to continue.\n";
! 
!       @=$$@> = ZERO_REAL;
! 
        goto end_numeric_tertiary_2;
      }
***************
*** 3932,3936 ****
    if (DEBUG)
      {
!       cerr << "$$ == " << @=$$@> << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */ 
--- 3943,3947 ----
    if (DEBUG)
      {
!       cerr << "$$ == " << @=$$@> << endl;
      }
  #endif /* |DEBUG_COMPILE|  */ 
***************
*** 3996,4000 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl << flush;
  #endif /* |DEBUG_COMPILE|  */ 
  
--- 4007,4011 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl;
  #endif /* |DEBUG_COMPILE|  */ 
  
***************
*** 4026,4030 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl << flush;
  #endif /* |DEBUG_COMPILE|  */ 
  }
--- 4037,4041 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl;
  #endif /* |DEBUG_COMPILE|  */ 
  }
***************
*** 4047,4051 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl << flush;
  #endif /* |DEBUG_COMPILE|  */ 
  
--- 4058,4062 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl;
  #endif /* |DEBUG_COMPILE|  */ 
  
***************
*** 4080,4084 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl << flush;
  #endif /* |DEBUG_COMPILE|  */ 
  
--- 4091,4095 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "$$ == " << @=$$@> << endl;
  #endif /* |DEBUG_COMPILE|  */ 
  
diff -rc2P 3DLDF-2.0.2/src/points.web 3DLDF-2.0.3/src/points.web
*** 3DLDF-2.0.2/src/points.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/points.web	Fri Dec 13 13:41:28 2013
***************
*** 775,787 ****
  @<Initialize coordinates and limits@>=
  
- #ifdef __DECCXX  
-    world_coordinates          = null_coordinates;
-    user_coordinates           = null_coordinates;
-    view_coordinates           = null_coordinates;  
-    pre_projective_coordinates = null_coordinates;@/  
-    projective_coordinates = null_coordinates;@/  
- #endif 
- 
- #ifdef __GNUC__
     world_coordinates.resize(4, 0);
     user_coordinates.resize(4, 0);        
--- 775,778 ----
***************
*** 790,794 ****
     projective_coordinates.resize(4, 0); 
     transform.reset();
- #endif 
  
     world_coordinates[3] = 1; 
--- 781,784 ----
***************
*** 838,846 ****
    do_output = true;
  
!   pen_vector = 0; 
!   dash_pattern_vector = 0;
  
!   draw_color_vector = 0;
!   fill_color_vector = 0;
  
    shape_type = POINT_TYPE;
--- 828,836 ----
    do_output = true;
  
!   pen_vector          = static_cast<Pointer_Vector<Pen>*>(0);
!   dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
  
!   draw_color_vector   = static_cast<Pointer_Vector<Color>*>(0);
!   fill_color_vector   = static_cast<Pointer_Vector<Color>*>(0);
  
    shape_type = POINT_TYPE;
***************
*** 903,911 ****
     do_output = true;
  
!    pen_vector = 0; 
!    dash_pattern_vector = 0;
  
!    draw_color_vector = 0;
!    fill_color_vector = 0;
  
     shape_type = POINT_TYPE;
--- 893,901 ----
     do_output = true;
  
!    pen_vector          = static_cast<Pointer_Vector<Pen>*>(0);
!    dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
  
!    draw_color_vector   = static_cast<Pointer_Vector<Color>*>(0);
!    fill_color_vector   = static_cast<Pointer_Vector<Color>*>(0);
  
     shape_type = POINT_TYPE;
***************
*** 972,998 ****
      Point p(x, y, z);
  
!     if (pen_vector != 0)
         {
             delete pen_vector;
!            pen_vector = 0; 
         }
  
!     if (dash_pattern_vector != 0)
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = 0; 
         }
  
! 
!    if (draw_color_vector != 0)
        {
           delete draw_color_vector;
!          draw_color_vector = 0;
        }
  
!    if (fill_color_vector != 0)
        {
           delete fill_color_vector;
!          fill_color_vector = 0;
        }
  
--- 962,987 ----
      Point p(x, y, z);
  
!     if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
         {
             delete pen_vector;
!            pen_vector = static_cast<Pointer_Vector<Pen>*>(0); 
         }
  
!     if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0); 
         }
  
!    if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete draw_color_vector;
!          draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
!    if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete fill_color_vector;
!          fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
***************
*** 1037,1045 ****
     @<Initialize coordinates and limits@>@;
  
!    draw_color_vector = 0;
!    fill_color_vector = 0;
  
!    pen_vector = 0;
!    dash_pattern_vector = 0;
  
     *this = p;
--- 1026,1034 ----
     @<Initialize coordinates and limits@>@;
  
!    draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
!    fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
  
!    pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
!    dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0);
  
     *this = p;
***************
*** 1049,1052 ****
--- 1038,1044 ----
     decomposition_level = 0;
     do_output = true;
+ 
+    return;
+ 
  }
  
***************
*** 1086,1111 ****
  {
  
!    if (draw_color_vector != 0)
        {
           delete draw_color_vector;
!          draw_color_vector = 0;
        }
  
!    if (fill_color_vector != 0)
        {
           delete fill_color_vector;
!          fill_color_vector = 0;
        }
  
!     if (pen_vector != 0)
         {
             delete pen_vector;
!            pen_vector = 0; 
         }
  
!     if (dash_pattern_vector != 0)
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = 0; 
         }
  
--- 1078,1103 ----
  {
  
!    if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete draw_color_vector;
!          draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
!    if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete fill_color_vector;
!          fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
!     if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
         {
             delete pen_vector;
!            pen_vector = static_cast<Pointer_Vector<Pen>*>(0); 
         }
  
!     if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0); 
         }
  
***************
*** 1219,1246 ****
  Point::~Point(void)
  {
  
!     if (pen_vector != 0)
         {
             delete pen_vector;
!            pen_vector = 0; 
         }
  
!     if (dash_pattern_vector != 0)
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = 0; 
         }
  
  
!    if (draw_color_vector != 0)
        {
           delete draw_color_vector;
!          draw_color_vector = 0;
        }
  
!    if (fill_color_vector != 0)
        {
           delete fill_color_vector;
!          fill_color_vector = 0;
        }
  
--- 1211,1251 ----
  Point::~Point(void)
  {
+    volatile bool DEBUG = false;  /* |true|  */
+ 
+ 
+ #if DEBUG_COMPILE
+    if (DEBUG)
+    {
+        cerr_mutex.lock(); 
+        cerr << "Entering `Point' destructor." << endl;
+        cerr_mutex.unlock(); 
+ 
+    }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
  
!     if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
         {
             delete pen_vector;
!            pen_vector = static_cast<Pointer_Vector<Pen>*>(0); 
         }
  
!     if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0); 
         }
  
  
!    if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete draw_color_vector;
!          draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
!    if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete fill_color_vector;
!          fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
***************
*** 1339,1352 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
- 
    transform     = p.transform;
  
- 
    drawdot_value = p.drawdot_value;
  
!   if (p.draw_color_vector == 0 && draw_color_vector == 0) 
       ; /* Do nothing.  */@; 
  
!   else if (p.draw_color_vector != 0 && draw_color_vector == 0)
       {
          draw_color_vector = new Pointer_Vector<Color>;
--- 1344,1357 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
    transform     = p.transform;
  
    drawdot_value = p.drawdot_value;
  
!   if (   p.draw_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!       && draw_color_vector == static_cast<Pointer_Vector<Color>*>(0)) 
       ; /* Do nothing.  */@; 
  
!   else if (   p.draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!            && draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
       {
          draw_color_vector = new Pointer_Vector<Color>;
***************
*** 1354,1372 ****
       }
  
!   else if (p.draw_color_vector != 0 && draw_color_vector != 0)
       *draw_color_vector = *(p.draw_color_vector);
       
!   else if (p.draw_color_vector == 0 && draw_color_vector != 0)
       {
          delete draw_color_vector;
!         draw_color_vector = 0;
  
       }
  
    
!   if (p.pen_vector == 0 && pen_vector == 0)
       ;  /* Do nothing.  */@; 
  
!   else if (p.pen_vector != 0 && pen_vector == 0)
        {
           pen_vector = new Pointer_Vector<Pen>;
--- 1359,1381 ----
       }
  
!   else if (   p.draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!            && draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
       *draw_color_vector = *(p.draw_color_vector);
       
!   else if (   p.draw_color_vector == static_cast<Pointer_Vector<Color>*>(0) 
!            && draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
       {
          delete draw_color_vector;
!         draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
  
       }
  
    
!   if (   p.pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!       && pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
       ;  /* Do nothing.  */@; 
  
!   else if (   p.pen_vector != static_cast<Pointer_Vector<Pen>*>(0) 
!            && pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        {
           pen_vector = new Pointer_Vector<Pen>;
***************
*** 1374,1384 ****
        }
  
!   else if (p.pen_vector != 0 && pen_vector != 0)
        *pen_vector = *(p.pen_vector);
  
!   else if (p.pen_vector == 0 && pen_vector != 0)
        {
           delete pen_vector;
!          pen_vector = 0;
        }
  
--- 1383,1395 ----
        }
  
!   else if (   p.pen_vector != static_cast<Pointer_Vector<Pen>*>(0) 
!            && pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
        *pen_vector = *(p.pen_vector);
  
!   else if (   p.pen_vector == static_cast<Pointer_Vector<Pen>*>(0) 
!            && pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
        {
           delete pen_vector;
!          pen_vector = static_cast<Pointer_Vector<Pen>*>(0);
        }
  
***************
*** 1480,1505 ****
  {
  
!     if (pen_vector != 0)
         {
             delete pen_vector;
!            pen_vector = 0; 
         }
  
!     if (dash_pattern_vector != 0)
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = 0; 
         }
  
!    if (draw_color_vector != 0)
        {
           delete draw_color_vector;
!          draw_color_vector = 0;
        }
  
!    if (fill_color_vector != 0)
        {
           delete fill_color_vector;
!          fill_color_vector = 0;
        }
  
--- 1491,1516 ----
  {
  
!     if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0))
         {
             delete pen_vector;
!            pen_vector = static_cast<Pointer_Vector<Pen>*>(0); 
         }
  
!     if (dash_pattern_vector != static_cast<Pointer_Vector<Dash_Pattern>*>(0))
         {
             delete dash_pattern_vector;
!            dash_pattern_vector = static_cast<Pointer_Vector<Dash_Pattern>*>(0); 
         }
  
!    if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete draw_color_vector;
!          draw_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
!    if (fill_color_vector != static_cast<Pointer_Vector<Color>*>(0))
        {
           delete fill_color_vector;
!          fill_color_vector = static_cast<Pointer_Vector<Color>*>(0);
        }
  
***************
*** 1924,1928 ****
  @<Define |Point| functions@>=
  
!           if (f == 0)
  
              {
--- 1935,1939 ----
  @<Define |Point| functions@>=
  
!           if (f == static_cast<Focus*>(0))
  
              {
***************
*** 1931,1936 ****
                       << "'Focus* f' may not be 0.\n"
                       << "Returning 'projective_coordinates' as-is "
!                      << "and will try to continue." << endl 
!                     ;
                  return  projective_coordinates;
              }
--- 1942,1947 ----
                       << "'Focus* f' may not be 0.\n"
                       << "Returning 'projective_coordinates' as-is "
!                      << "and will try to continue." << endl;
! 
                  return  projective_coordinates;
              }
***************
*** 2050,2054 ****
  @
  @<Define |Point| functions@>=
!   if(do_persp && f == 0)
      {
          cerr << "ERROR! In 'Point::get_all_coords':"
--- 2061,2065 ----
  @
  @<Define |Point| functions@>=
!   if(do_persp && f == static_cast<Focus*>(0))
      {
          cerr << "ERROR! In 'Point::get_all_coords':"
***************
*** 2056,2061 ****
               << "'Focus* f' may not be 0.\n"
               << "Returning 'projective_coordinates' as-is "
!              << "and will try to continue." << endl 
!             ;
          return  INVALID_REAL;
      }
--- 2067,2072 ----
               << "'Focus* f' may not be 0.\n"
               << "Returning 'projective_coordinates' as-is "
!              << "and will try to continue." << endl;
! 
          return  INVALID_REAL;
      }
***************
*** 2668,2673 ****
      {
        cerr << "ERROR! In Point::is_on_segment()\n"
!         << "Can't calculate t. Returning false and INVALID_REAL.\n\n"
!          ;
        return pair <bool, real>(false, INVALID_REAL);
      }
--- 2679,2684 ----
      {
        cerr << "ERROR! In Point::is_on_segment()\n"
!         << "Can't calculate t. Returning false and INVALID_REAL.\n\n";
! 
        return pair <bool, real>(false, INVALID_REAL);
      }
***************
*** 2954,2958 ****
  Point::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
--- 2965,2969 ----
  Point::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
***************
*** 3005,3009 ****
  Point::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 3016,3020 ----
  Point::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 3056,3063 ****
  Point::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 3067,3074 ----
  Point::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 3119,3123 ****
  Point::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == 0)
        pen_vector = new Pointer_Vector<Pen>;
  
--- 3130,3134 ----
  Point::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        pen_vector = new Pointer_Vector<Pen>;
  
***************
*** 3163,3167 ****
  Point::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == 0)
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
--- 3174,3178 ----
  Point::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
***************
*** 3972,3976 ****
  {
    Transform t;
!   if (x != 0 || y != 0 || z != 0)
      transform *= t.shift(x, y, z);
    return t;
--- 3983,3987 ----
  {
    Transform t;
!   if (x != ZERO_REAL || y != ZERO_REAL || z != ZERO_REAL)
      transform *= t.shift(x, y, z);
    return t;
***************
*** 4207,4211 ****
          cerr << "angle of projection: " << angle << endl;
  
!       if(angle != 0 && angle != INVALID_REAL)
          t *= p1.rotate(0, -angle);
  
--- 4218,4222 ----
          cerr << "angle of projection: " << angle << endl;
  
!       if(angle != ZERO_REAL && angle != INVALID_REAL)
          t *= p1.rotate(0, -angle);
  
***************
*** 4218,4222 ****
          cerr << "angle to x-axis: " << angle << endl;
  
!       if(angle != 0 && angle != INVALID_REAL)
          t *= p1.rotate(0, 0, -angle);
  
--- 4229,4233 ----
          cerr << "angle to x-axis: " << angle << endl;
  
!       if(angle != ZERO_REAL && angle != INVALID_REAL)
          t *= p1.rotate(0, 0, -angle);
  
***************
*** 4259,4265 ****
  \ENDLOG  
  @<Define |Transform| functions@>= 
!       if (   proj_on_x_z_plane.world_coordinates[0] == 0  
!           && proj_on_x_z_plane.world_coordinates[1] == 0)
!         angle = 0;
        else
          angle = proj_on_x_z_plane.angle(pt_on_z_axis);
--- 4270,4276 ----
  \ENDLOG  
  @<Define |Transform| functions@>= 
!       if (   proj_on_x_z_plane.world_coordinates[0] == ZERO_REAL  
!           && proj_on_x_z_plane.world_coordinates[1] == ZERO_REAL)
!         angle = ZERO_REAL;
        else
          angle = proj_on_x_z_plane.angle(pt_on_z_axis);
***************
*** 4272,4276 ****
          cerr << "angle of projection: " << angle << endl;
  
!       if(angle != 0 && angle != INVALID_REAL)
          t *= p1.rotate(0, angle);
  
--- 4283,4287 ----
          cerr << "angle of projection: " << angle << endl;
  
!       if(angle != ZERO_REAL && angle != INVALID_REAL)
          t *= p1.rotate(0, angle);
  
***************
*** 4294,4299 ****
  \ENDLOG  
  @<Define |Transform| functions@>= 
! if (p1.world_coordinates[1] == 0)  
!   angle = 0;
  else
    angle = p1.angle(pt_on_z_axis);
--- 4305,4310 ----
  \ENDLOG  
  @<Define |Transform| functions@>= 
! if (p1.world_coordinates[1] == ZERO_REAL)  
!   angle = ZERO_REAL;
  else
    angle = p1.angle(pt_on_z_axis);
***************
*** 4306,4310 ****
  
  
!       if(angle != 0 && angle != INVALID_REAL)
          t *= p1.rotate(-angle);
        
--- 4317,4321 ----
  
  
!       if(angle != ZERO_REAL && angle != INVALID_REAL)
          t *= p1.rotate(-angle);
        
***************
*** 4703,4707 ****
         {
           using namespace Projections;
!          if (factor == 0)
             {
               cerr << "ERROR! In Point::project():\n"
--- 4714,4718 ----
         {
           using namespace Projections;
!          if (factor == ZERO_REAL)
             {
               cerr << "ERROR! In Point::project():\n"
***************
*** 4753,4758 ****
                    << projective_coordinates[1] << ", " 
                    << projective_coordinates[2] << ", " 
!                   << projective_coordinates[3] << ")" << endl << endl 
!                  ;  
             }
  
--- 4764,4769 ----
                    << projective_coordinates[1] << ", " 
                    << projective_coordinates[2] << ", " 
!                   << projective_coordinates[3] << ")" << endl << endl;
! 
             }
  
***************
*** 4780,4784 ****
  @<Define |Point| functions@>=
  
!   if (temp_coordinates[2] + f.get_distance() == 0)
      {
        cerr << "ERROR! In Point::project():\n"
--- 4791,4795 ----
  @<Define |Point| functions@>=
  
!   if (temp_coordinates[2] + f.get_distance() == ZERO_REAL)
      {
        cerr << "ERROR! In Point::project():\n"
***************
*** 4830,4834 ****
    real eps = epsilon();
  
!   if (projective_coordinates[3] == 0)
      {
        cerr << "ERROR! In Point::project(): "
--- 4841,4845 ----
    real eps = epsilon();
  
!   if (projective_coordinates[3] == ZERO_REAL)
      {
        cerr << "ERROR! In Point::project(): "
***************
*** 4946,4950 ****
                  += world_coordinates[j] * transform.transform_matrix[j][i];
  
!               if (new_coordinates[i] != 0)
                  {
                    if (DEBUG)
--- 4957,4961 ----
                  += world_coordinates[j] * transform.transform_matrix[j][i];
  
!               if (new_coordinates[i] != ZERO_REAL)
                  {
                    if (DEBUG)
***************
*** 5103,5110 ****
      pt->drawdot_value = DRAWDOT_VALUE;  
  
!   if (ddrawdot_color != 0)
      pt->push_draw_color(ddrawdot_color, true);
    
!   if (ppen != 0)
       {
          pt->push_pen(ppen);
--- 5114,5121 ----
      pt->drawdot_value = DRAWDOT_VALUE;  
  
!   if (ddrawdot_color != static_cast<Color*>(0))
      pt->push_draw_color(ddrawdot_color, true);
    
!   if (ppen != static_cast<Pen*>(0))
       {
          pt->push_pen(ppen);
***************
*** 5274,5278 ****
  
  
!   if (ppen != 0)
       {
          pt->push_pen(ppen);
--- 5285,5289 ----
  
  
!   if (ppen != static_cast<Pen*>(0))
       {
          pt->push_pen(ppen);
***************
*** 5667,5672 ****
      if (*this == INVALID_POINT)
        {
!           cerr << "INVALID_POINT: (INVALID_REAL, INVALID_REAL, INVALID_REAL)\n"
!            ;
            return;
        }
--- 5678,5683 ----
      if (*this == INVALID_POINT)
        {
!           cerr << "INVALID_POINT: (INVALID_REAL, INVALID_REAL, INVALID_REAL)\n";
! 
            return;
        }
***************
*** 6232,6236 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 6243,6247 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 6347,6351 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 6358,6362 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 6460,6464 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 6471,6475 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 7504,7509 ****
      {
        if (DEBUG)
!         cerr << "In Point::output(): do_output == false. Returning.\n" 
!             ;
        return;
      }
--- 7515,7520 ----
      {
        if (DEBUG)
!         cerr << "In Point::output(): do_output == false. Returning.\n";
! 
        return;
      }
***************
*** 7537,7542 ****
        if (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
          {
!           cerr << "Type <RETURN> to continue.\n"
!               ;  
            getchar();  /* Don't delete this!  */@;  
          } 
--- 7548,7553 ----
        if (scanner_node->get_run_state()->error_stop_mode == Run_State::STOPPING)
          {
!           cerr << "Type <RETURN> to continue.\n";
! 
            getchar();  /* Don't delete this!  */@;  
          } 
***************
*** 7566,7570 ****
  @<Define |Point| functions@>=
  
!   if (draw_color_vector != 0 && draw_color_vector->ctr > 0)
      *out_stream << endl << "   withcolor " << *(draw_color_vector->v[0]);
  
--- 7577,7581 ----
  @<Define |Point| functions@>=
  
!   if (draw_color_vector != static_cast<Pointer_Vector<Color>*>(0) && draw_color_vector->ctr > 0)
      *out_stream << endl << "   withcolor " << *(draw_color_vector->v[0]);
  
***************
*** 7580,7584 ****
  @<Define |Point| functions@>=
  
!   if (pen_vector != 0 && pen_vector->ctr > 0)
      {
  
--- 7591,7595 ----
  @<Define |Point| functions@>=
  
!   if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0) && pen_vector->ctr > 0)
      {
  
***************
*** 7617,7622 ****
                == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n"
!                   ;  
                getchar();  /* Don't delete this!  */@;  
              } 
--- 7628,7633 ----
                == Run_State::STOPPING)
              {
!               cerr << "Type <RETURN> to continue.\n";
! 
                getchar();  /* Don't delete this!  */@;  
              } 
***************
*** 7672,7676 ****
          } /* |if (!pen->get_transform().is_identity())|  */@;
  
!     }  /* |if (pen_vector != 0 && pen_vector->ctr > 0)|  */
  
  
--- 7683,7687 ----
          } /* |if (!pen->get_transform().is_identity())|  */@;
  
!     }  /* |if (pen_vector != static_cast<Pointer_Vector<Pen>*>(0) && pen_vector->ctr > 0)|  */
  
  
***************
*** 8280,8284 ****
     and I don't know how to turn it off.
    \initials{LDF 2006.11.09.}  */
- cerr << "Error after here 6" << endl; 
  #endif 
  
--- 8291,8294 ----
***************
*** 8516,8519 ****
--- 8526,8530 ----
  \initials{LDF 2002.10.27.}  Note that the vector operations don't affect the w
  coordinate. 
+ 
  \LOG 
  \initials{LDF 2002.10.27.}     
***************
*** 9009,9013 ****
        return INVALID_REAL;
      }
!   else if (mag == 0)
      {
        if (DEBUG) 
--- 9020,9024 ----
        return INVALID_REAL;
      }
!   else if (mag == ZERO_REAL)
      {
        if (DEBUG) 
***************
*** 9023,9027 ****
        return INVALID_REAL;
      }
!   else if (p_mag == 0)
      {
        if (DEBUG) 
--- 9034,9038 ----
        return INVALID_REAL;
      }
!   else if (p_mag == ZERO_REAL)
      {
        if (DEBUG) 
***************
*** 9097,9102 ****
                 << "Don't call this function with false as its argument.\n"
                 << "Use unit_vector() without an argument instead.\n"
!                << "Calling unit_vector() without an argument.\n\n" 
!               ;
          }
        return unit_vector();
--- 9108,9113 ----
                 << "Don't call this function with false as its argument.\n"
                 << "Use unit_vector() without an argument instead.\n"
!                << "Calling unit_vector() without an argument.\n\n";
! 
          }
        return unit_vector();
***************
*** 9108,9112 ****
  
  
!   if (m == 0)  /* LDF 2002.04.10.  Added this error handling code for the case where
                                     *this has no magnitude.  */
      {
--- 9119,9123 ----
  
  
!   if (m == ZERO_REAL)  /* LDF 2002.04.10.  Added this error handling code for the case where
                                     *this has no magnitude.  */
      {
***************
*** 9428,9434 ****
  @<Define |Point| functions@>=
    
!   if (t_x == 0 && p_x == 0
!       && t_y == 0 && p_y == 0
!       && t_z == 0 && p_z == 0)
      {
  
--- 9439,9445 ----
  @<Define |Point| functions@>=
    
!   if (t_x == ZERO_REAL && p_x == ZERO_REAL
!       && t_y == ZERO_REAL && p_y == ZERO_REAL
!       && t_z == ZERO_REAL && p_z == ZERO_REAL)
      {
  
***************
*** 9469,9510 ****
    signed short p_z_sign;
  
!   if(t_x == 0)
      t_x_sign = 0;
!   else if (t_x < 0)
      t_x_sign = -1;
    else
      t_x_sign = 1;
  
!   if(t_y == 0)
      t_y_sign = 0;
!   else if (t_y < 0)
      t_y_sign = -1;
    else
      t_y_sign = 1;
  
!   if(t_z == 0)
      t_z_sign = 0;
!   else if (t_z < 0)
      t_z_sign = -1;
    else
      t_z_sign = 1;
  
!   if(p_x == 0)
      p_x_sign = 0;
!   else if (p_x < 0)
      p_x_sign = -1;
    else
      p_x_sign = 1;
  
!   if(p_y == 0)
      p_y_sign = 0;
!   else if (p_y < 0)
      p_y_sign = -1;
    else
      p_y_sign = 1;
  
!   if(p_z == 0)
      p_z_sign = 0;
!   else if (p_z < 0)
      p_z_sign = -1;
    else
--- 9480,9521 ----
    signed short p_z_sign;
  
!   if (t_x == ZERO_REAL)
      t_x_sign = 0;
!   else if (t_x < ZERO_REAL)
      t_x_sign = -1;
    else
      t_x_sign = 1;
  
!   if (t_y == ZERO_REAL)
      t_y_sign = 0;
!   else if (t_y < ZERO_REAL)
      t_y_sign = -1;
    else
      t_y_sign = 1;
  
!   if (t_z == ZERO_REAL)
      t_z_sign = 0;
!   else if (t_z < ZERO_REAL)
      t_z_sign = -1;
    else
      t_z_sign = 1;
  
!   if (p_x == ZERO_REAL)
      p_x_sign = 0;
!   else if (p_x < ZERO_REAL)
      p_x_sign = -1;
    else
      p_x_sign = 1;
  
!   if (p_y == ZERO_REAL)
      p_y_sign = 0;
!   else if (p_y < ZERO_REAL)
      p_y_sign = -1;
    else
      p_y_sign = 1;
  
!   if (p_z == ZERO_REAL)
      p_z_sign = 0;
!   else if (p_z < ZERO_REAL)
      p_z_sign = -1;
    else
***************
*** 9935,9957 ****
  
      real slope_p_x_y
!       = (delta_x_p != 0) ? delta_y_p/delta_x_p : INVALID_REAL;     
  
  
      real slope_p_x_z
!       = (delta_x_p != 0) ? delta_z_p/delta_x_p : INVALID_REAL; 
  
      real slope_p_z_y
!       = (delta_z_p != 0) ? delta_y_p/delta_z_p : INVALID_REAL;
  
  @ Slopes for line $\overrightarrow{q_0q_1}$.
  @<Define |Point| functions@>=
     real slope_q_x_y
!       = (delta_x_q != 0) ? delta_y_q/delta_x_q : INVALID_REAL; 
  
      real slope_q_x_z
!       = (delta_x_q != 0) ? delta_z_q/delta_x_q : INVALID_REAL; 
  
      real slope_q_z_y
!       = (delta_z_q != 0) ? delta_y_q/delta_z_q : INVALID_REAL; 
      
  @ The traces on the x-y plane. |x_i|, |y_i|, |z_i|, |y_int_p|, and
--- 9946,9968 ----
  
      real slope_p_x_y
!       = (delta_x_p != ZERO_REAL) ? delta_y_p/delta_x_p : INVALID_REAL;     
  
  
      real slope_p_x_z
!       = (delta_x_p != ZERO_REAL) ? delta_z_p/delta_x_p : INVALID_REAL; 
  
      real slope_p_z_y
!       = (delta_z_p != ZERO_REAL) ? delta_y_p/delta_z_p : INVALID_REAL;
  
  @ Slopes for line $\overrightarrow{q_0q_1}$.
  @<Define |Point| functions@>=
     real slope_q_x_y
!       = (delta_x_q != ZERO_REAL) ? delta_y_q/delta_x_q : INVALID_REAL; 
  
      real slope_q_x_z
!       = (delta_x_q != ZERO_REAL) ? delta_z_q/delta_x_q : INVALID_REAL; 
  
      real slope_q_z_y
!       = (delta_z_q != ZERO_REAL) ? delta_y_q/delta_z_q : INVALID_REAL; 
      
  @ The traces on the x-y plane. |x_i|, |y_i|, |z_i|, |y_int_p|, and
diff -rc2P 3DLDF-2.0.2/src/polygons.web 3DLDF-2.0.3/src/polygons.web
*** 3DLDF-2.0.2/src/polygons.web	Sun Nov 10 14:44:51 2013
--- 3DLDF-2.0.3/src/polygons.web	Fri Dec 13 13:45:26 2013
***************
*** 310,314 ****
          << "Polygon doesn't contain any Points, "
          << "so it presumably doesn't have a center.\n"
!         << "Returning INVALID_POINT.\n\n" << flush;
        return const_cast<Point&>(INVALID_POINT);
      }
--- 310,314 ----
          << "Polygon doesn't contain any Points, "
          << "so it presumably doesn't have a center.\n"
!         << "Returning INVALID_POINT.\n\n";
        return const_cast<Point&>(INVALID_POINT);
      }
***************
*** 344,348 ****
          << "Polygon doesn't contain any Points, "
          << "so it presumably doesn't have a center.\n"
!         << "Returning INVALID_POINT.\n\n" << flush;
        return const_cast<Point&>(INVALID_POINT);
      }
--- 344,348 ----
          << "Polygon doesn't contain any Points, "
          << "so it presumably doesn't have a center.\n"
!         << "Returning INVALID_POINT.\n\n";
        return const_cast<Point&>(INVALID_POINT);
      }
***************
*** 804,808 ****
  else if (surface_vector == pt_vector || surface_vector == -pt_vector
           || cross == pl.normal || cross == -pl.normal 
!          || cross.magnitude() == 0)
    {
  
--- 804,808 ----
  else if (surface_vector == pt_vector || surface_vector == -pt_vector
           || cross == pl.normal || cross == -pl.normal 
!          || cross.magnitude() == ZERO_REAL)
    {
  
***************
*** 825,829 ****
  
  
!   if (distance == 0)
      {
  
--- 825,829 ----
  
  
!   if (distance == ZERO_REAL)
      {
  
***************
*** 1100,1104 ****
  #if DEBUG_COMPILE
                if (DEBUG) 
!                 cerr << "The line and the Polygon are non-coplanar.\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1100,1104 ----
  #if DEBUG_COMPILE
                if (DEBUG) 
!                 cerr << "The line and the Polygon are non-coplanar.\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1122,1126 ****
              if (DEBUG)
                {
!                 cerr << "bp.pt == center." << endl << flush;
                }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1122,1126 ----
              if (DEBUG)
                {
!                 cerr << "bp.pt == center." << endl;
                }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1139,1143 ****
              show("this:");
              center.show("center");
!             cerr << "points.size() == " << points.size() << endl << flush;
            }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1139,1143 ----
              show("this:");
              center.show("center");
!             cerr << "points.size() == " << points.size() << endl;
            }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1174,1180 ****
                      {
                        if (bp.pt == r0)
!                         cerr << "bp.pt == r0." << endl << flush;
                        else if (bp.pt == r1)
!                         cerr << "bp.pt == r1." << endl << flush;
                      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1174,1180 ----
                      {
                        if (bp.pt == r0)
!                         cerr << "bp.pt == r0." << endl;
                        else if (bp.pt == r1)
!                         cerr << "bp.pt == r1." << endl;
                      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1247,1251 ****
     if (DEBUG)
       {
!          cerr << "Exiting Polygon::intersection_points.\n\n" << flush;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 1247,1251 ----
     if (DEBUG)
       {
!          cerr << "Exiting Polygon::intersection_points.\n\n";
       }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1373,1378 ****
        pl.normal.show("pl.normal");
        r_pl.normal.show("r_pl.normal");
!       cerr << "pl.distance == " << pl.distance << endl << flush;
!       cerr << "r_pl.distance == " << r_pl.distance << endl << flush;
      }
    
--- 1373,1378 ----
        pl.normal.show("pl.normal");
        r_pl.normal.show("r_pl.normal");
!       cerr << "pl.distance == " << pl.distance << endl;
!       cerr << "r_pl.distance == " << r_pl.distance << endl;
      }
    
***************
*** 1383,1387 ****
  
    if (DEBUG) 
!     cerr << "distance == " << distance << endl << flush;
  
    if (pl.normal == r_pl.normal)
--- 1383,1387 ----
  
    if (DEBUG) 
!     cerr << "distance == " << distance << endl;
  
    if (pl.normal == r_pl.normal)
***************
*** 1391,1395 ****
  @ Coplanar case.
  @<Define |Polygon| functions@>=
!       if (distance == 0)
          {
            if (DEBUG) 
--- 1391,1395 ----
  @ Coplanar case.
  @<Define |Polygon| functions@>=
!       if (distance == ZERO_REAL)
          {
            if (DEBUG) 
***************
*** 1433,1437 ****
              cerr << "WARNING!  In Polygon::intersection_points():\n"
                   << "The Polygons lie in parallel planes. "
!                  << "Returning empty vector<Point>.\n\n" << flush;
              return v;
          }
--- 1433,1437 ----
              cerr << "WARNING!  In Polygon::intersection_points():\n"
                   << "The Polygons lie in parallel planes. "
!                  << "Returning empty vector<Point>.\n\n";
              return v;
          }
***************
*** 1500,1504 ****
           if (DEBUG)
             cerr << "No intersection points found.  "
!                 << "Returning empty vector<Point>\n\n" << flush;
           v.clear();
           return v;
--- 1500,1504 ----
           if (DEBUG)
             cerr << "No intersection points found.  "
!                 << "Returning empty vector<Point>\n\n";
           v.clear();
           return v;
***************
*** 1885,1889 ****
  @<Define |Polygon| functions@>=
  
!  if (polygon_reflection == 0)
   {
    try
--- 1885,1889 ----
  @<Define |Polygon| functions@>=
  
!  if (polygon_reflection == static_cast<Polygon*>(0))
   {
    try
***************
*** 2104,2108 ****
  @q *** (3).@> 
  
!    if (v == 0)
        {
            cerr_strm << thread_name << "ERROR!  In `Polygon::reflect_off():"
--- 2104,2108 ----
  @q *** (3).@> 
  
!    if (v == static_cast<void*>(0))
        {
            cerr_strm << thread_name << "ERROR!  In `Polygon::reflect_off():"
***************
*** 2295,2303 ****
                                                      &warning_stop_value);
  
     using namespace Scan_Parse;
  
  @q **** (4).@>
  
!    if (v == 0)
        {
            cerr_strm << thread_name << "ERROR!  In `Polygon::disentangle():"
--- 2295,2318 ----
                                                      &warning_stop_value);
  
+ 
     using namespace Scan_Parse;
  
+ @q **** (4) @>
+ 
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "Entering `Polygon::disentangle'."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
  @q **** (4).@>
  
!    if (v == static_cast<void*>(0))
        {
            cerr_strm << thread_name << "ERROR!  In `Polygon::disentangle():"
***************
*** 2408,2411 ****
--- 2423,2441 ----
  
      vector<Point> quad[4];
+    
+ 
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "In `Polygon::disentangle':"
+              << endl
+              << "`pv.size()' == " << pv.size()
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
  
      for (pv_iter = pv.begin(); pv_iter != pv.end(); ++pv_iter)
***************
*** 2431,2434 ****
--- 2461,2478 ----
      Compare_Angles cmp_ang_neg(&ORIGIN, &neg_x_axis_point);
  
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "In `Polygon::disentangle':"
+              << endl
+              << "Before `for' loop."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
      for (int i = 0; i < 4; ++i)
        { 
***************
*** 2449,2452 ****
--- 2493,2511 ----
  
  
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "In `Polygon::disentangle':"
+              << endl
+              << "After `for' loop."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
+ 
      pv.clear();
  
***************
*** 2491,2494 ****
--- 2550,2568 ----
      Bool_Point bp;
  
+ 
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "In `Polygon::disentangle':"
+              << endl
+              << "Before `do' loop."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
      do
         {
***************
*** 2497,2506 ****
--- 2571,2596 ----
            for (i = 0; i < pv_size - 2; ++i)
               {
+ 
                   j = (i + 1);
  
                   for (k = (i + 1); k < pv_size; ++k)
                      {
+ 
                         m = (k + 1) % pv_size;
  
+ #if DEBUG_COMPILE
+                         if (DEBUG)   
+                         {
+                             cerr_mutex.lock(); 
+                             cerr << "`i' == " << i << endl
+                                  << "`j' == " << j << endl 
+                                  << "`i' == " << k << endl 
+                                  << "`m' == " << m << endl 
+                                  << endl;
+                             cerr_mutex.unlock(); 
+ 
+                         }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
                         bp = Point::intersection_point(pv[i], pv[j],
                                                        pv[k], pv[m % pv_size]);
***************
*** 2523,2526 ****
--- 2613,2629 ----
        }  while (repeat);
  
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "In `Polygon::disentangle':"
+              << endl
+              << "After `do' loop."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
  
  
***************
*** 2537,2540 ****
--- 2640,2660 ----
         }
  
+ 
+ @q **** (4) @>
+ 
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "Exiting `Polygon::disentangle' successfully "
+              << "with return value `poly'."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
+ 
      poly->set_cycle();
  
***************
*** 2663,2667 ****
  @<Define |Polygon| functions@>=
  
!    if (p0 == 0 || p1 == 0 || pv == 0)
        {  
            cerr_strm << thread_name << "ERROR!  "
--- 2783,2789 ----
  @<Define |Polygon| functions@>=
  
!    if (   p0 == static_cast<Point*>(0) 
!        || p1 == static_cast<Point*>(0) 
!        || pv == static_cast<Pointer_Vector<Polygon>*>(0))
        {  
            cerr_strm << thread_name << "ERROR!  "
***************
*** 2911,2915 ****
  @<Define |Polygon| functions@>=
  
!    if (fill_color_vector != 0 && fill_color_vector->ctr > 0)
        {
            for (vector<Color*>::iterator iter = fill_color_vector->v.begin();
--- 3033,3038 ----
  @<Define |Polygon| functions@>=
  
!    if (   fill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!        && fill_color_vector->ctr > 0)
        {
            for (vector<Color*>::iterator iter = fill_color_vector->v.begin();
***************
*** 3737,3741 ****
  @q ***** (5).@> 
  
!          if (pvp != 0)
              {
  
--- 3860,3864 ----
  @q ***** (5).@> 
  
!          if (pvp != static_cast<Pointer_Vector<Polygon>*>(0))
              {
  
***************
*** 4107,4111 ****
    if (DEBUG)
      cerr << "Entering Reg_Polygon::Reg_Polygon() "
!          << "(center, sides, diameter, angles).\n" << flush;
  
    shape_type = REG_POLYGON_TYPE;
--- 4230,4234 ----
    if (DEBUG)
      cerr << "Entering Reg_Polygon::Reg_Polygon() "
!          << "(center, sides, diameter, angles).\n";
  
    shape_type = REG_POLYGON_TYPE;
***************
*** 4142,4153 ****
  
        
  
!       if (angle_x != 0 || angle_y != 0
!           || angle_z != 0) /* Rotation around the x-axis, y-axis, and z-axis, if
!                               applicable. */ 
          vertex->rotate(angle_x, angle_y, angle_z);
  
- 
- 
        vertex->shift(center);  /* Put in position around |center|. */
        points.push_back(vertex);
--- 4265,4273 ----
  
        
+       /* Rotation around the x-axis, y-axis, and z-axis, if applicable. */ 
  
!       if (angle_x != ZERO_REAL || angle_y != ZERO_REAL || angle_z != ZERO_REAL) 
          vertex->rotate(angle_x, angle_y, angle_z);
  
        vertex->shift(center);  /* Put in position around |center|. */
        points.push_back(vertex);
***************
*** 4155,4159 ****
    if (DEBUG)
      cerr << "Exiting Reg_Polygon::Reg_Polygon() "
!          << "(center, sides, diameter, angles).\n" << flush;
    return;
  }
--- 4275,4279 ----
    if (DEBUG)
      cerr << "Exiting Reg_Polygon::Reg_Polygon() "
!          << "(center, sides, diameter, angles).\n";
    return;
  }
***************
*** 4183,4187 ****
    if (DEBUG)
      cerr << "Entering Reg_Polygon::set() "
!          << "(center, sides, diameter, angles).\n" << flush;
  
  @ @:??@> ?? \initials{LDF 2002.10.07.}  At exactly this place, |Path::Path| (the 
--- 4303,4307 ----
    if (DEBUG)
      cerr << "Entering Reg_Polygon::set() "
!          << "(center, sides, diameter, angles).\n";
  
  @ @:??@> ?? \initials{LDF 2002.10.07.}  At exactly this place, |Path::Path| (the 
***************
*** 4198,4202 ****
    if (DEBUG)
      cerr << "Exiting Reg_Polygon::set() "
!          << "(center, sides, diameter, angles).\n" << flush;
    return;
  
--- 4318,4322 ----
    if (DEBUG)
      cerr << "Exiting Reg_Polygon::set() "
!          << "(center, sides, diameter, angles).\n";
    return;
  
***************
*** 4374,4379 ****
     if (DEBUG)
       {
!        cerr << "internal_angle == " << internal_angle << endl << flush;
!        cerr << "sides == " << sides << endl << flush;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 4494,4499 ----
     if (DEBUG)
       {
!        cerr << "internal_angle == " << internal_angle << endl;
!        cerr << "sides == " << sides << endl;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 4441,4446 ****
  int
  Reg_Polygon::reflect_in(const Plane& p, 
!                     void* v,
!                     const Scanner_Node scanner_node) const
  
  
--- 4561,4566 ----
  int
  Reg_Polygon::reflect_in(const Plane& p, 
!                         void* v,
!                         const Scanner_Node scanner_node) const
  
  
***************
*** 4478,4482 ****
  @<Define |Reg_Polygon| functions@>=
  
!  if (reg_polygon_reflection == 0)
   {
    try
--- 4598,4602 ----
  @<Define |Reg_Polygon| functions@>=
  
!  if (reg_polygon_reflection == static_cast<Reg_Polygon*>(0))
   {
    try
diff -rc2P 3DLDF-2.0.2/src/polyhed.web 3DLDF-2.0.3/src/polyhed.web
*** 3DLDF-2.0.2/src/polyhed.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/polyhed.web	Fri Dec 13 14:07:19 2013
***************
*** 288,292 ****
  @<Define |Polyhedron| functions@>=
  
!  if (polyhedron_reflection == 0)
   {
    try
--- 288,292 ----
  @<Define |Polyhedron| functions@>=
  
!  if (polyhedron_reflection == static_cast<Polyhedron*>(0))
   {
    try
***************
*** 658,661 ****
--- 658,673 ----
                                                     &warning_stop_value);
  
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "Entering `Polyhedron::intersection'."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
  @q **** (4)@> 
  @
***************
*** 754,762 ****
                                                        suppress_warnings));
  
      return poly;
  
  @q **** (4)@> 
  
! }  /* End of |Polyhedron::intersection_points(const Plane& p, [etc.])| 
        definition.  */
  
--- 766,788 ----
                                                        suppress_warnings));
  
+ 
+ #if DEBUG_COMPILE
+     if (DEBUG)
+     {
+         cerr_mutex.lock(); 
+         cerr << thread_name << "Exiting `Polyhedron::intersection' "
+              << "with return value `poly'."
+              << endl;
+         cerr_mutex.unlock(); 
+ 
+     }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
      return poly;
  
  @q **** (4)@> 
  
! }  /* End of |Polyhedron::intersection(const Plane& p, [etc.])| 
        definition.  */
  
***************
*** 811,815 ****
          {
            v = (**iter0).intersection_points(**iter1);
!           cerr << "v.size() == " << v.size() << endl << flush;
            for (vector<Point>::iterator pt_iter = v.begin();
                 pt_iter != v.end();
--- 837,841 ----
          {
            v = (**iter0).intersection_points(**iter1);
!           cerr << "v.size() == " << v.size() << endl;
            for (vector<Point>::iterator pt_iter = v.begin();
                 pt_iter != v.end();
***************
*** 1063,1072 ****
    Point P2 = P0 - pts[1];
    P1.show("P1");
!   cerr << "  P1.magnitude() == " <<   P1.magnitude() << endl << flush;
    P2.show("P2");
!   cerr << "P2.magnitude() == " << P2.magnitude() << endl << flush;
    distance = (P2.magnitude() / P1.magnitude());
    cerr.precision(25);
!   cerr << "distance == " << distance << endl << flush;
    cerr.precision(6);
  #endif 
--- 1089,1098 ----
    Point P2 = P0 - pts[1];
    P1.show("P1");
!   cerr << "  P1.magnitude() == " <<   P1.magnitude() << endl;
    P2.show("P2");
!   cerr << "P2.magnitude() == " << P2.magnitude() << endl;
    distance = (P2.magnitude() / P1.magnitude());
    cerr.precision(25);
!   cerr << "distance == " << distance << endl;
    cerr.precision(6);
  #endif 
***************
*** 1082,1086 ****
    center.shift(-center);
  
!   if (angle_x != 0 || angle_y != 0 || angle_z != 0)
      {
        for(i = 0; i < 4; ++i)
--- 1108,1112 ----
    center.shift(-center);
  
!   if (angle_x != ZERO_REAL || angle_y != ZERO_REAL || angle_z != ZERO_REAL)
      {
        for(i = 0; i < 4; ++i)
***************
*** 1372,1376 ****
    Path p[6];
  
!   p[0].set("--", true, &pts[6], &pts[10], &pts[11], &pts[7], 0);
  
    p[0].draw(picture);
--- 1398,1402 ----
    Path p[6];
  
!   p[0].set("--", true, &pts[6], &pts[10], &pts[11], &pts[7], static_cast<Point*>(0));
  
    p[0].draw(picture);
***************
*** 1607,1611 ****
  @<Define |Tetrahedron| functions@>=
  
!  if (tetrahedron_reflection == 0)
   {
    try
--- 1633,1637 ----
  @<Define |Tetrahedron| functions@>=
  
!  if (tetrahedron_reflection == static_cast<Tetrahedron*>(0))
   {
    try
***************
*** 2418,2422 ****
  @<Define |Octahedron| functions@>=
  
!  if (octahedron_reflection == 0)
   {
    try
--- 2444,2448 ----
  @<Define |Octahedron| functions@>=
  
!  if (octahedron_reflection == static_cast<Octahedron*>(0))
   {
    try
***************
*** 2703,2707 ****
      bool DEBUG = false; /* |true| */
      if (DEBUG)
!       cerr << "Entering Icosahedron::Icosahedron().\n" << flush;
  
      shape_type = ICOSAHEDRON_TYPE;
--- 2729,2733 ----
      bool DEBUG = false; /* |true| */
      if (DEBUG)
!       cerr << "Entering Icosahedron::Icosahedron().\n";
  
      shape_type = ICOSAHEDRON_TYPE;
***************
*** 2822,2826 ****
      center = origin_pt;
  
!     if (angle_x != 0 || angle_y != 0 || angle_z != 0)
        for(vector<Reg_Polygon*>::iterator iter = reg_polygons.begin();
            iter != reg_polygons.end(); ++iter)
--- 2848,2852 ----
      center = origin_pt;
  
!     if (angle_x != ZERO_REAL || angle_y != ZERO_REAL || angle_z != ZERO_REAL)
        for(vector<Reg_Polygon*>::iterator iter = reg_polygons.begin();
            iter != reg_polygons.end(); ++iter)
***************
*** 2839,2843 ****
      if (DEBUG)
        {
!           cerr << "Exiting Icosahedron::Icosahedron().\n" << flush;
        }
      return;
--- 2865,2869 ----
      if (DEBUG)
        {
!           cerr << "Exiting Icosahedron::Icosahedron().\n";
        }
      return;
***************
*** 3018,3026 ****
          {
            for (int j = 0; j < 3; j++)
!             if (triangles[i]->get_point(j).get_y() != 0)
                {
                  cerr << "ERROR! In Icosahedron::get_net():\n"
                    << "y-coordinate != 0!\n"
!                     << "You'd better fix this!\n\n" << flush;
                }
          }
--- 3044,3052 ----
          {
            for (int j = 0; j < 3; j++)
!             if (triangles[i]->get_point(j).get_y() != ZERO_REAL)
                {
                  cerr << "ERROR! In Icosahedron::get_net():\n"
                    << "y-coordinate != 0!\n"
!                     << "You'd better fix this!\n\n";
                }
          }
***************
*** 3057,3065 ****
      {
        for (int j = 0; j < 3; j++)
!         if (triangles[i]->get_point(j).get_y() != 0)
            {
              cerr << "ERROR! In Icosahedron::get_net():\n"
                << "y-coordinate != 0!\n"
!                 << "You'd better fix this!\n\n" << flush;
            }
      }
--- 3083,3091 ----
      {
        for (int j = 0; j < 3; j++)
!         if (triangles[i]->get_point(j).get_y() != ZERO_REAL)
            {
              cerr << "ERROR! In Icosahedron::get_net():\n"
                << "y-coordinate != 0!\n"
!                 << "You'd better fix this!\n\n";
            }
      }
***************
*** 3185,3189 ****
  #endif 
  
!   p[0].set("--", true, &pts[3], &pts[9], &pts[10], &pts[4], 0);
  
    p[1] = p[2] = p[3] = p[4] = p[5] = p[0];
--- 3211,3215 ----
  #endif 
  
!   p[0].set("--", true, &pts[3], &pts[9], &pts[10], &pts[4], static_cast<Point*>(0));
  
    p[1] = p[2] = p[3] = p[4] = p[5] = p[0];
***************
*** 3301,3305 ****
  @<Define |Icosahedron| functions@>=
  
!  if (icosahedron_reflection == 0)
   {
    try
--- 3327,3331 ----
  @<Define |Icosahedron| functions@>=
  
!  if (icosahedron_reflection == static_cast<Icosahedron*>(0))
   {
    try
diff -rc2P 3DLDF-2.0.2/src/popassgn.w 3DLDF-2.0.3/src/popassgn.w
*** 3DLDF-2.0.2/src/popassgn.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/popassgn.w	Fri Dec 13 14:15:26 2013
***************
*** 130,134 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
   
--- 130,134 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
   
***************
*** 153,157 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 153,157 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 184,188 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 184,188 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 215,219 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
   
--- 215,219 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
   
***************
*** 238,242 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 238,242 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 270,274 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 270,274 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 301,305 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
   
--- 301,305 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
   
***************
*** 324,328 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 324,328 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 356,360 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 356,360 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 386,394 ****
  @<Define rules@>=
  
!    if (@=$3@> == 0)
!       {
! 
! 
!       } /* |if (@=$3@> == 0)|  */
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
--- 386,391 ----
  @<Define rules@>=
  
!    if (@=$3@> == ZERO_REAL)
!    ;   /* Do nothing  */
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
***************
*** 399,407 ****
  @<Define rules@>=
  
!    else if (entry == 0)
!       {
!  
!       } /* |else if (entry == 0)|  */
! 
  
  @q ***** (5) |$3 != 0 && entry != 0|.@>   
--- 396,401 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
!    ;  /* Do nothing  */ 
  
  @q ***** (5) |$3 != 0 && entry != 0|.@>   
***************
*** 422,426 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 416,420 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 453,457 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 447,451 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 497,505 ****
  
  
!    if (c == 0)
!       {
! 
! 
!       } /* |if (c == 0)|  */   
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
--- 491,496 ----
  
  
!    if (c == static_cast<Color*>(0))
!    ;
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
***************
*** 510,517 ****
  @<Define rules@>=
  
!    else if (entry == 0)
!       {
!  
!       } /* |else if (entry == 0)|  */
  
  
--- 501,506 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
!    ;
  
  
***************
*** 533,537 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 522,526 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 568,572 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 557,561 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 604,611 ****
  
  
!    if (c == 0)
!       {
! 
!       } /* |if (c == 0)|  */   
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
--- 593,598 ----
  
  
!    if (c == static_cast<Color*>(0))
!       ;  /* Do nothing  */ 
  
  @q ****** (6) Error handling:  |entry == 0|.@>   
***************
*** 616,623 ****
  @<Define rules@>=
  
!    else if (entry == 0)
!       {
!  
!       } /* |else if (entry == 0)|  */
  
  
--- 603,608 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
!    ; /* Do nothing  */
  
  
***************
*** 639,643 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 624,628 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 675,679 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 660,664 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 709,713 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
   
--- 694,698 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
   
***************
*** 732,740 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
!            {
! 
! 
!            } /* |if (entry->object == 0)|  */
  
  @q ****** (6).  |entry->object != 0|.@> 
--- 717,722 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
!          ; /* Do nothing  */ 
  
  @q ****** (6).  |entry->object != 0|.@> 
***************
*** 765,769 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 747,751 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 816,820 ****
  
  
!    if (r == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 798,802 ----
  
  
!    if (r == ZERO_REAL)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 842,846 ****
  @<Define rules@>=
  
!    else if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 824,828 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 876,880 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 858,862 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 921,925 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 903,907 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 979,983 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 961,965 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1013,1017 ****
  @<Define rules@>=
  
!          if (s == 0)
             {
  
--- 995,999 ----
  @<Define rules@>=
  
!          if (s == static_cast<string*>(0))
             {
  
***************
*** 1061,1065 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1043,1047 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1121,1125 ****
  
  
!    if (p == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1103,1107 ----
  
  
!    if (p == static_cast<Point*>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1144,1148 ****
  @<Define rules@>=
  
!    else if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1126,1130 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1178,1182 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 1160,1164 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 1227,1231 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1209,1213 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1299,1303 ****
  @<Define rules@>=
  
!    else if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1281,1285 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1333,1337 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 1315,1319 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 1382,1390 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
  
- 
  @q **** (4) operation_assignment --> point_variable @> 
  @q **** (4) TIMES_ASSIGN numeric_expression.        @>
--- 1364,1371 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
  
  @q **** (4) operation_assignment --> point_variable @> 
  @q **** (4) TIMES_ASSIGN numeric_expression.        @>
***************
*** 1431,1435 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1412,1416 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1465,1469 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 1446,1450 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 1510,1514 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1491,1495 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1560,1564 ****
  
  
!    if (r == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1541,1545 ----
  
  
!    if (r == ZERO_REAL)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1586,1590 ****
  @<Define rules@>=
  
!    else if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1567,1571 ----
  @<Define rules@>=
  
!    else if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1620,1624 ****
  @<Define rules@>=
  
!          if (entry->object == 0)
             {
  
--- 1601,1605 ----
  @<Define rules@>=
  
!          if (entry->object == static_cast<void*>(0))
             {
  
***************
*** 1665,1669 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1646,1650 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1736,1740 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 1717,1721 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 1819,1823 ****
  @<Define rules@>=
  
!          if (q == 0)
             {
  
--- 1800,1804 ----
  @<Define rules@>=
  
!          if (q == static_cast<Path*>(0))
             {
  
***************
*** 1891,1895 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1872,1876 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1940,1944 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
  
--- 1921,1925 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 1978,1982 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 1959,1963 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2020,2024 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
--- 2001,2005 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 2047,2051 ****
  @<Define rules@>=
  
!          if (p == 0)
             {
  
--- 2028,2032 ----
  @<Define rules@>=
  
!          if (p == static_cast<Path*>(0))
             {
  
***************
*** 2083,2087 ****
  @q ****** (6).@>           
  
!          if (p != 0)
              p->set_cycle(true);
  
--- 2064,2068 ----
  @q ****** (6).@>           
  
!          if (p != static_cast<Path*>(0))
              p->set_cycle(true);
  
***************
*** 2101,2105 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2082,2086 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2140,2144 ****
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!    if (entry == 0)
        {
           /* Do nothing.  */          
--- 2121,2125 ----
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           /* Do nothing.  */          
***************
*** 2161,2165 ****
           Path* p = static_cast<Path*>(entry->object);
  
!          if (p != 0)
              {
                  p->set_cycle(false);
--- 2142,2146 ----
           Path* p = static_cast<Path*>(entry->object);
  
!          if (p != static_cast<Path*>(0))
              {
                  p->set_cycle(false);
***************
*** 2184,2188 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2165,2169 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2241,2245 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 2222,2226 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 2276,2280 ****
  @<Define rules@>=
  
!          if (q == 0)
             {
  
--- 2257,2261 ----
  @<Define rules@>=
  
!          if (q == static_cast<Nurb*>(0))
             {
  
***************
*** 2326,2330 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2307,2311 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2375,2379 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 2356,2360 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 2408,2412 ****
  @<Define rules@>=
  
!          if (q == 0)
             {
  
--- 2389,2393 ----
  @<Define rules@>=
  
!          if (q == static_cast<Nurb*>(0))
             {
  
***************
*** 2456,2460 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2437,2441 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2603,2607 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 2584,2588 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 2670,2674 ****
  @<Define rules@>=
  
!          if (q == 0)
           {
  
--- 2651,2655 ----
  @<Define rules@>=
  
!          if (q == static_cast<Sphere_Development*>(0))
           {
  
***************
*** 2718,2722 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2699,2703 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2759,2763 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
--- 2740,2744 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 2773,2777 ****
           Parabola* p = static_cast<Parabola*>(entry->object);
  
!          if (p == 0)
             {
  
--- 2754,2758 ----
           Parabola* p = static_cast<Parabola*>(entry->object);
  
!          if (p == static_cast<Parabola*>(0))
             {
  
***************
*** 2784,2788 ****
  
  
!          if (p != 0)
              p->set_cycle(true);
  
--- 2765,2769 ----
  
  
!          if (p != static_cast<Parabola*>(0))
              p->set_cycle(true);
  
***************
*** 2796,2800 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2777,2781 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2825,2829 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
  
--- 2806,2810 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 2839,2843 ****
           Parabola* p = static_cast<Parabola*>(entry->object);
  
!          if (p == 0)
             {
  
--- 2820,2824 ----
           Parabola* p = static_cast<Parabola*>(entry->object);
  
!          if (p == static_cast<Parabola*>(0))
             {
  
***************
*** 2850,2854 ****
  
  
!          if (p != 0)
              p->set_cycle(false);
  
--- 2831,2835 ----
  
  
!          if (p != static_cast<Parabola*>(0))
              p->set_cycle(false);
  
***************
*** 2862,2872 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
  
  
- 
- 
  @q *** (3) |rectangles|.@>  
  
--- 2843,2851 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
  
  
  @q *** (3) |rectangles|.@>  
  
***************
*** 2923,2927 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 2902,2906 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 2958,2962 ****
  @<Define rules@>=
  
!          if (q == 0)
             {
  
--- 2937,2941 ----
  @<Define rules@>=
  
!          if (q == static_cast<Rectangle*>(0))
             {
  
***************
*** 3016,3020 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 2995,2999 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3054,3058 ****
                                           static_cast<Scanner_Node>(parameter));
  
!    @=$$@> = 0;
  
  };
--- 3033,3037 ----
                                           static_cast<Scanner_Node>(parameter));
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3186,3190 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3165,3169 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3343,3347 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3322,3326 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3471,3475 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3450,3454 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3593,3597 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3572,3576 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3719,3728 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
  
- 
- 
  @q *** (3) |color_vectors|.@>  
  
--- 3698,3705 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
  
  @q *** (3) |color_vectors|.@>  
  
***************
*** 3864,3868 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3841,3845 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3990,3994 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 3967,3971 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4056,4060 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
            cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
--- 4033,4037 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name << "ERROR!  In `yyparse()', rule "
***************
*** 4078,4082 ****
            delete direction; 
  
!           @=$$@> = 0;
            
        }  /* |if (entry == 0)|  */
--- 4055,4059 ----
            delete direction; 
  
!           @=$$@> = static_cast<void*>(0);
            
        }  /* |if (entry == 0)|  */
***************
*** 4209,4213 ****
                  delete direction; 
  
!                @=$$@> = 0;
   
              }  /* |if (status != 0)|  */
--- 4186,4190 ----
                  delete direction; 
  
!                @=$$@> = static_cast<void*>(0);
   
              }  /* |if (status != 0)|  */
***************
*** 4220,4224 ****
                  delete direction; 
   
!                 @=$$@> = 0;
  
             }  /* |else| (|status != 0|)  */
--- 4197,4201 ----
                  delete direction; 
   
!                 @=$$@> = static_cast<void*>(0);
  
             }  /* |else| (|status != 0|)  */
***************
*** 4370,4374 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 4347,4351 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4436,4440 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 4413,4417 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 4458,4462 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4435,4439 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4525,4529 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4502,4506 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4540,4544 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 4517,4521 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 4701,4705 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 4678,4682 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4826,4830 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 4803,4807 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4883,4887 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 4860,4864 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 4905,4909 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 4882,4886 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 4971,4975 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 4948,4952 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 4986,4990 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 4963,4967 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 5041,5045 ****
  
  
!     @=$$@> = 0;
  
  };
--- 5018,5022 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5079,5088 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5056,5065 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5103,5107 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 5080,5084 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 5228,5232 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 5205,5209 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5285,5289 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 5262,5266 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 5307,5311 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5284,5288 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5373,5377 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5350,5354 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5388,5392 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 5365,5369 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 5442,5446 ****
  
  
!     @=$$@> = 0;
  
  };
--- 5419,5423 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5480,5489 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5457,5466 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5504,5508 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 5481,5485 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 5551,5555 ****
  
  
!     @=$$@> = 0;
  
  };
--- 5528,5532 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5589,5598 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5566,5575 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5613,5617 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 5590,5594 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 5661,5665 ****
  
  
!     @=$$@> = 0;
  
  };
--- 5638,5642 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5698,5707 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5675,5684 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5723,5727 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 5700,5704 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 5774,5778 ****
  
  
!     @=$$@> = 0;
  
  };
--- 5751,5755 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 5832,5836 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 5809,5813 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 5854,5858 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 5831,5835 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 5920,5924 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 5897,5901 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 5935,5939 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 5912,5916 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 6068,6072 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 6045,6049 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 6125,6129 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 6102,6106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 6147,6151 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 6124,6128 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 6213,6217 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6190,6194 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6228,6232 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 6205,6209 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 6360,6364 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 6337,6341 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 6417,6421 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 6394,6398 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 6439,6443 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 6416,6420 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 6505,6509 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6482,6486 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6520,6524 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 6497,6501 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 6652,6656 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 6629,6633 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 6709,6713 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 6686,6690 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 6731,6735 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 6708,6712 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 6797,6801 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 6774,6778 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 6812,6816 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 6789,6793 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 6866,6870 ****
  
  
!     @=$$@> = 0;
  
  };
--- 6843,6847 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 6904,6913 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 6881,6890 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 6928,6932 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 6905,6909 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 6975,6979 ****
  
  
!     @=$$@> = 0;
  
  };
--- 6952,6956 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 7013,7022 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 6990,6999 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 7037,7041 ****
          delete pv;
  
!         @=$$@> = 0;
     }
  
--- 7014,7018 ----
          delete pv;
  
!         @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 7165,7169 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 7142,7146 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 7222,7226 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 7199,7203 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 7244,7248 ****
        delete pv;
  
!       @=$$@> = 0; 
  
      } /* |if (entry == 0)|  */
--- 7221,7225 ----
        delete pv;
  
!       @=$$@> = static_cast<void*>(0); 
  
      } /* |if (entry == 0)|  */
***************
*** 7310,7314 ****
              delete pv;
  
!             @=$$@> = 0;
  
           } /* |if (status != 0)|  */
--- 7287,7291 ----
              delete pv;
  
!             @=$$@> = static_cast<void*>(0);
  
           } /* |if (status != 0)|  */
***************
*** 7325,7329 ****
           delete pv;
  
!          @=$$@> = 0;
   
        }  /* |else| (|status == 0|)  */
--- 7302,7306 ----
           delete pv;
  
!          @=$$@> = static_cast<void*>(0);
   
        }  /* |else| (|status == 0|)  */
***************
*** 7460,7464 ****
  @<Define rules@>=
  
!   @=$$@> = 0;
  
  };
--- 7437,7441 ----
  @<Define rules@>=
  
!   @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/porgexpr.w 3DLDF-2.0.3/src/porgexpr.w
*** 3DLDF-2.0.2/src/porgexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/porgexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 156,165 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 156,165 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Origami_Figure>*>(0))
        {
  
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 177,181 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 177,181 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/porvexpr.w 3DLDF-2.0.3/src/porvexpr.w
*** 3DLDF-2.0.2/src/porvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/porvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppbvexpr.w 3DLDF-2.0.3/src/ppbvexpr.w
*** 3DLDF-2.0.2/src/ppbvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppbvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 115,119 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 115,119 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 132,136 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 132,136 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppdvexpr.w 3DLDF-2.0.3/src/ppdvexpr.w
*** 3DLDF-2.0.2/src/ppdvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppdvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 99,106 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 99,106 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppenexpr.w 3DLDF-2.0.3/src/ppenexpr.w
*** 3DLDF-2.0.2/src/ppenexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppenexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 90,94 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 90,94 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 225,233 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 225,233 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Pen>*>(0))
        {
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 245,249 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 245,249 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppgvexpr.w 3DLDF-2.0.3/src/ppgvexpr.w
*** 3DLDF-2.0.2/src/ppgvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppgvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 115,119 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 115,119 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 132,136 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 132,136 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 446,450 ****
        {
           
!           @=$$@> = 0;
  
        }  /* |if (status != 0)|  */
--- 446,450 ----
        {
           
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (status != 0)|  */
***************
*** 592,596 ****
     if (status != 0)
        {
!           @=$$@> = 0;
          
        }  /* |if (status != 0)|  */
--- 592,596 ----
     if (status != 0)
        {
!           @=$$@> = static_cast<void*>(0);
          
        }  /* |if (status != 0)|  */
***************
*** 657,661 ****
     if (status != 0)
        {
!           @=$$@> = 0;
          
        }  /* |if (status != 0)|  */
--- 657,661 ----
     if (status != 0)
        {
!           @=$$@> = static_cast<void*>(0);
          
        }  /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pphdexpr.w 3DLDF-2.0.3/src/pphdexpr.w
*** 3DLDF-2.0.2/src/pphdexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pphdexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 104,108 ****
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 104,108 ----
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 224,228 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 224,228 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Polyhedron>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 241,245 ****
            delete t;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 241,245 ----
            delete t;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 269,273 ****
            delete t;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 269,273 ----
            delete t;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pphvexpr.w 3DLDF-2.0.3/src/pphvexpr.w
*** 3DLDF-2.0.2/src/pphvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pphvexpr.w	Fri Dec 13 11:59:35 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 358,362 ****
    if (status != 0)
       {
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 358,362 ----
    if (status != 0)
       {
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
***************
*** 476,480 ****
     {
        
!        @=$$@> = 0;
  
     }  /* |if (status != 0)|  */
--- 476,480 ----
     {
        
!        @=$$@> = static_cast<void*>(0);
  
     }  /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppicexpr.w 3DLDF-2.0.3/src/ppicexpr.w
*** 3DLDF-2.0.2/src/ppicexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppicexpr.w	Fri Dec 13 13:26:05 2013
***************
*** 100,104 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0)
      {
  
--- 100,104 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 118,122 ****
  
  @<Define rules@>=
!   else if (entry->object == 0)
      {
        entry->known_state = Id_Map_Entry_Type::KNOWN;
--- 118,122 ----
  
  @<Define rules@>=
!   else if (entry->object == static_cast<void*>(0))
      {
        entry->known_state = Id_Map_Entry_Type::KNOWN;
diff -rc2P 3DLDF-2.0.2/src/pplhdslc.w 3DLDF-2.0.3/src/pplhdslc.w
*** 3DLDF-2.0.2/src/pplhdslc.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pplhdslc.w	Fri Dec 13 11:59:35 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
diff -rc2P 3DLDF-2.0.2/src/pplnexpr.w 3DLDF-2.0.3/src/pplnexpr.w
*** 3DLDF-2.0.2/src/pplnexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pplnexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 89,93 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 89,93 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 138,142 ****
  
        if (v == INVALID_PLANE)
!          @=$$@> = 0;
        else
        {
--- 138,142 ----
  
        if (v == INVALID_PLANE)
!          @=$$@> = static_cast<void*>(0);
        else
        {
***************
*** 148,152 ****
     else
     {
!       @=$$@> = 0;
     }
  
--- 148,152 ----
     else
     {
!       @=$$@> = static_cast<void*>(0);
     }
  
***************
*** 372,376 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  #if 0 
--- 372,376 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Plane>*>(0))
        {
  #if 0 
***************
*** 391,395 ****
            c = 0;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 391,395 ----
            c = 0;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 421,425 ****
            c = 0;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 421,425 ----
            c = 0;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pplnvxpr.w 3DLDF-2.0.3/src/pplnvxpr.w
*** 3DLDF-2.0.2/src/pplnvxpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pplnvxpr.w	Fri Dec 13 11:59:34 2013
***************
*** 115,119 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 115,119 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 132,136 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 132,136 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pplvexpr.w 3DLDF-2.0.3/src/pplvexpr.w
*** 3DLDF-2.0.2/src/pplvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pplvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 307,311 ****
       {
  
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 307,311 ----
       {
  
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppntexpr.w 3DLDF-2.0.3/src/ppntexpr.w
*** 3DLDF-2.0.2/src/ppntexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppntexpr.w	Fri Dec 13 14:46:32 2013
***************
*** 133,140 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
       {
  
!         @=$$@> = 0;
  
       } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,140 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
       {
  
!         @=$$@> = static_cast<void*>(0);
  
       } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 503,508 ****
     Plane* q = static_cast<Plane*>(@=$4@>);
  
!    if (p == 0 || q == 0)
!       @=$$@> = 0;
     else
     {
--- 503,508 ----
     Plane* q = static_cast<Plane*>(@=$4@>);
  
!    if (p == static_cast<Point*>(0) || q == static_cast<Plane*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 542,547 ****
     Reg_Polygon* r = static_cast<Reg_Polygon*>(@=$4@>);
  
!    if (p == 0 || r == 0)
!       @=$$@> = 0;
     else
     {
--- 542,547 ----
     Reg_Polygon* r = static_cast<Reg_Polygon*>(@=$4@>);
  
!    if (p == static_cast<Point*>(0) || r == static_cast<Reg_Polygon*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 588,592 ****
     }
     else
!       @=$$@> = 0;
  
  };
--- 588,592 ----
     }
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 616,620 ****
  
     else
!       @=$$@> = 0;
  
  };
--- 616,620 ----
  
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 643,647 ****
     }
     else
!       @=$$@> = 0;
  
  };
--- 643,647 ----
     }
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 829,833 ****
         Point p = f->get_normal();
         if (p == INVALID_POINT)
!           @=$$@> = 0;
         else
            @=$$@> = static_cast<void*>(create_new<Point>(p));
--- 829,833 ----
         Point p = f->get_normal();
         if (p == INVALID_POINT)
!           @=$$@> = static_cast<void*>(0);
         else
            @=$$@> = static_cast<void*>(create_new<Point>(p));
***************
*** 836,840 ****
     }
     else
!       @=$$@> = 0;
  
  };
--- 836,840 ----
     }
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1033,1038 ****
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == 0)
!       @=$$@> = 0;
     else
     {
--- 1033,1038 ----
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == static_cast<Conic_Section_Lattice*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 1061,1066 ****
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == 0)
!       @=$$@> = 0;
     else
     {
--- 1061,1066 ----
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == static_cast<Conic_Section_Lattice*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 1089,1094 ****
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == 0)
!       @=$$@> = 0;
     else
     {
--- 1089,1094 ----
     Conic_Section_Lattice* c = static_cast<Conic_Section_Lattice*>(@=$2@>);
  
!    if (c == static_cast<Conic_Section_Lattice*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 1148,1152 ****
         delete scanner_node->conic_section_lattice_options;  
         scanner_node->conic_section_lattice_options = 0;
!        @=$$@> = 0;    
     }
  
--- 1148,1152 ----
         delete scanner_node->conic_section_lattice_options;  
         scanner_node->conic_section_lattice_options = 0;
!        @=$$@> = static_cast<void*>(0);    
     }
  
***************
*** 1211,1215 ****
          }
  
!         @=$$@> = 0;    
  
      }  /* |else|  */
--- 1211,1215 ----
          }
  
!         @=$$@> = static_cast<void*>(0);    
  
      }  /* |else|  */
***************
*** 1257,1261 ****
     }
     else
!       @=$$@> = 0;    
  };
  
--- 1257,1261 ----
     }
     else
!       @=$$@> = static_cast<void*>(0);    
  };
  
***************
*** 1318,1322 ****
  {
     
!     @=$$@> = 0;
  
  };
--- 1318,1322 ----
  {
     
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1339,1346 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_cull = true;      
  
!    @=$$@> = 0;
  };
  
--- 1339,1348 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_cull = true;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1362,1369 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
!       scanner_node->conic_section_lattice_options->do_cull = false;      
  
!    @=$$@> = 0;
  };
  
--- 1364,1373 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
!           scanner_node->conic_section_lattice_options->do_cull = false;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1387,1394 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
!       scanner_node->conic_section_lattice_options->tolerance = @=$2@>;      
  
!    @=$$@> = 0;
  };
  
--- 1391,1400 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
!        scanner_node->conic_section_lattice_options->tolerance = @=$2@>;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1428,1432 ****
     }
  
!    @=$$@> = 0;
  };
  
--- 1434,1438 ----
     }
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1460,1464 ****
     }
  
!    @=$$@> = 0;
  };
  
--- 1466,1470 ----
     }
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1503,1507 ****
  
     delete pv;
!    @=$$@> = 0;
  };
  
--- 1509,1513 ----
  
     delete pv;
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1544,1548 ****
  
     delete pv;
!    @=$$@> = 0;
  };
  
--- 1550,1554 ----
  
     delete pv;
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1564,1571 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_rectify = true;      
  
!    @=$$@> = 0;
  };
  
--- 1570,1579 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_rectify = true;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1587,1594 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_rectify = false;      
  
!    @=$$@> = 0;
  };
  
--- 1595,1604 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_rectify = false;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1613,1617 ****
          scanner_node->conic_section_lattice_options->do_shift = true;
  
!    @=$$@> = 0;
  };
  
--- 1623,1627 ----
          scanner_node->conic_section_lattice_options->do_shift = true;
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1636,1640 ****
          scanner_node->conic_section_lattice_options->do_shift = false;
  
!    @=$$@> = 0;
  };
  
--- 1646,1650 ----
          scanner_node->conic_section_lattice_options->do_shift = false;
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1656,1663 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_test = true;      
  
!    @=$$@> = 0;
  };
  
--- 1666,1675 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_test = true;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1679,1686 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_test = false;      
  
!    @=$$@> = 0;
  };
  
--- 1691,1700 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_test = false;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1703,1710 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
        scanner_node->conic_section_lattice_options->do_transform = true;      
  
!    @=$$@> = 0;
  };
  
--- 1717,1726 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
        scanner_node->conic_section_lattice_options->do_transform = true;      
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1728,1732 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
     {
        scanner_node->conic_section_lattice_options->do_transform = true;      
--- 1744,1750 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
     {
        scanner_node->conic_section_lattice_options->do_transform = true;      
***************
*** 1735,1739 ****
     }
  
!    @=$$@> = 0;
  };
  
--- 1753,1757 ----
     }
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1756,1765 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node != 0 && scanner_node->conic_section_lattice_options != 0)
     {
        scanner_node->conic_section_lattice_options->do_transform = false;      
     }
  
!    @=$$@> = 0;
  };
  
--- 1774,1785 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        &&    scanner_node->conic_section_lattice_options 
!           != static_cast<Conic_Section_Lattice_Options*>(0))
     {
        scanner_node->conic_section_lattice_options->do_transform = false;      
     }
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 2614,2618 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 2634,2638 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 2631,2635 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 2651,2655 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 2659,2663 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 2679,2683 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 2706,2710 ****
     Ellipse* e = static_cast<Ellipse*>(@=$3@>); 
  
!    if (e == 0)
        @=$$@> = static_cast<void*>(0); 
     else
--- 2726,2730 ----
     Ellipse* e = static_cast<Ellipse*>(@=$3@>); 
  
!    if (e == static_cast<Ellipse*>(0))
        @=$$@> = static_cast<void*>(0); 
     else
***************
*** 2810,2814 ****
  @<Define rules@>=
  
!   if (p == 0)
      {
         cerr_strm << thread_name << "ERROR! In `yyparse()', "
--- 2830,2834 ----
  @<Define rules@>=
  
!   if (p == static_cast<Point*>(0))
      {
         cerr_strm << thread_name << "ERROR! In `yyparse()', "
***************
*** 2864,2868 ****
  @<Define rules@>=
  
!             if (@=$3@> == 0)
                {
                  cerr_strm << thread_name 
--- 2884,2888 ----
  @<Define rules@>=
  
!             if (@=$3@> == ZERO_REAL)
                {
                  cerr_strm << thread_name 
***************
*** 3032,3036 ****
     Point* p = static_cast<Point*>(@=$3@>); 
  
!    if (p == 0)
        {
           cerr_strm << thread_name << "ERROR! In yyparse(), rule "
--- 3052,3056 ----
     Point* p = static_cast<Point*>(@=$3@>); 
  
!    if (p == static_cast<Point*>(0))
        {
           cerr_strm << thread_name << "ERROR! In yyparse(), rule "
***************
*** 3096,3100 ****
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    if (p == 0)
        {
           cerr_strm << thread_name << "ERROR! In yyparse(), rule "
--- 3116,3120 ----
     Point* p = static_cast<Point*>(@=$2@>); 
  
!    if (p == static_cast<Point*>(0))
        {
           cerr_strm << thread_name << "ERROR! In yyparse(), rule "
***************
*** 3199,3203 ****
  @<Define rules@>=
  
!   if (p == 0)
      {
        cerr_strm << thread_name << "ERROR! In `yyparse()',"
--- 3219,3223 ----
  @<Define rules@>=
  
!   if (p == static_cast<Point*>(0))
      {
        cerr_strm << thread_name << "ERROR! In `yyparse()',"
***************
*** 3216,3220 ****
        delete t;
  
!       @=$$@> = 0;
  
      }  /* |if (p == 0)|  */@;
--- 3236,3240 ----
        delete t;
  
!       @=$$@> = static_cast<void*>(0);
  
      }  /* |if (p == 0)|  */@;
***************
*** 3246,3250 ****
        delete t;
  
!       @=$$@> = 0;
  
      }  /* |if (p == 0 || *p == INVALID_POINT)|  */@;
--- 3266,3270 ----
        delete t;
  
!       @=$$@> = static_cast<void*>(0);
  
      }  /* |if (p == 0 || *p == INVALID_POINT)|  */@;
***************
*** 3268,3272 ****
  @<Define rules@>=
  
!   if (t == 0)
      {
  
--- 3288,3292 ----
  @<Define rules@>=
  
!   if (t == static_cast<Transform*>(0))
      {
  
***************
*** 3528,3532 ****
  @<Define rules@>=
  
!   if (p == 0)
      {
         cerr_strm << thread_name << "ERROR!  In yyparse(), rule "
--- 3548,3552 ----
  @<Define rules@>=
  
!   if (p == static_cast<Point*>(0))
      {
         cerr_strm << thread_name << "ERROR!  In yyparse(), rule "
***************
*** 3546,3550 ****
          @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT));
  
!         if (q != 0)
             delete q;
  
--- 3566,3570 ----
          @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT));
  
!         if (q != static_cast<Point*>(0))
             delete q;
  
***************
*** 3556,3560 ****
  @<Define rules@>=
  
!   else if (q == 0)
      {
         cerr_strm << thread_name << "ERROR! In yyparse(), rule "
--- 3576,3580 ----
  @<Define rules@>=
  
!   else if (q == static_cast<Point*>(0))
      {
         cerr_strm << thread_name << "ERROR! In yyparse(), rule "
***************
*** 3573,3577 ****
         @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT)); 
  
!        if (p != 0)
           delete p;
  
--- 3593,3597 ----
         @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT)); 
  
!        if (p != static_cast<Point*>(0))
           delete p;
  
***************
*** 3634,3638 ****
  @<Define rules@>=
  
!   if (p == 0)
      {
         cerr_strm << thread_name << "ERROR!  In yyparse(), rule "
--- 3654,3658 ----
  @<Define rules@>=
  
!   if (p == static_cast<Point*>(0))
      {
         cerr_strm << thread_name << "ERROR!  In yyparse(), rule "
***************
*** 3652,3656 ****
          @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT));
  
!         if (q != 0)
             delete q;
  
--- 3672,3676 ----
          @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT));
  
!         if (q != static_cast<Point*>(0))
             delete q;
  
***************
*** 3662,3666 ****
  @<Define rules@>=
  
!   else if (q == 0)
      {
         cerr_strm << thread_name << "ERROR! In yyparse(), rule "
--- 3682,3686 ----
  @<Define rules@>=
  
!   else if (q == static_cast<Point*>(0))
      {
         cerr_strm << thread_name << "ERROR! In yyparse(), rule "
***************
*** 3679,3683 ****
         @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT)); 
  
!        if (p != 0)
           delete p;
  
--- 3699,3703 ----
         @=$$@> = static_cast<void*>(create_new<Point>(&INVALID_POINT)); 
  
!        if (p != static_cast<Point*>(0))
           delete p;
  
diff -rc2P 3DLDF-2.0.2/src/ppnvexpr.w 3DLDF-2.0.3/src/ppnvexpr.w
*** 3DLDF-2.0.2/src/ppnvexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/ppnvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 101,108 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 101,108 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pprbexpr.w 3DLDF-2.0.3/src/pprbexpr.w
*** 3DLDF-2.0.2/src/pprbexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pprbexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 103,107 ****
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 103,107 ----
    entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 223,227 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 223,227 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Parabola>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 240,244 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 240,244 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 268,272 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 268,272 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 334,338 ****
  
     @=$$@> = (c) ?  c->get_parabola(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = 0;
  
  };
--- 334,338 ----
  
     @=$$@> = (c) ?  c->get_parabola(static_cast<Scanner_Node>(parameter))
!                 :  @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pprdexpr.w 3DLDF-2.0.3/src/pprdexpr.w
*** 3DLDF-2.0.2/src/pprdexpr.w	Thu Nov  7 13:36:04 2013
--- 3DLDF-2.0.3/src/pprdexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 89,93 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 89,93 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Paraboloid>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 176,180 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 176,180 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pprgstmt.w 3DLDF-2.0.3/src/pprgstmt.w
*** 3DLDF-2.0.2/src/pprgstmt.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pprgstmt.w	Fri Dec 13 14:23:05 2013
***************
*** 164,168 ****
  \LOG
  @:BUG FIX@> BUG FIX:  Now checking 
! that |scanner_node != 0 && scanner_node->thread_info != 0| before 
  setting |thread_name = scanner_node->thread_info->name|.
  \ENDLOG 
--- 164,168 ----
  \LOG
  @:BUG FIX@> BUG FIX:  Now checking 
! that |scanner_node != 0 && scanner_node->thread_info != static_cast<Thread_Info_Type*>(0)| before 
  setting |thread_name = scanner_node->thread_info->name|.
  \ENDLOG 
***************
*** 173,177 ****
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != 0 && scanner_node->thread_info != 0
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
--- 173,178 ----
  
  #ifdef HAVE_PTHREAD_H  
!    if (   scanner_node != static_cast<Scanner_Node>(0) 
!        && scanner_node->thread_info != static_cast<Thread_Info_Type*>(0)
         && (   scanner_node->run_state.multithread_input 
             || scanner_node->run_state.multithread_output))      
***************
*** 261,265 ****
  
  
!   if (   scanner_node->in->up != 0
        && !(   scanner_node->run_state.multithread_input
             || scanner_node->run_state.multithread_include))
--- 262,266 ----
  
  
!   if (   scanner_node->in->up != static_cast<Input_Struct*>(0)
        && !(   scanner_node->run_state.multithread_input
             || scanner_node->run_state.multithread_include))
***************
*** 268,272 ****
        Input_Struct* up = scanner_node->in->up;
  
!       while (up != 0)
          {
            delete scanner_node->in;
--- 269,273 ----
        Input_Struct* up = scanner_node->in->up;
  
!       while (up != static_cast<Input_Struct*>(0))
          {
            delete scanner_node->in;
diff -rc2P 3DLDF-2.0.2/src/ppthexpr.w 3DLDF-2.0.3/src/ppthexpr.w
*** 3DLDF-2.0.2/src/ppthexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ppthexpr.w	Fri Dec 13 14:32:35 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 162,166 ****
  @<Define rules@>=
  
!        if (p == 0)
            {
  
--- 162,166 ----
  @<Define rules@>=
  
!        if (p == static_cast<Path*>(0))
            {
  
***************
*** 348,358 ****
             << "`path_primary' on the right-hand side "
             << endl << "and proceeding with fingers crossed."
!            << endl << flush; 
  
  
        if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
          {
!           cerr << "Type <RETURN> to continue.\n"
!                << flush;  
            getchar();  /* Don't delete this!  */@;  
          }  
--- 348,358 ----
             << "`path_primary' on the right-hand side "
             << endl << "and proceeding with fingers crossed."
!            << endl; 
  
  
        if (scanner_node->run_state.error_stop_mode == Run_State::STOPPING)
          {
!           cerr << "Type <RETURN> to continue.\n";  
! 
            getchar();  /* Don't delete this!  */@;  
          }  
***************
*** 693,697 ****
  
  
!    @=$$@> = 0;
  
  };
--- 693,697 ----
  
  
!    @=$$@> = ZERO_REAL;
  
  };
***************
*** 890,894 ****
  @<Define rules@>=
  
!   if (t == 0)
     {
        cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 890,894 ----
  @<Define rules@>=
  
!   if (t == static_cast<const Path*>(0))
     {
        cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 907,911 ****
        delete s;
  
!       @=$$@> = 0;
  
     } /* |if (t == 0)|  */
--- 907,911 ----
        delete s;
  
!       @=$$@> = static_cast<void*>(0);
  
     } /* |if (t == 0)|  */
***************
*** 1114,1118 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 1114,1118 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Path>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 1131,1135 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 1131,1135 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 1159,1163 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 1159,1163 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 1226,1230 ****
  @q ****** (6).@> 
  
!    if (n == 0)
        {
            cerr_strm << thread_name 
--- 1226,1230 ----
  @q ****** (6).@> 
  
!    if (n == static_cast<Nurb*>(0))
        {
            cerr_strm << thread_name 
***************
*** 1241,1245 ****
            cerr_strm.str("");         
  
!           @=$$@> = 0;       
  
        }  /* |if (n == 0)|  */
--- 1241,1245 ----
            cerr_strm.str("");         
  
!           @=$$@> = static_cast<void*>(0);       
  
        }  /* |if (n == 0)|  */
***************
*** 1314,1318 ****
                   cerr_strm.str("");         
  
!                  @=$$@> = 0;
       
              }  /* |if (status != 0)|  */
--- 1314,1318 ----
                   cerr_strm.str("");         
  
!                  @=$$@> = static_cast<void*>(0);
       
              }  /* |if (status != 0)|  */
***************
*** 1392,1397 ****
  @=conic_section_lattice_expression with_conic_section_lattice_option_list@>@/
  {
!    if (@=$4@> == 0)
!       @=$$@> = 0;
     else
     {
--- 1392,1397 ----
  @=conic_section_lattice_expression with_conic_section_lattice_option_list@>@/
  {
!    if (@=$4@> == static_cast<void*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
diff -rc2P 3DLDF-2.0.2/src/pptvexpr.w 3DLDF-2.0.3/src/pptvexpr.w
*** 3DLDF-2.0.2/src/pptvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pptvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 226,230 ****
     }
     else
!        @=$$@> = 0;    
  };
  
--- 226,230 ----
     }
     else
!        @=$$@> = static_cast<void*>(0);    
  };
  
***************
*** 540,544 ****
        {
  
!           @=$$@> = 0;
         
        }  /* |if (status != 0)|  */
--- 540,544 ----
        {
  
!           @=$$@> = static_cast<void*>(0);
         
        }  /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ppygexpr.w 3DLDF-2.0.3/src/ppygexpr.w
*** 3DLDF-2.0.2/src/ppygexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ppygexpr.w	Fri Dec 13 14:26:20 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 136,141 ****
  {
  
!    if (@=$2@> == 0)
!       @=$$@> = 0;
     else
     {
--- 136,141 ----
  {
  
!    if (@=$2@> == static_cast<void*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 162,167 ****
  {
  
!    if (@=$2@> == 0)
!       @=$$@> = 0;
     else
     {
--- 162,167 ----
  {
  
!    if (@=$2@> == static_cast<void*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 188,193 ****
  {
  
!    if (@=$2@> == 0)
!       @=$$@> = 0;
     else
     {
--- 188,193 ----
  {
  
!    if (@=$2@> == static_cast<void*>(0))
!       @=$$@> = static_cast<void*>(0);
     else
     {
***************
*** 256,265 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 256,265 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Polygon>*>(0))
        {
  
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 276,280 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 276,280 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 470,474 ****
  
     if (!(c && p))
!       @=$$@> = 0;
     else
       @=$$@> = static_cast<void*>(c->intersection(*p, 
--- 470,474 ----
  
     if (!(c && p))
!       @=$$@> = static_cast<void*>(0);
     else
       @=$$@> = static_cast<void*>(c->intersection(*p, 
***************
*** 503,507 ****
  
     if (!(c && p))
!       @=$$@> = 0;
     else
       @=$$@> = static_cast<void*>(c->intersection(*p, 
--- 503,507 ----
  
     if (!(c && p))
!       @=$$@> = static_cast<void*>(0);
     else
       @=$$@> = static_cast<void*>(c->intersection(*p, 
***************
*** 536,540 ****
  
     if (!(p && q))
!       @=$$@> = 0;
     else
       @=$$@> = static_cast<void*>(p->intersection(*q, 
--- 536,540 ----
  
     if (!(p && q))
!       @=$$@> = static_cast<void*>(0);
     else
       @=$$@> = static_cast<void*>(p->intersection(*q, 
***************
*** 569,573 ****
  
     if (!(p && q))
!       @=$$@> = 0;
     else
       @=$$@> = static_cast<void*>(p->intersection(*q, 
--- 569,573 ----
  
     if (!(p && q))
!       @=$$@> = static_cast<void*>(0);
     else
       @=$$@> = static_cast<void*>(p->intersection(*q, 
diff -rc2P 3DLDF-2.0.2/src/prcvexpr.w 3DLDF-2.0.3/src/prcvexpr.w
*** 3DLDF-2.0.2/src/prcvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/prcvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 298,302 ****
       {
  
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 298,302 ----
       {
  
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/precexpr.w 3DLDF-2.0.3/src/precexpr.w
*** 3DLDF-2.0.2/src/precexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/precexpr.w	Fri Dec 13 14:26:49 2013
***************
*** 94,98 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 94,98 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 188,192 ****
  @<Define rules@>=
  
!   if (t == 0)
     {
        cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
--- 188,192 ----
  @<Define rules@>=
  
!   if (t == static_cast<const Rectangle*>(0))
     {
        cerr_strm << thread_name << "ERROR! In `yyparse()', rule "
***************
*** 205,209 ****
        delete s;
  
!       @=$$@> = 0;
  
     } /* |if (t == 0)|  */
--- 205,209 ----
        delete s;
  
!       @=$$@> = static_cast<void*>(0);
  
     } /* |if (t == 0)|  */
***************
*** 309,313 ****
     }
     else 
!       @=$$@> = 0;
  
  };
--- 309,313 ----
     }
     else 
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 345,349 ****
     }
     else
!       @=$$@> = 0;
  
  };
--- 345,349 ----
     }
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 447,451 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 447,451 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Rectangle>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 464,468 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 464,468 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 492,496 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 492,496 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 545,549 ****
  
        if (r.size() != 4)
!          @=$$@> = 0;
        else
           @=$$@> = static_cast<void*>(create_new<Rectangle>(r)); 
--- 545,549 ----
  
        if (r.size() != 4)
!          @=$$@> = static_cast<void*>(0);
        else
           @=$$@> = static_cast<void*>(create_new<Rectangle>(r)); 
***************
*** 553,557 ****
     else
     {
!       @=$$@> = 0;
     }
  
--- 553,557 ----
     else
     {
!       @=$$@> = static_cast<void*>(0);
     }
  
diff -rc2P 3DLDF-2.0.2/src/predctes.web 3DLDF-2.0.3/src/predctes.web
*** 3DLDF-2.0.2/src/predctes.web	Thu Nov  7 13:36:08 2013
--- 3DLDF-2.0.3/src/predctes.web	Wed Dec 11 18:52:33 2013
***************
*** 268,272 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 268,272 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 376,380 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 376,380 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
diff -rc2P 3DLDF-2.0.2/src/prelims.web 3DLDF-2.0.3/src/prelims.web
*** 3DLDF-2.0.2/src/prelims.web	Thu Nov  7 13:36:42 2013
--- 3DLDF-2.0.3/src/prelims.web	Fri Dec 13 14:27:04 2013
***************
*** 73,77 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 73,77 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
diff -rc2P 3DLDF-2.0.2/src/primes.web 3DLDF-2.0.3/src/primes.web
*** 3DLDF-2.0.2/src/primes.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/primes.web	Fri Dec 13 14:50:03 2013
***************
*** 175,179 ****
  
  
!    if (primes_table != 0)
        {
            B:
--- 175,179 ----
  
  
!    if (primes_table != static_cast<vector<ulong_long>*>(0))
        {
            B:
***************
*** 537,541 ****
  @q **** (4)@> 
  
!     if (primes_table == 0 || primes_table->size() < v)
         {
             get_prime(v, scanner_node);
--- 537,541 ----
  @q **** (4)@> 
  
!     if (primes_table == static_cast<vector<ulong_long>*>(0) || primes_table->size() < v)
         {
             get_prime(v, scanner_node);
***************
*** 633,637 ****
                    r = n % (*primes_table)[k];
  
!                   if (r == 0)
                       {
                           break;
--- 633,637 ----
                    r = n % (*primes_table)[k];
  
!                   if (r == 0ULL)
                       {
                           break;
***************
*** 686,690 ****
  @q **** (4)@> 
  
!     if (primes_table == 0)
         {
              cerr_mutex.lock(); 
--- 686,690 ----
  @q **** (4)@> 
  
!     if (primes_table == static_cast<vector<ulong_long>*>(0))
         {
              cerr_mutex.lock(); 
diff -rc2P 3DLDF-2.0.2/src/prplexpr.w 3DLDF-2.0.3/src/prplexpr.w
*** 3DLDF-2.0.2/src/prplexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/prplexpr.w	Fri Dec 13 14:28:46 2013
***************
*** 94,98 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 94,98 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 180,189 ****
  
  
!   if (t == 0)
     {
  
        delete s;
  
!       @=$$@> = 0;
  
     } /* |if (t == 0)|  */
--- 180,189 ----
  
  
!   if (t == static_cast<const Reg_Polygon*>(0))
     {
  
        delete s;
  
!       @=$$@> = static_cast<void*>(0);
  
     } /* |if (t == 0)|  */
***************
*** 240,249 ****
       const Reg_Polygon* t = p->get_reg_polygon_ptr(u); 
  
!      if (t == 0)
        {
  
           delete p;
  
!          @=$$@> = 0;
  
        } /* |if (t == 0)|  */
--- 240,249 ----
       const Reg_Polygon* t = p->get_reg_polygon_ptr(u); 
  
!      if (t == static_cast<const Reg_Polygon*>(0))
        {
  
           delete p;
  
!          @=$$@> = static_cast<void*>(0);
  
        } /* |if (t == 0)|  */
***************
*** 299,308 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 299,308 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Reg_Polygon>*>(0))
        {
  
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 319,323 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 319,323 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/prpvexpr.w 3DLDF-2.0.3/src/prpvexpr.w
*** 3DLDF-2.0.2/src/prpvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/prpvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 360,364 ****
       {
         
!        @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 360,364 ----
       {
         
!        @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/prrfnc0.web 3DLDF-2.0.3/src/prrfnc0.web
*** 3DLDF-2.0.2/src/prrfnc0.web	Wed Nov  6 20:56:24 2013
--- 3DLDF-2.0.3/src/prrfnc0.web	Fri Dec 13 14:31:51 2013
***************
*** 3215,3219 ****
  @q **** (4)@> 
  
!    if (bp == 0)
        {
  
--- 3215,3219 ----
  @q **** (4)@> 
  
!    if (bp == static_cast<void*>(0))
        {
  
***************
*** 3257,3261 ****
  @q **** (4)@> 
  
!    if (s == 0)
        {
             stringstream label_strm;
--- 3257,3261 ----
  @q **** (4)@> 
  
!    if (s == static_cast<string*>(0))
        {
             stringstream label_strm;
***************
*** 3503,3506 ****
--- 3503,3510 ----
  \initials{LDF 2006.02.23.}
  Now setting |*result| to 0, if the value returned by |sin() < .00001|. 
+ 
+ \initials{LDF 2013.12.11.}
+ Added conditionally compiled code for the cases that |real| is a |typedef| for |float|
+ or |double|.  This eliminates a warning from GCC.
  \ENDLOG 
  
***************
*** 3510,3516 ****
        {
  
!           operand = fmod(operand, 360.0);
  
!           real r = sin((PI/180.0) * operand);
            *result = (fabs(r) < .00001) ? 0 : r;
            return 0;
--- 3514,3530 ----
        {
  
!           real r;
  
! #if LDF_REAL_FLOAT
!           operand = fmodf(operand, 360.0F);
!           r = sin((PI/180.0F) * operand);
! #elif LDF_REAL_DOUBLE
!           operand = fmod(operand, 360.0D);
!           r = sin((PI/180.0D) * operand);
! #else /* Default.  */
!           operand = fmodf(operand, 360.0F);
!           r = sin((PI/180.0F) * operand);
! #endif
!           
            *result = (fabs(r) < .00001) ? 0 : r;
            return 0;
***************
*** 3524,3527 ****
--- 3538,3545 ----
  \initials{LDF 2006.02.23.}
  Now setting |*result| to 0, if the value returned by |cos() < .00001|. 
+ 
+ \initials{LDF 2013.12.11.}
+ Added conditionally compiled code for the cases that |real| is a |typedef| for |float|
+ or |double|.  This eliminates a warning from GCC.
  \ENDLOG 
  
***************
*** 3530,3535 ****
    else if (operator_value == COSD)
       {
!           operand = fmod(operand, 360.0);
!           real r = cos((PI/180.0) * operand);
            *result = (fabs(r) < .00001) ? 0 : r;
            return 0;
--- 3548,3566 ----
    else if (operator_value == COSD)
       {
! 
!           real r;
! 
! #if LDF_REAL_FLOAT
!           operand = fmodf(operand, 360.0F);
!           r = cos((PI/180.0F) * operand);
! #elif LDF_REAL_DOUBLE
!           operand = fmod(operand, 360.0D);
!           r = cos((PI/180.0D) * operand);
! #else /* Default.  */
!           operand = fmodf(operand, 360.0F);
!           r = cos((PI/180.0F) * operand);
! 
! #endif
! 
            *result = (fabs(r) < .00001) ? 0 : r;
            return 0;
***************
*** 3542,3545 ****
--- 3573,3580 ----
  \initials{LDF 2007.02.06.}
  Added this section.
+ 
+ \initials{LDF 2013.12.11.}
+ Added conditionally compiled code for the cases that |real| is a |typedef| for |float|
+ or |double|.  This eliminates a warning from GCC.
  \ENDLOG 
  
***************
*** 3549,3553 ****
       {
  
!           operand = fmod(operand, 360.0);
  
  @q ****** (6)@> 
--- 3584,3594 ----
       {
  
! #if LDF_REAL_FLOAT
!           operand = fmodf(operand, 360.0F); 
! #elif LDF_REAL_DOUBLE
!           operand = fmod(operand, 360.0D);  
! #else /* Default.  */
!           operand = fmodf(operand, 360.0F); 
! #endif
  
  @q ****** (6)@> 
***************
*** 3969,3973 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 4010,4014 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 4118,4122 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 4159,4163 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 4527,4531 ****
  @q **** (4).@>
  
!    if (ffocus == 0)
        return 0;
  
--- 4568,4572 ----
  @q **** (4).@>
  
!    if (ffocus == static_cast<Focus*>(0))
        return 0;
  
***************
*** 4613,4617 ****
  @q **** (4)@>
  
!    if (transform == 0)
     {
  
--- 4654,4658 ----
  @q **** (4)@>
  
!    if (transform == static_cast<Transform*>(0))
     {
  
***************
*** 4836,4840 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 4877,4881 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 5140,5144 ****
         = static_cast<Id_Map_Entry_Node>(to_picture_entry); 
     
!    if (p_entry == 0)
        {
           cerr_strm << "ERROR!  "
--- 5181,5185 ----
         = static_cast<Id_Map_Entry_Node>(to_picture_entry); 
     
!    if (p_entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << "ERROR!  "
***************
*** 5162,5166 ****
     Picture* p;
  
!    if (p_entry->object == 0)
        {
           p = new Picture;
--- 5203,5207 ----
     Picture* p;
  
!    if (p_entry->object == static_cast<void*>(0))
        {
           p = new Picture;
***************
*** 5181,5185 ****
     
  
!    if (q_entry == 0)
        {
           cerr_strm << "ERROR!  "
--- 5222,5226 ----
     
  
!    if (q_entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << "ERROR!  "
***************
*** 5202,5206 ****
     Picture* q;
  
!    if (q_entry->object == 0)
        {
           q = new Picture;
--- 5243,5247 ----
     Picture* q;
  
!    if (q_entry->object == static_cast<void*>(0))
        {
           q = new Picture;
***************
*** 5266,5270 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 5307,5311 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 5321,5325 ****
  @q ***** (5)@>
  
!    if (curr_var == 0 || parameter == 0)
         return 1;
      
--- 5362,5366 ----
  @q ***** (5)@>
  
!    if (curr_var == static_cast<void*>(0) || parameter == static_cast<void*>(0))
         return 1;
      
***************
*** 5328,5332 ****
      Matrix* curr_matrix = static_cast<Matrix*>(entry->object);
  
!     if (curr_matrix == 0)
      {
          curr_matrix = create_new<Matrix>(0); 
--- 5369,5373 ----
      Matrix* curr_matrix = static_cast<Matrix*>(entry->object);
  
!     if (curr_matrix == static_cast<Matrix*>(0))
      {
          curr_matrix = create_new<Matrix>(0); 
***************
*** 5399,5403 ****
  
   
!    if (curr_var == 0 || parameter == 0)
         return 1;
  
--- 5440,5444 ----
  
   
!    if (curr_var == static_cast<void*>(0) || parameter == static_cast<void*>(0))
         return 1;
  
***************
*** 5411,5415 ****
      Parabola* curr_parabola = static_cast<Parabola*>(entry->object);
  
!     if (curr_parabola == 0)
         {
             curr_parabola = create_new<Parabola>(0); 
--- 5452,5456 ----
      Parabola* curr_parabola = static_cast<Parabola*>(entry->object);
  
!     if (curr_parabola == static_cast<Parabola*>(0))
         {
             curr_parabola = create_new<Parabola>(0); 
***************
*** 5449,5453 ****
  
   
!    if (curr_var == 0 || parameter == 0)
         return 1;
  
--- 5490,5494 ----
  
   
!    if (curr_var == static_cast<void*>(0) || parameter == static_cast<void*>(0))
         return 1;
  
***************
*** 5460,5464 ****
      Hyperbola* curr_hyperbola = static_cast<Hyperbola*>(entry->object);
  
!     if (curr_hyperbola == 0)
         {
             curr_hyperbola = create_new<Hyperbola>(0); 
--- 5501,5505 ----
      Hyperbola* curr_hyperbola = static_cast<Hyperbola*>(entry->object);
  
!     if (curr_hyperbola == static_cast<Hyperbola*>(0))
         {
             curr_hyperbola = create_new<Hyperbola>(0); 
***************
*** 5498,5502 ****
  
   
!    if (curr_var == 0 || parameter == 0)
         return 1;
      
--- 5539,5543 ----
  
   
!    if (curr_var == static_cast<void*>(0) || parameter == static_cast<void*>(0))
         return 1;
      
***************
*** 5511,5515 ****
      Arc* curr_arc = static_cast<Arc*>(entry->object);
  
!     if (curr_arc == 0)
      {
          curr_arc = create_new<Arc>(0); 
--- 5552,5556 ----
      Arc* curr_arc = static_cast<Arc*>(entry->object);
  
!     if (curr_arc == static_cast<Arc*>(0))
      {
          curr_arc = create_new<Arc>(0); 
***************
*** 5587,5591 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 5628,5632 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 5613,5617 ****
     Helix* curr_helix;
  
!    if (entry->object == 0)
        {
            curr_helix = create_new<Helix>(0);
--- 5654,5658 ----
     Helix* curr_helix;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_helix = create_new<Helix>(0);
***************
*** 5683,5687 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 5724,5728 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 5709,5713 ****
     Cone* curr_cone;
  
!    if (entry->object == 0)
        {
            curr_cone = create_new<Cone>(0);
--- 5750,5754 ----
     Cone* curr_cone;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_cone = create_new<Cone>(0);
***************
*** 5776,5780 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 5817,5821 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 5802,5806 ****
     Cylinder* curr_cylinder;
  
!    if (entry->object == 0)
        {
            curr_cylinder = create_new<Cylinder>(0);
--- 5843,5847 ----
     Cylinder* curr_cylinder;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_cylinder = create_new<Cylinder>(0);
***************
*** 5875,5879 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 5916,5920 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 5901,5905 ****
     Ellipsoid* curr_ellipsoid;
  
!    if (entry->object == 0)
        {
            curr_ellipsoid = create_new<Ellipsoid>(0);
--- 5942,5946 ----
     Ellipsoid* curr_ellipsoid;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_ellipsoid = create_new<Ellipsoid>(0);
***************
*** 5971,5975 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 6012,6016 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 5997,6001 ****
     Sphere* curr_sphere;
  
!    if (entry->object == 0)
        {
            curr_sphere = create_new<Sphere>(0);
--- 6038,6042 ----
     Sphere* curr_sphere;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_sphere = create_new<Sphere>(0);
***************
*** 6053,6057 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6094,6098 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6079,6083 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 6120,6124 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 6105,6109 ****
     Sphere_Development* curr_sphere_development;
  
!    if (entry->object == 0)
        {
            curr_sphere_development = create_new<Sphere_Development>(0);
--- 6146,6150 ----
     Sphere_Development* curr_sphere_development;
  
!    if (entry->object == static_cast<void*>(0))
        {
            curr_sphere_development = create_new<Sphere_Development>(0);
***************
*** 6182,6186 ****
  @q ***** (5)@>  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name 
--- 6223,6227 ----
  @q ***** (5)@>  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name 
***************
*** 6237,6241 ****
  @q ***** (5)@> 
  
!    if (entry->object == 0 && options->type == Paraboloid::ELLIPTICAL_TYPE)
        {
            Elliptical_Paraboloid* curr_paraboloid
--- 6278,6282 ----
  @q ***** (5)@> 
  
!    if (entry->object == static_cast<void*>(0) && options->type == Paraboloid::ELLIPTICAL_TYPE)
        {
            Elliptical_Paraboloid* curr_paraboloid
***************
*** 6253,6257 ****
  
  
!    else if (entry->object == 0 && options->type == Paraboloid::HYPERBOLIC_TYPE)
        {
            Hyperbolic_Paraboloid* curr_paraboloid
--- 6294,6299 ----
  
  
!    else if (   entry->object == static_cast<void*>(0) 
!             && options->type == Paraboloid::HYPERBOLIC_TYPE)
        {
            Hyperbolic_Paraboloid* curr_paraboloid
***************
*** 6266,6270 ****
  @q ***** (5)@> 
  
!    else if (entry->object != 0)
        {
            Paraboloid* curr_paraboloid = static_cast<Paraboloid*>(entry->object);
--- 6308,6312 ----
  @q ***** (5)@> 
  
!    else if (entry->object != static_cast<void*>(0))
        {
            Paraboloid* curr_paraboloid = static_cast<Paraboloid*>(entry->object);
diff -rc2P 3DLDF-2.0.2/src/psetcmnd.w 3DLDF-2.0.3/src/psetcmnd.w
*** 3DLDF-2.0.2/src/psetcmnd.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/psetcmnd.w	Fri Dec 13 14:52:37 2013
***************
*** 166,170 ****
  @<Define rules@>=
  
!    if (entry == 0)
        {
     
--- 166,170 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
     
***************
*** 196,200 ****
  @<Define rules@>=
     
!          if (entry->object == 0)
              {
  
--- 196,200 ----
  @<Define rules@>=
     
!          if (entry->object == static_cast<void*>(0))
              {
  
***************
*** 248,252 ****
  @q ***** (5) @> 
     
!    @=$$@> = 0;
  
  };
--- 248,252 ----
  @q ***** (5) @> 
     
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 554,561 ****
  @<Define rules@>=
  
!    if (entry == 0)
       {
          
!         @=$$@> = 0;
  
       }  /* |if (entry == 0)|  */
--- 554,561 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
       {
          
!         @=$$@> = static_cast<void*>(0);
  
       }  /* |if (entry == 0)|  */
***************
*** 578,585 ****
  @<Define rules@>=
  
!           if (e == 0)
               {
  
- 
                      e = create_new<Ellipse>(0);
  
--- 578,584 ----
  @<Define rules@>=
  
!           if (e == static_cast<Ellipse*>(0))
               {
  
                      e = create_new<Ellipse>(0);
  
***************
*** 706,712 ****
  @<Define rules@>=
  
!    if (entry == 0)
       {
!         @=$$@> = 0;
  
       }  /* |if (entry == 0)|  */
--- 705,711 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
       {
!         @=$$@> = static_cast<void*>(0);
  
       }  /* |if (entry == 0)|  */
***************
*** 729,733 ****
  @<Define rules@>=
  
!           if (c == 0)
               {
  
--- 728,732 ----
  @<Define rules@>=
  
!           if (c == static_cast<Circle*>(0))
               {
  
***************
*** 844,848 ****
     static_cast<Scanner_Node>(parameter)->parabola_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 843,847 ----
     static_cast<Scanner_Node>(parameter)->parabola_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 877,881 ****
  
  
!    if (scanner_node->parabola_set_option_struct != 0)
        scanner_node->parabola_set_option_struct->clear();
  
--- 876,881 ----
  
  
!    if (   scanner_node->parabola_set_option_struct 
!        != static_cast<Parabola_Set_Option_Struct*>(0))
        scanner_node->parabola_set_option_struct->clear();
  
***************
*** 883,887 ****
        scanner_node->parabola_set_option_struct = new Parabola_Set_Option_Struct;
  
!    @=$$@> = 0;
  
  };
--- 883,887 ----
        scanner_node->parabola_set_option_struct = new Parabola_Set_Option_Struct;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 903,907 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 903,907 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 937,941 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 937,941 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 958,962 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 958,962 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 979,983 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 979,983 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1001,1005 ****
        = @=$2@> / 2; 
  
!    @=$$@> = 0;
  
  };
--- 1001,1005 ----
        = @=$2@> / 2; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1024,1028 ****
        = static_cast<Path*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1024,1028 ----
        = static_cast<Path*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1045,1049 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1045,1049 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1066,1070 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1066,1070 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1102,1106 ****
     static_cast<Scanner_Node>(parameter)->hyperbola_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 1102,1106 ----
     static_cast<Scanner_Node>(parameter)->hyperbola_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1135,1139 ****
  
  
!    if (scanner_node->hyperbola_set_option_struct != 0)
        scanner_node->hyperbola_set_option_struct->clear();
  
--- 1135,1139 ----
  
  
!    if (scanner_node->hyperbola_set_option_struct != static_cast<Hyperbola_Set_Option_Struct*>(0))
        scanner_node->hyperbola_set_option_struct->clear();
  
***************
*** 1141,1145 ****
        scanner_node->hyperbola_set_option_struct = new Hyperbola_Set_Option_Struct;
  
!    @=$$@> = 0;
  
  };
--- 1141,1145 ----
        scanner_node->hyperbola_set_option_struct = new Hyperbola_Set_Option_Struct;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1161,1165 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 1161,1165 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1195,1199 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1195,1199 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1219,1223 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1219,1223 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1240,1244 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1240,1244 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1261,1265 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1261,1265 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1282,1286 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1282,1286 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1303,1307 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1303,1307 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1324,1328 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1324,1328 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1345,1349 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1345,1349 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1367,1371 ****
        = @=$2@> / 2; 
  
!    @=$$@> = 0;
  
  };
--- 1367,1371 ----
        = @=$2@> / 2; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1389,1393 ****
        = static_cast<Path*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1389,1393 ----
        = static_cast<Path*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1410,1414 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1410,1414 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1431,1435 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1431,1435 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1454,1458 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1454,1458 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1477,1481 ****
        = @=$2@> / 2; 
  
!    @=$$@> = 0;
  
  };
--- 1477,1481 ----
        = @=$2@> / 2; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1500,1504 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1500,1504 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1523,1527 ****
        = @=$2@> / 2; 
  
!    @=$$@> = 0;
  
  };
--- 1523,1527 ----
        = @=$2@> / 2; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1575,1579 ****
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 1575,1579 ----
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1608,1612 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter); 
  
!    if (scanner_node->helix_set_option_struct != 0)
        scanner_node->helix_set_option_struct->clear();
  
--- 1608,1612 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter); 
  
!    if (scanner_node->helix_set_option_struct != static_cast<Helix_Set_Option_Struct*>(0))
        scanner_node->helix_set_option_struct->clear();
  
***************
*** 1614,1618 ****
        scanner_node->helix_set_option_struct = new Helix_Set_Option_Struct;
  
!    @=$$@> = 0;
  
  };
--- 1614,1618 ----
        scanner_node->helix_set_option_struct = new Helix_Set_Option_Struct;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1634,1638 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 1634,1638 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1668,1672 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1668,1672 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1689,1693 ****
         = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1689,1693 ----
         = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1710,1714 ****
        = static_cast<Pointer_Vector<Point>*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 1710,1714 ----
        = static_cast<Pointer_Vector<Point>*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1731,1735 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 1731,1735 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1756,1760 ****
  
  
!    @=$$@> = 0;
  
  };
--- 1756,1760 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1776,1780 ****
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct->cycles = fabs(@=$2@>);
  
!    @=$$@> = 0;
  
  };
--- 1776,1780 ----
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct->cycles = fabs(@=$2@>);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1797,1801 ****
        = fmod(fabs(@=$2@>), 360);
  
!    @=$$@> = 0;
  
  };
--- 1797,1801 ----
        = fmod(fabs(@=$2@>), 360);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1818,1822 ****
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct->type = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 1818,1822 ----
     static_cast<Scanner_Node>(parameter)->helix_set_option_struct->type = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1972,1979 ****
  @<Define rules@>=
  
!    if (entry == 0)
       {
          
!         @=$$@> = 0;
  
       }  /* |if (entry == 0)|  */
--- 1972,1979 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
       {
          
!         @=$$@> = static_cast<void*>(0);
  
       }  /* |if (entry == 0)|  */
***************
*** 1996,2000 ****
  @<Define rules@>=
  
!           if (t == 0)
               {
  
--- 1996,2000 ----
  @<Define rules@>=
  
!           if (t == static_cast<Triangle*>(0))
               {
  
***************
*** 2067,2073 ****
  @<Define rules@>=
  
!    if (entry == 0)
       {
!         @=$$@> = 0;
  
       }  /* |if (entry == 0)|  */
--- 2067,2073 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
       {
!         @=$$@> = static_cast<void*>(0);
  
       }  /* |if (entry == 0)|  */
***************
*** 2090,2094 ****
  @<Define rules@>=
  
!           if (r == 0)
               {
  
--- 2090,2094 ----
  @<Define rules@>=
  
!           if (r == static_cast<Reg_Polygon*>(0))
               {
  
***************
*** 2476,2480 ****
  @<Define rules@>=
  
!    if (r == 0)
        {
  
--- 2476,2480 ----
  @<Define rules@>=
  
!    if (r == ZERO_REAL)
        {
  
***************
*** 2633,2637 ****
     static_cast<Scanner_Node>(parameter)->cone_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 2633,2637 ----
     static_cast<Scanner_Node>(parameter)->cone_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2666,2670 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->cone_set_option_struct != 0)
        scanner_node->cone_set_option_struct->clear();
  
--- 2666,2670 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->cone_set_option_struct != static_cast<Cone_Set_Option_Struct*>(0))
        scanner_node->cone_set_option_struct->clear();
  
***************
*** 2672,2676 ****
        scanner_node->cone_set_option_struct = new Cone_Set_Option_Struct;
  
!    @=$$@> = 0;
  
  };
--- 2672,2676 ----
        scanner_node->cone_set_option_struct = new Cone_Set_Option_Struct;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2692,2696 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 2692,2696 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2726,2730 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 2726,2730 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2747,2757 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
  
! @q ** (2) set_cone_option_list --> WITH_RADIUS numeric_expression.@>   
! @* \§set cone option list> $\longrightarrow$ \.{WITH\_RADIUS}
! \§numeric expresssion>.
  \initials{LDF 2006.11.08.}
  
--- 2747,2756 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
  
! @q ** (2) set_cone_option --> WITH_RADIUS numeric_expression.@>   
! @* \§set cone option> $\longrightarrow$ \.{WITH\_RADIUS} \§numeric expresssion>.
  \initials{LDF 2006.11.08.}
  
***************
*** 2767,2771 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->radius == 0)
         scanner_node->cone_set_option_struct->radius = new real(@=$2@>); 
      else 
--- 2766,2770 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->radius == static_cast<real*>(0))
         scanner_node->cone_set_option_struct->radius = new real(@=$2@>); 
      else 
***************
*** 2773,2777 ****
  
  
!    @=$$@> = 0;
  
  };
--- 2772,2776 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2793,2802 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_x == 0)
         scanner_node->cone_set_option_struct->axis_x = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_x = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 2792,2801 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_x == static_cast<real*>(0))
         scanner_node->cone_set_option_struct->axis_x = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_x = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2818,2827 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_y == 0)
         scanner_node->cone_set_option_struct->axis_y = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_y = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 2817,2826 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_y == static_cast<real*>(0))
         scanner_node->cone_set_option_struct->axis_y = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_y = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2843,2852 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_z == 0)
         scanner_node->cone_set_option_struct->axis_z = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_z = @=$2@>; 
      
!    @=$$@> = 0;
  
  };
--- 2842,2851 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cone_set_option_struct->axis_z == static_cast<real*>(0))
         scanner_node->cone_set_option_struct->axis_z = new real(@=$2@>); 
      else 
         *scanner_node->cone_set_option_struct->axis_z = @=$2@>; 
      
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2869,2873 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 2868,2872 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2890,2894 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 2889,2893 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2912,2916 ****
        = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 2911,2915 ----
        = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3018,3022 ****
        = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 3017,3021 ----
        = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3106,3110 ****
     static_cast<Scanner_Node>(parameter)->cylinder_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 3105,3109 ----
     static_cast<Scanner_Node>(parameter)->cylinder_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3139,3143 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->cylinder_set_option_struct != 0)
        scanner_node->cylinder_set_option_struct->clear();
  
--- 3138,3142 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->cylinder_set_option_struct != static_cast<Cylinder_Set_Option_Struct*>(0))
        scanner_node->cylinder_set_option_struct->clear();
  
***************
*** 3146,3150 ****
  
  
!    @=$$@> = 0;
  
  };
--- 3145,3149 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3166,3170 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 3165,3169 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3200,3204 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 3199,3203 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3222,3226 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  
--- 3221,3225 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  
***************
*** 3243,3247 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->radius == 0)
         scanner_node->cylinder_set_option_struct->radius = new real(@=$2@>); 
      else 
--- 3242,3246 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->radius == static_cast<real*>(0))
         scanner_node->cylinder_set_option_struct->radius = new real(@=$2@>); 
      else 
***************
*** 3249,3253 ****
  
  
!    @=$$@> = 0;
  
  };
--- 3248,3252 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3270,3279 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_x == 0)
         scanner_node->cylinder_set_option_struct->axis_x = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_x = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 3269,3278 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_x == static_cast<real*>(0))
         scanner_node->cylinder_set_option_struct->axis_x = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_x = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3295,3304 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_y == 0)
         scanner_node->cylinder_set_option_struct->axis_y = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_y = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 3294,3303 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_y == static_cast<real*>(0))
         scanner_node->cylinder_set_option_struct->axis_y = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_y = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3320,3329 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_z == 0)
         scanner_node->cylinder_set_option_struct->axis_z = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_z = @=$2@>; 
      
!    @=$$@> = 0;
  
  };
--- 3319,3328 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
   
!     if (scanner_node->cylinder_set_option_struct->axis_z == static_cast<real*>(0))
         scanner_node->cylinder_set_option_struct->axis_z = new real(@=$2@>); 
      else 
         *scanner_node->cylinder_set_option_struct->axis_z = @=$2@>; 
      
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3346,3350 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3345,3349 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3367,3371 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3366,3370 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3389,3393 ****
        = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 3388,3392 ----
        = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3512,3516 ****
     static_cast<Scanner_Node>(parameter)->ellipsoid_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 3511,3515 ----
     static_cast<Scanner_Node>(parameter)->ellipsoid_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3548,3552 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->ellipsoid_set_option_struct != 0)
        scanner_node->ellipsoid_set_option_struct->clear();
  
--- 3547,3551 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->ellipsoid_set_option_struct != static_cast<Ellipsoid_Set_Option_Struct*>(0))
        scanner_node->ellipsoid_set_option_struct->clear();
  
***************
*** 3554,3558 ****
        scanner_node->ellipsoid_set_option_struct = new Ellipsoid_Set_Option_Struct;
  
!    @=$$@> = 0;
  
  };
--- 3553,3557 ----
        scanner_node->ellipsoid_set_option_struct = new Ellipsoid_Set_Option_Struct;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3573,3577 ****
  @=set_ellipsoid_option_list: set_ellipsoid_option_list set_ellipsoid_option@>@/        
  {
!    @=$$@> = 0;
  
  };
--- 3572,3576 ----
  @=set_ellipsoid_option_list: set_ellipsoid_option_list set_ellipsoid_option@>@/        
  {
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3607,3611 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 3606,3610 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3637,3641 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 3636,3640 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3659,3663 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 3658,3662 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3680,3684 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 3679,3683 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3711,3715 ****
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3710,3714 ----
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3732,3736 ****
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3731,3735 ----
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3753,3757 ****
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3752,3756 ----
        = static_cast<unsigned short>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3774,3778 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3773,3777 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3810,3814 ****
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 3809,3813 ----
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3846,3850 ****
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (scanner_node->sphere_set_option_struct != 0)
         scanner_node->sphere_set_option_struct->clear();
  
--- 3845,3849 ----
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (scanner_node->sphere_set_option_struct != static_cast<Sphere_Set_Option_Struct*>(0))
         scanner_node->sphere_set_option_struct->clear();
  
***************
*** 3852,3856 ****
         scanner_node->sphere_set_option_struct = new Sphere_Set_Option_Struct;
  
!     @=$$@> = 0;
  
  };
--- 3851,3855 ----
         scanner_node->sphere_set_option_struct = new Sphere_Set_Option_Struct;
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3872,3876 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 3871,3875 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3910,3914 ****
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = 0;
  
  };
--- 3909,3913 ----
        = static_cast<Point*>(@=$2@>); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3945,3949 ****
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = 0;
  
  };
--- 3944,3948 ----
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3970,3974 ****
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 3969,3973 ----
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3995,3999 ****
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = 0;
  
  };
--- 3994,3998 ----
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4015,4019 ****
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct->radius = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 4014,4018 ----
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct->radius = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4040,4044 ****
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct->radius = .5 * @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 4039,4043 ----
     static_cast<Scanner_Node>(parameter)->sphere_set_option_struct->radius = .5 * @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4063,4067 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 4062,4066 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4083,4087 ****
        = @=$2@>;
  
!    @=$$@> = 0;
  
  };
--- 4082,4086 ----
        = @=$2@>;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4167,4171 ****
     static_cast<Scanner_Node>(parameter)->sphere_development_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 4166,4170 ----
     static_cast<Scanner_Node>(parameter)->sphere_development_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4199,4203 ****
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (scanner_node->sphere_development_set_option_struct != 0)
         scanner_node->sphere_development_set_option_struct->clear();
  
--- 4198,4203 ----
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (   scanner_node->sphere_development_set_option_struct 
!         != static_cast<Sphere_Development_Set_Option_Struct*>(0))
         scanner_node->sphere_development_set_option_struct->clear();
  
***************
*** 4206,4210 ****
            = new Sphere_Development_Set_Option_Struct;
  
!     @=$$@> = 0;
  
  };
--- 4206,4210 ----
            = new Sphere_Development_Set_Option_Struct;
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4227,4231 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 4227,4231 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4263,4267 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 4263,4267 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4284,4288 ****
        = .5 * @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 4284,4288 ----
        = .5 * @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4306,4314 ****
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = 0;
  
  };
  
! @q *** (3) set_sphere_development_option_list --> WITH_DIVISIONS_LONGITUDE numeric_expression.@>   
  @*2 \§set sphere_development option list> $\longrightarrow$ \.{WITH\_DIVISIONS\_LONGITUDE}
  \§numeric expresssion>.
--- 4306,4314 ----
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
  
! @q *** (3) set_sphere_development_option_list --> WITH_DIVISIONS_LONGITUDE numeric_expression.@>
  @*2 \§set sphere_development option list> $\longrightarrow$ \.{WITH\_DIVISIONS\_LONGITUDE}
  \§numeric expresssion>.
***************
*** 4328,4332 ****
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = 0;
  
  };
--- 4328,4332 ----
         = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4350,4354 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 4350,4354 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4371,4375 ****
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = 0;
  
  };
--- 4371,4375 ----
        = static_cast<unsigned int>(floor(fabs(@=$2@>) + .5)); 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4392,4396 ****
     Transform* t = static_cast<Transform*>(@=$2@>);
  
!    if (t != 0)
     {
         static_cast<Scanner_Node>(
--- 4392,4396 ----
     Transform* t = static_cast<Transform*>(@=$2@>);
  
!    if (t != static_cast<Transform*>(0))
     {
         static_cast<Scanner_Node>(
***************
*** 4402,4406 ****
     }
  
!    @=$$@> = 0;
  
  };
--- 4402,4406 ----
     }
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4439,4443 ****
     static_cast<Scanner_Node>(parameter)->paraboloid_set_option_struct = 0;
  
!    @=$$@> = 0;
  
  };
--- 4439,4443 ----
     static_cast<Scanner_Node>(parameter)->paraboloid_set_option_struct = 0;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4471,4475 ****
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (scanner_node->paraboloid_set_option_struct != 0)
         scanner_node->paraboloid_set_option_struct->clear();
  
--- 4471,4476 ----
      Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!     if (   scanner_node->paraboloid_set_option_struct 
!         != static_cast<Paraboloid_Set_Option_Struct*>(0))
         scanner_node->paraboloid_set_option_struct->clear();
  
***************
*** 4477,4481 ****
         scanner_node->paraboloid_set_option_struct = new Paraboloid_Set_Option_Struct;
  
!     @=$$@> = 0;
  
  };
--- 4478,4482 ----
         scanner_node->paraboloid_set_option_struct = new Paraboloid_Set_Option_Struct;
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 4497,4501 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 4498,4502 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pshowcmd.w 3DLDF-2.0.3/src/pshowcmd.w
*** 3DLDF-2.0.2/src/pshowcmd.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pshowcmd.w	Fri Dec 13 11:59:34 2013
***************
*** 110,114 ****
     cerr_strm.str("");
  
!    @=$$@> = 0;
  
  };
--- 110,114 ----
     cerr_strm.str("");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 166,170 ****
     cerr_strm.str("");
  
!    @=$$@> = 0;
  
  };
--- 166,170 ----
     cerr_strm.str("");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 193,197 ****
                      parameter);
  
!    @=$$@> = 0;
  
  };
--- 193,197 ----
                      parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 221,225 ****
                      parameter);
  
!    @=$$@> = 0;
  
  };
--- 221,225 ----
                      parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 252,256 ****
  @=fixed_optional: /* Empty */@>@/
  {
!    @=$$@> = 0;
  };
  
--- 252,256 ----
  @=fixed_optional: /* Empty */@>@/
  {
!    @=$$@> = 0;  /* integer  */
  };
  
***************
*** 302,306 ****
     cerr_strm.str("");
  
!    @=$$@> = 0;
  
  };
--- 302,306 ----
     cerr_strm.str("");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 365,369 ****
     cerr_strm.str("");
  
!    @=$$@> = 0;
  
  };
--- 365,369 ----
     cerr_strm.str("");
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 398,402 ****
                                   parameter); 
  
!     @=$$@> = 0;
  };
  
--- 398,402 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 429,433 ****
                                   parameter); 
  
!     @=$$@> = 0;
     
  
--- 429,433 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
     
  
***************
*** 462,466 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  
--- 462,466 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  
***************
*** 494,498 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  };
--- 494,498 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 543,547 ****
  
  
!     @=$$@> = 0;
  
  };
--- 543,547 ----
  
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 571,575 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  };
--- 571,575 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 600,604 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  };
--- 600,604 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 630,634 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  };
--- 630,634 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 663,667 ****
                                   parameter); 
  
!     @=$$@> = 0;
  
  };
--- 663,667 ----
                                   parameter); 
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 693,697 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 693,697 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 724,728 ****
                                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 724,728 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 769,773 ****
     cerr_strm  << ">> ";
  
!    if (entry == 0 || entry->object == 0)
       {
          cerr_strm << "(unknown macro)";
--- 769,773 ----
     cerr_strm  << ">> ";
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
       {
          cerr_strm << "(unknown macro)";
***************
*** 793,797 ****
        } /* |else| (|entry != 0 && entry->object != 0|)  */
   
!    @=$$@> = 0;
  
  };
--- 793,797 ----
        } /* |else| (|entry != 0 && entry->object != 0|)  */
   
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 826,830 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 826,830 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 857,861 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 857,861 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 881,885 ****
                                      parameter);
  
!     @=$$@> = 0;
  };
  
--- 881,885 ----
                                      parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 905,909 ****
                                       parameter);
  
!     @=$$@> = 0;
  };
  
--- 905,909 ----
                                       parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 944,948 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 944,948 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 969,973 ****
                      parameter);
  
!     @=$$@> = 0;
  };
  
--- 969,973 ----
                      parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 993,997 ****
                                       parameter);
  
!     @=$$@> = 0;
  };
  
--- 993,997 ----
                                       parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1020,1024 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1020,1024 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1051,1055 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1051,1055 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1078,1082 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1078,1082 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1105,1109 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1105,1109 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1133,1137 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1133,1137 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1164,1168 ****
                                        parameter);
  
!     @=$$@> = 0;};
  
  @q **** (4) command --> SHOW cone_expression@>
--- 1164,1168 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);};
  
  @q **** (4) command --> SHOW cone_expression@>
***************
*** 1190,1194 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1190,1194 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1218,1222 ****
                                        parameter);
  
!     @=$$@> = 0;
  
  };
--- 1218,1222 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1250,1254 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1250,1254 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1280,1284 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1280,1284 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1307,1311 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1307,1311 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1334,1338 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1334,1338 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1358,1362 ****
                               parameter);
  
!     @=$$@> = 0;
  };
  
--- 1358,1362 ----
                               parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1383,1387 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1383,1387 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1413,1417 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1413,1417 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1440,1444 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1440,1444 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1467,1471 ****
                                        parameter);
  
!     @=$$@> = 0;
  };
  
--- 1467,1471 ----
                                        parameter);
  
!     @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 1570,1574 ****
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = 0;
  
  };
--- 1570,1574 ----
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1649,1653 ****
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = 0;
  
  };
--- 1649,1653 ----
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1711,1715 ****
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = 0;
  
  };
--- 1711,1715 ----
       }  /* |else| (|!nv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1739,1743 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 1739,1743 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1767,1771 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 1767,1771 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1857,1861 ****
       }  /* |else| (|!sv || sv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 1857,1861 ----
       }  /* |else| (|!sv || sv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1925,1929 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 1925,1929 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1994,1998 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 1994,1998 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2067,2071 ****
       }  /* |else| (|!cv|)  */
  
!    @=$$@> = 0;
  
  };
--- 2067,2071 ----
       }  /* |else| (|!cv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2136,2140 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 2136,2140 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2204,2208 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 2204,2208 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2247,2251 ****
     cerr_strm  << ">> ";
  
!    if (entry == 0 || entry->object == 0)
        {
            cerr_strm << "(unknown picture_vector)";
--- 2247,2251 ----
     cerr_strm  << ">> ";
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << "(unknown picture_vector)";
***************
*** 2272,2276 ****
  
  
!    @=$$@> = 0;
  };
  
--- 2272,2276 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 2316,2320 ****
     cerr_strm  << ">> ";
  
!    if (entry == 0 || entry->object == 0)
        {
            cerr_strm << "(unknown macro_vector)";
--- 2316,2320 ----
     cerr_strm  << ">> ";
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << "(unknown macro_vector)";
***************
*** 2341,2345 ****
  
  
!    @=$$@> = 0;
  };
  
--- 2341,2345 ----
  
  
!    @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 2408,2412 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 2408,2412 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2476,2480 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 2476,2480 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2544,2548 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 2544,2548 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2628,2632 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 2628,2632 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2699,2703 ****
       }  /* |else| (|!bpv|)  */
  
!    @=$$@> = 0;
  
  };
--- 2699,2703 ----
       }  /* |else| (|!bpv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2766,2770 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 2766,2770 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2798,2802 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 2798,2802 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2827,2831 ****
                          parameter);
  
!    @=$$@> = 0;
  
  
--- 2827,2831 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  
***************
*** 2856,2860 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 2856,2860 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2885,2889 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 2885,2889 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2912,2916 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 2912,2916 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 2940,2944 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 2940,2944 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3009,3013 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3009,3013 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3077,3081 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3077,3081 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3142,3146 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3142,3146 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3211,3215 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3211,3215 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3281,3285 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3281,3285 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3348,3352 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3348,3352 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3415,3419 ****
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = 0;
  
  };
--- 3415,3419 ----
       }  /* |else| (|!pv|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3441,3445 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 3441,3445 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3469,3473 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 3469,3473 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3496,3500 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 3496,3500 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3524,3528 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 3524,3528 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3551,3555 ****
                          parameter);
  
!    @=$$@> = 0;
  
  };
--- 3551,3555 ----
                          parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 3618,3622 ****
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = 0;
  
  };
--- 3618,3622 ----
       }  /* |else| (|!pv || pv->ctr <= 0|)  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/pspglb.web 3DLDF-2.0.3/src/pspglb.web
*** 3DLDF-2.0.2/src/pspglb.web	Thu Nov  7 13:38:22 2013
--- 3DLDF-2.0.3/src/pspglb.web	Fri Dec 13 15:06:19 2013
***************
*** 5,9 ****
  @q This file is part of 3DLDF, a package for three-dimensional drawing. @>
  @q Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,        @>
! @q 2011, 2012, 2013 The Free Software Foundation                                    @>
  
  @q GNU 3DLDF is free software; you can redistribute it and/or modify @>
--- 5,9 ----
  @q This file is part of 3DLDF, a package for three-dimensional drawing. @>
  @q Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,        @>
! @q 2011, 2012, 2013 The Free Software Foundation                        @>
  
  @q GNU 3DLDF is free software; you can redistribute it and/or modify @>
***************
*** 173,178 ****
  @<Type definitions@>=
  
! #define LDF_REAL_FLOAT  0 
! #define LDF_REAL_DOUBLE 1
  
  #if LDF_REAL_FLOAT
--- 173,178 ----
  @<Type definitions@>=
  
! #define LDF_REAL_FLOAT  1 
! #define LDF_REAL_DOUBLE 0
  
  #if LDF_REAL_FLOAT
***************
*** 436,440 ****
  #endif /* |HAVE_PTHREAD_H|  */@; 
  
! @q *** |Mutex_Type| functions.  @>
  @ {\bf Mutex\_Type} functions.
  
--- 436,440 ----
  #endif /* |HAVE_PTHREAD_H|  */@; 
  
! @q *** (3) |Mutex_Type| functions.  @>
  @ {\bf Mutex\_Type} functions.
  
***************
*** 466,470 ****
        {
            cerr << "Entering `Mutex_Type' default constructor."
!                << endl << flush;
        }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 466,470 ----
        {
            cerr << "Entering `Mutex_Type' default constructor."
!                << endl;
        }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 487,491 ****
                   cerr << "In `Io_Struct::Io_Struct(void)':"
                        << endl << "`pthread_mutex_init' succeeded!"
!                       << endl << flush;
               }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 487,491 ----
                   cerr << "In `Io_Struct::Io_Struct(void)':"
                        << endl << "`pthread_mutex_init' succeeded!"
!                       << endl;
               }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 496,500 ****
         {
             cerr << "Exiting `Mutex_Type' default constructor."
!                 << endl << flush;
         }      
  #endif /* |DEBUG_COMPILE|  */@; 
--- 496,500 ----
         {
             cerr << "Exiting `Mutex_Type' default constructor."
!                 << endl;
         }      
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 1630,1634 ****
     if (DEBUG)
       cerr << "Entering `Thread_Info_Type' destructor."
!           << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1630,1634 ----
     if (DEBUG)
       cerr << "Entering `Thread_Info_Type' destructor."
!           << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1641,1645 ****
     if (DEBUG)
       cerr << "Exiting `Thread_Info_Type' destructor."
!           << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1641,1645 ----
     if (DEBUG)
       cerr << "Exiting `Thread_Info_Type' destructor."
!           << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1671,1680 ****
     if (DEBUG)
       cerr << "Entering `Thread_Info_Type::destroy_key_value'."
!           << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
    Thread_Info_Type* t = static_cast<Thread_Info_Type*>(arg);
  
!   if (t != 0)
      delete t;
    t = 0;
--- 1671,1680 ----
     if (DEBUG)
       cerr << "Entering `Thread_Info_Type::destroy_key_value'."
!           << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
    Thread_Info_Type* t = static_cast<Thread_Info_Type*>(arg);
  
!   if (t != static_cast<Thread_Info_Type*>(0))
      delete t;
    t = 0;
***************
*** 1683,1687 ****
     if (DEBUG)
       cerr << "Exiting `Thread_Info_Type::destroy_key_value'."
!           << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 1683,1687 ----
     if (DEBUG)
       cerr << "Exiting `Thread_Info_Type::destroy_key_value'."
!           << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1754,1758 ****
  @<Define |Thread_Info_Type| functions@>=
  
!   if (v == 0 && !create_if_none)
      {
  
--- 1754,1758 ----
  @<Define |Thread_Info_Type| functions@>=
  
!   if (v == static_cast<void*>(0) && !create_if_none)
      {
  
***************
*** 1780,1784 ****
  
  
!   if (v != 0)
     {
  #if DEBUG_COMPILE
--- 1780,1784 ----
  
  
!   if (v != static_cast<void*>(0))
     {
  #if DEBUG_COMPILE
***************
*** 2001,2005 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
!    if (thread_info == 0)
       {
         string s = "";
--- 2001,2005 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
!    if (thread_info == static_cast<Thread_Info_Type*>(0))
       {
         string s = "";
***************
*** 2046,2050 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
!    if (thread_info == 0)
       {
         return 0;
--- 2046,2050 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
!    if (thread_info == static_cast<Thread_Info_Type*>(0))
       {
         return 0;
***************
*** 2206,2209 ****
--- 2206,2213 ----
  \initials{LDF 2007.07.03.}
  Removed years previous to ``2007'' from the |string| |COPYRIGHT_3DLDF|.
+ 
+ \initials{LDF 2013.12.12.}
+ Added |extern const float ZERO_REAL| it is initialized to |0.0F| or |0.0D|, depending
+ on the values of |LDF_REAL_FLOAT| and |LDF_REAL_DOUBLE|.
  \ENDLOG 
  
***************
*** 2213,2225 ****
    extern const bool ldf_real_float  = 1;
    extern const bool ldf_real_double = 0;
  #elif LDF_REAL_DOUBLE
    extern const bool ldf_real_float  = 0;
    extern const bool ldf_real_double = 1;
  #else /* Defaults.  LDF 2003.12.17.  */
    extern const bool ldf_real_float  = 1;
    extern const bool ldf_real_double = 0;
  #endif
  
! extern const string VERSION_3DLDF = "2.0";
  extern const string COPYRIGHT_3DLDF 
     = "Copyright (C) 2013 The Free Software Foundation";
--- 2217,2232 ----
    extern const bool ldf_real_float  = 1;
    extern const bool ldf_real_double = 0;
+   extern const float ZERO_REAL = 0.0F;
  #elif LDF_REAL_DOUBLE
    extern const bool ldf_real_float  = 0;
    extern const bool ldf_real_double = 1;
+   extern const double ZERO_REAL = 0.0D;
  #else /* Defaults.  LDF 2003.12.17.  */
    extern const bool ldf_real_float  = 1;
    extern const bool ldf_real_double = 0;
+   extern const float ZERO_REAL = 0.0F;
  #endif
  
! extern const string VERSION_3DLDF = "2.0.3";
  extern const string COPYRIGHT_3DLDF 
     = "Copyright (C) 2013 The Free Software Foundation";
***************
*** 2227,2233 ****
     = "GNU 3DLDF comes with ABSOLUTELY NO WARRANTY;\n\
  for details see the file COPYING,\n\
! which you should have received\n\
! in the distribution of GNU 3DLDF 2.0.\n\
! This is Free Software, and you are welcome\n\
  to redistribute it under certain conditions;\n\
  for details, again, see the file COPYING.\n\n\
--- 2234,2240 ----
     = "GNU 3DLDF comes with ABSOLUTELY NO WARRANTY;\n\
  for details see the file COPYING,\n\
! which you should have received \
! in the distribution of GNU 3DLDF 2.0.3\n\
! This is Free Software, and you are welcome \
  to redistribute it under certain conditions;\n\
  for details, again, see the file COPYING.\n\n\
***************
*** 2247,2250 ****
--- 2254,2258 ----
  extern const bool ldf_real_float;
  extern const bool ldf_real_double;
+ extern const float ZERO_REAL;
  
  @ @:!! TO DO@> TO DO:  Find out why the library
***************
*** 2412,2416 ****
             << "`cerr_mutex.lock' failed."
             << endl << "Exiting with return value " << status
!            << "." << endl << flush;
        return status;
      }
--- 2420,2424 ----
             << "`cerr_mutex.lock' failed."
             << endl << "Exiting with return value " << status
!            << "." << endl;
        return status;
      }
***************
*** 2425,2429 ****
    if(get_char)
      {
!       cerr << "Type <RETURN> to continue.\n" << flush; 
        getchar(); /* Don't delete this!  */ 
      }
--- 2433,2437 ----
    if(get_char)
      {
!       cerr << "Type <RETURN> to continue.\n"; 
        getchar(); /* Don't delete this!  */ 
      }
***************
*** 2437,2441 ****
             << "`cerr_mutex.unlock' failed."
             << endl << "Exiting with return value " 
!            << status << "." << endl << flush;
        return status;
      }
--- 2445,2449 ----
             << "`cerr_mutex.unlock' failed."
             << endl << "Exiting with return value " 
!            << status << "." << endl;
        return status;
      }
***************
*** 2508,2513 ****
         return Real_Pair(INVALID_REAL, INVALID_REAL);
  
!     p.first  = (a == 0) ? INVALID_REAL : q/a;
!     p.second = (q == 0) ? INVALID_REAL : c/q;
  
      return p;
--- 2516,2521 ----
         return Real_Pair(INVALID_REAL, INVALID_REAL);
  
!     p.first  = (a == ZERO_REAL) ? INVALID_REAL : q/a;
!     p.second = (q == ZERO_REAL) ? INVALID_REAL : c/q;
  
      return p;
***************
*** 2786,2792 ****
  Run_State::show(void)
  {
!   cout << "multithread_input == " << multithread_input << endl << flush;
!   cout << "multithread_output == " << multithread_output << endl << flush;
!   cout << "multithread_include == " << multithread_include << endl << flush;
    return;
  }
--- 2794,2800 ----
  Run_State::show(void)
  {
!   cout << "multithread_input == " << multithread_input << endl;
!   cout << "multithread_output == " << multithread_output << endl;
!   cout << "multithread_include == " << multithread_include << endl;
    return;
  }
***************
*** 2954,2959 ****
      {
        if (verbose)
!         cout << "Processor is little-endian." << endl << endl 
!              << flush;
        return 0;
      }
--- 2962,2967 ----
      {
        if (verbose)
!         cout << "Processor is little-endian." << endl << endl;
! 
        return 0;
      }
***************
*** 2961,2966 ****
      {
        if (verbose)
!         cout << "Processor is big-endian." << endl << endl 
!              << flush;
        return 1;
      }
--- 2969,2974 ----
      {
        if (verbose)
!         cout << "Processor is big-endian." << endl << endl;
! 
        return 1;
      }
***************
*** 2969,2973 ****
        cerr << "ERROR! In System::get_endianness:\n"
             << "Can't determine endianness. Returning -1"
!            << endl << endl << flush;
        return -1;
      }
--- 2977,2981 ----
        cerr << "ERROR! In System::get_endianness:\n"
             << "Can't determine endianness. Returning -1"
!            << endl << endl;
        return -1;
      }
***************
*** 5202,5205 ****
--- 5210,5214 ----
  #define LDF_PSPGLB_H_KNOWN
  @<Type definitions@>@;
+ typedef void* yyscan_t;
  @<Forward declarations@>@;
  @<Utility classes@>@;
diff -rc2P 3DLDF-2.0.2/src/psphexpr.w 3DLDF-2.0.3/src/psphexpr.w
*** 3DLDF-2.0.2/src/psphexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/psphexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 90,94 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 90,94 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 157,166 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 157,166 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Sphere>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 177,181 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 177,181 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pspvexpr.w 3DLDF-2.0.3/src/pspvexpr.w
*** 3DLDF-2.0.2/src/pspvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pspvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/pstrexpr.w 3DLDF-2.0.3/src/pstrexpr.w
*** 3DLDF-2.0.2/src/pstrexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pstrexpr.w	Fri Dec 13 15:06:19 2013
***************
*** 110,114 ****
     entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!    if (entry == 0 || entry->object == 0)
        {
  
--- 110,114 ----
     entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 146,150 ****
        @=$$@> = Scan_Parse::string_primary_rule_func(@=$1@>, parameter);
     else
!       @=$$@> = 0;
  
  };
--- 146,150 ----
        @=$$@> = Scan_Parse::string_primary_rule_func(@=$1@>, parameter);
     else
!       @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 249,253 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            cerr_strm << thread_name 
--- 249,253 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<string>*>(0))
        {
            cerr_strm << thread_name 
***************
*** 266,270 ****
            delete s;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 266,270 ----
            delete s;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 294,298 ****
            delete s;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 294,298 ----
            delete s;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 797,801 ****
  
  @<Define rules@>=
!    if (s == 0 || t == 0)
        {
  
--- 797,801 ----
  
  @<Define rules@>=
!    if (s == static_cast<string*>(0) || t == static_cast<string*>(0))
        {
  
diff -rc2P 3DLDF-2.0.2/src/pstvexpr.w 3DLDF-2.0.3/src/pstvexpr.w
*** 3DLDF-2.0.2/src/pstvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pstvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ptfvexpr.w 3DLDF-2.0.3/src/ptfvexpr.w
*** 3DLDF-2.0.2/src/ptfvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptfvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 101,108 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 101,108 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ptglexpr.w 3DLDF-2.0.3/src/ptglexpr.w
*** 3DLDF-2.0.2/src/ptglexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptglexpr.w	Fri Dec 13 12:51:31 2013
***************
*** 88,92 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 88,92 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 155,164 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 155,164 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Triangle>*>(0))
        {
  
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 175,179 ****
            delete r;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 175,179 ----
            delete r;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ptgvexpr.w 3DLDF-2.0.3/src/ptgvexpr.w
*** 3DLDF-2.0.2/src/ptgvexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptgvexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 116,120 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 116,120 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 133,137 ****
        cerr_strm.str("");
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 133,137 ----
        cerr_strm.str("");
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 307,311 ****
       {
           
!          @=$$@> = 0;
  
       } /* |if (status != 0)|  */
--- 307,311 ----
       {
           
!          @=$$@> = static_cast<void*>(0);
  
       } /* |if (status != 0)|  */
diff -rc2P 3DLDF-2.0.2/src/ptokdecl.w 3DLDF-2.0.3/src/ptokdecl.w
*** 3DLDF-2.0.2/src/ptokdecl.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptokdecl.w	Wed Dec 11 18:52:33 2013
***************
*** 645,650 ****
    if (DEBUG)
      {
!       cerr << "$2 == " << @=$2@> << endl << flush;
!       cerr << "$$ == " << @=$$@> << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */ 
--- 645,650 ----
    if (DEBUG)
      {
!       cerr << "$2 == " << @=$2@> << endl;
!       cerr << "$$ == " << @=$$@> << endl;
      }
  #endif /* |DEBUG_COMPILE|  */ 
***************
*** 688,694 ****
    if (DEBUG)
      {
!       cerr << "$2 == " << @=$2@> << endl << flush;
!       cerr << "$3 == " << @=$3@> << endl << flush;
!       cerr << "$$ == " << @=$$@> << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */ 
--- 688,694 ----
    if (DEBUG)
      {
!       cerr << "$2 == " << @=$2@> << endl;
!       cerr << "$3 == " << @=$3@> << endl;
!       cerr << "$$ == " << @=$$@> << endl;
      }
  #endif /* |DEBUG_COMPILE|  */ 
diff -rc2P 3DLDF-2.0.2/src/ptrfcmnd.w 3DLDF-2.0.3/src/ptrfcmnd.w
*** 3DLDF-2.0.2/src/ptrfcmnd.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptrfcmnd.w	Fri Dec 13 15:06:19 2013
***************
*** 81,85 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  
--- 81,85 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  
***************
*** 106,110 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  
--- 106,110 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  
***************
*** 134,138 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 134,138 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 158,162 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 158,162 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 184,188 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 184,188 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 208,212 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 208,212 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 232,236 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 232,236 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 256,260 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 256,260 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 280,284 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 280,284 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 306,310 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 306,310 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 330,334 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 330,334 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 354,358 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 354,358 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 381,385 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 381,385 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 405,409 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 405,409 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 431,435 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 431,435 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 457,461 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 457,461 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 481,485 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 481,485 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 505,509 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 505,509 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 538,542 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 538,542 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 571,575 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 571,575 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 604,608 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 604,608 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 637,641 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 637,641 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 670,674 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 670,674 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 703,707 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 703,707 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 736,740 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 736,740 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 769,773 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 769,773 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 802,806 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 802,806 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 835,839 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 835,839 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 868,872 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 868,872 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 901,905 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 901,905 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 934,938 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 934,938 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 967,971 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 967,971 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1000,1004 ****
                                 pv);
  
!   @=$$@> = 0;
  
  };
--- 1000,1004 ----
                                 pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1055,1059 ****
                                pv);
  
!   @=$$@> = 0;
  
  };
--- 1055,1059 ----
                                pv);
  
!   @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1080,1086 ****
     Point* p = static_cast<Point*>(@=$4@>); 
  
!    if (p == 0 || *p == INVALID_POINT)
     {
!         @=$$@> = 0;
     }
     else
--- 1080,1086 ----
     Point* p = static_cast<Point*>(@=$4@>); 
  
!    if (p == static_cast<Point*>(0) || *p == INVALID_POINT)
     {
!         @=$$@> = static_cast<void*>(0);
     }
     else
***************
*** 1100,1104 ****
    
     delete p;
!    @=$$@> = 0;
  
  };
--- 1100,1104 ----
    
     delete p;
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1137,1141 ****
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = 0;
  
  };
--- 1137,1141 ----
                                  static_cast<Pointer_Vector<real>*>(@=$3@>));
  
!     @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1285,1289 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 1285,1289 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 1306,1310 ****
          cerr_strm.str("");
          
!         @=$$@> = 0;
       
  
--- 1306,1310 ----
          cerr_strm.str("");
          
!         @=$$@> = static_cast<void*>(0);
       
  
***************
*** 1337,1341 ****
  @<Define rules@>=
  
!   if (t == 0)
      {
  
--- 1337,1341 ----
  @<Define rules@>=
  
!   if (t == static_cast<Transform*>(0))
      {
  
***************
*** 1358,1362 ****
        cerr_strm.str("");
        
!       @=$$@> = 0;
  
      } /* |if (t == 0)|  */
--- 1358,1362 ----
        cerr_strm.str("");
        
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (t == 0)|  */
***************
*** 1398,1402 ****
        delete t;
  
!       @=$$@> = 0;
  
      }  /* |else| (|t != 0|)  */
--- 1398,1402 ----
        delete t;
  
!       @=$$@> = static_cast<void*>(0);
  
      }  /* |else| (|t != 0|)  */
***************
*** 1431,1435 ****
       } 
  
!      @=$$@> = 0;
  
  };
--- 1431,1435 ----
       } 
  
!      @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 1457,1461 ****
       } 
  
!      @=$$@> = 0;
  
  };
--- 1457,1461 ----
       } 
  
!      @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/ptrnexpr.w 3DLDF-2.0.3/src/ptrnexpr.w
*** 3DLDF-2.0.2/src/ptrnexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/ptrnexpr.w	Fri Dec 13 15:06:19 2013
***************
*** 94,98 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 94,98 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>); 
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 163,171 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 163,171 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Transform>*>(0))
        {
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 183,187 ****
            delete p;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 183,187 ----
            delete p;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
***************
*** 250,254 ****
      }
      else
!        @=$$@> = 0;
  
  };
--- 250,254 ----
      }
      else
!        @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 284,288 ****
      }
      else
!        @=$$@> = 0;
  };
  
--- 284,288 ----
      }
      else
!        @=$$@> = static_cast<void*>(0);
  };
  
***************
*** 719,723 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
       {
  
--- 719,723 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
       {
  
***************
*** 828,832 ****
  @<Define rules@>=
  
!    if (q == 0 || *q == INVALID_POINT)
       {
  
--- 828,832 ----
  @<Define rules@>=
  
!    if (q == static_cast<Point*>(0) || *q == INVALID_POINT)
       {
  
***************
*** 1110,1114 ****
  @<Define rules@>=
  
!   if (t == 0)
       {
  
--- 1110,1114 ----
  @<Define rules@>=
  
!   if (t == static_cast<Transform*>(0))
       {
  
***************
*** 1183,1187 ****
  @<Define rules@>=
  
!   if (t == 0)
       {
  
--- 1183,1187 ----
  @<Define rules@>=
  
!   if (t == static_cast<Transform*>(0))
       {
  
diff -rc2P 3DLDF-2.0.2/src/pullexpr.w 3DLDF-2.0.3/src/pullexpr.w
*** 3DLDF-2.0.2/src/pullexpr.w	Thu Nov  7 13:36:03 2013
--- 3DLDF-2.0.3/src/pullexpr.w	Fri Dec 13 11:59:34 2013
***************
*** 88,95 ****
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!     if (entry == 0 || entry->object == 0)
        {
  
!         @=$$@> = 0;
  
        }  /* |if (entry == 0 || entry->object == 0)| */
--- 88,95 ----
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
!         @=$$@> = 0ULL;
  
        }  /* |if (entry == 0 || entry->object == 0)| */
diff -rc2P 3DLDF-2.0.2/src/pullvxpr.w 3DLDF-2.0.3/src/pullvxpr.w
*** 3DLDF-2.0.2/src/pullvxpr.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/pullvxpr.w	Fri Dec 13 11:59:33 2013
***************
*** 90,97 ****
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
     
!    if (entry == 0 || entry->object == 0)
       {
  
!        @=$$@> = 0;
  
       }  /* |if (entry == 0 || entry->object == 0)| */
--- 90,97 ----
     Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
     
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
       {
  
!        @=$$@> = static_cast<void*>(0);
  
       }  /* |if (entry == 0 || entry->object == 0)| */
diff -rc2P 3DLDF-2.0.2/src/pvariabl.w 3DLDF-2.0.3/src/pvariabl.w
*** 3DLDF-2.0.2/src/pvariabl.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/pvariabl.w	Fri Dec 13 15:06:19 2013
***************
*** 3117,3121 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
            cerr_strm << thread_name 
--- 3117,3121 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << thread_name 
***************
*** 3133,3137 ****
  
  
!           @=$$@> = 0;
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
--- 3133,3137 ----
  
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 3162,3166 ****
                   cerr_strm.str("");
  
!                  @=$$@> = 0;                
  
  
--- 3162,3166 ----
                   cerr_strm.str("");
  
!                  @=$$@> = static_cast<void*>(0);                
  
  
***************
*** 3184,3188 ****
  @q ******** (8) @> 
  
!               if (array_entry == 0)
                   {
                       cerr_strm << thread_name 
--- 3184,3188 ----
  @q ******** (8) @> 
  
!               if (array_entry == static_cast<Id_Map_Entry_Node>(0))
                   {
                       cerr_strm << thread_name 
***************
*** 3201,3205 ****
                       cerr_strm.str("");
  
!                      @=$$@> = 0;                                 
  
  
--- 3201,3205 ----
                       cerr_strm.str("");
  
!                      @=$$@> = static_cast<void*>(0);                                 
  
  
***************
*** 3360,3364 ****
  @<Define rules@>=
  
!    if (entry == 0 || entry->object == 0)
        {
            cerr_strm << thread_name 
--- 3360,3364 ----
  @<Define rules@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << thread_name 
***************
*** 3376,3380 ****
  
  
!           @=$$@> = 0;
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
--- 3376,3380 ----
  
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (entry == 0 || entry->object == 0)|  */
***************
*** 3405,3409 ****
                   cerr_strm.str("");
  
!                  @=$$@> = 0;                
  
  
--- 3405,3409 ----
                   cerr_strm.str("");
  
!                  @=$$@> = static_cast<void*>(0);                
  
  
***************
*** 3427,3431 ****
  @q ******** (8) @> 
  
!               if (array_entry == 0)
                   {
                       cerr_strm << thread_name 
--- 3427,3431 ----
  @q ******** (8) @> 
  
!               if (array_entry == static_cast<Id_Map_Entry_Node>(0))
                   {
                       cerr_strm << thread_name 
***************
*** 3444,3448 ****
                       cerr_strm.str("");
  
!                      @=$$@> = 0;                                 
  
  
--- 3444,3448 ----
                       cerr_strm.str("");
  
!                      @=$$@> = static_cast<void*>(0);                                 
  
  
diff -rc2P 3DLDF-2.0.2/src/pvcmncmd.w 3DLDF-2.0.3/src/pvcmncmd.w
*** 3DLDF-2.0.2/src/pvcmncmd.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/pvcmncmd.w	Fri Dec 13 15:06:19 2013
***************
*** 108,112 ****
        }  /* |if (status != 0)|  */
  
!    @=$$@> = 0;
  
  };
--- 108,112 ----
        }  /* |if (status != 0)|  */
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 150,154 ****
                                  @=$3@>);
  
!    @=$$@> = 0;
  
  };
--- 150,154 ----
                                  @=$3@>);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 195,199 ****
                                  static_cast<Point*>(0));
  
!    @=$$@> = 0;
  
  };
--- 195,199 ----
                                  static_cast<Point*>(0));
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 234,238 ****
  @q ***** (5)@> 
  
!    if (entry == 0)
        {
  #if 0 
--- 234,238 ----
  @q ***** (5)@> 
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
  #if 0 
***************
*** 258,262 ****
  @q ****** (6)@> 
  
!           if (entry->object == 0)
               {
                
--- 258,262 ----
  @q ****** (6)@> 
  
!           if (entry->object == static_cast<void*>(0))
               {
                
***************
*** 283,287 ****
  @q ******* (7)@> 
  
!           if (root == 0)
               {
  #if 0 
--- 283,287 ----
  @q ******* (7)@> 
  
!           if (root == static_cast<Id_Map_Entry_Node>(0))
               {
  #if 0 
***************
*** 313,317 ****
  @q ******** (8)@> 
  
!                 if (temp_entry == 0)
                     {
  #if 0 
--- 313,317 ----
  @q ******** (8)@> 
  
!                 if (temp_entry == static_cast<Id_Map_Entry_Node>(0))
                     {
  #if 0 
***************
*** 341,345 ****
  
  @q ********* (9).@>  
!                       if (temp_entry->object == 0)
                           {
                                Picture* p;
--- 341,345 ----
  
  @q ********* (9).@>  
!                       if (temp_entry->object == static_cast<void*>(0))
                           {
                                Picture* p;
***************
*** 382,386 ****
  @q ***** (5)@> 
  
!    @=$$@> = 0;
  
  };
--- 382,386 ----
  @q ***** (5)@> 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/rectangs.web 3DLDF-2.0.3/src/rectangs.web
*** 3DLDF-2.0.2/src/rectangs.web	Thu Nov  7 13:38:22 2013
--- 3DLDF-2.0.3/src/rectangs.web	Fri Dec 13 15:06:19 2013
***************
*** 237,243 ****
  
      
!     if (angle_x != 0 || angle_y != 0
!         || angle_z != 0)   /* Rotation around the x-axis, 
!                               y-axis, and z-axis. */
        {
          bot_lft.rotate(angle_x, angle_y, angle_z);
--- 237,243 ----
  
      
!     if (angle_x != ZERO_REAL || angle_y != ZERO_REAL
!         || angle_z != ZERO_REAL)   /* Rotation around the x-axis, 
!                                       y-axis, and z-axis. */
        {
          bot_lft.rotate(angle_x, angle_y, angle_z);
***************
*** 589,593 ****
  @<Define |Rectangle| functions@>=
  
!  if (rectangle_reflection == 0)
   {
    try
--- 589,593 ----
  @<Define |Rectangle| functions@>=
  
!  if (rectangle_reflection == static_cast<Rectangle*>(0))
   {
    try
***************
*** 831,835 ****
      {
        cerr << "ERROR: Rectangles have 4 corners, "
!         << "numbered 0 through 3.\nReturning INVALID_POINT.\n" << flush;
        return INVALID_POINT;
          
--- 831,835 ----
      {
        cerr << "ERROR: Rectangles have 4 corners, "
!         << "numbered 0 through 3.\nReturning INVALID_POINT.\n";
        return INVALID_POINT;
          
***************
*** 871,876 ****
        {
            cerr << "ERROR: Rectangles have 4 mid_points, "
!             << "numbered 0 through 3.\nReturning INVALID_POINT.\n"
!               << flush;
            return INVALID_POINT;
        }
--- 871,876 ----
        {
            cerr << "ERROR: Rectangles have 4 mid_points, "
!             << "numbered 0 through 3.\nReturning INVALID_POINT.\n";
! 
            return INVALID_POINT;
        }
diff -rc2P 3DLDF-2.0.2/src/rhtchdrn.web 3DLDF-2.0.3/src/rhtchdrn.web
*** 3DLDF-2.0.2/src/rhtchdrn.web	Sun Nov 10 16:08:24 2013
--- 3DLDF-2.0.3/src/rhtchdrn.web	Mon Nov 11 18:43:05 2013
***************
*** 404,408 ****
      p[2].rotate(p[1], p[3]);
  
!     rhombus->set("--", true, &p[0], &p[1], &p[2], &p[3], 0);
  
      return rhombus; 
--- 404,408 ----
      p[2].rotate(p[1], p[3]);
  
!     rhombus->set("--", true, &p[0], &p[1], &p[2], &p[3], static_cast<Point*>(0));
  
      return rhombus; 
***************
*** 592,596 ****
     p[2].rotate(p[1], p[3]);
  
!    rhombus[0].set("--", true, &p[0], &p[1], &p[2], &p[3], 0);
  
     *pv += create_new<Polygon>(rhombus[0]);
--- 592,596 ----
     p[2].rotate(p[1], p[3]);
  
!    rhombus[0].set("--", true, &p[0], &p[1], &p[2], &p[3], static_cast<Point*>(0));
  
     *pv += create_new<Polygon>(rhombus[0]);
***************
*** 850,854 ****
     p[9].rotate(p[8], p[5], -angle);
  
!    tab.set("--", true, &p[4], &p[7], &p[9], &p[5], 0);
  
     *tv += create_new<Path>(tab);
--- 850,854 ----
     p[9].rotate(p[8], p[5], -angle);
  
!    tab.set("--", true, &p[4], &p[7], &p[9], &p[5], static_cast<Point*>(0));
  
     *tv += create_new<Path>(tab);
diff -rc2P 3DLDF-2.0.2/src/scan.web 3DLDF-2.0.3/src/scan.web
*** 3DLDF-2.0.2/src/scan.web	Sun Aug 11 17:38:23 2013
--- 3DLDF-2.0.3/src/scan.web	Fri Dec 13 15:40:52 2013
***************
*** 166,171 ****
  \initials{LDF 2004.04.08.} 
  
- \functexi{int yylex(YYSTYPE* value, YYLTYPE* location, void* parameter)}
- 
  \LOG
  \initials{LDF 2004.04.08.}  
--- 166,169 ----
***************
*** 218,222 ****
  int
  yylex(YYSTYPE* value,
-       YYLTYPE* location,
        void* parameter)
  {
--- 216,219 ----
***************
*** 268,272 ****
  @<Define scanning functions@>=
  
!   if (scanner_node == 0)
      {
  
--- 265,269 ----
  @<Define scanning functions@>=
  
!   if (scanner_node == static_cast<Scanner_Node>(0))
      {
  
***************
*** 387,391 ****
                   << endl;
        
!        if (rescan_value == 0)
           cerr_strm << "`rescan_value' == 0" << endl;
         else
--- 384,388 ----
                   << endl;
        
!        if (rescan_value == static_cast<void*>(0))
           cerr_strm << "`rescan_value' == 0" << endl;
         else
***************
*** 412,416 ****
  @<Define scanning functions@>=
  
!        if (rescan_value != 0 || !rescan_retest)
           {
  
--- 409,413 ----
  @<Define scanning functions@>=
  
!        if (rescan_value != static_cast<void*>(0) || !rescan_retest)
           {
  
***************
*** 526,530 ****
  
             curr_catcode = sub_yylex(value,
-                                     location,
                                      scanner_node);
  
--- 523,526 ----
***************
*** 548,552 ****
                 prev_catcode = curr_catcode;
                 curr_catcode = sub_yylex(value,
-                                         location,
                                          scanner_node);
  
--- 544,547 ----
***************
*** 564,568 ****
                     prev_catcode = curr_catcode;
                     curr_catcode = sub_yylex(value,
-                                             location,
                                              scanner_node);
                     
--- 559,562 ----
***************
*** 593,597 ****
        prev_catcode = curr_catcode;
        curr_catcode = sub_yylex(value,
-                                location,
                                 scanner_node);
  
--- 587,590 ----
***************
*** 890,894 ****
  @<Define scanning functions@>=
  
!    if (entry == 0)
       {
  #if DEBUG_COMPILE
--- 883,887 ----
  @<Define scanning functions@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
       {
  #if DEBUG_COMPILE
***************
*** 933,937 ****
                 cerr << value->string_value << " is a spark. Will return " 
                      << name_map[entry->get_type()]
!                     << endl << flush;
               }
  
--- 926,930 ----
                 cerr << value->string_value << " is a spark. Will return " 
                      << name_map[entry->get_type()]
!                     << endl;
               }
  
***************
*** 1085,1089 ****
  int
  sub_yylex(YYSTYPE *value,
-           YYLTYPE *location,
            Scanner_Node scanner_node);
  
--- 1078,1081 ----
***************
*** 1095,1099 ****
  int
  sub_yylex(YYSTYPE *value,
-           YYLTYPE *location,
            Scanner_Node scanner_node)
  {
--- 1087,1090 ----
***************
*** 1144,1148 ****
  @<Define scanning functions@>=
  
!   if (scanner_node == 0)
      {
  
--- 1135,1139 ----
  @<Define scanning functions@>=
  
!   if (scanner_node == static_cast<Scanner_Node>(0))
      {
  
***************
*** 1240,1243 ****
--- 1231,1235 ----
   loop_start:
  
+ #if 0 
    curr_position = location->position;
    start_line = location->last_line;
***************
*** 1245,1249 ****
    start_column = location->last_column;
    curr_column = start_column; 
! 
  
    for (bool first_time = true;;)
--- 1237,1247 ----
    start_column = location->last_column;
    curr_column = start_column; 
! #else
!   curr_position = 0;
!   start_line = 0;
!   curr_line = start_line;
!   start_column = 0;
!   curr_column = start_column; 
! #endif 
  
    for (bool first_time = true;;)
***************
*** 1420,1423 ****
--- 1418,1422 ----
                 ++curr_column;
           
+ #if 0 
            location->first_line   = start_line;
            location->first_column = start_column;
***************
*** 1425,1428 ****
--- 1424,1428 ----
            location->last_column  = curr_column;
            location->position     = curr_position;
+ #endif 
  
  
***************
*** 2015,2018 ****
--- 2015,2019 ----
  #endif /* |DEBUG_COMPILE|  */@; 
   
+ #if 0 
           location->first_line    = start_line;
           location->first_column = start_column;
***************
*** 2020,2023 ****
--- 2021,2025 ----
           location->last_column  = curr_column;
           location->position     = curr_position;
+ #endif 
                    
           goto loop_start;
***************
*** 2222,2225 ****
--- 2224,2228 ----
                            cerr_strm.str();
  
+ #if 0 
                            location->first_line    = start_line;
            		  location->first_column = start_column;
***************
*** 2227,2230 ****
--- 2230,2234 ----
            		  location->last_column  = curr_column;
            		  location->position     = curr_position;
+ #endif 
  
                            scanner_node->set_token_string(curr_token_string);
***************
*** 2256,2259 ****
--- 2260,2264 ----
  #endif /* |DEBUG_COMPILE|  */@; 
                  
+ #if 0 
                            location->first_line    = start_line;
                            location->first_column = start_column;
***************
*** 2261,2264 ****
--- 2266,2270 ----
                            location->last_column  = curr_column;
                            location->position     = curr_position;
+ #endif 
  
                            if (scanner_node->get_in_type() == Io_Struct::STDIN_TYPE)
***************
*** 2524,2527 ****
--- 2530,2534 ----
  #endif /* |DEBUG_COMPILE|  */@; 
                
+ #if 0 
                         location->first_line   = start_line;
                         location->first_column = start_column;
***************
*** 2529,2532 ****
--- 2536,2540 ----
                         location->last_column  = curr_column;
                         location->position     = curr_position;
+ #endif 
   
                         goto loop_start;
***************
*** 2897,2900 ****
--- 2905,2909 ----
  @<Define scanning functions@>=
  
+ #if 0 
                location->first_line   = start_line;
                location->first_column = start_column;
***************
*** 2902,2905 ****
--- 2911,2915 ----
                location->last_column  = curr_column;
                location->position     = curr_position;
+ #endif 
  
  #if DEBUG_COMPILE
diff -rc2P 3DLDF-2.0.2/src/scanprse.web 3DLDF-2.0.3/src/scanprse.web
*** 3DLDF-2.0.2/src/scanprse.web	Thu Nov  7 13:38:22 2013
--- 3DLDF-2.0.3/src/scanprse.web	Fri Dec 13 15:06:33 2013
***************
*** 351,355 ****
  Scan_Parse::Picture_Output_Arg_Type::~Picture_Output_Arg_Type(void)
  {
!   if (picture != 0)
      {
        picture->clear();
--- 351,355 ----
  Scan_Parse::Picture_Output_Arg_Type::~Picture_Output_Arg_Type(void)
  {
!   if (picture != static_cast<Picture*>(0))
      {
        picture->clear();
***************
*** 358,362 ****
      }
  
!   if (focus != 0)
      {
        delete focus;
--- 358,362 ----
      }
  
!   if (focus != static_cast<Focus*>(0))
      {
        delete focus;
***************
*** 1222,1226 ****
  @<Define |Scan_Parse| functions@>= 
  
!       if (*(scanner_node->default_pen) != 0)
          {
             *out_stream << "pickup " << **(scanner_node->default_pen);
--- 1222,1226 ----
  @<Define |Scan_Parse| functions@>= 
  
!       if (*(scanner_node->default_pen) != static_cast<Pen*>(0))
          {
             *out_stream << "pickup " << **(scanner_node->default_pen);
***************
*** 1463,1467 ****
      = static_cast<Picture_Output_Arg_Type*>(arg); 
  
!   if (picture_ptr_arg == 0)
      {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::output_func()':"
--- 1463,1467 ----
      = static_cast<Picture_Output_Arg_Type*>(arg); 
  
!   if (picture_ptr_arg == static_cast<Picture_Output_Arg_Type*>(0))
      {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::output_func()':"
***************
*** 1585,1589 ****
    Output_Struct* out_stream = picture_ptr_arg->scanner_node->out[Run_State::METAPOST];
  
!   if (out_stream == 0)
       {
           cerr_strm << thread_name << "ERROR! In `Scan_Parse::output_func()':"
--- 1585,1589 ----
    Output_Struct* out_stream = picture_ptr_arg->scanner_node->out[Run_State::METAPOST];
  
!   if (out_stream == static_cast<Output_Struct*>(0))
       {
           cerr_strm << thread_name << "ERROR! In `Scan_Parse::output_func()':"
***************
*** 2296,2300 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (scanner_node->endfig_ptr != 0)
      {
        
--- 2296,2300 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (scanner_node->endfig_ptr != static_cast<void*>(0))
      {
        
***************
*** 2331,2335 ****
  
  
!       if (entry == 0 || entry->object == 0)
          {
  
--- 2331,2335 ----
  
  
!       if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
          {
  
***************
*** 2473,2477 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (p == 0)
      {
          cerr_strm << "ERROR! " << thread_name
--- 2473,2477 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (p == static_cast<Picture_Output_Arg_Type*>(0))
      {
          cerr_strm << "ERROR! " << thread_name
***************
*** 2979,2983 ****
    Thread_Info_Type* thread_info;
  
!   if (scanner_node == 0 /* Assume we're using threads.  */
  
        || (scanner_node->get_run_state()->multithread_input 
--- 2979,2983 ----
    Thread_Info_Type* thread_info;
  
!   if (scanner_node == static_cast<Scanner_Node>(0) /* Assume we're using threads.  */
  
        || (scanner_node->get_run_state()->multithread_input 
***************
*** 3444,3448 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry == 0)
      {
        cerr_strm << thread_name << "ERROR! In "
--- 3444,3448 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name << "ERROR! In "
***************
*** 3503,3507 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (expr == 0)
      {
        cerr_strm << thread_name << "ERROR! In "
--- 3503,3507 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (expr == static_cast<C*>(0))
      {
        cerr_strm << thread_name << "ERROR! In "
***************
*** 3554,3558 ****
    if (use_or_delete_expr)
      {
!        if (c == 0)   
           c = expr;
      
--- 3554,3558 ----
    if (use_or_delete_expr)
      {
!        if (c == static_cast<C*>(0))   
           c = expr;
      
***************
*** 3586,3590 ****
       {
  
!         if (c == 0)
             {
    
--- 3586,3590 ----
       {
  
!         if (c == static_cast<C*>(0))
             {
    
***************
*** 3919,3923 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry == 0)
      {
          cerr_strm << thread_name << "ERROR! "
--- 3919,3923 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
          cerr_strm << thread_name << "ERROR! "
***************
*** 3946,3950 ****
  
  
!   if (expr == 0)
      {
          cerr_strm << thread_name << "ERROR! "
--- 3946,3950 ----
  
  
!   if (expr == static_cast<const C*>(0))
      {
          cerr_strm << thread_name << "ERROR! "
***************
*** 3981,3985 ****
                   << "   `entry->name' == " << entry->name << ". ";
  
!       if (entry->object == 0)
          cerr_strm << "`entry->object' == 0. Allocating new object.";
        else
--- 3981,3985 ----
                   << "   `entry->name' == " << entry->name << ". ";
  
!       if (entry->object == static_cast<void*>(0))
          cerr_strm << "`entry->object' == 0. Allocating new object.";
        else
***************
*** 4015,4019 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry->object == 0)
       {
           try  
--- 4015,4019 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (entry->object == static_cast<void*>(0))
       {
           try  
***************
*** 4212,4216 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (entry == 0) 
         { 
             cerr_strm << thread_name 
--- 4212,4216 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0)) 
         { 
             cerr_strm << thread_name 
***************
*** 4239,4243 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_0 == 0) 
         { 
             cerr_strm << thread_name 
--- 4239,4243 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_0 == static_cast<Id_Map_Entry_Node>(0)) 
         { 
             cerr_strm << thread_name 
***************
*** 4332,4336 ****
                  << endl << "entry->name == " << entry->name << "." << endl;
  
!       if (entry->object == 0)
          cerr_strm << "entry->object == 0. Allocating new `picture'.";
        else
--- 4332,4336 ----
                  << endl << "entry->name == " << entry->name << "." << endl;
  
!       if (entry->object == static_cast<void*>(0))
          cerr_strm << "entry->object == 0. Allocating new `picture'.";
        else
***************
*** 4344,4348 ****
  
  
!   if (entry->object == 0)
      entry->object = static_cast<void*>(new(Picture));
  
--- 4344,4348 ----
  
  
!   if (entry->object == static_cast<void*>(0))
      entry->object = static_cast<void*>(new(Picture));
  
***************
*** 4777,4781 ****
  
  
!   if (entry == 0)
      {
        cerr_strm << thread_name 
--- 4777,4781 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name 
***************
*** 4810,4814 ****
                  <<  "entry->name == " << entry->name << endl;
  
!       if (entry->object == 0)
          cerr_strm << "entry->object == 0. Creating new `Picture'.";
        else
--- 4810,4814 ----
                  <<  "entry->name == " << entry->name << endl;
  
!       if (entry->object == static_cast<void*>(0))
          cerr_strm << "entry->object == 0. Creating new `Picture'.";
        else
***************
*** 4824,4828 ****
  
  
!   if (entry->object == 0)
      entry->object = static_cast<void*>(new(Picture));
  
--- 4824,4828 ----
  
  
!   if (entry->object == static_cast<void*>(0))
      entry->object = static_cast<void*>(new(Picture));
  
***************
*** 4836,4840 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (t == 0)
      {
  
--- 4836,4840 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (t == static_cast<Picture*>(0))
      {
  
***************
*** 5326,5330 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
  
--- 5326,5330 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 5363,5367 ****
                  << endl;
  
!       if (entry->object == 0)
          cerr_strm << "entry->object == 0. Allocating new `Point'.";
        else
--- 5363,5367 ----
                  << endl;
  
!       if (entry->object == static_cast<void*>(0))
          cerr_strm << "entry->object == 0. Allocating new `Point'.";
        else
***************
*** 5375,5379 ****
  
  
!   if (entry->object == 0)
      entry->object = static_cast<void*>(create_new<Point>(0));
  
--- 5375,5379 ----
  
  
!   if (entry->object == static_cast<void*>(0))
      entry->object = static_cast<void*>(create_new<Point>(0));
  
***************
*** 5392,5396 ****
    Id_Map_Entry_Node z_entry = scanner_node->lookup("curr_z");
  
!   if (y_entry == 0)
      {
        cerr_strm << thread_name << "WARNING! In `assign_point_numeric()':"
--- 5392,5396 ----
    Id_Map_Entry_Node z_entry = scanner_node->lookup("curr_z");
  
!   if (y_entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name << "WARNING! In `assign_point_numeric()':"
***************
*** 5416,5420 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (z_entry == 0)
      {
  
--- 5416,5420 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (z_entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 5488,5492 ****
    Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!   if (thread_info != 0)
      {
        thread_info->log_stream << s.str();
--- 5488,5492 ----
    Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!   if (thread_info != static_cast<Thread_Info_Type*>(0))
      {
        thread_info->log_stream << s.str();
***************
*** 5575,5579 ****
  
  
!   if (entry == 0)
      {
        cerr_strm << thread_name 
--- 5575,5579 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name 
***************
*** 5662,5666 ****
    Color* c;
  
!   if (entry->object == 0)
      {
        c = create_new<Color>(0);
--- 5662,5666 ----
    Color* c;
  
!   if (entry->object == static_cast<void*>(0))
      {
        c = create_new<Color>(0);
***************
*** 5833,5837 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
        cerr_strm << thread_name 
--- 5833,5837 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name 
***************
*** 5929,5933 ****
                    << "entry->name == " << entry->name << endl;
  
!         if (entry->object == 0)
             cerr_strm << "entry->object == 0. Allocating new `focus'.";
          else
--- 5929,5933 ----
                    << "entry->name == " << entry->name << endl;
  
!         if (entry->object == static_cast<void*>(0))
             cerr_strm << "entry->object == 0. Allocating new `focus'.";
          else
***************
*** 5942,5946 ****
  #endif /* |DEBUG_COMPILE|  */@; 
  
!   if (entry->object == 0)
      entry->object = static_cast<void*>(create_new<Focus>(0));
  
--- 5942,5946 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
!   if (entry->object == static_cast<void*>(0))
      entry->object = static_cast<void*>(create_new<Focus>(0));
  
***************
*** 6143,6147 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == 0 || entry->object == 0)
        {
  
--- 6143,6147 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 6659,6663 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (vector_entry != 0)
        {
  
--- 6659,6663 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (vector_entry != static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 6723,6727 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry != 0)
        {
  
--- 6723,6727 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry != static_cast<Id_Map_Entry_Node>(0))
        {
  
***************
*** 6856,6860 ****
  @<Define |Scan_Parse| template functions@>=
  
!       if (array_entry == 0)
          {
            cerr_strm << thread_name 
--- 6856,6860 ----
  @<Define |Scan_Parse| template functions@>=
  
!       if (array_entry == static_cast<Id_Map_Entry_Node>(0))
          {
            cerr_strm << thread_name 
***************
*** 6948,6952 ****
  @<Define |Scan_Parse| template functions@>=
  
!       if (vector_entry == 0)
          {
  
--- 6948,6952 ----
  @<Define |Scan_Parse| template functions@>=
  
!       if (vector_entry == static_cast<Id_Map_Entry_Node>(0))
          {
  
***************
*** 7405,7409 ****
  
  
!   if (pv == 0)
      {     
         try 
--- 7405,7409 ----
  
  
!   if (pv == static_cast<PV*>(0))
      {     
         try 
***************
*** 7500,7504 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry == 0)
       {
  
--- 7500,7504 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry == static_cast<Id_Map_Entry_Node>(0))
       {
  
***************
*** 7558,7562 ****
  @<Define |Scan_Parse| template functions@>=
  
!        if (c_entry == 0)
           {
             cerr_strm << thread_name 
--- 7558,7562 ----
  @<Define |Scan_Parse| template functions@>=
  
!        if (c_entry == static_cast<Id_Map_Entry_Node>(0))
           {
             cerr_strm << thread_name 
***************
*** 7791,7795 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (entry == 0)
        {
           cerr_strm << thread_name 
--- 7791,7795 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name 
***************
*** 7818,7822 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (object_vector == 0)
        {
           cerr_strm << thread_name 
--- 7818,7822 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (object_vector == static_cast<const Pointer_Vector<D>*>(0))
        {
           cerr_strm << thread_name 
***************
*** 7856,7860 ****
    PV*  pv = static_cast<PV*>(entry->object);
  
!   if (pv != 0)
       {
           delete pv;
--- 7856,7860 ----
    PV*  pv = static_cast<PV*>(entry->object);
  
!   if (pv != static_cast<PV*>(0))
       {
           delete pv;
***************
*** 7870,7874 ****
  
  
!   if (pv == 0)
      {     
         try 
--- 7870,7874 ----
  
  
!   if (pv == static_cast<PV*>(0))
      {     
         try 
***************
*** 7967,7971 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry == 0)
       {
  
--- 7967,7971 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (array_entry == static_cast<Id_Map_Entry_Node>(0))
       {
  
***************
*** 8025,8029 ****
  @<Define |Scan_Parse| template functions@>=
  
!        if (c_entry == 0)
           {
             cerr_strm << thread_name 
--- 8025,8029 ----
  @<Define |Scan_Parse| template functions@>=
  
!        if (c_entry == static_cast<Id_Map_Entry_Node>(0))
           {
             cerr_strm << thread_name 
***************
*** 8173,8177 ****
  @q ***** (5)@> 
  
!      if (v == 0)
       {
           cerr_strm << thread_name 
--- 8173,8177 ----
  @q ***** (5)@> 
  
!      if (v == static_cast<void*>(0))
       {
           cerr_strm << thread_name 
***************
*** 8197,8201 ****
       Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(v);
  
!      if (entry->object == 0)
       {
           cerr_strm << thread_name 
--- 8197,8201 ----
       Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(v);
  
!      if (entry->object == static_cast<void*>(0))
       {
           cerr_strm << thread_name 
***************
*** 8367,8371 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (v == 0)
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::rectify_func':"
--- 8367,8371 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (v == static_cast<void*>(0))
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::rectify_func':"
***************
*** 8397,8401 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (entry->object == 0)
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::rectify_func':"
--- 8397,8401 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (entry->object == static_cast<void*>(0))
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::rectify_func':"
***************
*** 8625,8629 ****
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(v);
  
!     if (entry == 0 || entry->object == 0)
         return 1;
  
--- 8625,8629 ----
      Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(v);
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
         return 1;
  
***************
*** 8887,8891 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (object == 0)
       {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::reflect_in_func()': "
--- 8887,8891 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (object == static_cast<C*>(0))
       {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::reflect_in_func()': "
***************
*** 8938,8942 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (plane_path == 0)
       {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::reflect_in_func()': "
--- 8938,8942 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (plane_path == static_cast<Path*>(0))
       {
        cerr_strm << thread_name << "ERROR! In `Scan_Parse::reflect_in_func()': "
***************
*** 9120,9124 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (reflection == 0)
       {
  
--- 9120,9124 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (reflection == static_cast<C*>(0))
       {
  
***************
*** 9346,9350 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (object == 0)
       {
        cerr_strm << thread_name 
--- 9346,9350 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (object == static_cast<C*>(0))
       {
        cerr_strm << thread_name 
***************
*** 9402,9406 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (pv == 0)
       {
        cerr_strm << thread_name 
--- 9402,9406 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (pv == static_cast<Pointer_Vector<C>*>(0))
       {
        cerr_strm << thread_name 
***************
*** 9441,9445 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (plane_path == 0)
       {
        cerr_strm << thread_name 
--- 9441,9445 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (plane_path == static_cast<Path*>(0))
       {
        cerr_strm << thread_name 
***************
*** 9480,9484 ****
  @<Define |Scan_Parse| template functions@>= 
  
!   if (direction == 0)
       {
           cerr_strm << thread_name 
--- 9480,9484 ----
  @<Define |Scan_Parse| template functions@>= 
  
!   if (direction == static_cast<Point*>(0))
       {
           cerr_strm << thread_name 
***************
*** 9636,9640 ****
  
  
!         if (pv == 0)
             cerr_strm << "`pv' == 0." << endl;
          else 
--- 9636,9640 ----
  
  
!         if (pv == static_cast<Pointer_Vector<C>*>(0))
             cerr_strm << "`pv' == 0." << endl;
          else 
***************
*** 9645,9649 ****
          cerr_strm.str("");
  
!         if (pv != 0)
             pv->show("pv in `Scan_Parse::reflect_off_func()':");
  
--- 9645,9649 ----
          cerr_strm.str("");
  
!         if (pv != static_cast<Pointer_Vector<C>*>(0))
             pv->show("pv in `Scan_Parse::reflect_off_func()':");
  
***************
*** 9757,9761 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (expression == 0)
       {
          cerr_strm << thread_name << "ERROR! In `Scan_Parse::pickup_command<C>()':"
--- 9757,9761 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (expression == static_cast<C*>(0))
       {
          cerr_strm << thread_name << "ERROR! In `Scan_Parse::pickup_command<C>()':"
***************
*** 9793,9797 ****
  
  @<Define |Scan_Parse| template functions@>=
!          if (q == 0)
              {
                 try 
--- 9793,9797 ----
  
  @<Define |Scan_Parse| template functions@>=
!          if (q == static_cast<C*>(0))
              {
                 try 
***************
*** 9911,9915 ****
  @<Define |Scan_Parse| template functions@>=
  
!    if (*pointer == 0)
        {
  
--- 9911,9915 ----
  @<Define |Scan_Parse| template functions@>=
  
!    if (*pointer == static_cast<C*>(0))
        {
  
***************
*** 10441,10445 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (c == 0)
      {
          
--- 10441,10445 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (c == static_cast<Conic_Section_Lattice*>(0))
      {
          
***************
*** 10682,10686 ****
  @<Define |Scan_Parse| template functions@>=
  
!   if (c == 0)
      {
  
--- 10682,10686 ----
  @<Define |Scan_Parse| template functions@>=
  
!   if (c == static_cast<C*>(0))
      {
  
***************
*** 11017,11021 ****
  Scan_Parse::standardize_func(C* c, void* v)
  {
!    if (c == 0)
        return 0;
  
--- 11017,11021 ----
  Scan_Parse::standardize_func(C* c, void* v)
  {
!    if (c == static_cast<C*>(0))
        return 0;
  
***************
*** 11481,11485 ****
  @<Define |Scan_Parse| template functions@>=
  
!     if (conic_section_lattice == 0 || c == 0)
      {
          delete conic_section_lattice;
--- 11481,11486 ----
  @<Define |Scan_Parse| template functions@>=
  
!     if (   conic_section_lattice == static_cast<Conic_Section_Lattice*>(0) 
!         || c == static_cast<C*>(0))
      {
          delete conic_section_lattice;
***************
*** 11675,11679 ****
  Scan_Parse::plane_cast_func(C* c, void* parameter) 
  {
!     if (c == 0)
         return 0;
      else if (!c->is_planar())
--- 11676,11680 ----
  Scan_Parse::plane_cast_func(C* c, void* parameter) 
  {
!     if (c == static_cast<C*>(0))
         return 0;
      else if (!c->is_planar())
***************
*** 11744,11748 ****
  Scan_Parse::plane_assignment_func(void* entry, C* c, void* parameter)
  {
!    if (c == 0)
        return 0;
  
--- 11745,11749 ----
  Scan_Parse::plane_assignment_func(void* entry, C* c, void* parameter)
  {
!    if (c == static_cast<C*>(0))
        return 0;
  
***************
*** 12322,12326 ****
  {
  
!    if (c == 0)
        return 0;
  
--- 12323,12327 ----
  {
  
!    if (c == static_cast<C*>(0))
        return 0;
  
***************
*** 12372,12376 ****
  Scan_Parse::out_cuboid_func(C* c, void* parameter)
  {
!    if (c == 0)
        return 0;
  
--- 12373,12377 ----
  Scan_Parse::out_cuboid_func(C* c, void* parameter)
  {
!    if (c == static_cast<C*>(0))
        return 0;
  
diff -rc2P 3DLDF-2.0.2/src/scanprsf.web 3DLDF-2.0.3/src/scanprsf.web
*** 3DLDF-2.0.2/src/scanprsf.web	Thu Nov  7 13:40:08 2013
--- 3DLDF-2.0.3/src/scanprsf.web	Fri Dec 13 15:38:06 2013
***************
*** 193,197 ****
    Thread_Info_Type* thread_info;
  
!   if (scanner_node == 0 /* Assume we're using threads.  */
  
        || (scanner_node->get_run_state()->multithread_input 
--- 193,197 ----
    Thread_Info_Type* thread_info;
  
!   if (scanner_node == static_cast<Scanner_Node>(0) /* Assume we're using threads.  */
  
        || (scanner_node->get_run_state()->multithread_input 
***************
*** 250,254 ****
    if (DEBUG)
      {
!       if (entry == 0)
          {
            cerr_strm << thread_name << "In `Scan_Parse::variable_func()':"
--- 250,254 ----
    if (DEBUG)
      {
!       if (entry == static_cast<Id_Map_Entry_Node>(0))
          {
            cerr_strm << thread_name << "In `Scan_Parse::variable_func()':"
***************
*** 268,272 ****
            cerr_strm.str("");
  
!           if (entry->object == 0)
              {
                
--- 268,272 ----
            cerr_strm.str("");
  
!           if (entry->object == static_cast<void*>(0))
              {
                
***************
*** 326,334 ****
        int curr_type;
        
!       if (entry == 0)
          {
            curr_type = UNDECLARED;
          }
!       else if (entry->object == 0)
          {
            curr_type = entry->type;
--- 326,334 ----
        int curr_type;
        
!       if (entry == static_cast<Id_Map_Entry_Node>(0))
          {
            curr_type = UNDECLARED;
          }
!       else if (entry->object == static_cast<void*>(0))
          {
            curr_type = entry->type;
***************
*** 471,475 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (position == 0)
        {
            cerr_strm << thread_name << "ERROR! In `Scan_Parse::label_point_command()':"
--- 471,475 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (position == static_cast<Point*>(0))
        {
            cerr_strm << thread_name << "ERROR! In `Scan_Parse::label_point_command()':"
***************
*** 566,570 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0 || entry->object == 0)
      {
        cerr_strm << thread_name 
--- 566,570 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 1051,1055 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (ppath == 0)
        {
            cerr_strm << thread_name << "ERROR! In `Scan_Parse::label_point_command()':"
--- 1051,1055 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (ppath == static_cast<Path*>(0))
        {
            cerr_strm << thread_name << "ERROR! In `Scan_Parse::label_point_command()':"
***************
*** 1118,1122 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0 || entry->object == 0)
      {
        cerr_strm << thread_name 
--- 1118,1122 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 1566,1570 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (ppath == 0)
        {
  
--- 1566,1570 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (ppath == static_cast<Path*>(0))
        {
  
***************
*** 1645,1649 ****
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == 0)
    {
  
--- 1645,1649 ----
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == static_cast<void*>(0))
    {
  
***************
*** 1672,1676 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == 0 || entry->object == 0)
        {
  
--- 1672,1676 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 1781,1786 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (ddraw_color_vector != 0)
!       scanner_node->draw_color_vector_ptr = 0;
  
     else  /* |ddraw_color_vector == 0|  */ 
--- 1781,1786 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (ddraw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
!       scanner_node->draw_color_vector_ptr = static_cast<void*>(0);
  
     else  /* |ddraw_color_vector == 0|  */ 
***************
*** 1788,1792 ****
            ddraw_color_vector = new Pointer_Vector<Color>;
  
!          if (ddraw_color != 0)
              {
  
--- 1788,1792 ----
            ddraw_color_vector = new Pointer_Vector<Color>;
  
!          if (ddraw_color != static_cast<Color*>(0))
              {
  
***************
*** 1795,1799 ****
  
  
!          else if (ccolor != 0)
              {
                  ddraw_color_vector->append_copy(ccolor);
--- 1795,1799 ----
  
  
!          else if (ccolor != static_cast<Color*>(0))
              {
                  ddraw_color_vector->append_copy(ccolor);
***************
*** 1801,1805 ****
  
  
!          else if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
              {
                  ddraw_color_vector->append_copy(*ccolor_vector);
--- 1801,1806 ----
  
  
!          else if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                   && ccolor_vector->ctr > 0)
              {
                  ddraw_color_vector->append_copy(*ccolor_vector);
***************
*** 1812,1816 ****
                   entry = scanner_node->lookup("default_color");
  
!                  if (entry != 0 && entry->object != 0)
                      ddraw_color_vector->append_copy(
                         static_cast<Color*>(entry->object));
--- 1813,1818 ----
                   entry = scanner_node->lookup("default_color");
  
!                  if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                      && entry->object != static_cast<void*>(0))
                      ddraw_color_vector->append_copy(
                         static_cast<Color*>(entry->object));
***************
*** 1829,1833 ****
  @<Define |Scan_Parse| functions@>=
   
!      if (ffill_color != 0)
          scanner_node->fill_color_ptr = 0;
  
--- 1831,1835 ----
  @<Define |Scan_Parse| functions@>=
   
!      if (ffill_color != static_cast<Color*>(0))
          scanner_node->fill_color_ptr = 0;
  
***************
*** 1840,1844 ****
  @q ******* (7) @> 
  
!             if (ffill_color_vector != 0 && ffill_color_vector->ctr > 0)
                 {
  
--- 1842,1847 ----
  @q ******* (7) @> 
  
!             if (   ffill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                 && ffill_color_vector->ctr > 0)
                 {
  
***************
*** 1850,1854 ****
  @q ******* (7) @> 
  
!             else if (ccolor != 0)
                 {
                    *ffill_color = *ccolor;
--- 1853,1857 ----
  @q ******* (7) @> 
  
!             else if (ccolor != static_cast<Color*>(0))
                 {
                    *ffill_color = *ccolor;
***************
*** 1858,1862 ****
  
  
!             else if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
                 {
  
--- 1861,1866 ----
  
  
!             else if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0)
!                      && ccolor_vector->ctr > 0)
                 {
  
***************
*** 1872,1876 ****
                     entry = scanner_node->lookup("default_color");
  
!                    if (entry != 0 && entry->object != 0)
                        *ffill_color = *(static_cast<Color*>(entry->object));
                     else                     
--- 1876,1881 ----
                     entry = scanner_node->lookup("default_color");
  
!                    if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                        && entry->object != static_cast<void*>(0))
                        *ffill_color = *(static_cast<Color*>(entry->object));
                     else                     
***************
*** 1886,1890 ****
                entry = scanner_node->lookup("background_color");
  
!               if (entry != 0 && entry->object != 0)
                   *ffill_color = *(static_cast<Color*>(entry->object));
                else                     
--- 1891,1896 ----
                entry = scanner_node->lookup("background_color");
  
!               if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                   && entry->object != static_cast<void*>(0))
                   *ffill_color = *(static_cast<Color*>(entry->object));
                else                     
***************
*** 1913,1917 ****
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != 0)
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
--- 1919,1923 ----
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != static_cast<void*>(0))
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
***************
*** 1933,1942 ****
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == 0)
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != 0)
                     {
                         ppen = *(scanner_node->current_pen);
--- 1939,1948 ----
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == static_cast<void*>(0))
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != static_cast<Pen*>(0))
                     {
                         ppen = *(scanner_node->current_pen);
***************
*** 1960,1964 ****
  @q ******* (7) @> 
  
!          if (ppen != 0)
              {
                  ppen_vector = new Pointer_Vector<Pen>;
--- 1966,1970 ----
  @q ******* (7) @> 
  
!          if (ppen != static_cast<Pen*>(0))
              {
                  ppen_vector = new Pointer_Vector<Pen>;
***************
*** 1985,1989 ****
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != 0)
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
--- 1991,1995 ----
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != static_cast<void*>(0))
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
***************
*** 1997,2001 ****
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == 0)
              {
  
--- 2003,2007 ----
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == static_cast<void*>(0))
              {
  
***************
*** 2003,2007 ****
  
  
!                 if (*(scanner_node->current_dash_pattern) != 0)
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
--- 2009,2013 ----
  
  
!                 if (*(scanner_node->current_dash_pattern) != static_cast<Dash_Pattern*>(0))
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
***************
*** 2026,2030 ****
  @q ******* (7) @> 
  
!         if (ddash_pattern != 0)
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 2032,2036 ----
  @q ******* (7) @> 
  
!         if (ddash_pattern != static_cast<Dash_Pattern*>(0))
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 2423,2427 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (ssolid == 0)
       {
           cerr_strm << thread_name 
--- 2429,2433 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (ssolid == static_cast<Solid*>(0))
       {
           cerr_strm << thread_name 
***************
*** 2476,2480 ****
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == 0)
    {
  
--- 2482,2486 ----
  
  @<Define |Scan_Parse| functions@>=
!   if (scanner_node->picture_entry_ptr == static_cast<void*>(0))
    {
  
***************
*** 2503,2507 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == 0 || entry->object == 0)
        {
  
--- 2509,2513 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 2583,2587 ****
  @<Define |Scan_Parse| functions@>=
  
! if (scanner_node->color_vector_ptr == 0)
    {
  
--- 2589,2593 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (scanner_node->color_vector_ptr == static_cast<void*>(0))
    {
  
***************
*** 2614,2618 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_ptr != 0)
        {
  
--- 2620,2624 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_ptr != static_cast<void*>(0))
        {
  
***************
*** 2728,2732 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_vector_ptr == 0)
        {
  
--- 2734,2738 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_vector_ptr == static_cast<void*>(0))
        {
  
***************
*** 2760,2764 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_ptr != 0)
        {
  
--- 2766,2770 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_ptr != static_cast<void*>(0))
        {
  
***************
*** 2893,2897 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_vector_ptr == 0)
        {
  
--- 2899,2903 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_vector_ptr == static_cast<void*>(0))
        {
  
***************
*** 2926,2930 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_ptr != 0)
        {
  
--- 2932,2936 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_ptr != static_cast<void*>(0))
        {
  
***************
*** 3028,3032 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (ddraw_color_vector_ptr == 0 && ccolor_vector_ptr != 0)
      {
  
--- 3034,3039 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (   ddraw_color_vector_ptr == static_cast<void*>(0) 
!       && ccolor_vector_ptr != static_cast<void*>(0))
      {
  
***************
*** 3071,3075 ****
      } /* |if (ddraw_color_vector_ptr == 0 && ccolor_vector_ptr != 0)|  */
  
!   if (ffill_color_vector_ptr == 0 && ccolor_vector_ptr != 0)
      {
        ffill_color_vector_ptr = ccolor_vector_ptr;
--- 3078,3083 ----
      } /* |if (ddraw_color_vector_ptr == 0 && ccolor_vector_ptr != 0)|  */
  
!   if (   ffill_color_vector_ptr == static_cast<void*>(0) 
!       && ccolor_vector_ptr != static_cast<void*>(0))
      {
        ffill_color_vector_ptr = ccolor_vector_ptr;
***************
*** 3099,3103 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (   ddraw_color_vector_ptr == 0 
        && (   basic_drawing_command == DRAW
            || basic_drawing_command == FILLDRAW
--- 3107,3111 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (   ddraw_color_vector_ptr == static_cast<void*>(0) 
        && (   basic_drawing_command == DRAW
            || basic_drawing_command == FILLDRAW
***************
*** 3134,3138 ****
  
  
!   if (entry == 0)
      {
  
--- 3142,3146 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 3242,3246 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (   ffill_color_vector_ptr == 0 
        && basic_drawing_command == FILL)
  
--- 3250,3254 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (   ffill_color_vector_ptr == static_cast<void*>(0) 
        && basic_drawing_command == FILL)
  
***************
*** 3275,3279 ****
  
  
!   if (entry == 0)
      {
  
--- 3283,3287 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 3352,3356 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (   ffill_color_vector_ptr == 0 
        && basic_drawing_command == FILLDRAW)
  
--- 3360,3364 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (   ffill_color_vector_ptr == static_cast<void*>(0)
        && basic_drawing_command == FILLDRAW)
  
***************
*** 3385,3389 ****
  
  
!   if (entry == 0)
      {
  
--- 3393,3397 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 3466,3470 ****
  
  @<Define |Scan_Parse| functions@>=
!   if (scanner_node->pen_ptr == 0)
      {
  #if DEBUG_COMPILE
--- 3474,3478 ----
  
  @<Define |Scan_Parse| functions@>=
!   if (scanner_node->pen_ptr == static_cast<void*>(0))
      {
  #if DEBUG_COMPILE
***************
*** 3483,3487 ****
      
  
!      if (*(scanner_node->current_pen) != 0)
          {
              ppen = *(scanner_node->current_pen);
--- 3491,3495 ----
      
  
!      if (*(scanner_node->current_pen) != static_cast<Pen*>(0))
          {
              ppen = *(scanner_node->current_pen);
***************
*** 3529,3538 ****
  \initials{LDF 2004.11.13.}
  Now setting |ddash_pattern = *(scanner_node->current_dash_pattern)|, if 
! |   scanner_node->dash_pattern_ptr == 0 
!  && *(scanner_node->current_dash_pattern) != 0|. 
  \ENDLOG 
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->dash_pattern_ptr == 0)
    {
  #if DEBUG_COMPILE
--- 3537,3545 ----
  \initials{LDF 2004.11.13.}
  Now setting |ddash_pattern = *(scanner_node->current_dash_pattern)|, if 
! |scanner_node->dash_pattern_ptr == 0 && *(scanner_node->current_dash_pattern) != 0|. 
  \ENDLOG 
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->dash_pattern_ptr == static_cast<void*>(0))
    {
  #if DEBUG_COMPILE
***************
*** 3550,3554 ****
  #endif /* |DEBUG_COMPILE|  */@;  
      
!        if (*(scanner_node->current_dash_pattern) != 0)
           {
               ddash_pattern = *(scanner_node->current_dash_pattern);
--- 3557,3561 ----
  #endif /* |DEBUG_COMPILE|  */@;  
      
!        if (*(scanner_node->current_dash_pattern) != static_cast<Dash_Pattern*>(0))
           {
               ddash_pattern = *(scanner_node->current_dash_pattern);
***************
*** 3883,3887 ****
  
  #if DEBUG_COMPILE
!   bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 3890,3894 ----
  
  #if DEBUG_COMPILE
!   bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 3918,3922 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (sd == 0)
        {
  
--- 3925,3929 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (sd == static_cast<Sphere_Development*>(0))
        {
  
***************
*** 3980,3984 ****
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == 0)
    {
  
--- 3987,3991 ----
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == static_cast<void*>(0))
    {
  
***************
*** 4007,4011 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == 0 || entry->object == 0)
        {
  
--- 4014,4018 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 4099,4104 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (ddraw_color_vector != 0)
!       scanner_node->draw_color_vector_ptr = 0;
  
     else  /* |ddraw_color_vector == 0|  */ 
--- 4106,4111 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (ddraw_color_vector != static_cast<Pointer_Vector<Color>*>(0))
!       scanner_node->draw_color_vector_ptr = static_cast<void*>(0);
  
     else  /* |ddraw_color_vector == 0|  */ 
***************
*** 4106,4110 ****
            ddraw_color_vector = new Pointer_Vector<Color>;
  
!          if (ddraw_color != 0)
              {
  
--- 4113,4117 ----
            ddraw_color_vector = new Pointer_Vector<Color>;
  
!          if (ddraw_color != static_cast<Color*>(0))
              {
  
***************
*** 4113,4117 ****
  
  
!          else if (ccolor != 0)
              {
                  ddraw_color_vector->append_copy(ccolor);
--- 4120,4124 ----
  
  
!          else if (ccolor != static_cast<Color*>(0))
              {
                  ddraw_color_vector->append_copy(ccolor);
***************
*** 4119,4123 ****
  
  
!          else if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
              {
                  ddraw_color_vector->append_copy(*ccolor_vector);
--- 4126,4131 ----
  
  
!          else if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                   && ccolor_vector->ctr > 0)
              {
                  ddraw_color_vector->append_copy(*ccolor_vector);
***************
*** 4130,4134 ****
                   entry = scanner_node->lookup("default_color");
  
!                  if (entry != 0 && entry->object != 0)
                      ddraw_color_vector->append_copy(
                         static_cast<Color*>(entry->object));
--- 4138,4143 ----
                   entry = scanner_node->lookup("default_color");
  
!                  if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                      && entry->object != static_cast<void*>(0))
                      ddraw_color_vector->append_copy(
                         static_cast<Color*>(entry->object));
***************
*** 4147,4151 ****
  @<Define |Scan_Parse| functions@>=
   
!      if (ffill_color != 0)
          scanner_node->fill_color_ptr = 0;
  
--- 4156,4160 ----
  @<Define |Scan_Parse| functions@>=
   
!      if (ffill_color != static_cast<Color*>(0))
          scanner_node->fill_color_ptr = 0;
  
***************
*** 4158,4162 ****
  @q ******* (7) @> 
  
!             if (ffill_color_vector != 0 && ffill_color_vector->ctr > 0)
                 {
  
--- 4167,4172 ----
  @q ******* (7) @> 
  
!             if (   ffill_color_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                 && ffill_color_vector->ctr > 0)
                 {
  
***************
*** 4168,4172 ****
  @q ******* (7) @> 
  
!             else if (ccolor != 0)
                 {
                    *ffill_color = *ccolor;
--- 4178,4182 ----
  @q ******* (7) @> 
  
!             else if (ccolor != static_cast<Color*>(0))
                 {
                    *ffill_color = *ccolor;
***************
*** 4176,4180 ****
  
  
!             else if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
                 {
  
--- 4186,4191 ----
  
  
!             else if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0) 
!                      && ccolor_vector->ctr > 0)
                 {
  
***************
*** 4190,4194 ****
                     entry = scanner_node->lookup("default_color");
  
!                    if (entry != 0 && entry->object != 0)
                        *ffill_color = *(static_cast<Color*>(entry->object));
                     else                     
--- 4201,4206 ----
                     entry = scanner_node->lookup("default_color");
  
!                    if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                        && entry->object != static_cast<void*>(0))
                        *ffill_color = *(static_cast<Color*>(entry->object));
                     else                     
***************
*** 4204,4208 ****
                entry = scanner_node->lookup("background_color");
  
!               if (entry != 0 && entry->object != 0)
                   *ffill_color = *(static_cast<Color*>(entry->object));
                else                     
--- 4216,4221 ----
                entry = scanner_node->lookup("background_color");
  
!               if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                   && entry->object != static_cast<void*>(0))
                   *ffill_color = *(static_cast<Color*>(entry->object));
                else                     
***************
*** 4223,4227 ****
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != 0)
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
--- 4236,4240 ----
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != static_cast<void*>(0))
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
***************
*** 4237,4246 ****
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == 0)
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != 0)
                     {
                         ppen = *(scanner_node->current_pen);
--- 4250,4259 ----
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == static_cast<void*>(0))
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != static_cast<Pen*>(0))
                     {
                         ppen = *(scanner_node->current_pen);
***************
*** 4264,4268 ****
  @q ******* (7) @> 
  
!          if (ppen != 0)
              {
                  ppen_vector = new Pointer_Vector<Pen>;
--- 4277,4281 ----
  @q ******* (7) @> 
  
!          if (ppen != static_cast<Pen*>(0))
              {
                  ppen_vector = new Pointer_Vector<Pen>;
***************
*** 4284,4288 ****
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != 0)
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
--- 4297,4301 ----
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != static_cast<void*>(0))
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
***************
*** 4296,4300 ****
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == 0)
              {
  
--- 4309,4313 ----
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == static_cast<void*>(0))
              {
  
***************
*** 4302,4306 ****
  
  
!                 if (*(scanner_node->current_dash_pattern) != 0)
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
--- 4315,4319 ----
  
  
!                 if (*(scanner_node->current_dash_pattern) != static_cast<Dash_Pattern*>(0))
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
***************
*** 4325,4329 ****
  @q ******* (7) @> 
  
!         if (ddash_pattern != 0)
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 4338,4342 ----
  @q ******* (7) @> 
  
!         if (ddash_pattern != static_cast<Dash_Pattern*>(0))
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 4739,4743 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->picture_entry_ptr == 0)
       {
  
--- 4752,4756 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->picture_entry_ptr == static_cast<void*>(0))
       {
  
***************
*** 4766,4770 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == 0 || entry->object == 0)
        {
  
--- 4779,4783 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
  
***************
*** 4847,4851 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_vector_ptr != 0)
        {
            ccolor_vector 
--- 4860,4864 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_vector_ptr != static_cast<void*>(0))
        {
            ccolor_vector 
***************
*** 4866,4870 ****
  @q ******* (7) @> 
  
!          if (scanner_node->color_ptr != 0 || *(scanner_node->current_color) != 0)
              {
  
--- 4879,4884 ----
  @q ******* (7) @> 
  
!          if (   scanner_node->color_ptr != static_cast<void*>(0) 
!              || *(scanner_node->current_color) != static_cast<Color*>(0))
              {
  
***************
*** 4911,4915 ****
  
  
!           if (scanner_node->color_ptr != 0)
               {
  
--- 4925,4929 ----
  
  
!           if (scanner_node->color_ptr != static_cast<void*>(0))
               {
  
***************
*** 4921,4925 ****
  @q ******* (7) @> 
              
!           else if (*(scanner_node->current_color) != 0)
               {
                   ccolor_vector->append_copy(*scanner_node->current_color);  
--- 4935,4939 ----
  @q ******* (7) @> 
              
!           else if (*(scanner_node->current_color) != static_cast<Color*>(0))
               {
                   ccolor_vector->append_copy(*scanner_node->current_color);  
***************
*** 4942,4946 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_vector_ptr != 0)
        {
            ddraw_color_vector 
--- 4956,4960 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->draw_color_vector_ptr != static_cast<void*>(0))
        {
            ddraw_color_vector 
***************
*** 4995,4999 ****
  @q ******* (7) @> 
  
!           if (scanner_node->draw_color_ptr != 0)
               {
  
--- 5009,5013 ----
  @q ******* (7) @> 
  
!           if (scanner_node->draw_color_ptr != static_cast<void*>(0))
               {
  
***************
*** 5027,5031 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_vector_ptr != 0)
        {
            ffill_color_vector 
--- 5041,5045 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->fill_color_vector_ptr != static_cast<void*>(0))
        {
            ffill_color_vector 
***************
*** 5080,5084 ****
  @q ******* (7) @> 
  
!           if (scanner_node->fill_color_ptr != 0)
               {
  
--- 5094,5098 ----
  @q ******* (7) @> 
  
!           if (scanner_node->fill_color_ptr != static_cast<void*>(0))
               {
  
***************
*** 5106,5110 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_ptr != 0)
        ccolor = static_cast<Color*>(scanner_node->color_ptr); 
  
--- 5120,5124 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (scanner_node->color_ptr != static_cast<void*>(0))
        ccolor = static_cast<Color*>(scanner_node->color_ptr); 
  
***************
*** 5114,5123 ****
     if (ddraw_color_vector->ctr == 0)
        {
!           if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
               {
                   delete ddraw_color_vector;
                   ddraw_color_vector = ccolor_vector;
               }
!           else if (ccolor != 0)
               {
                   ddraw_color_vector->append_copy(ccolor);
--- 5128,5138 ----
     if (ddraw_color_vector->ctr == 0)
        {
!           if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0) 
!               && ccolor_vector->ctr > 0)
               {
                   delete ddraw_color_vector;
                   ddraw_color_vector = ccolor_vector;
               }
!           else if (ccolor != static_cast<Color*>(0))
               {
                   ddraw_color_vector->append_copy(ccolor);
***************
*** 5128,5132 ****
                   entry = scanner_node->lookup("default_color");
  
!                  if (entry != 0 && entry->object != 0)
                      ddraw_color_vector->append_copy(static_cast<Color*>(entry->object));
  
--- 5143,5148 ----
                   entry = scanner_node->lookup("default_color");
  
!                  if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                      && entry->object != static_cast<void*>(0))
                      ddraw_color_vector->append_copy(static_cast<Color*>(entry->object));
  
***************
*** 5142,5150 ****
     if (ffill_color_vector->ctr == 0)
        {
!           if (ccolor_vector != 0 && ccolor_vector->ctr > 0)
               {
                   *ffill_color_vector = *ccolor_vector;
               }
!           else if (ccolor != 0)
               {
                   ffill_color_vector->append_copy(ccolor);
--- 5158,5167 ----
     if (ffill_color_vector->ctr == 0)
        {
!           if (   ccolor_vector != static_cast<Pointer_Vector<Color>*>(0) 
!               && ccolor_vector->ctr > 0)
               {
                   *ffill_color_vector = *ccolor_vector;
               }
!           else if (ccolor != static_cast<Color*>(0))
               {
                   ffill_color_vector->append_copy(ccolor);
***************
*** 5155,5159 ****
                   entry = scanner_node->lookup("background_color");
  
!                  if (entry != 0 && entry->object != 0)
                      ffill_color_vector->append_copy(static_cast<Color*>(entry->object));
  
--- 5172,5177 ----
                   entry = scanner_node->lookup("background_color");
  
!                  if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                      && entry->object != static_cast<void*>(0))
                      ffill_color_vector->append_copy(static_cast<Color*>(entry->object));
  
***************
*** 5167,5171 ****
                   entry = scanner_node->lookup("default_color");
  
!                  if (entry != 0 && entry->object != 0)
                      ffill_color_vector->append_copy(static_cast<Color*>(entry->object));
  
--- 5185,5190 ----
                   entry = scanner_node->lookup("default_color");
  
!                  if (   entry != static_cast<Id_Map_Entry_Node>(0) 
!                      && entry->object != static_cast<void*>(0))
                      ffill_color_vector->append_copy(static_cast<Color*>(entry->object));
  
***************
*** 5194,5198 ****
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != 0)
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
--- 5213,5217 ----
  @q ****** (6).@> 
  
!   if (scanner_node->pen_vector_ptr != static_cast<void*>(0))
       ppen_vector = static_cast<Pointer_Vector<Pen>*>(scanner_node->pen_vector_ptr); 
  
***************
*** 5214,5223 ****
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == 0)
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != 0)
                     {
                         ppen = *(scanner_node->current_pen);
--- 5233,5242 ----
  @<Define |Scan_Parse| functions@>=
  
!          if (scanner_node->pen_ptr == static_cast<void*>(0))
              {
  
  @q ******** (8) @> 
  
!                 if (*(scanner_node->current_pen) != static_cast<Pen*>(0))
                     {
                         ppen = *(scanner_node->current_pen);
***************
*** 5241,5245 ****
  @q ******* (7) @> 
  
!          if (ppen != 0)
              {
                  ppen_vector = new Pointer_Vector<Pen>;
--- 5260,5264 ----
  @q ******* (7) @> 
  
!          if (ppen != static_cast<Pen*>(0))
              {
                  ppen_vector = new Pointer_Vector<Pen>;
***************
*** 5266,5270 ****
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != 0)
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
--- 5285,5289 ----
  @q ****** (6).@> 
  
!    if (scanner_node->dash_pattern_vector_ptr != static_cast<void*>(0))
        ddash_pattern_vector 
           = static_cast<Pointer_Vector<Dash_Pattern>*>(
***************
*** 5278,5282 ****
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == 0)
              {
  
--- 5297,5301 ----
  @q ******* (7) @> 
  
!          if (scanner_node->dash_pattern_ptr == static_cast<void*>(0))
              {
  
***************
*** 5284,5288 ****
  
  
!                 if (*(scanner_node->current_dash_pattern) != 0)
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
--- 5303,5307 ----
  
  
!                 if (*(scanner_node->current_dash_pattern) != static_cast<Dash_Pattern*>(0))
                     {
                         ddash_pattern = *(scanner_node->current_dash_pattern);
***************
*** 5307,5311 ****
  @q ******* (7) @> 
  
!         if (ddash_pattern != 0)
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
--- 5326,5330 ----
  @q ******* (7) @> 
  
!         if (ddash_pattern != static_cast<Dash_Pattern*>(0))
             {
                ddash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
***************
*** 5742,5746 ****
--- 5761,5767 ----
   
        YYSTYPE value; 
+ #if 0 
        YYLTYPE location; 
+ #endif 
  
        int curr_catcode;
***************
*** 5756,5760 ****
--- 5777,5785 ----
          {
  
+ #if 0 
            curr_catcode = yylex(&value, &location, scanner_node); 
+ #else
+           curr_catcode = yylex(&value, scanner_node); 
+ #endif 
  
  #if DEBUG_COMPILE
***************
*** 5954,5958 ****
--- 5979,5988 ----
  #endif /* |DEBUG_COMPILE|  */@; 
  
+ #if 0 
                curr_catcode = yylex(&value, &location, scanner_node);
+ #else
+               curr_catcode = yylex(&value, scanner_node); 
+ #endif 
+ 
  
  @q ******** (8) Error handling:  |curr_catcode != COLON|.@> 
***************
*** 6229,6233 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (filename == 0 || filename->size() == 0)
      {
  
--- 6259,6263 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (filename == static_cast<string*>(0) || filename->size() == 0)
      {
  
***************
*** 6289,6293 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (new_scanner_node == 0)
      {
        cerr_strm << thread_name 
--- 6319,6323 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (new_scanner_node == static_cast<Scanner_Node>(0))
      {
        cerr_strm << thread_name 
***************
*** 6400,6404 ****
        Id_Map_Entry_Node entry = new_scanner_node->lookup("current_picture");
  
!       if (entry != 0 && entry->object != 0)
          static_cast<Picture*>(entry->object)->clear(); 
  
--- 6430,6434 ----
        Id_Map_Entry_Node entry = new_scanner_node->lookup("current_picture");
  
!       if (entry != static_cast<Id_Map_Entry_Node>(0) && entry->object != static_cast<void*>(0))
          static_cast<Picture*>(entry->object)->clear(); 
  
***************
*** 6792,6796 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (ppoint == 0)
        {
            cerr_strm << thread_name 
--- 6822,6826 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (ppoint == static_cast<Point*>(0))
        {
            cerr_strm << thread_name 
***************
*** 6827,6831 ****
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == 0)
    {
  
--- 6857,6861 ----
  
  @<Define |Scan_Parse| functions@>=
! if (scanner_node->picture_entry_ptr == static_cast<void*>(0))
    {
  
***************
*** 6853,6857 ****
  @<Define |Scan_Parse| functions@>=  
  
!     if (entry == 0 || entry->object == 0)
        {
            cerr_strm << thread_name 
--- 6883,6887 ----
  @<Define |Scan_Parse| functions@>=  
  
!     if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << thread_name 
***************
*** 6939,6943 ****
  @<Define |Scan_Parse| functions@>=  
  
! if (scanner_node->color_ptr == 0)
    {
  
--- 6969,6973 ----
  @<Define |Scan_Parse| functions@>=  
  
! if (scanner_node->color_ptr == static_cast<void*>(0))
    {
  
***************
*** 6956,6960 ****
  #endif /* |DEBUG_COMPILE|  */@;  
  
!      if (*(scanner_node->current_color) != 0)
   
          ccolor = *(scanner_node->current_color);
--- 6986,6990 ----
  #endif /* |DEBUG_COMPILE|  */@;  
  
!      if (*(scanner_node->current_color) != static_cast<Color*>(0))
   
          ccolor = *(scanner_node->current_color);
***************
*** 6997,7001 ****
  
  @<Define |Scan_Parse| functions@>=  
! if (scanner_node->draw_color_ptr == 0)
    {
  #if DEBUG_COMPILE
--- 7027,7031 ----
  
  @<Define |Scan_Parse| functions@>=  
! if (scanner_node->draw_color_ptr == static_cast<void*>(0))
    {
  #if DEBUG_COMPILE
***************
*** 7045,7049 ****
  @<Define |Scan_Parse| functions@>=  
  
!   if (ddraw_color == 0 && ccolor != 0)
      ddraw_color = ccolor;
  
--- 7075,7079 ----
  @<Define |Scan_Parse| functions@>=  
  
!   if (ddraw_color == static_cast<Color*>(0) && ccolor != static_cast<Color*>(0))
      ddraw_color = ccolor;
  
***************
*** 7065,7069 ****
  @<Define |Scan_Parse| functions@>=  
  
!    if (scanner_node->pen_ptr == 0)
        {
  #if DEBUG_COMPILE
--- 7095,7099 ----
  @<Define |Scan_Parse| functions@>=  
  
!    if (scanner_node->pen_ptr == static_cast<void*>(0))
        {
  #if DEBUG_COMPILE
***************
*** 7082,7086 ****
  @q ******* (7).@> 
            
!            if (*(scanner_node->current_pen) != 0)
                ppen = *(scanner_node->current_pen);
  
--- 7112,7116 ----
  @q ******* (7).@> 
            
!            if (*(scanner_node->current_pen) != static_cast<Pen*>(0))
                ppen = *(scanner_node->current_pen);
  
***************
*** 7219,7223 ****
    scanner_node->picture_entry_ptr = 0;
  
!   if (scanner_node->color_ptr != 0)
      {
        Color* c = static_cast<Color*>(scanner_node->color_ptr);
--- 7249,7253 ----
    scanner_node->picture_entry_ptr = 0;
  
!   if (scanner_node->color_ptr != static_cast<void*>(0))
      {
        Color* c = static_cast<Color*>(scanner_node->color_ptr);
***************
*** 7226,7230 ****
      }
  
!   if (scanner_node->draw_color_ptr != 0)
      {
        delete static_cast<Color*>(scanner_node->draw_color_ptr);
--- 7256,7260 ----
      }
  
!   if (scanner_node->draw_color_ptr != static_cast<void*>(0))
      {
        delete static_cast<Color*>(scanner_node->draw_color_ptr);
***************
*** 7233,7237 ****
  
  
!   if (scanner_node->fill_color_ptr != 0)
      {
        delete static_cast<Color*>(scanner_node->fill_color_ptr);
--- 7263,7267 ----
  
  
!   if (scanner_node->fill_color_ptr != static_cast<void*>(0))
      {
        delete static_cast<Color*>(scanner_node->fill_color_ptr);
***************
*** 7239,7243 ****
      }
  
!   if (scanner_node->pen_ptr != 0)
      {
        delete static_cast<Pen*>(scanner_node->pen_ptr);
--- 7269,7273 ----
      }
  
!   if (scanner_node->pen_ptr != static_cast<void*>(0))
      {
        delete static_cast<Pen*>(scanner_node->pen_ptr);
***************
*** 7245,7249 ****
      }
  
!   if (scanner_node->dash_pattern_ptr != 0)
      {
        delete static_cast<Dash_Pattern*>(scanner_node->dash_pattern_ptr);
--- 7275,7279 ----
      }
  
!   if (scanner_node->dash_pattern_ptr != static_cast<void*>(0))
      {
        delete static_cast<Dash_Pattern*>(scanner_node->dash_pattern_ptr);
***************
*** 7263,7267 ****
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->color_vector_ptr != 0)
      {
  
--- 7293,7297 ----
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->color_vector_ptr != static_cast<void*>(0))
      {
  
***************
*** 7281,7285 ****
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->draw_color_vector_ptr != 0)
      {
  
--- 7311,7315 ----
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->draw_color_vector_ptr != static_cast<void*>(0))
      {
  
***************
*** 7299,7303 ****
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->fill_color_vector_ptr != 0)
      {
  
--- 7329,7333 ----
  @<Reset pointers on |scanner_node|@>=
  
!   if (scanner_node->fill_color_vector_ptr != static_cast<void*>(0))
      {
  
***************
*** 7387,7391 ****
  
  
!   if (entry != 0 && entry->array_flag)
      {
  
--- 7417,7421 ----
  
  
!   if (entry != static_cast<Id_Map_Entry_Node>(0) && entry->array_flag)
      {
  
***************
*** 7426,7430 ****
      } /* |if (entry != 0 && entry->array_flag)|  */
  
!   else if (entry == 0)
      entry = scanner_node->lookup(curr_name);
  
--- 7456,7460 ----
      } /* |if (entry != 0 && entry->array_flag)|  */
  
!   else if (entry == static_cast<Id_Map_Entry_Node>(0))
      entry = scanner_node->lookup(curr_name);
  
***************
*** 7432,7436 ****
    if (DEBUG) 
      {
!       if (entry == 0)
          {
            cerr_strm << thread_name 
--- 7462,7466 ----
    if (DEBUG) 
      {
!       if (entry == static_cast<Id_Map_Entry_Node>(0))
          {
            cerr_strm << thread_name 
***************
*** 7468,7472 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
  
--- 7498,7502 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 7497,7501 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry != 0 && entry->type != curr_type)
      {
  
--- 7527,7531 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry != static_cast<Id_Map_Entry_Node>(0) && entry->type != curr_type)
      {
  
***************
*** 7596,7600 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
        cerr_strm << thread_name 
--- 7626,7630 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
        cerr_strm << thread_name 
***************
*** 7617,7621 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->object == 0)
      {
        cerr_strm << thread_name 
--- 7647,7651 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->object == static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 7858,7867 ****
       definition.  */
  
- 
- 
- 
- 
- 
- 
  @q ** (2) |rotate_around_func|.@>
  @*1 {\bf rotate\_around\_func}.
--- 7888,7891 ----
***************
*** 7961,7966 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (   p == 0 || q == 0 || *p == INVALID_POINT || *q == INVALID_POINT
!       || r == INVALID_REAL)
      {
        
--- 7985,7993 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (   p  == static_cast<Point*>(0) 
!       || q  == static_cast<Point*>(0) 
!       || *p == INVALID_POINT 
!       || *q == INVALID_POINT
!       || r  == INVALID_REAL)
      {
        
***************
*** 8094,8098 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0 || entry->object == 0)
      {
        cerr_strm << thread_name 
--- 8121,8125 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
        cerr_strm << thread_name 
***************
*** 8148,8152 ****
  @<Define |Scan_Parse| functions@>=      
    
!   if (t == 0)
      {
  
--- 8175,8179 ----
  @<Define |Scan_Parse| functions@>=      
    
!   if (t == static_cast<Transform*>(0))
      {
  
***************
*** 8721,8725 ****
--- 8748,8754 ----
  
    YYSTYPE value;
+ #if 0
    YYLTYPE location;
+ #endif 
  
    scanner_node->group_ctr++;
***************
*** 8890,8894 ****
--- 8919,8927 ----
        prev_token = curr_token;
  
+ #if 0 
        curr_token = yylex(&value, &location, scanner_node);
+ #else
+       curr_token = yylex(&value, scanner_node); 
+ #endif 
        
  
***************
*** 9316,9320 ****
--- 9349,9355 ----
  
     YYSTYPE value; 
+ #if 0 
     YYLTYPE location; 
+ #endif 
  
     int curr_catcode = NULL_VALUE;
***************
*** 9332,9347 ****
  @q ***** (5).@> 
  
           curr_catcode = yylex(&value, &location, scanner_node); 
  
  #if DEBUG_COMPILE
!    if (DEBUG)
!      {
!          cerr << "After `yylex()':  "
!               << "`scanner_node->token_string' == "                
!               << scanner_node->token_string << endl;
!      }
! #endif /* |DEBUG_COMPILE|  */@; 
!  
!  
           if (curr_catcode == COLON)
              {
--- 9367,9385 ----
  @q ***** (5).@> 
  
+ #if 0 
           curr_catcode = yylex(&value, &location, scanner_node); 
+ #else
+          curr_catcode = yylex(&value, scanner_node); 
+ #endif 
  
  #if DEBUG_COMPILE
!          if (DEBUG)
!            {
!                cerr << "After `yylex()':  "
!                     << "`scanner_node->token_string' == "                
!                     << scanner_node->token_string << endl;
!            }
! #endif /* |DEBUG_COMPILE|  */
!   
           if (curr_catcode == COLON)
              {
***************
*** 9437,9441 ****
--- 9475,9483 ----
  @q ***** (5).@> 
  
+ #if 0 
           curr_catcode = yylex(&value, &location, scanner_node); 
+ #else
+          curr_catcode = yylex(&value, scanner_node); 
+ #endif 
  
           if (curr_catcode == END_FOR && nest_ctr == 0)
***************
*** 10387,10391 ****
  
  
!    if (entry == 0)
        {
            cerr_strm << thread_name << "ERROR!  "
--- 10429,10433 ----
  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
            cerr_strm << thread_name << "ERROR!  "
***************
*** 10416,10420 ****
     Definition_Info_Node din;
  
!    if (entry->object == 0)
        {
           try
--- 10458,10462 ----
     Definition_Info_Node din;
  
!    if (entry->object == static_cast<void*>(0))
        {
           try
***************
*** 10574,10578 ****
--- 10616,10622 ----
  
     YYSTYPE value; 
+ #if 0 
     YYLTYPE location; 
+ #endif 
  
     int prev_token;
***************
*** 10597,10601 ****
--- 10641,10650 ----
           prev_token = curr_token;
  
+ #if 0 
           curr_token = yylex(&value, &location, scanner_node);
+ #else
+          curr_token = yylex(&value, scanner_node); 
+ #endif 
+ 
        
  #if DEBUG_COMPILE
***************
*** 11016,11020 ****
  
  
!    if (entry == 0)
        {
           cerr_strm << thread_name 
--- 11065,11069 ----
  
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name 
***************
*** 11320,11324 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (entry == 0 || entry->object == 0)
        {
            cerr_strm << "ERROR!  In Scan_Parse::macro_call_func()':"
--- 11369,11373 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
        {
            cerr_strm << "ERROR!  In Scan_Parse::macro_call_func()':"
***************
*** 11550,11554 ****
--- 11599,11605 ----
  
            YYSTYPE value; 
+ #if 0 
            YYLTYPE location; 
+ #endif 
  
            int prev_token;
***************
*** 11562,11567 ****
               curr_token = LEFT_BRACE;
            else
!              curr_token = yylex(&value, &location, scanner_node);
  
     
            if (curr_token == LEFT_BRACE)
--- 11613,11624 ----
               curr_token = LEFT_BRACE;
            else
!           {
  
+ #if 0 
+              curr_token = yylex(&value, &location, scanner_node);
+ #else
+              curr_token = yylex(&value, scanner_node); 
+ #endif 
+           }  /* |else|  */
     
            if (curr_token == LEFT_BRACE)
***************
*** 11597,11601 ****
--- 11654,11663 ----
                   prev_token = curr_token;
  
+ #if 0 
                   curr_token = yylex(&value, &location, scanner_node);
+ #else
+                  curr_token = yylex(&value, scanner_node); 
+ #endif 
+ 
  
                   if (curr_token == RIGHT_BRACE && brace_nest_ctr == 0)
***************
*** 12047,12051 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
  
--- 12109,12113 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 12067,12071 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->subordinate_array == 0)
      {
        
--- 12129,12133 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->subordinate_array == static_cast<Id_Map_Entry_Node>(0))
      {
        
***************
*** 12164,12168 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12226,12230 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12191,12195 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12253,12257 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12218,12222 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12280,12284 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12244,12248 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12306,12310 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12272,12276 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12334,12338 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12298,12302 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12360,12364 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12323,12327 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12385,12389 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12350,12354 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12412,12416 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12377,12381 ****
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != 0)
          {
            pv->v.clear();
--- 12439,12443 ----
        PV* pv = static_cast<PV*>(entry->object);
  
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12405,12409 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12467,12471 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12432,12436 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12494,12498 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12459,12463 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12521,12525 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12495,12499 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12557,12561 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12522,12526 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12584,12588 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12549,12553 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12611,12615 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12577,12581 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12639,12643 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12604,12608 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12666,12670 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12632,12636 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12694,12698 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12658,12662 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12720,12724 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12687,12691 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12749,12753 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12713,12717 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12775,12779 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12741,12745 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12803,12807 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12767,12771 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12829,12833 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12795,12799 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12857,12861 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12821,12825 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12883,12887 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12850,12854 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12912,12916 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12877,12881 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
            pv->v.clear();
--- 12939,12943 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
            pv->v.clear();
***************
*** 12981,12985 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == 0)
      {
  
--- 13043,13047 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 13001,13005 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->subordinate_array == 0)
      {
        
--- 13063,13067 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (entry->subordinate_array == static_cast<Id_Map_Entry_Node>(0))
      {
        
***************
*** 13227,13231 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13289,13293 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13248,13252 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13310,13314 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13268,13272 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13330,13334 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13289,13293 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13351,13355 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13315,13319 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13377,13381 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13340,13344 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13402,13406 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13366,13370 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13428,13432 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13392,13396 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13454,13458 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13418,13422 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13480,13484 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13444,13448 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13506,13510 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13473,13477 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13535,13539 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13501,13505 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13563,13567 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13527,13531 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13589,13593 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13553,13557 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13615,13619 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13578,13582 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13640,13644 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13604,13608 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13666,13670 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13631,13635 ****
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != 0)
          {
              @<Common code for popping objects@>@;
--- 13693,13697 ----
        PV* pv = static_cast<PV*>(entry->object);
        
!       if (pv != static_cast<PV*>(0))
          {
              @<Common code for popping objects@>@;
***************
*** 13692,13696 ****
  @<Common code for popping objects@>=
  
!    if (pv != 0)
        {
  
--- 13754,13758 ----
  @<Common code for popping objects@>=
  
!    if (pv != static_cast<PV*>(0))
        {
  
***************
*** 13702,13706 ****
            root = scanner_node->lookup(root_strm.str());
  
!           if (root == 0)
               {
                   cerr_strm << thread_name 
--- 13764,13768 ----
            root = scanner_node->lookup(root_strm.str());
  
!           if (root == static_cast<Id_Map_Entry_Node>(0))
               {
                   cerr_strm << thread_name 
***************
*** 13726,13730 ****
                                               false);
  
!           if (temp_entry == 0)
               {
                   cerr_strm << thread_name 
--- 13788,13792 ----
                                               false);
  
!           if (temp_entry == static_cast<Id_Map_Entry_Node>(0))
               {
                   cerr_strm << thread_name 
***************
*** 13743,13747 ****
                   return 1;   
  
!              }  /* |if (temp_entry == 0)|  */
  
  
--- 13805,13809 ----
                   return 1;   
  
!              }  /* |if (temp_entry == static_cast<Id_Map_Entry_Node>(0))|  */
  
  
***************
*** 13752,13756 ****
            --pv->ctr;
        
!       }  /* |if (pv != 0)|  */
  
  @q ** (2) |let_func|.@>
--- 13814,13818 ----
            --pv->ctr;
        
!       }  /* |if (pv != static_cast<PV*>(0))|  */
  
  @q ** (2) |let_func|.@>
***************
*** 13820,13824 ****
--- 13882,13888 ----
  
     YYSTYPE value; 
+ #if 0 
     YYLTYPE location; 
+ #endif 
  
     int curr_catcode;
***************
*** 13829,13833 ****
--- 13893,13901 ----
        {
  
+ #if 0 
            curr_catcode = yylex(&value, &location, scanner_node); 
+ #else
+           curr_catcode = yylex(&value, scanner_node); 
+ #endif 
           
            if (curr_catcode == SEMI_COLON)
***************
*** 13866,13870 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_1 == 0)
        {
           cerr_strm << thread_name << "ERROR!  In `Scan_Parse::let_func()':"
--- 13934,13938 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_1 == static_cast<Id_Map_Entry_Node>(0))
        {
           cerr_strm << thread_name << "ERROR!  In `Scan_Parse::let_func()':"
***************
*** 13897,13901 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_0 != 0)
        {
  #if DEBUG_COMPILE
--- 13965,13969 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (entry_0 != static_cast<Id_Map_Entry_Node>(0))
        {
  #if DEBUG_COMPILE
***************
*** 14081,14085 ****
  @<Define |Scan_Parse| functions@>=
  
!      if (p == 0 || q == 0)
       {
       
--- 14149,14153 ----
  @<Define |Scan_Parse| functions@>=
  
!      if (p == static_cast<Point*>(0) || q == static_cast<Path*>(0))
       {
       
***************
*** 14191,14195 ****
  @<Define |Scan_Parse| functions@>=
  
!           if (r == 0 || p0 == 0 || p1 == 0)
               {
                   cerr_strm << thread_name 
--- 14259,14265 ----
  @<Define |Scan_Parse| functions@>=
  
!           if (   r == static_cast<Polygon*>(0) 
!               || p0 == static_cast<Point*>(0) 
!               || p1 == static_cast<Point*>(0))
               {
                   cerr_strm << thread_name 
***************
*** 14278,14282 ****
  @q ****** (6).@> 
  
!           if (pv == 0)
               {
                   cerr_strm << thread_name 
--- 14348,14352 ----
  @q ****** (6).@> 
  
!           if (pv == static_cast<Pointer_Vector<Polygon>*>(0))
               {
                   cerr_strm << thread_name 
***************
*** 14306,14310 ****
  @q ****** (6).@> 
  
!          else  /* |pv != 0|  */
              {
  
--- 14376,14380 ----
  @q ****** (6).@> 
  
!          else  /* |pv != static_cast<PV*>(0)|  */
              {
  
***************
*** 14315,14319 ****
                  return 0;
   
!             }  /* |else | (|pv != 0|)  */
  
  @q ****** (6).@> 
--- 14385,14389 ----
                  return 0;
   
!             }  /* |else | (|pv != static_cast<PV*>(0)|)  */
  
  @q ****** (6).@> 
***************
*** 14370,14374 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (r == 0 || p == 0)
     {
         cerr_strm << thread_name 
--- 14440,14444 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (r == static_cast<Polygon*>(0) || p == static_cast<Path*>(0))
     {
         cerr_strm << thread_name 
***************
*** 14602,14606 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (p == 0)
        {
            cerr_strm << thread_name
--- 14672,14676 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (p == static_cast<Path*>(0))
        {
            cerr_strm << thread_name
***************
*** 15175,15179 ****
  
  
!   if (entry == 0)
      {
  
--- 15245,15249 ----
  
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0))
      {
  
***************
*** 15522,15526 ****
  @q **** (4) @>   
  
!    if (str == 0)
        {
            cerr_strm << thread_name << "WARNING!  "
--- 15592,15596 ----
  @q **** (4) @>   
  
!    if (str == static_cast<string*>(0))
        {
            cerr_strm << thread_name << "WARNING!  "
***************
*** 15614,15623 ****
  @<Define |Scan_Parse| functions@>=
     
!    if (p == 0)
        {
  
          cerr_strm << thread_name << "ERROR! In `Scan_Parse::is_cycle_func()':"
                    << endl 
!                   << "`path* p' is null."
                    << endl 
                    << "Returning `bool* b' (cast to `void*') with `*b == 0'.";
--- 15684,15693 ----
  @<Define |Scan_Parse| functions@>=
     
!    if (p == static_cast<Path*>(0))
        {
  
          cerr_strm << thread_name << "ERROR! In `Scan_Parse::is_cycle_func()':"
                    << endl 
!                   << "`Path* p' is null."
                    << endl 
                    << "Returning `bool* b' (cast to `void*') with `*b == 0'.";
***************
*** 15899,15903 ****
  @<Define |Scan_Parse| functions@>=
  
!   if (!p || !q)
    {
        cerr_strm << "ERROR!  In `Scan_Parse::plane_intersection_func:'"
--- 15969,15973 ----
  @<Define |Scan_Parse| functions@>=
  
!   if (p == static_cast<Plane*>(0) || q == static_cast<Plane*>(0))
    {
        cerr_strm << "ERROR!  In `Scan_Parse::plane_intersection_func:'"
***************
*** 16165,16169 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (v == 0)
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::get_hyperbola_branch_func':"
--- 16235,16239 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (v == static_cast<void*>(0))
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::get_hyperbola_branch_func':"
***************
*** 16220,16224 ****
  @<Define |Scan_Parse| functions@>=
  
!    if (p == 0)
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::get_hyperbola_branch_func':"
--- 16290,16294 ----
  @<Define |Scan_Parse| functions@>=
  
!    if (p == static_cast<Path*>(0))
     {
         cerr_strm << thread_name << "ERROR!  In `Scan_Parse::get_hyperbola_branch_func':"
***************
*** 16414,16418 ****
  @<Define |Scan_Parse| functions@>=
  
!     if (c == 0)
      {
          cerr_strm << thread_name << "ERROR!  "
--- 16484,16488 ----
  @<Define |Scan_Parse| functions@>=
  
!     if (c == static_cast<void*>(0))
      {
          cerr_strm << thread_name << "ERROR!  "
***************
*** 16459,16463 ****
  @<Define |Scan_Parse| functions@>=
   
!    if (pv == 0)
     {
         cerr_strm << thread_name << "ERROR!  "
--- 16529,16533 ----
  @<Define |Scan_Parse| functions@>=
   
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
     {
         cerr_strm << thread_name << "ERROR!  "
***************
*** 17254,17258 ****
      Point* p = 0;
  
!     if (increment != 0)
      {
          p = get_point(scanner_node, 
--- 17324,17328 ----
      Point* p = 0;
  
!     if (increment != ZERO_REAL)
      {
          p = get_point(scanner_node, 
***************
*** 17275,17279 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (p != 0)
      {
         q = create_new<Path>(0);
--- 17345,17349 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (p != static_cast<Point*>(0))
      {
         q = create_new<Path>(0);
***************
*** 17291,17295 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (p != 0)
      {
  
--- 17361,17365 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (p != static_cast<Point*>(0))
      {
  
***************
*** 17662,17666 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (increment != 0)
      {
  
--- 17732,17736 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (increment != ZERO_REAL)
      {
  
***************
*** 17860,17864 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!    if (pv == 0)
     {
  
--- 17930,17934 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!    if (pv == static_cast<Pointer_Vector<Point>*>(0))
     {
  
***************
*** 17965,17969 ****
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (increment != 0)
      {
          p = create_new<Point>(pv->v[2]);
--- 18035,18039 ----
  @<Define |Conic_Section_Lattice| functions@>=
  
!     if (increment != ZERO_REAL)
      {
          p = create_new<Point>(pv->v[2]);
diff -rc2P 3DLDF-2.0.2/src/sctpcrt.web 3DLDF-2.0.3/src/sctpcrt.web
*** 3DLDF-2.0.2/src/sctpcrt.web	Thu Nov  7 13:40:08 2013
--- 3DLDF-2.0.3/src/sctpcrt.web	Fri Dec 13 15:40:52 2013
***************
*** 288,292 ****
  #if DEBUG_COMPILE
      if (DEBUG)
!       cerr << "in_filename == " << in_filename << endl << flush;
  #endif
  
--- 288,292 ----
  #if DEBUG_COMPILE
      if (DEBUG)
!       cerr << "in_filename == " << in_filename << endl;
  #endif
  
***************
*** 296,300 ****
  #if DEBUG_COMPILE
        if (DEBUG) 
!         cerr << "No period." << "\n" << flush;@/@,@;
  #endif
  
--- 296,300 ----
  #if DEBUG_COMPILE
        if (DEBUG) 
!         cerr << "No period." << "\n";@/@,@;
  #endif
  
***************
*** 308,312 ****
  #if DEBUG_COMPILE
        if (DEBUG)
!         cerr << "Trying " << in_filename<< ".\n" << flush;
  #endif
        
--- 308,312 ----
  #if DEBUG_COMPILE
        if (DEBUG)
!         cerr << "Trying " << in_filename<< ".\n";
  #endif
        
***************
*** 316,320 ****
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " exists!" << endl << flush;
  #endif
          }
--- 316,320 ----
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " exists!" << endl;
  #endif
          }
***************
*** 328,332 ****
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " doesn't exist!" << endl << flush;
  #endif
            in_filename = str;
--- 328,332 ----
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " doesn't exist!" << endl;
  #endif
            in_filename = str;
***************
*** 336,341 ****
                cerr << "ERROR! In Scanner_Type::create():\n"
                     << in_filename << " doesn't exist! "
!                    << "Returning 0. Will try to continue.\n\n" 
!                    << flush;
  
                delete in_file;
--- 336,340 ----
                cerr << "ERROR! In Scanner_Type::create():\n"
                     << in_filename << " doesn't exist! "
!                    << "Returning 0. Will try to continue.\n\n";
  
                delete in_file;
***************
*** 353,358 ****
      {
  #if DEBUG_COMPILE
! if (DEBUG) 
!   cerr << "s == " << s << endl << flush;
  #endif
  
--- 352,361 ----
      {
  #if DEBUG_COMPILE
!       if (DEBUG) 
!       {
!           cerr_mutex.lock(); 
!           cerr << "s == " << s << endl;
!           cerr_mutex.unlock(); 
!       }
  #endif
  
***************
*** 362,366 ****
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " exists!" << endl << flush;
  #endif
          }
--- 365,369 ----
  #if DEBUG_COMPILE
            if (DEBUG)
!             cerr << in_filename << " exists!" << endl;
  #endif
          }
***************
*** 369,373 ****
            cerr << "ERROR! In Scanner_Type::create():\n"
                 << in_filename << " doesn't exist! "
!                << "Returning 0. Will try to continue.\n\n" << flush;
            delete in_file;
            return 0;
--- 372,376 ----
            cerr << "ERROR! In Scanner_Type::create():\n"
                 << in_filename << " doesn't exist! "
!                << "Returning 0. Will try to continue.\n\n";
            delete in_file;
            return 0;
***************
*** 400,404 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "out_filename_base == " << out_filename_base << endl << flush;
  #endif
  
--- 403,407 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "out_filename_base == " << out_filename_base << endl;
  #endif
  
***************
*** 412,416 ****
    if (DEBUG)   
      cerr << "out_filename_base after erase == "
!          << out_filename_base << endl << flush;
  #endif
  
--- 415,419 ----
    if (DEBUG)   
      cerr << "out_filename_base after erase == "
!          << out_filename_base << endl;
  #endif
  
***************
*** 580,584 ****
    scanner_node->in->filename = in_filename;
  
!   if (in_file != 0)
      { 
          scanner_node->in->stream_ptr = static_cast<istream*>(in_file);
--- 583,587 ----
    scanner_node->in->filename = in_filename;
  
!   if (in_file != static_cast<ifstream*>(0))
      { 
          scanner_node->in->stream_ptr = static_cast<istream*>(in_file);
***************
*** 589,593 ****
  
  
!   else if (in_stream != 0)
       {
          scanner_node->in->stream_ptr = in_stream;
--- 592,596 ----
  
  
!   else if (in_stream != static_cast<istream*>(0))
       {
          scanner_node->in->stream_ptr = in_stream;
***************
*** 983,987 ****
       if (DEBUG)
         cerr << "top_level == true.  Initializing scanner_node->id_map_node." 
!             << endl << flush;
  #endif
  
--- 986,990 ----
       if (DEBUG)
         cerr << "top_level == true.  Initializing scanner_node->id_map_node." 
!             << endl;
  #endif
  
***************
*** 5588,5591 ****
--- 5591,5606 ----
      Focus a(0, 0, -10, 0, 0, 10, 20); 
  
+ 
+ #if DEBUG_COMPILE
+    if (DEBUG)
+    {
+        cerr_mutex.lock(); 
+        a.show("a:");
+        cerr_mutex.unlock(); 
+ 
+    }  /* |if (DEBUG)|  */
+ #endif  /* |DEBUG_COMPILE|  */ 
+ 
+ 
      Focus* f = create_new<Focus>(a);
  
***************
*** 6092,6096 ****
               if (DEBUG) 
                 cerr << "Entry " << i++ << ": " << iter->first
!                     << endl << flush;
             }
         }
--- 6107,6111 ----
               if (DEBUG) 
                 cerr << "Entry " << i++ << ": " << iter->first
!                     << endl;
             }
         }
***************
*** 6106,6110 ****
       if (DEBUG)
         cerr << "top_level == false.  Not initializing scanner_node->id_map_node." 
!             << endl << flush;
  #endif
   
--- 6121,6125 ----
       if (DEBUG)
         cerr << "top_level == false.  Not initializing scanner_node->id_map_node." 
!             << endl;
  #endif
   
***************
*** 6117,6121 ****
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "Exiting Scanner_Node::create()\n" << flush;
  #endif
    return scanner_node;
--- 6132,6136 ----
  #if DEBUG_COMPILE
    if (DEBUG)
!     cerr << "Exiting Scanner_Node::create()\n";
  #endif
    return scanner_node;
***************
*** 6144,6148 ****
     cerr << "In `Check in_filename' section:" << endl
          << "in_filename == " << in_filename << endl
!         << "in_filename == " << in_filename << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6159,6163 ----
     cerr << "In `Check in_filename' section:" << endl
          << "in_filename == " << in_filename << endl
!         << "in_filename == " << in_filename << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6178,6182 ****
                     << "Won't input `" << in_filename << "' twice." 
                     << endl  
!                    << "Returning 0. Will try to continue.\n\n" << flush;
  
                delete in_file;
--- 6193,6197 ----
                     << "Won't input `" << in_filename << "' twice." 
                     << endl  
!                    << "Returning 0. Will try to continue.\n\n";
  
                delete in_file;
***************
*** 6194,6198 ****
            cerr << in_filename << " not found on `in_filename_vector'." 
                 << endl << "Adding it."  
!                << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6209,6213 ----
            cerr << in_filename << " not found on `in_filename_vector'." 
                 << endl << "Adding it."  
!                << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6219,6223 ****
     cerr << "In `Check out_filename' section:" << endl
          << "in_filename == " << in_filename << endl
!         << "out_filename == " << out_filename << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6234,6238 ----
     cerr << "In `Check out_filename' section:" << endl
          << "in_filename == " << in_filename << endl
!         << "out_filename == " << out_filename << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6253,6257 ****
                     << "Won't input `" << in_filename << "' twice." 
                     << endl  
!                    << "Returning 0. Will try to continue.\n\n" << flush;
  
                delete in_file;
--- 6268,6272 ----
                     << "Won't input `" << in_filename << "' twice." 
                     << endl  
!                    << "Returning 0. Will try to continue.\n\n";
  
                delete in_file;
***************
*** 6269,6273 ****
            cerr << out_filename << " not found on `out_filename_vector'." 
                 << endl << "Adding it."  
!                << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6284,6288 ----
            cerr << out_filename << " not found on `out_filename_vector'." 
                 << endl << "Adding it."  
!                << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6288,6292 ****
         cerr << "ERROR! In `Scanner_Node::create()':\n"
           << out_filename << " doesn't exist! "
!            << "Returning 0. Will try to continue.\n\n" << flush;
         delete in_file;
         delete out_file;
--- 6303,6307 ----
         cerr << "ERROR! In `Scanner_Node::create()':\n"
           << out_filename << " doesn't exist! "
!            << "Returning 0. Will try to continue.\n\n";
         delete in_file;
         delete out_file;
***************
*** 6297,6302 ****
  #if DEBUG_COMPILE
         if (DEBUG)
!          cerr << "Succeeded in opening " << out_filename << ".\n"
!               << flush;
  #endif
       }
--- 6312,6317 ----
  #if DEBUG_COMPILE
         if (DEBUG)
!          cerr << "Succeeded in opening " << out_filename << ".\n";
! 
  #endif
       }
diff -rc2P 3DLDF-2.0.2/src/sctpfncs.web 3DLDF-2.0.3/src/sctpfncs.web
*** 3DLDF-2.0.2/src/sctpfncs.web	Thu Nov  7 13:40:08 2013
--- 3DLDF-2.0.3/src/sctpfncs.web	Fri Dec 13 13:19:38 2013
***************
*** 174,178 ****
    if (DEBUG)
      cerr << "Entering `Scanner_Type' destructor."
!          << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 174,178 ----
    if (DEBUG)
      cerr << "Entering `Scanner_Type' destructor."
!          << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 299,303 ****
        if (DEBUG) 
          cerr << "Calling `delete id_map_node'."
!              << endl << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 299,303 ----
        if (DEBUG) 
          cerr << "Calling `delete id_map_node'."
!              << endl;
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 312,316 ****
       {
         cerr << "After call to `delete id_map_node'."
!             << endl << flush;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 312,316 ----
       {
         cerr << "After call to `delete id_map_node'."
!             << endl;
       }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 324,328 ****
           cerr << "In `Scanner_Type' destructor: Calling `delete' on `up'."
                << endl << "This will cause this function to be called recursively."
!               << endl << flush; 
       }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 324,328 ----
           cerr << "In `Scanner_Type' destructor: Calling `delete' on `up'."
                << endl << "This will cause this function to be called recursively."
!               << endl; 
       }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 710,714 ****
    if (DEBUG)
      cerr << "Exiting `Scanner_Type' destructor."
!          << endl << flush; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 710,714 ----
    if (DEBUG)
      cerr << "Exiting `Scanner_Type' destructor."
!          << endl; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 1438,1442 ****
  
    if (DEBUG)
!     cerr << "Entering Scanner_Type::add_synonym()." << "\n" << flush;
  
  #endif
--- 1438,1442 ----
  
    if (DEBUG)
!     cerr << "Entering Scanner_Type::add_synonym()." << "\n";
  
  #endif
***************
*** 1452,1458 ****
             << "Entry already exists for " << synonym 
             << ".Returning 0.\n"
!            << "Type <RETURN> to continue.\n"
!            << flush;  
!      
        getchar();  /* Don't delete this!  */@;  
        
--- 1452,1457 ----
             << "Entry already exists for " << synonym 
             << ".Returning 0.\n"
!            << "Type <RETURN> to continue.\n";
! 
        getchar();  /* Don't delete this!  */@;  
        
***************
*** 1469,1475 ****
             << "can't add a synonym." << endl
             << "Returning 0.\n"
!            << "Type <RETURN> to continue.\n"
!            << flush;  
!      
        getchar();  /* Don't delete this!  */@;  
        
--- 1468,1473 ----
             << "can't add a synonym." << endl
             << "Returning 0.\n"
!            << "Type <RETURN> to continue.\n";
! 
        getchar();  /* Don't delete this!  */@;  
        
***************
*** 1505,1509 ****
      {
        cerr << "Exiting Scanner_Type::add_synonym() and returning `entry'."
!          << "\n" << flush;
      }
  #endif
--- 1503,1507 ----
      {
        cerr << "Exiting Scanner_Type::add_synonym() and returning `entry'."
!          << "\n";
      }
  #endif
***************
*** 1542,1546 ****
    if (DEBUG)
      cerr << "Entering Scanner_Type::lookup(). level == " << level
!          << ".\n" << flush;
  #endif
  
--- 1540,1544 ----
    if (DEBUG)
      cerr << "Entering Scanner_Type::lookup(). level == " << level
!          << ".\n";
  #endif
  
***************
*** 1563,1567 ****
                     << ". It's a synonym for " << *base_name << "."
                     << endl << "Calling `lookup(" << *base_name
!                    << ", ...)'." << endl << flush;  
              }
  #endif
--- 1561,1565 ----
                     << ". It's a synonym for " << *base_name << "."
                     << endl << "Calling `lookup(" << *base_name
!                    << ", ...)'." << endl;  
              }
  #endif
***************
*** 1578,1582 ****
              cerr << "In lookup(): Found " << s 
                   << ". Returning Id_Map_Entry_Node with `type' == " 
!                 << name_map[iter->second->type] << ".\n" << flush;
  #endif
  
--- 1576,1580 ----
              cerr << "In lookup(): Found " << s 
                   << ". Returning Id_Map_Entry_Node with `type' == " 
!                 << name_map[iter->second->type] << ".\n";
  #endif
  
***************
*** 1608,1612 ****
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "traverse == false.  Returning 0." << endl << flush;
  #endif
            
--- 1606,1610 ----
  #if DEBUG_COMPILE
            if (DEBUG) 
!             cerr << "traverse == false.  Returning 0." << endl;
  #endif
            
***************
*** 1625,1629 ****
            if (DEBUG) 
              cerr << "traverse == true, but local_id_map_node->up  == 0. "
!                  << "Returning 0." << endl << flush;
  #endif        
            
--- 1623,1627 ----
            if (DEBUG) 
              cerr << "traverse == true, but local_id_map_node->up  == 0. "
!                  << "Returning 0." << endl;
  #endif        
            
***************
*** 1643,1647 ****
                   << "Calling this function recursively:" << endl 
                   << "`lookup(" << s << ", true, " << level
!                  << ", local_id_map_node->up)'" << endl << flush;
  #endif        
            return lookup(s, true, level, local_id_map_node->up);
--- 1641,1645 ----
                   << "Calling this function recursively:" << endl 
                   << "`lookup(" << s << ", true, " << level
!                  << ", local_id_map_node->up)'" << endl;
  #endif        
            return lookup(s, true, level, local_id_map_node->up);
***************
*** 2236,2240 ****
  
  } /* End of |Scanner_Type::handle_numeric_list()| definition.  */
! ;
  
  @q * (0) Extract |Picture| output arguments.@>
--- 2234,2238 ----
  
  } /* End of |Scanner_Type::handle_numeric_list()| definition.  */
! 
  
  @q * (0) Extract |Picture| output arguments.@>
***************
*** 2343,2347 ****
    if (DEBUG)
      {
!       if (entry != 0)
          {
            cerr_mutex.lock();
--- 2341,2345 ----
    if (DEBUG)
      {
!       if (entry != static_cast<Id_Map_Entry_Node>(0))
          {
            cerr_mutex.lock();
***************
*** 2449,2453 ****
  @<Define |Scanner_Type| functions@>=
  
!    if (entry->object == 0)
       {
  
--- 2447,2451 ----
  @<Define |Scanner_Type| functions@>=
  
!    if (entry->object == static_cast<void*>(0))
       {
  
***************
*** 3131,3135 ****
         
  
!        if (focus_entry == 0 || focus_entry->object == 0)
           {
             
--- 3129,3133 ----
         
  
!        if (focus_entry == static_cast<Id_Map_Entry_Node>(0) || focus_entry->object == 0)
           {
             
diff -rc2P 3DLDF-2.0.2/src/setarc.w 3DLDF-2.0.3/src/setarc.w
*** 3DLDF-2.0.2/src/setarc.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/setarc.w	Fri Dec 13 15:42:52 2013
***************
*** 72,76 ****
                                     parameter);
  
!    @=$$@> = 0;
  
  };
--- 72,76 ----
                                     parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 104,108 ****
  
  
!    if (scanner_node->arc_options != 0)
        scanner_node->arc_options->clear();
  
--- 104,108 ----
  
  
!    if (scanner_node->arc_options != static_cast<Arc_Options*>(0))
        scanner_node->arc_options->clear();
  
***************
*** 110,114 ****
        scanner_node->arc_options = new Arc_Options;
  
!    @=$$@> = 0;
  
  };
--- 110,114 ----
        scanner_node->arc_options = new Arc_Options;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 130,134 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 130,134 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 167,171 ****
        delete options->focus_0;
  
!    if (@=$3@> == 0)
        options->focus_0 = static_cast<Point*>(@=$5@>); 
     else if (@=$3@> == 1)
--- 167,171 ----
        delete options->focus_0;
  
!    if (@=$3@> == ZERO_REAL)
        options->focus_0 = static_cast<Point*>(@=$5@>); 
     else if (@=$3@> == 1)
***************
*** 181,185 ****
     LDF 2007.11.25.  */ 
     
!    @=$$@> = 0;
  
  };
--- 181,185 ----
     LDF 2007.11.25.  */ 
     
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 202,206 ****
        = @=$2@>; 
  
!    @=$$@> = 0;
  
  };
--- 202,206 ----
        = @=$2@>; 
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/setmatrx.w 3DLDF-2.0.3/src/setmatrx.w
*** 3DLDF-2.0.2/src/setmatrx.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/setmatrx.w	Fri Dec 13 15:42:52 2013
***************
*** 75,79 ****
                                        parameter);
  
!    @=$$@> = 0;
  
  };
--- 75,79 ----
                                        parameter);
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 106,115 ****
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->matrix_options != 0)
        scanner_node->matrix_options->clear();
     else
        scanner_node->matrix_options = new Matrix_Options;
  
!    @=$$@> = 0;
  
  };
--- 106,115 ----
     Scanner_Node scanner_node = static_cast<Scanner_Node>(parameter);
  
!    if (scanner_node->matrix_options != static_cast<Matrix_Options*>(0))
        scanner_node->matrix_options->clear();
     else
        scanner_node->matrix_options = new Matrix_Options;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 131,135 ****
  {
  
!    @=$$@> = 0;
  
  };
--- 131,135 ----
  {
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 166,170 ****
     options->type = Matrix::MATRIX_DOUBLE_TYPE;
  
!    @=$$@> = 0;
  
  };
--- 166,170 ----
     options->type = Matrix::MATRIX_DOUBLE_TYPE;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 187,191 ****
     options->type = Matrix::MATRIX_FLOAT_TYPE;
  
!    @=$$@> = 0;
  
  };
--- 187,191 ----
     options->type = Matrix::MATRIX_FLOAT_TYPE;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
***************
*** 209,213 ****
     options->type = Matrix::MATRIX_COMPLEX_TYPE;
  
!    @=$$@> = 0;
  
  };
--- 209,213 ----
     options->type = Matrix::MATRIX_COMPLEX_TYPE;
  
!    @=$$@> = static_cast<void*>(0);
  
  };
diff -rc2P 3DLDF-2.0.2/src/solfaced.web 3DLDF-2.0.3/src/solfaced.web
*** 3DLDF-2.0.2/src/solfaced.web	Thu Nov  7 13:40:07 2013
--- 3DLDF-2.0.3/src/solfaced.web	Fri Dec 13 15:42:52 2013
***************
*** 235,239 ****
  
  
!   if (solid_faced_reflection == 0)
      {
         try
--- 235,239 ----
  
  
!   if (solid_faced_reflection == static_cast<Solid_Faced*>(0))
      {
         try
diff -rc2P 3DLDF-2.0.2/src/solids.web 3DLDF-2.0.3/src/solids.web
*** 3DLDF-2.0.2/src/solids.web	Thu Nov  7 13:40:07 2013
--- 3DLDF-2.0.3/src/solids.web	Fri Dec 13 15:45:47 2013
***************
*** 665,678 ****
    if (DEBUG)
      {
!       cerr << "paths.size() == " << paths.size() << endl << flush;
!       cerr << "ellipses.size() == " << ellipses.size() << endl << flush;
!       cerr << "circles.size() == " << circles.size() << endl << flush;
  
!       cerr << "parabolae.size() == " << parabolae.size() << endl << flush;
!       cerr << "hyperbolae.size() == " << hyperbolae.size() << endl << flush;
  
        cerr << "reg_polygons.size() == " << reg_polygons.size()
!            << endl << flush;
!       cerr << "rectangles.size() == " << rectangles.size() << endl << flush;
      }
  
--- 665,678 ----
    if (DEBUG)
      {
!       cerr << "paths.size() == " << paths.size() << endl;
!       cerr << "ellipses.size() == " << ellipses.size() << endl;
!       cerr << "circles.size() == " << circles.size() << endl;
  
!       cerr << "parabolae.size() == " << parabolae.size() << endl;
!       cerr << "hyperbolae.size() == " << hyperbolae.size() << endl;
  
        cerr << "reg_polygons.size() == " << reg_polygons.size()
!            << endl;
!       cerr << "rectangles.size() == " << rectangles.size() << endl;
      }
  
***************
*** 909,913 ****
    if (DEBUG)
      {
!       cerr << "Entering Solid::get_shape_ptr().\n" << flush;
      }
  
--- 909,913 ----
    if (DEBUG)
      {
!       cerr << "Entering Solid::get_shape_ptr().\n";
      }
  
***************
*** 925,929 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > paths.size() (" << paths.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 925,929 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > paths.size() (" << paths.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 943,947 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > ellipses.size() (" << ellipses.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 943,947 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > ellipses.size() (" << ellipses.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 960,964 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > circles.size() (" << circles.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 960,964 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > circles.size() (" << circles.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 979,983 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > parabolae.size() (" << parabolae.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 979,983 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > parabolae.size() (" << parabolae.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 997,1001 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > hyperbolae.size() (" << hyperbolae.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 997,1001 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > hyperbolae.size() (" << hyperbolae.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 1018,1022 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > rectangles.size() (" << rectangles.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 1018,1022 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > rectangles.size() (" << rectangles.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 1035,1039 ****
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > reg_polygons.size() (" << reg_polygons.size()
!                 << ")\nReturning a null pointer (0).\n\n" << flush;
              return static_cast<Shape*>(0);
            }
--- 1035,1039 ----
              cerr << "ERROR! In Solid::get_shape_ptr():\n"
                << "s (" << s << ") > reg_polygons.size() (" << reg_polygons.size()
!                 << ")\nReturning a null pointer (0).\n\n";
              return static_cast<Shape*>(0);
            }
***************
*** 1045,1049 ****
          cerr << "ERROR! In Solid::get_shape_ptr():\n"
            << "Invalid value for curr_shape_type: " << curr_shape_type << endl
!             << "Returning a null pointer (0).\n\n" << flush;
          return static_cast<Shape*>(0);
        }
--- 1045,1049 ----
          cerr << "ERROR! In Solid::get_shape_ptr():\n"
            << "Invalid value for curr_shape_type: " << curr_shape_type << endl
!             << "Returning a null pointer (0).\n\n";
          return static_cast<Shape*>(0);
        }
***************
*** 1369,1373 ****
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > circles.size() (" << circles.size()
!             << ")\nReturning INVALID_POINT.\n\n" << flush;
          return INVALID_POINT;
        }
--- 1369,1373 ----
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > circles.size() (" << circles.size()
!             << ")\nReturning INVALID_POINT.\n\n";
          return INVALID_POINT;
        }
***************
*** 1383,1387 ****
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > ellipses.size() (" << ellipses.size()
!             << ")\nReturning INVALID_POINT.\n\n" << flush;
          return INVALID_POINT;
        }
--- 1383,1387 ----
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > ellipses.size() (" << ellipses.size()
!             << ")\nReturning INVALID_POINT.\n\n";
          return INVALID_POINT;
        }
***************
*** 1397,1401 ****
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > rectangles.size() (" << rectangles.size()
!             << ")\nReturning INVALID_POINT.\n\n" << flush;
          return INVALID_POINT;
        }
--- 1397,1401 ----
          cerr << "ERROR! In Solid::get_shape_center():\n"
            << "s (" << s << ") > rectangles.size() (" << rectangles.size()
!             << ")\nReturning INVALID_POINT.\n\n";
          return INVALID_POINT;
        }
***************
*** 1411,1415 ****
        cerr << "ERROR! In Solid::get_shape_center():\n"
          << "s (" << s << ") > reg_polygons.size() (" << reg_polygons.size()
!           << ")\nReturning INVALID_POINT.\n\n" << flush;
        return INVALID_POINT;
      }
--- 1411,1415 ----
        cerr << "ERROR! In Solid::get_shape_center():\n"
          << "s (" << s << ") > reg_polygons.size() (" << reg_polygons.size()
!           << ")\nReturning INVALID_POINT.\n\n";
        return INVALID_POINT;
      }
***************
*** 1422,1426 ****
            cerr << "ERROR! In Solid::get_shape_center():\n"
              << "Invalid argument for curr_shape_type: " << curr_shape_type
!               << endl << "Returning INVALID_POINT.\n\n" << flush;
            return INVALID_POINT;
          }   
--- 1422,1426 ----
            cerr << "ERROR! In Solid::get_shape_center():\n"
              << "Invalid argument for curr_shape_type: " << curr_shape_type
!               << endl << "Returning INVALID_POINT.\n\n";
            return INVALID_POINT;
          }   
***************
*** 2511,2515 ****
  Solid::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
--- 2511,2515 ----
  Solid::push_draw_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2557,2561 ****
  Solid::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 2557,2561 ----
  Solid::push_fill_color(Color*& c, bool copy)
  {
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2603,2610 ****
  Solid::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == 0)
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == 0)
        fill_color_vector = new Pointer_Vector<Color>;
  
--- 2603,2610 ----
  Solid::push_color(Color*& c, bool copy)
  {
!    if (draw_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        draw_color_vector = new Pointer_Vector<Color>;
  
!    if (fill_color_vector == static_cast<Pointer_Vector<Color>*>(0))
        fill_color_vector = new Pointer_Vector<Color>;
  
***************
*** 2652,2656 ****
  Solid::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == 0)
        pen_vector = new Pointer_Vector<Pen>;
  
--- 2652,2656 ----
  Solid::push_pen(Pen*& p, bool copy)
  {
!    if (pen_vector == static_cast<Pointer_Vector<Pen>*>(0))
        pen_vector = new Pointer_Vector<Pen>;
  
***************
*** 2696,2700 ****
  Solid::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == 0)
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
--- 2696,2700 ----
  Solid::push_dash_pattern(Dash_Pattern*& d, bool copy)
  {
!    if (dash_pattern_vector == static_cast<Pointer_Vector<Dash_Pattern>*>(0))
        dash_pattern_vector = new Pointer_Vector<Dash_Pattern>;
  
***************
*** 2863,2867 ****
    else
      cerr << "rectangles is empty.\n";
!   cerr << endl << flush;
    return;
  
--- 2863,2867 ----
    else
      cerr << "rectangles is empty.\n";
!   cerr << endl;
    return;
  
***************
*** 2924,2928 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 2924,2928 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 3372,3376 ****
  
  
!    if (solid_reflection == 0)
       {
          cerr_strm << thread_name 
--- 3372,3376 ----
  
  
!    if (solid_reflection == static_cast<Solid*>(0))
       {
          cerr_strm << thread_name 
***************
*** 4415,4419 ****
  @<Define |Solid| functions@>=
    
!   if (solid_ptr_vector == 0)
       {
  
--- 4415,4419 ----
  @<Define |Solid| functions@>=
    
!   if (solid_ptr_vector == static_cast<Pointer_Vector<Solid>*>(0))
       {
  
***************
*** 4688,4692 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Path cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4688,4692 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Path cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4702,4706 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Ellipse cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4702,4706 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Ellipse cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4716,4720 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Circle cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4716,4720 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Circle cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4730,4734 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Parabola cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4730,4734 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Parabola cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4744,4748 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Hyperbola cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4744,4748 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Hyperbola cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4761,4765 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Polygon cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4761,4765 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Polygon cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4775,4779 ****
              cerr << "WARNING! In Solid::extract():\n"
                   << "Rectangle cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n" << flush;
              return v;
              break;
--- 4775,4779 ----
              cerr << "WARNING! In Solid::extract():\n"
                   << "Rectangle cannot be projected. "
!                  << "Returning empty vector <Shape*>.\n";
              return v;
              break;
***************
*** 4844,4848 ****
    bool DEBUG = false; /* |true| */@;
    if (DEBUG)
!     cerr << "Entering Solid::set_pre_projective_extremes()" << "\n" << flush;
    valarray <real> v;
    v.resize(6, 0);  /* LDF 2002.12.13.  Added.  Needed for compiling
--- 4844,4848 ----
    bool DEBUG = false; /* |true| */@;
    if (DEBUG)
!     cerr << "Entering Solid::set_pre_projective_extremes()" << "\n";
    valarray <real> v;
    v.resize(6, 0);  /* LDF 2002.12.13.  Added.  Needed for compiling
***************
*** 4859,4863 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4859,4863 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 4882,4886 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4882,4886 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 4905,4909 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4905,4909 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 4928,4932 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4928,4932 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 4951,4955 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4951,4955 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 4977,4981 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 4977,4981 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5000,5004 ****
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5000,5004 ----
            cerr << "ERROR! In Solid::set_pre_projective_extremes():\n"
                 << "Path::set_pre_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5017,5021 ****
  
    if (DEBUG)
!     cerr << "Exiting Solid::set_pre_projective_extremes()" << "\n" << flush;
    return true;
  
--- 5017,5021 ----
  
    if (DEBUG)
!     cerr << "Exiting Solid::set_pre_projective_extremes()" << "\n";
    return true;
  
***************
*** 5057,5061 ****
    bool DEBUG = false; /* |true| */@;
    if (DEBUG)
!     cerr << "Entering Solid::set_projective_extremes()" << "\n" << flush;
    valarray <real> v;
    v.resize(6, 0);  /* LDF 2002.12.13.  Added.  Needed for compiling
--- 5057,5061 ----
    bool DEBUG = false; /* |true| */@;
    if (DEBUG)
!     cerr << "Entering Solid::set_projective_extremes()" << "\n";
    valarray <real> v;
    v.resize(6, 0);  /* LDF 2002.12.13.  Added.  Needed for compiling
***************
*** 5072,5076 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5072,5076 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5095,5099 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5095,5099 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5118,5122 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5118,5122 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5141,5145 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5141,5145 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5165,5169 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5165,5169 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5190,5194 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5190,5194 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5213,5217 ****
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n" << flush;
            return false;
          }
--- 5213,5217 ----
            cerr << "ERROR! In Solid::set_projective_extremes():\n"
                 << "Path::set_projective_extremes() returned false. "
!                << "Returning false.\n\n";
            return false;
          }
***************
*** 5230,5234 ****
  
    if (DEBUG)
!     cerr << "Exiting Solid::set_projective_extremes()" << "\n" << flush;
    return true;
  
--- 5230,5234 ----
  
    if (DEBUG)
!     cerr << "Exiting Solid::set_projective_extremes()" << "\n";
    return true;
  
***************
*** 5430,5440 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_minimum_x()" << endl << flush;
  
    if (DEBUG)
!     cerr << "minimum_x == " << projective_extremes[0] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_minimum_x()" << endl << flush;
  
    return projective_extremes[0];
--- 5430,5440 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_minimum_x()" << endl;
  
    if (DEBUG)
!     cerr << "minimum_x == " << projective_extremes[0] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_minimum_x()" << endl;
  
    return projective_extremes[0];
***************
*** 5473,5483 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_maximum_x()" << endl << flush;
  
    if (DEBUG)
!     cerr << "maximum_x == " << projective_extremes[1] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_maximum_x()" << endl << flush;
  
    return projective_extremes[1];
--- 5473,5483 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_maximum_x()" << endl;
  
    if (DEBUG)
!     cerr << "maximum_x == " << projective_extremes[1] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_maximum_x()" << endl;
  
    return projective_extremes[1];
***************
*** 5547,5557 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_minimum_y()" << endl << flush;
  
    if (DEBUG)
!     cerr << "minimum_y == " << projective_extremes[2] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_minimum_y()" << endl << flush;
  
    return projective_extremes[2];
--- 5547,5557 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_minimum_y()" << endl;
  
    if (DEBUG)
!     cerr << "minimum_y == " << projective_extremes[2] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_minimum_y()" << endl;
  
    return projective_extremes[2];
***************
*** 5590,5600 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_maximum_y()" << endl << flush;
  
    if (DEBUG)
!     cerr << "maximum_y == " << projective_extremes[3] << endl << flush;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_maximum_y()" << endl << flush;
  
    return projective_extremes[3];
--- 5590,5600 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::get_maximum_y()" << endl;
  
    if (DEBUG)
!     cerr << "maximum_y == " << projective_extremes[3] << endl;
  
    if (DEBUG)
!     cerr << "Exiting Solid::get_maximum_y()" << endl;
  
    return projective_extremes[3];
***************
*** 5689,5693 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 5689,5693 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 5803,5807 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 5803,5807 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 5917,5921 ****
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != 0)
        scanner_node = thread_info->scanner_node;
  
--- 5917,5921 ----
     Thread_Info_Type* thread_info = Thread_Info_Type::get_thread_info();
  
!    if (thread_info != static_cast<Thread_Info_Type*>(0))
        scanner_node = thread_info->scanner_node;
  
***************
*** 6171,6175 ****
    Color* c = create_new<Color>(0);
    
!   if (color_ptr != 0)
      *c  = *color_ptr;
    else
--- 6171,6175 ----
    Color* c = create_new<Color>(0);
    
!   if (color_ptr != static_cast<Color*>(0))
      *c  = *color_ptr;
    else
***************
*** 6582,6586 ****
     Color* c = create_new<Color>(0);
  
!    if (color_ptr != 0)
        *c  = *color_ptr;
     else
--- 6582,6586 ----
     Color* c = create_new<Color>(0);
  
!    if (color_ptr != static_cast<Color*>(0))
        *c  = *color_ptr;
     else
***************
*** 6651,6655 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::fill():" << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6651,6655 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::fill():" << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 6741,6745 ****
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6741,6745 ----
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6749,6753 ****
        
        cerr << "`Picture::lock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6749,6753 ----
        
        cerr << "`Picture::lock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6780,6784 ****
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 6780,6784 ----
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 6788,6792 ****
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6788,6792 ----
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6803,6807 ****
    if (DEBUG)
      {
!       cerr << "Exiting Solid::fill():" << "\n" << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 6803,6807 ----
    if (DEBUG)
      {
!       cerr << "Exiting Solid::fill():" << "\n";
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 6876,6880 ****
      Color* c = create_new<Color>(0);
  
!   if (draw_color_ptr != 0)
      *c  = *draw_color_ptr;
    else
--- 6876,6880 ----
      Color* c = create_new<Color>(0);
  
!   if (draw_color_ptr != static_cast<Color*>(0))
      *c  = *draw_color_ptr;
    else
***************
*** 6893,6897 ****
    c = create_new<Color>(0);
  
!   if (fill_color_ptr != 0)
      *c  = *fill_color_ptr;
    else
--- 6893,6897 ----
    c = create_new<Color>(0);
  
!   if (fill_color_ptr != static_cast<Color*>(0))
      *c  = *fill_color_ptr;
    else
***************
*** 6974,6978 ****
    if (DEBUG)
      cerr << "Entering Solid::filldraw():" 
!          << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 6974,6978 ----
    if (DEBUG)
      cerr << "Entering Solid::filldraw():" 
!          << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 7072,7076 ****
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7072,7076 ----
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7080,7084 ****
        
        cerr << "`Picture::lock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7080,7084 ----
        
        cerr << "`Picture::lock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7111,7115 ****
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7111,7115 ----
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7119,7123 ****
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7119,7123 ----
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7135,7139 ****
    if (DEBUG)
      {
!       cerr << "Exiting Solid::filldraw():" << "\n" << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7135,7139 ----
    if (DEBUG)
      {
!       cerr << "Exiting Solid::filldraw():" << "\n";
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7221,7225 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::undraw():" << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 7221,7225 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::undraw():" << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 7295,7299 ****
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7295,7299 ----
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7303,7307 ****
        
        cerr << "`Picture::lock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7303,7307 ----
        
        cerr << "`Picture::lock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7334,7338 ****
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7334,7338 ----
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7342,7346 ****
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7342,7346 ----
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7357,7361 ****
    if (DEBUG)
      {
!       cerr << "Exiting Solid::undraw():" << "\n" << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7357,7361 ----
    if (DEBUG)
      {
!       cerr << "Exiting Solid::undraw():" << "\n";
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7430,7434 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::unfill():" << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 7430,7434 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::unfill():" << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 7503,7507 ****
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7503,7507 ----
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7511,7515 ****
        
        cerr << "`Picture::lock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7511,7515 ----
        
        cerr << "`Picture::lock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7542,7546 ****
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7542,7546 ----
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7550,7554 ****
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7550,7554 ----
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7565,7569 ****
    if (DEBUG)
      {
!       cerr << "Exiting Solid::unfill():" << "\n" << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7565,7569 ----
    if (DEBUG)
      {
!       cerr << "Exiting Solid::unfill():" << "\n";
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7673,7677 ****
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::unfilldraw():" << "\n" << flush;
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 7673,7677 ----
    bool DEBUG = false; /* |true| */
    if (DEBUG)
!     cerr << "Entering Solid::unfilldraw():" << "\n";
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 7744,7748 ****
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7744,7748 ----
               << "`Picture::lock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7752,7756 ****
        
        cerr << "`Picture::lock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7752,7756 ----
        
        cerr << "`Picture::lock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7784,7788 ****
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl << flush;
          return 1;
        }
--- 7784,7788 ----
               << "`Picture::unlock()' failed. "
               << "Returning 1 and will try to continue."
!              << endl;
          return 1;
        }
***************
*** 7792,7796 ****
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7792,7796 ----
        
        cerr << "`Picture::unlock()' succeeded."
!            << endl;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
***************
*** 7806,7810 ****
    if (DEBUG)
      {
!       cerr << "Exiting Solid::unfilldraw():" << "\n" << flush;
      }
  #endif /* |DEBUG_COMPILE|  */@; 
--- 7806,7810 ----
    if (DEBUG)
      {
!       cerr << "Exiting Solid::unfilldraw():" << "\n";
      }
  #endif /* |DEBUG_COMPILE|  */@; 
diff -rc2P 3DLDF-2.0.2/src/spdvexpr.w 3DLDF-2.0.3/src/spdvexpr.w
*** 3DLDF-2.0.2/src/spdvexpr.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/spdvexpr.w	Fri Dec 13 12:51:30 2013
***************
*** 89,93 ****
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == 0 || entry->object == 0)
      {
  
--- 89,93 ----
    Id_Map_Entry_Node entry = static_cast<Id_Map_Entry_Node>(@=$1@>);
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
***************
*** 156,165 ****
  @<Define rules@>=
  
!    if (pv == 0)
        {
  
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |if (pv == 0)|  */
--- 156,165 ----
  @<Define rules@>=
  
!    if (pv == static_cast<Pointer_Vector<Sphere_Development>*>(0))
        {
  
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |if (pv == 0)|  */
***************
*** 176,180 ****
            delete c;
  
!           @=$$@> = 0;
  
        }  /* |else if (pv->ctr == 0)|  */
--- 176,180 ----
            delete c;
  
!           @=$$@> = static_cast<void*>(0);
  
        }  /* |else if (pv->ctr == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/spdvvexp.w 3DLDF-2.0.3/src/spdvvexp.w
*** 3DLDF-2.0.2/src/spdvvexp.w	Thu Nov  7 13:36:02 2013
--- 3DLDF-2.0.3/src/spdvvexp.w	Fri Dec 13 11:59:33 2013
***************
*** 100,107 ****
  @<Define rules@>=
  
!   if (entry == 0 || entry->object == 0)
      {
  
!       @=$$@> = 0;
  
      } /* |if (entry == 0 || entry->object == 0)|  */
--- 100,107 ----
  @<Define rules@>=
  
!   if (entry == static_cast<Id_Map_Entry_Node>(0) || entry->object == static_cast<void*>(0))
      {
  
!       @=$$@> = static_cast<void*>(0);
  
      } /* |if (entry == 0 || entry->object == 0)|  */
diff -rc2P 3DLDF-2.0.2/src/spheres.web 3DLDF-2.0.3/src/spheres.web
*** 3DLDF-2.0.2/src/spheres.web	Wed Nov  6 20:57:22 2013
--- 3DLDF-2.0.3/src/spheres.web	Fri Dec 13 15:47:46 2013
***************
*** 361,365 ****
  @q ******* (7).@>
  
!           if (options == 0)
                {
                    cerr_strm << thread_name << "In `Sphere::set':"
--- 361,365 ----
  @q ******* (7).@>
  
!           if (options == static_cast<Sphere_Set_Option_Struct*>(0))
                {
                    cerr_strm << thread_name << "In `Sphere::set':"
***************
*** 428,432 ****
  @<Define |Sphere| functions@>= 
  
!    if (options == 0)
        {
            cerr << "options == 0" << endl;
--- 428,432 ----
  @<Define |Sphere| functions@>= 
  
!    if (options == static_cast<Sphere_Set_Option_Struct*>(0))
        {
            cerr << "options == 0" << endl;
***************
*** 465,469 ****
  @<Define |Sphere| functions@>= 
  
!    if (options == 0)
        {
  #if DEBUG_COMPILE
--- 465,469 ----
  @<Define |Sphere| functions@>= 
  
!    if (options == static_cast<Sphere_Set_Option_Struct*>(0))
        {
  #if DEBUG_COMPILE
***************
*** 518,522 ****
  @<Define |Sphere| functions@>= 
  
!    if (options == 0)
        {
  #if DEBUG_COMPILE
--- 518,522 ----
  @<Define |Sphere| functions@>= 
  
!    if (options == static_cast<Sphere_Set_Option_Struct*>(0))
        {
  #if DEBUG_COMPILE
***************
*** 540,544 ****
  
  
!    else if (options->radius == 0)
        {
  #if DEBUG_COMPILE
--- 540,544 ----
  
  
!    else if (options->radius == ZERO_REAL)
        {
  #if DEBUG_COMPILE
***************
*** 614,618 ****
  @<Define |Sphere| functions@>= 
  
!    if (options == 0)
        {
  #if DEBUG_COMPILE
--- 614,618 ----
  @<Define |Sphere| functions@>= 
  
!    if (options == static_cast<Sphere_Set_Option_Struct*>(0))
        {
  #if DEBUG_COMPILE
***************
*** 1508,1512 ****
  {
  
!     if (center != 0)
         center->shift_times(x, y, z);
  
--- 1508,1512 ----
  {
  
!     if (center != static_cast<Point*>(0))
         center->shift_times(x, y, z);
  
***************
*** 1801,1805 ****
     point_pair.first  = a + (lambda1 * v);
  
!    if (root_value == 0)
        {
           point_pair.second = INVALID_POINT;
--- 1801,1805 ----
     point_pair.first  = a + (lambda1 * v);
  
!    if (root_value == ZERO_REAL)
        {
           point_pair.second = INVALID_POINT;
***************
*** 2029,2033 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 2029,2033 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 2385,2389 ****
  @q ***** (5).@> 
  
!    if (center == 0)
        cerr << "center == 0" << endl;
     else
--- 2385,2389 ----
  @q ***** (5).@> 
  
!    if (center == static_cast<Point*>(0))
        cerr << "center == 0" << endl;
     else
diff -rc2P 3DLDF-2.0.2/src/sphrdevl.web 3DLDF-2.0.3/src/sphrdevl.web
*** 3DLDF-2.0.2/src/sphrdevl.web	Wed Nov  6 20:57:22 2013
--- 3DLDF-2.0.3/src/sphrdevl.web	Fri Dec 13 15:52:51 2013
***************
*** 252,256 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 252,256 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 291,295 ****
  @q ****** (6).@> 
  
!     if (options == 0)
      {
  
--- 291,295 ----
  @q ****** (6).@> 
  
!     if (options == static_cast<Sphere_Development_Set_Option_Struct*>(0))
      {
  
***************
*** 577,581 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 577,581 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
***************
*** 707,711 ****
  
  #if DEBUG_COMPILE
!    bool DEBUG = true; /* |false| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
--- 707,711 ----
  
  #if DEBUG_COMPILE
!    bool DEBUG = false; /* |true| */ @; 
  #endif /* |DEBUG_COMPILE|  */@; 
  
diff -rc2P 3DLDF-2.0.2/src/transfor.web 3DLDF-2.0.3/src/transfor.web
*** 3DLDF-2.0.2/src/transfor.web	Thu Nov  7 13:40:07 2013
--- 3DLDF-2.0.3/src/transfor.web	Fri Dec 13 15:54:34 2013
***************
*** 523,527 ****
      for (int j = 0; j < 4; j++)
        if ((i == j && transform_matrix[i][j] != 1)
!           || ((i != j) && transform_matrix[i][j] != 0))
          return false;
    return true;
--- 523,527 ----
      for (int j = 0; j < 4; j++)
        if ((i == j && transform_matrix[i][j] != 1)
!           || ((i != j) && transform_matrix[i][j] != ZERO_REAL))
          return false;
    return true;
***************
*** 546,550 ****
      for (int j = 0; j < 4; j++)
        if ((i == j && transform_matrix[i][j] != 1)
!           || ((i != j) && transform_matrix[i][j] != 0))
          return false;
    return true;
--- 546,550 ----
      for (int j = 0; j < 4; j++)
        if ((i == j && transform_matrix[i][j] != 1)
!           || ((i != j) && transform_matrix[i][j] != ZERO_REAL))
          return false;
    return true;
***************
*** 720,724 ****
    
  
!   if (xy == 0 && xz == 0 && yx == 0 && yz == 0 && zx == 0 && zy == 0)
      {
        cerr << "WARNING! In Transform::shear():\n"
--- 720,729 ----
    
  
!   if (   xy == ZERO_REAL 
!       && xz == ZERO_REAL 
!       && yx == ZERO_REAL 
!       && yz == ZERO_REAL 
!       && zx == ZERO_REAL 
!       && zy == ZERO_REAL)
      {
        cerr << "WARNING! In Transform::shear():\n"
***************
*** 760,764 ****
    Transform t;
  
!   if (x == 0 && y == 0 && z == 0)
      return t;
  
--- 765,769 ----
    Transform t;
  
!   if (x == ZERO_REAL && y == ZERO_REAL && z == ZERO_REAL)
      return t;
  
***************
*** 840,849 ****
    real eps = epsilon();
  
!   if (x == 0 && y == 0 && z == 0)
      {
        if (DEBUG) 
          cerr << "In rotate(real, real, real)\n"
!              << "0 rotation about all axes. Returning identity matrix.\n"
!             ;
        return t_all;
      }
--- 845,854 ----
    real eps = epsilon();
  
!   if (x == ZERO_REAL && y == ZERO_REAL && z == ZERO_REAL)
      {
        if (DEBUG) 
          cerr << "In rotate(real, real, real)\n"
!              << "0 rotation about all axes. Returning identity matrix.\n";
! 
        return t_all;
      }
***************
*** 860,864 ****
  @ Rotation around the x-axis.
  @<Define |Transform| functions@>=
!   if (x != 0)
      {
  
--- 865,870 ----
  @ Rotation around the x-axis.
  @<Define |Transform| functions@>=
! 
!   if (x != ZERO_REAL)
      {
  
***************
*** 887,891 ****
  @ Rotation around the y-axis.
  @<Define |Transform| functions@>=
!   if (y != 0)
      {
  
--- 893,898 ----
  @ Rotation around the y-axis.
  @<Define |Transform| functions@>=
! 
!   if (y != ZERO_REAL)
      {
  
***************
*** 912,916 ****
  @ Rotation around the z-axis.
  @<Define |Transform| functions@>=
!    if (z != 0)
       {
  
--- 919,924 ----
  @ Rotation around the z-axis.
  @<Define |Transform| functions@>=
! 
!    if (z != ZERO_REAL)
       {
  
***************
*** 1290,1298 ****
            cout << "row == " << row << endl;
          }
!       if (max == 0)
          {
            cerr << "ERROR! In Transform::inverse():\n"
!                << "Transform_Matrix is singular.  Returning INVALID_TRANSFORM.\n"
!               ;
            return INVALID_TRANSFORM;
          }
--- 1298,1307 ----
            cout << "row == " << row << endl;
          }
! 
!       if (max == ZERO_REAL)
          {
            cerr << "ERROR! In Transform::inverse():\n"
!                << "Transform_Matrix is singular.  Returning INVALID_TRANSFORM.\n";
! 
            return INVALID_TRANSFORM;
          }
diff -rc2P 3DLDF-2.0.2/src/utility.web 3DLDF-2.0.3/src/utility.web
*** 3DLDF-2.0.2/src/utility.web	Thu Nov  7 13:40:07 2013
--- 3DLDF-2.0.3/src/utility.web	Fri Dec 13 15:55:05 2013
***************
*** 216,226 ****
  
  
!   if (horizon_rt == 0)
      horizon_rt = horizon_lft;
  
!   if (gl_lft == 0)
      gl_lft = horizon_lft;
  
!   if (gl_rt == 0)
      gl_rt = horizon_rt; 
  
--- 216,226 ----
  
  
!   if (horizon_rt == ZERO_REAL)
      horizon_rt = horizon_lft;
  
!   if (gl_lft == ZERO_REAL)
      gl_lft = horizon_lft;
  
!   if (gl_rt == ZERO_REAL)
      gl_rt = horizon_rt; 
  
***************
*** 290,294 ****
        cerr << "points[" << points.size()
             << "]. Angle = " << *iter <<". x = " 
!            << q.get_x() << endl << flush;
  #endif 
        points.push_back(create_new<Point>(q));                   
--- 290,294 ----
        cerr << "points[" << points.size()
             << "]. Angle = " << *iter <<". x = " 
!            << q.get_x() << endl;
  #endif 
        points.push_back(create_new<Point>(q));                   
***************
*** 426,431 ****
      {
        cerr << "ERROR! In persp_0():\n"
!            << "front_corner_z < 0.\nReturning.\n\n"
!            << flush;
        return;
      }
--- 426,431 ----
      {
        cerr << "ERROR! In persp_0():\n"
!            << "front_corner_z < 0.\nReturning.\n\n";
! 
        return;
      }
***************
*** 442,452 ****
  
  
!   if (horizon_rt == 0)
      horizon_rt = horizon_lft;
  
!   if (gl_lft == 0)
      gl_lft = horizon_lft;
  
!   if (gl_rt == 0)
      gl_rt = horizon_rt; 
  
--- 442,452 ----
  
  
!   if (horizon_rt == ZERO_REAL)
      horizon_rt = horizon_lft;
  
!   if (gl_lft == ZERO_REAL)
      gl_lft = horizon_lft;
  
!   if (gl_rt == ZERO_REAL)
      gl_rt = horizon_rt; 
  
***************
*** 632,637 ****
    Point back_corner = Point::intersection_point(right_corner, vpl, left_corner, vpr).pt;
    back_corner.dotlabel(picture, "$r_2$"); 
!   Path pa("--", true, &front_corner, &right_corner, &back_corner, &left_corner, 0);
! 
  
    Point center = Point::intersection_point(front_corner, back_corner,
--- 632,642 ----
    Point back_corner = Point::intersection_point(right_corner, vpl, left_corner, vpr).pt;
    back_corner.dotlabel(picture, "$r_2$"); 
!   Path pa("--", 
!           true, 
!           &front_corner, 
!           &right_corner, 
!           &back_corner, 
!           &left_corner, 
!           static_cast<Point*>(0));
  
    Point center = Point::intersection_point(front_corner, back_corner,